leap-1.1.1.js

/*!                                                              
 * LeapJS v1.1.1                                                  
 * http://github.com/leapmotion/leapjs/                                        
 *                                                                             
 * Copyright 2021 Ultraleap, Inc. and other contributors                       
 * Released under the Apache-2.0 license                                       
 * http://github.com/leapmotion/leapjs/blob/master/LICENSE                     
 */
(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
var Pointable = require('./pointable')
  , glMatrix = require("gl-matrix")
  , vec3 = glMatrix.vec3
  , mat3 = glMatrix.mat3
  , mat4 = glMatrix.mat4;


var Bone = module.exports = function(finger, data) {
  this.finger = finger;

  this._center = null, this._matrix = null;

  /**
  * An integer code for the name of this bone.
  *
  * * 0 -- metacarpal
  * * 1 -- proximal
  * * 2 -- medial
  * * 3 -- distal
  * * 4 -- arm
  *
  * @member type
  * @type {number}
  * @memberof Leap.Bone.prototype
  */
  this.type = data.type;

  /**
   * The position of the previous, or base joint of the bone closer to the wrist.
   * @type {vector3}
   */
  this.prevJoint = data.prevJoint;

  /**
   * The position of the next joint, or the end of the bone closer to the finger tip.
   * @type {vector3}
   */
  this.nextJoint = data.nextJoint;

  /**
   * The estimated width of the pointable in millimeters.
   *
   * The reported width is the average width of the visible portion of the
   * pointable from the hand to the tip. If the width isn't known,
   * then a value of 0 is returned.
   *
   * Bone objects representing fingers do not have a width property.
   *
   * @member width
   * @type {number}
   * @memberof Leap.Pointable.prototype
   */
  this.width = data.width;

  var displacement = new Array(3);
  vec3.sub(displacement, data.nextJoint, data.prevJoint);

  this.length = vec3.length(displacement);


  /**
   *
   * These fully-specify the orientation of the bone.
   * See examples/threejs-bones.html for more info
   * Three vec3s:
   *  x (red): The rotation axis of the finger, pointing outwards.  (In general, away from the thumb )
   *  y (green): The "up" vector, orienting the top of the finger
   *  z (blue): The roll axis of the bone.
   *
   *  Most up vectors will be pointing the same direction, except for the thumb, which is more rightwards.
   *
   *  The thumb has one fewer bones than the fingers, but there are the same number of joints & joint-bases provided
   *  the first two appear in the same position, but only the second (proximal) rotates.
   *
   *  Normalized.
   */
  this.basis = data.basis;
};

Bone.prototype.left = function(){

  if (this._left) return this._left;

  this._left =  mat3.determinant(this.basis[0].concat(this.basis[1]).concat(this.basis[2])) < 0;

  return this._left;

};


/**
 * The Affine transformation matrix describing the orientation of the bone, in global Leap-space.
 * It contains a 3x3 rotation matrix (in the "top left"), and center coordinates in the fourth column.
 *
 * Unlike the basis, the right and left hands have the same coordinate system.
 *
 */
Bone.prototype.matrix = function(){

  if (this._matrix) return this._matrix;

  var b = this.basis,
      t = this._matrix = mat4.create();

  // open transform mat4 from rotation mat3
  t[0] = b[0][0], t[1] = b[0][1], t[2]  = b[0][2];
  t[4] = b[1][0], t[5] = b[1][1], t[6]  = b[1][2];
  t[8] = b[2][0], t[9] = b[2][1], t[10] = b[2][2];

  t[3] = this.center()[0];
  t[7] = this.center()[1];
  t[11] = this.center()[2];

  if ( this.left() ) {
    // flip the basis to be right-handed
    t[0] *= -1;
    t[1] *= -1;
    t[2] *= -1;
  }

  return this._matrix;
};

/**
 * Helper method to linearly interpolate between the two ends of the bone.
 *
 * when t = 0, the position of prevJoint will be returned
 * when t = 1, the position of nextJoint will be returned
 */
Bone.prototype.lerp = function(out, t){

  vec3.lerp(out, this.prevJoint, this.nextJoint, t);

};

/**
 *
 * The center position of the bone
 * Returns a vec3 array.
 *
 */
Bone.prototype.center = function(){

  if (this._center) return this._center;

  var center = vec3.create();
  this.lerp(center, 0.5);
  this._center = center;
  return center;

};

// The negative of the z-basis
Bone.prototype.direction = function(){

 return [
   this.basis[2][0] * -1,
   this.basis[2][1] * -1,
   this.basis[2][2] * -1
 ];

};

},{"./pointable":14,"gl-matrix":21}],2:[function(require,module,exports){
var CircularBuffer = module.exports = function(size) {
  this.pos = 0;
  this._buf = [];
  this.size = size;
}

CircularBuffer.prototype.get = function(i) {
  if (i == undefined) i = 0;
  if (i >= this.size) return undefined;
  if (i >= this._buf.length) return undefined;
  return this._buf[(this.pos - i - 1) % this.size];
}

CircularBuffer.prototype.push = function(o) {
  this._buf[this.pos % this.size] = o;
  return this.pos++;
}

},{}],3:[function(require,module,exports){
var chooseProtocol = require('../protocol').chooseProtocol
  , EventEmitter = require('events').EventEmitter;

var BaseConnection = module.exports = function(opts) {
  this.opts = Object.assign({
    host : '127.0.0.1',
    scheme: this.getScheme(),
    port: this.getPort(),
    background: false,
    optimizeHMD: false,
    optimizeScreentop: false,
    requestProtocolVersion: BaseConnection.defaultProtocolVersion
  }, opts || {});
  this.host = this.opts.host;
  this.port = this.opts.port;
  this.scheme = this.opts.scheme;
  this.protocolVersionVerified = false;
  this.background = null;
  this.optimizeHMD = null;
  this.optimizeScreentop = null;
  this.on('ready', function() {
    this.setBackground(this.opts.background);
    this.setOptimizeHMD(this.opts.optimizeHMD);
    this.setOptimizeScreentop(this.opts.optimizeScreentop);

    if (this.opts.optimizeHMD){
      console.log("Optimized for head mounted display usage.");
    }else if (this.opts.optimizeScreentop){
      console.log("Optimized for screentop usage.");
    }else {
      console.log("Optimized for desktop usage.");
    }

  });
};

// The latest available:
BaseConnection.defaultProtocolVersion = 6;

BaseConnection.prototype.getUrl = function() {
  return this.scheme + "//" + this.host + ":" + this.port + "/v" + this.opts.requestProtocolVersion + ".json";
}


BaseConnection.prototype.getScheme = function(){
  return 'ws:'
}

BaseConnection.prototype.getPort = function(){
  return 6437
}


BaseConnection.prototype.setBackground = function(state) {
  this.opts.background = state;
  if (this.protocol && this.protocol.sendBackground && this.background !== this.opts.background) {
    this.background = this.opts.background;
    this.protocol.sendBackground(this, this.opts.background);
  }
}

BaseConnection.prototype.setOptimizeHMD = function(state) {
  this.opts.optimizeHMD = state;
  if (this.protocol && this.protocol.sendOptimizeHMD && this.optimizeHMD !== this.opts.optimizeHMD) {
	if (state === true) this.optimizeScreentop = false;
    this.optimizeHMD = this.opts.optimizeHMD;
    this.protocol.sendOptimizeHMD(this, this.opts.optimizeHMD);
  }
}

BaseConnection.prototype.setOptimizeScreentop = function(state) {
  this.opts.optimizeScreentop = state;
  if (this.protocol && this.protocol.sendOptimizeScreentop && this.optimizeScreentop !== this.opts.optimizeScreentop) {
	if (state === true) this.optimizeHMD = false;
    this.optimizeScreentop = this.opts.optimizeScreentop;
    this.protocol.sendOptimizeScreentop(this, this.opts.optimizeScreentop);
  }
}

BaseConnection.prototype.handleOpen = function() {
  if (!this.connected) {
    this.connected = true;
    this.emit('connect');
  }
}

BaseConnection.prototype.handleClose = function(code, reason) {
  if (!this.connected) return;
  this.disconnect();

  // 1001 - an active connection is closed
  // 1006 - cannot connect
  if (code === 1001 && this.opts.requestProtocolVersion > 1) {
    if (this.protocolVersionVerified) {
      this.protocolVersionVerified = false;
    }else{
      this.opts.requestProtocolVersion--;
    }
  }
  this.startReconnection();
}

BaseConnection.prototype.startReconnection = function() {
  var connection = this;
  if(!this.reconnectionTimer){
    (this.reconnectionTimer = setInterval(function() { connection.reconnect() }, 500));
  }
}

BaseConnection.prototype.stopReconnection = function() {
  this.reconnectionTimer = clearInterval(this.reconnectionTimer);
}

// By default, disconnect will prevent auto-reconnection.
// Pass in true to allow the reconnection loop not be interrupted continue
BaseConnection.prototype.disconnect = function(allowReconnect) {
  if (!allowReconnect) this.stopReconnection();
  if (!this.socket) return;
  this.socket.close();
  delete this.socket;
  delete this.protocol;
  delete this.background; // This is not persisted when reconnecting to the web socket server
  delete this.optimizeHMD;
  delete this.optimizeScreentop;
  delete this.focusedState;
  if (this.connected) {
    this.connected = false;
    this.emit('disconnect');
  }
  return true;
}

BaseConnection.prototype.reconnect = function() {
  if (this.connected) {
    this.stopReconnection();
  } else {
    this.disconnect(true);
    this.connect();
  }
}

BaseConnection.prototype.handleData = function(data) {
  var message = JSON.parse(data);

  var messageEvent;
  if (this.protocol === undefined) {
    messageEvent = this.protocol = chooseProtocol(message);
    this.protocolVersionVerified = true;
    this.emit('ready');
  } else {
    messageEvent = this.protocol(message);
  }
  this.emit(messageEvent.type, messageEvent);
}

BaseConnection.prototype.connect = function() {
  if (this.socket) return;
  this.socket = this.setupSocket();
  return true;
}

BaseConnection.prototype.send = function(data) {
  this.socket.send(data);
}

BaseConnection.prototype.reportFocus = function(state) {
  if (!this.connected || this.focusedState === state) return;
  this.focusedState = state;
  this.emit(this.focusedState ? 'focus' : 'blur');
  if (this.protocol && this.protocol.sendFocused) {
    this.protocol.sendFocused(this, this.focusedState);
  }
}

Object.assign(BaseConnection.prototype, EventEmitter.prototype);
},{"../protocol":15,"events":31}],4:[function(require,module,exports){
var BaseConnection = module.exports = require('./base');


var BrowserConnection = module.exports = function(opts) {
  BaseConnection.call(this, opts);
  var connection = this;
  this.on('ready', function() { connection.startFocusLoop(); })
  this.on('disconnect', function() { connection.stopFocusLoop(); })
}

Object.assign(BrowserConnection.prototype, BaseConnection.prototype);

BrowserConnection.__proto__ = BaseConnection;

BrowserConnection.prototype.useSecure = function(){
  return location.protocol === 'https:'
}

BrowserConnection.prototype.getScheme = function(){
  return this.useSecure() ? 'wss:' : 'ws:'
}

BrowserConnection.prototype.getPort = function(){
  return this.useSecure() ? 6436 : 6437
}

BrowserConnection.prototype.setupSocket = function() {
  var connection = this;
  var socket = new WebSocket(this.getUrl());
  socket.onopen = function() { connection.handleOpen(); };
  socket.onclose = function(data) { connection.handleClose(data['code'], data['reason']); };
  socket.onmessage = function(message) { connection.handleData(message.data) };
  socket.onerror = function(error) {

    // attempt to degrade to ws: after one failed attempt for older Leap Service installations.
    if (connection.useSecure() && connection.scheme === 'wss:'){
      connection.scheme = 'ws:';
      connection.port = 6437;
      connection.disconnect();
      connection.connect();
    }

  };
  return socket;
}

BrowserConnection.prototype.startFocusLoop = function() {
  if (this.focusDetectorTimer) return;
  var connection = this;
  var propertyName = null;
  if (typeof document.hidden !== "undefined") {
    propertyName = "hidden";
  } else if (typeof document.mozHidden !== "undefined") {
    propertyName = "mozHidden";
  } else if (typeof document.msHidden !== "undefined") {
    propertyName = "msHidden";
  } else if (typeof document.webkitHidden !== "undefined") {
    propertyName = "webkitHidden";
  } else {
    propertyName = undefined;
  }

  if (connection.windowVisible === undefined) {
    connection.windowVisible = propertyName === undefined ? true : document[propertyName] === false;
  }

  var focusListener = window.addEventListener('focus', function(e) {
    connection.windowVisible = true;
    updateFocusState();
  });

  var blurListener = window.addEventListener('blur', function(e) {
    connection.windowVisible = false;
    updateFocusState();
  });

  this.on('disconnect', function() {
    window.removeEventListener('focus', focusListener);
    window.removeEventListener('blur', blurListener);
  });

  var updateFocusState = function() {
    var isVisible = propertyName === undefined ? true : document[propertyName] === false;
    connection.reportFocus(isVisible && connection.windowVisible);
  }

  // save 100ms when resuming focus
  updateFocusState();

  this.focusDetectorTimer = setInterval(updateFocusState, 100);
}

BrowserConnection.prototype.stopFocusLoop = function() {
  if (!this.focusDetectorTimer) return;
  clearTimeout(this.focusDetectorTimer);
  delete this.focusDetectorTimer;
}

},{"./base":3}],5:[function(require,module,exports){
var WebSocket = require('ws')
  , BaseConnection = require('./base');

var NodeConnection = module.exports = function(opts) {
  BaseConnection.call(this, opts);
  var connection = this;
  this.on('ready', function() { connection.reportFocus(true); });
}

Object.assign(NodeConnection.prototype, BaseConnection.prototype);

NodeConnection.__proto__ = BaseConnection;

NodeConnection.prototype.setupSocket = function() {
  var connection = this;
  var socket = new WebSocket(this.getUrl());
  socket.on('open', function() { connection.handleOpen(); });
  socket.on('message', function(m) { connection.handleData(m); });
  socket.on('close', function(code, reason) { connection.handleClose(code, reason); });
  socket.on('error', function() { connection.startReconnection(); });
  return socket;
}

},{"./base":3,"ws":33}],6:[function(require,module,exports){
(function (process){(function (){
var Frame = require('./frame')
  , Hand = require('./hand')
  , Pointable = require('./pointable')
  , Finger = require('./finger')
  , CircularBuffer = require("./circular_buffer")
  , Pipeline = require("./pipeline")
  , EventEmitter = require('events').EventEmitter
  , Dialog = require('./dialog');

/**
 * Constructs a Controller object.
 *
 * When creating a Controller object, you may optionally pass in options
 * to set the host , set the port, or select the frame event type.
 *
 * ```javascript
 * var controller = new Leap.Controller({
 *   host: '127.0.0.1',
 *   port: 6437,
 *   frameEventName: 'animationFrame'
 * });
 * ```
 *
 * @class Controller
 * @memberof Leap
 * @classdesc
 * The Controller class is your main interface to the Leap Motion Controller.
 *
 * Create an instance of this Controller class to access frames of tracking data
 * and configuration information. Frame data can be polled at any time using the
 * [Controller.frame]{@link Leap.Controller#frame}() function. Call frame() or frame(0) to get the most recent
 * frame. Set the history parameter to a positive integer to access previous frames.
 * A controller stores up to 60 frames in its frame history.
 *
 * Polling is an appropriate strategy for applications which already have an
 * intrinsic update loop, such as a game.
 *
 * loopWhileDisconnected defaults to true, and maintains a 60FPS frame rate even when Leap Motion is not streaming
 * data at that rate (such as no hands in frame).  This is important for VR/WebGL apps which rely on rendering for
 * regular visual updates, including from other input devices.  Flipping this to false should be considered an
 * optimization for very specific use-cases.
 *
 *
 */


var Controller = module.exports = function(opts) {
  var inNode = (typeof(process) !== 'undefined' && process.versions && process.versions.node),
    controller = this;

  this.inNode = inNode;

  opts = Object.assign({
    inNode: this.inNode,
    frameEventName: this.useAnimationLoop() ? 'animationFrame' : 'deviceFrame',
    suppressAnimationLoop: !this.useAnimationLoop(),
    loopWhileDisconnected: true,
    useAllPlugins: false,
    checkVersion: true
  }, opts || {});

  this.animationFrameRequested = false;
  this.onAnimationFrame = function(timestamp) {
    if (controller.lastConnectionFrame.valid){
      controller.emit('animationFrame', controller.lastConnectionFrame);
    }
    controller.emit('frameEnd', timestamp);
    if (
      controller.loopWhileDisconnected &&
      ( ( controller.connection.focusedState !== false )  // loop while undefined, pre-ready.
        || controller.connection.opts.background) ){
      window.requestAnimationFrame(controller.onAnimationFrame);
    }else{
      controller.animationFrameRequested = false;
    }
  };
  this.suppressAnimationLoop = opts.suppressAnimationLoop;
  this.loopWhileDisconnected = opts.loopWhileDisconnected;
  this.frameEventName = opts.frameEventName;
  this.useAllPlugins = opts.useAllPlugins;
  this.history = new CircularBuffer(200);
  this.lastFrame = Frame.Invalid;
  this.lastValidFrame = Frame.Invalid;
  this.lastConnectionFrame = Frame.Invalid;
  this.checkVersion = opts.checkVersion;
  if (opts.connectionType === undefined) {
    this.connectionType = (this.inBrowser() ? require('./connection/browser') : require('./connection/node'));
  } else {
    this.connectionType = opts.connectionType;
  }
  this.connection = new this.connectionType(opts);
  this.streamingCount = 0;
  this.devices = {};
  this.plugins = {};
  this._pluginPipelineSteps = {};
  this._pluginExtendedMethods = {};
  if (opts.useAllPlugins) this.useRegisteredPlugins();
  this.setupFrameEvents(opts);
  this.setupConnectionEvents();
  
  this.startAnimationLoop(); // immediately when started
}

/*
 * @returns the controller
 */
Controller.prototype.setBackground = function(state) {
  this.connection.setBackground(state);
  return this;
}

Controller.prototype.setOptimizeHMD = function(state) {
  this.connection.setOptimizeHMD(state);
  return this;
}

Controller.prototype.setOptimizeScreentop = function(state) {
  this.connection.setOptimizeScreentop(state);
  return this;
}

Controller.prototype.inBrowser = function() {
  return !this.inNode;
}

Controller.prototype.useAnimationLoop = function() {
  return this.inBrowser() && !this.inBackgroundPage();
}

Controller.prototype.inBackgroundPage = function(){
  // http://developer.chrome.com/extensions/extension#method-getBackgroundPage
  return (typeof(chrome) !== "undefined") &&
    chrome.extension &&
    chrome.extension.getBackgroundPage &&
    (chrome.extension.getBackgroundPage() === window)
}

/*
 * @returns the controller
 */
Controller.prototype.connect = function() {
  this.connection.connect();
  return this;
}

Controller.prototype.streaming = function() {
  return this.streamingCount > 0;
}

Controller.prototype.connected = function() {
  return !!this.connection.connected;
}

Controller.prototype.startAnimationLoop = function(){
  if (!this.suppressAnimationLoop && !this.animationFrameRequested) {
    this.animationFrameRequested = true;
    window.requestAnimationFrame(this.onAnimationFrame);
  }
}

/*
 * @returns the controller
 */
Controller.prototype.disconnect = function() {
  this.connection.disconnect();
  return this;
}

/**
 * Returns a frame of tracking data from the Leap.
 *
 * Use the optional history parameter to specify which frame to retrieve.
 * Call frame() or frame(0) to access the most recent frame; call frame(1) to
 * access the previous frame, and so on. If you use a history value greater
 * than the number of stored frames, then the controller returns an invalid frame.
 *
 * @method frame
 * @memberof Leap.Controller.prototype
 * @param {number} history The age of the frame to return, counting backwards from
 * the most recent frame (0) into the past and up to the maximum age (59).
 * @returns {Leap.Frame} The specified frame; or, if no history
 * parameter is specified, the newest frame. If a frame is not available at
 * the specified history position, an invalid Frame is returned.
 **/
Controller.prototype.frame = function(num) {
  return this.history.get(num) || Frame.Invalid;
}

Controller.prototype.loop = function(callback) {
  if (callback) {
    if (typeof callback === 'function'){
      this.on(this.frameEventName, callback);
    }else{
      // callback is actually of the form: {eventName: callback}
      this.setupFrameEvents(callback);
    }
  }

  return this.connect();
}

Controller.prototype.addStep = function(step) {
  if (!this.pipeline) this.pipeline = new Pipeline(this);
  this.pipeline.addStep(step);
}

// this is run on every deviceFrame
Controller.prototype.processFrame = function(frame) {
  // lastConnectionFrame is used by the animation loop
  this.lastConnectionFrame = frame;
  this.startAnimationLoop(); // Only has effect if loopWhileDisconnected: false
  this.emit('deviceFrame', frame);
}

// on a this.deviceEventName (usually 'animationFrame' in browsers), this emits a 'frame'
Controller.prototype.processFinishedFrame = function(frame) {
  this.lastFrame = frame;
  if (frame.valid) {
    this.lastValidFrame = frame;
  }
  frame.controller = this;
  frame.historyIdx = this.history.push(frame);
  if (this.pipeline) {
    frame = this.pipeline.run(frame);
    if (!frame) frame = Frame.Invalid;
  }
  this.emit('frame', frame);
  this.emitHandEvents(frame);
}

/**
 * The controller will emit 'hand' events for every hand on each frame.  The hand in question will be passed
 * to the event callback.
 *
 * @param frame
 */
Controller.prototype.emitHandEvents = function(frame){
  for (var i = 0; i < frame.hands.length; i++){
    this.emit('hand', frame.hands[i]);
  }
}

Controller.prototype.setupFrameEvents = function(opts){
  if (opts.frame){
    this.on('frame', opts.frame);
  }
  if (opts.hand){
    this.on('hand', opts.hand);
  }
}

/**
  Controller events.  The old 'deviceConnected' and 'deviceDisconnected' have been deprecated -
  use 'deviceStreaming' and 'deviceStopped' instead, except in the case of an unexpected disconnect.

  There are 4 pairs of device events recently added/changed:
  -deviceAttached/deviceRemoved - called when a device's physical connection to the computer changes
  -deviceStreaming/deviceStopped - called when a device is paused or resumed.
  -streamingStarted/streamingStopped - called when there is/is no longer at least 1 streaming device.
									  Always comes after deviceStreaming.
  
  The first of all of the above event pairs is triggered as appropriate upon connection.  All of
  these events receives an argument with the most recent info about the device that triggered it.
  These events will always be fired in the order they are listed here, with reverse ordering for the
  matching shutdown call. (ie, deviceStreaming always comes after deviceAttached, and deviceStopped 
  will come before deviceRemoved).
  
  -deviceConnected/deviceDisconnected - These are considered deprecated and will be removed in
  the next revision.  In contrast to the other events and in keeping with it's original behavior,
  it will only be fired when a device begins streaming AFTER a connection has been established.
  It is not paired, and receives no device info.  Nearly identical functionality to
  streamingStarted/Stopped if you need to port.
*/
Controller.prototype.setupConnectionEvents = function() {
  var controller = this;
  this.connection.on('frame', function(frame) {
    controller.processFrame(frame);
  });
  // either deviceFrame or animationFrame:
  this.on(this.frameEventName, function(frame) {
    controller.processFinishedFrame(frame);
  });


  // here we backfill the 0.5.0 deviceEvents as best possible
  // backfill begin streaming events
  var backfillStreamingStartedEventsHandler = function(){
    if (controller.connection.opts.requestProtocolVersion < 5 && controller.streamingCount == 0){
      controller.streamingCount = 1;
      var info = {
        attached: true,
        streaming: true,
        type: 'unknown',
        id: "Lx00000000000"
      };
      controller.devices[info.id] = info;

      controller.emit('deviceAttached', info);
      controller.emit('deviceStreaming', info);
      controller.emit('streamingStarted', info);
      controller.connection.removeListener('frame', backfillStreamingStartedEventsHandler)
    }
  }

  var backfillStreamingStoppedEvents = function(){
    if (controller.streamingCount > 0) {
      for (var deviceId in controller.devices){
        controller.emit('deviceStopped', controller.devices[deviceId]);
        controller.emit('deviceRemoved', controller.devices[deviceId]);
      }
      // only emit streamingStopped once, with the last device
      controller.emit('streamingStopped', controller.devices[deviceId]);

      controller.streamingCount = 0;

      for (var deviceId in controller.devices){
        delete controller.devices[deviceId];
      }
    }
  }
  // Delegate connection events
  this.connection.on('focus', function() {

    if ( controller.loopWhileDisconnected ){

      controller.startAnimationLoop();

    }

    controller.emit('focus');

  });
  this.connection.on('blur', function() { controller.emit('blur') });
  this.connection.on('protocol', function(protocol) {

    protocol.on('beforeFrameCreated', function(frameData){
      controller.emit('beforeFrameCreated', frameData)
    });

    protocol.on('afterFrameCreated', function(frame, frameData){
      controller.emit('afterFrameCreated', frame, frameData)
    });

    controller.emit('protocol', protocol); 
  });

  this.connection.on('ready', function() {

    if (controller.checkVersion && !controller.inNode){
      // show dialog only to web users
      controller.checkOutOfDate();
    }

    controller.emit('ready');
  });

  this.connection.on('connect', function() {
    controller.emit('connect');
    controller.connection.removeListener('frame', backfillStreamingStartedEventsHandler)
    controller.connection.on('frame', backfillStreamingStartedEventsHandler);
  });

  this.connection.on('disconnect', function() {
    controller.emit('disconnect');
    backfillStreamingStoppedEvents();
  });

  // this does not fire when the controller is manually disconnected
  // or for Leap Service v1.2.0+
  this.connection.on('deviceConnect', function(evt) {
    if (evt.state){
      controller.emit('deviceConnected');
      controller.connection.removeListener('frame', backfillStreamingStartedEventsHandler)
      controller.connection.on('frame', backfillStreamingStartedEventsHandler);
    }else{
      controller.emit('deviceDisconnected');
      backfillStreamingStoppedEvents();
    }
  });

  // Does not fire for Leap Service pre v1.2.0
  this.connection.on('deviceEvent', function(evt) {
    var info = evt.state,
        oldInfo = controller.devices[info.id];

    //Grab a list of changed properties in the device info
    var changed = {};
    for(var property in info) {
      //If a property i doesn't exist the cache, or has changed...
      if( !oldInfo || !oldInfo.hasOwnProperty(property) || oldInfo[property] != info[property] ) {
        changed[property] = true;
      }
    }

    //Update the device list
    controller.devices[info.id] = info;

    //Fire events based on change list
    if(changed.attached) {
      controller.emit(info.attached ? 'deviceAttached' : 'deviceRemoved', info);
    }

    if(!changed.streaming) return;

    if(info.streaming) {
      controller.streamingCount++;
      controller.emit('deviceStreaming', info);
      if( controller.streamingCount == 1 ) {
        controller.emit('streamingStarted', info);
      }
      //if attached & streaming both change to true at the same time, that device was streaming
      //already when we connected.
      if(!changed.attached) {
        controller.emit('deviceConnected');
      }
    }
    //Since when devices are attached all fields have changed, don't send events for streaming being false.
    else if(!(changed.attached && info.attached)) {
      controller.streamingCount--;
      controller.emit('deviceStopped', info);
      if(controller.streamingCount == 0){
        controller.emit('streamingStopped', info);
      }
      controller.emit('deviceDisconnected');
    }

  });


  this.on('newListener', function(event, listener) {
    if( event == 'deviceConnected' || event == 'deviceDisconnected' ) {
      console.warn(event + " events are deprecated.  Consider using 'streamingStarted/streamingStopped' or 'deviceStreaming/deviceStopped' instead");
    }
  });

};




// Checks if the protocol version is the latest, if if not, shows the dialog.
Controller.prototype.checkOutOfDate = function(){
  console.assert(this.connection && this.connection.protocol);

  var serviceVersion = this.connection.protocol.serviceVersion;
  var protocolVersion = this.connection.protocol.version;
  var defaultProtocolVersion = this.connectionType.defaultProtocolVersion;

  if (defaultProtocolVersion > protocolVersion){

    console.warn("Your Protocol Version is v" + protocolVersion +
        ", this app was designed for v" + defaultProtocolVersion);

    Dialog.warnOutOfDate({
      sV: serviceVersion,
      pV: protocolVersion
    });
    return true
  }else{
    return false
  }

};



Controller._pluginFactories = {};

/*
 * Registers a plugin, making is accessible to controller.use later on.
 *
 * @member plugin
 * @memberof Leap.Controller.prototype
 * @param {String} name The name of the plugin (usually camelCase).
 * @param {function} factory A factory method which will return an instance of a plugin.
 * The factory receives an optional hash of options, passed in via controller.use.
 *
 * Valid keys for the object include frame, hand, finger, and pointable.  The value
 * of each key can be either a function or an object.  If given a function, that function
 * will be called once for every instance of the object, with that instance injected as an
 * argument.  This allows decoration of objects with additional data:
 *
 * ```javascript
 * Leap.Controller.plugin('testPlugin', function(options){
 *   return {
 *     frame: function(frame){
 *       frame.foo = 'bar';
 *     }
 *   }
 * });
 * ```
 *
 * When hand is used, the callback is called for every hand in `frame.hands`.  Note that
 * hand objects are recreated with every new frame, so that data saved on the hand will not
 * persist.
 *
 * ```javascript
 * Leap.Controller.plugin('testPlugin', function(){
 *   return {
 *     hand: function(hand){
 *       console.log('testPlugin running on hand ' + hand.id);
 *     }
 *   }
 * });
 * ```
 *
 * A factory can return an object to add custom functionality to Frames, Hands, or Pointables.
 * The methods are added directly to the object's prototype.  Finger cannot be used here, Pointable
 * must be used instead.
 * This is encouraged for calculations which may not be necessary on every frame.
 * Memoization is also encouraged, for cases where the method may be called many times per frame by the application.
 *
 * ```javascript
 * // This plugin allows hand.usefulData() to be called later.
 * Leap.Controller.plugin('testPlugin', function(){
 *   return {
 *     hand: {
 *       usefulData: function(){
 *         console.log('usefulData on hand', this.id);
 *         // memoize the results on to the hand, preventing repeat work:
 *         this.x || this.x = someExpensiveCalculation();
 *         return this.x;
 *       }
 *     }
 *   }
 * });
 *
 * Note that the factory pattern allows encapsulation for every plugin instance.
 *
 * ```javascript
 * Leap.Controller.plugin('testPlugin', function(options){
 *   options || options = {}
 *   options.center || options.center = [0,0,0]
 *
 *   privatePrintingMethod = function(){
 *     console.log('privatePrintingMethod - options', options);
 *   }
 *
 *   return {
 *     pointable: {
 *       publicPrintingMethod: function(){
 *         privatePrintingMethod();
 *       }
 *     }
 *   }
 * });
 *
 */
Controller.plugin = function(pluginName, factory) {
  if (this._pluginFactories[pluginName]) {
    console.warn("Plugin \"" + pluginName + "\" already registered");
  }
  return this._pluginFactories[pluginName] = factory;
};

/*
 * Returns a list of registered plugins.
 * @returns {Array} Plugin Factories.
 */
Controller.plugins = function() {
  return Object.keys(this._pluginFactories);
};



var setPluginCallbacks = function(pluginName, type, callback){
  
  if ( ['beforeFrameCreated', 'afterFrameCreated'].indexOf(type) != -1 ){
    
      // todo - not able to "unuse" a plugin currently
      this.on(type, callback);
      
    }else {
      
      if (!this.pipeline) this.pipeline = new Pipeline(this);
    
      if (!this._pluginPipelineSteps[pluginName]) this._pluginPipelineSteps[pluginName] = [];

      this._pluginPipelineSteps[pluginName].push(
        
        this.pipeline.addWrappedStep(type, callback)
        
      );
      
    }
  
};

var setPluginMethods = function(pluginName, type, hash){
  var klass;
  
  if (!this._pluginExtendedMethods[pluginName]) this._pluginExtendedMethods[pluginName] = [];

  switch (type) {
    case 'frame':
      klass = Frame;
      break;
    case 'hand':
      klass = Hand;
      break;
    case 'pointable':
      klass = Pointable;
      Object.assign(Finger.prototype, hash);
      Object.assign(Finger.Invalid,   hash);
      break;
    case 'finger':
      klass = Finger;
      break;
    default:
      throw pluginName + ' specifies invalid object type "' + type + '" for prototypical extension'
  }

  Object.assign(klass.prototype, hash);
  Object.assign(klass.Invalid, hash);
  this._pluginExtendedMethods[pluginName].push([klass, hash])
  
}



/*
 * Begin using a registered plugin.  The plugin's functionality will be added to all frames
 * returned by the controller (and/or added to the objects within the frame).
 *  - The order of plugin execution inside the loop will match the order in which use is called by the application.
 *  - The plugin be run for both deviceFrames and animationFrames.
 *
 *  If called a second time, the options will be merged with those of the already instantiated plugin.
 *
 * @method use
 * @memberOf Leap.Controller.prototype
 * @param pluginName
 * @param {Hash} Options to be passed to the plugin's factory.
 * @returns the controller
 */
Controller.prototype.use = function(pluginName, options) {
  var functionOrHash, pluginFactory, key, pluginInstance;

  pluginFactory = (typeof pluginName == 'function') ? pluginName : Controller._pluginFactories[pluginName];

  if (!pluginFactory) {
    throw 'Leap Plugin ' + pluginName + ' not found.';
  }

  options || (options = {});

  if (this.plugins[pluginName]){
    Object.assign(this.plugins[pluginName], options);
    return this;
  }

  this.plugins[pluginName] = options;

  pluginInstance = pluginFactory.call(this, options);

  for (key in pluginInstance) {

    functionOrHash = pluginInstance[key];

    if (typeof functionOrHash === 'function') {
      
      setPluginCallbacks.call(this, pluginName, key, functionOrHash);
      
    } else {
      
      setPluginMethods.call(this, pluginName, key, functionOrHash);
      
    }

  }

  return this;
};




/*
 * Stop using a used plugin.  This will remove any of the plugin's pipeline methods (those called on every frame)
 * and remove any methods which extend frame-object prototypes.
 *
 * @method stopUsing
 * @memberOf Leap.Controller.prototype
 * @param pluginName
 * @returns the controller
 */
Controller.prototype.stopUsing = function (pluginName) {
  var steps = this._pluginPipelineSteps[pluginName],
      extMethodHashes = this._pluginExtendedMethods[pluginName],
      i = 0, klass, extMethodHash;

  if (!this.plugins[pluginName]) return;

  if (steps) {
    for (i = 0; i < steps.length; i++) {
      this.pipeline.removeStep(steps[i]);
    }
  }

  if (extMethodHashes){
    for (i = 0; i < extMethodHashes.length; i++){
      klass = extMethodHashes[i][0];
      extMethodHash = extMethodHashes[i][1];
      for (var methodName in extMethodHash) {
        delete klass.prototype[methodName];
        delete klass.Invalid[methodName];
      }
    }
  }

  delete this.plugins[pluginName];

  return this;
}

Controller.prototype.useRegisteredPlugins = function(){
  for (var plugin in Controller._pluginFactories){
    this.use(plugin);
  }
}


Object.assign(Controller.prototype, EventEmitter.prototype);

}).call(this)}).call(this,require('_process'))
},{"./circular_buffer":2,"./connection/browser":4,"./connection/node":5,"./dialog":7,"./finger":8,"./frame":9,"./hand":10,"./pipeline":13,"./pointable":14,"_process":32,"events":31}],7:[function(require,module,exports){
(function (process){(function (){
var Dialog = module.exports = function(message, options){
  this.options = (options || {});
  this.message = message;

  this.createElement();
};

Dialog.prototype.createElement = function(){
  this.element = document.createElement('div');
  this.element.className = "leapjs-dialog";
  this.element.style.position = "fixed";
  this.element.style.top = '8px';
  this.element.style.left = 0;
  this.element.style.right = 0;
  this.element.style.textAlign = 'center';
  this.element.style.zIndex = 1000;

  var dialog  = document.createElement('div');
  this.element.appendChild(dialog);
  dialog.style.className = "leapjs-dialog";
  dialog.style.display = "inline-block";
  dialog.style.margin = "auto";
  dialog.style.padding = "8px";
  dialog.style.color = "#222";
  dialog.style.background = "#eee";
  dialog.style.borderRadius = "4px";
  dialog.style.border = "1px solid #999";
  dialog.style.textAlign = "left";
  dialog.style.cursor = "pointer";
  dialog.style.whiteSpace = "nowrap";
  dialog.style.transition = "box-shadow 1s linear";
  dialog.innerHTML = this.message;


  if (this.options.onclick){
    dialog.addEventListener('click', this.options.onclick);
  }

  if (this.options.onmouseover){
    dialog.addEventListener('mouseover', this.options.onmouseover);
  }

  if (this.options.onmouseout){
    dialog.addEventListener('mouseout', this.options.onmouseout);
  }

  if (this.options.onmousemove){
    dialog.addEventListener('mousemove', this.options.onmousemove);
  }
};

Dialog.prototype.show = function(){
  document.body.appendChild(this.element);
  return this;
};

Dialog.prototype.hide = function(){
  document.body.removeChild(this.element);
  return this;
};




// Shows a DOM dialog box with links to developer.leapmotion.com to upgrade
// This will work whether or not the Leap is plugged in,
// As long as it is called after a call to .connect() and the 'ready' event has fired.
Dialog.warnOutOfDate = function(params){
  params || (params = {});

  var url = "http://developer.leapmotion.com?";

  params.returnTo = window.location.href;

  for (var key in params){
    url += key + '=' + encodeURIComponent(params[key]) + '&';
  }

  var dialog,
    onclick = function(event){

       if (event.target.id != 'leapjs-decline-upgrade'){

         var popup = window.open(url,
           '_blank',
           'height=800,width=1000,location=1,menubar=1,resizable=1,status=1,toolbar=1,scrollbars=1'
         );

         if (window.focus) {popup.focus()}

       }

       dialog.hide();

       return true;
    },


    message = "This site requires Leap Motion Tracking V2." +
      "<button id='leapjs-accept-upgrade'  style='color: #444; transition: box-shadow 100ms linear; cursor: pointer; vertical-align: baseline; margin-left: 16px;'>Upgrade</button>" +
      "<button id='leapjs-decline-upgrade' style='color: #444; transition: box-shadow 100ms linear; cursor: pointer; vertical-align: baseline; margin-left: 8px; '>Not Now</button>";

  dialog = new Dialog(message, {
      onclick: onclick,
      onmousemove: function(e){
        if (e.target == document.getElementById('leapjs-decline-upgrade')){
          document.getElementById('leapjs-decline-upgrade').style.color = '#000';
          document.getElementById('leapjs-decline-upgrade').style.boxShadow = '0px 0px 2px #5daa00';

          document.getElementById('leapjs-accept-upgrade').style.color = '#444';
          document.getElementById('leapjs-accept-upgrade').style.boxShadow = 'none';
        }else{
          document.getElementById('leapjs-accept-upgrade').style.color = '#000';
          document.getElementById('leapjs-accept-upgrade').style.boxShadow = '0px 0px 2px #5daa00';

          document.getElementById('leapjs-decline-upgrade').style.color = '#444';
          document.getElementById('leapjs-decline-upgrade').style.boxShadow = 'none';
        }
      },
      onmouseout: function(){
        document.getElementById('leapjs-decline-upgrade').style.color = '#444';
        document.getElementById('leapjs-decline-upgrade').style.boxShadow = 'none';
        document.getElementById('leapjs-accept-upgrade').style.color = '#444';
        document.getElementById('leapjs-accept-upgrade').style.boxShadow = 'none';
      }
    }
  );

  return dialog.show();
};


// Tracks whether we've warned for lack of bones API.  This will be shown only for early private-beta members.
Dialog.hasWarnedBones = false;

Dialog.warnBones = function(){
  if (this.hasWarnedBones) return;
  this.hasWarnedBones = true;

  console.warn("Your Leap Service is out of date");

  if ( !(typeof(process) !== 'undefined' && process.versions && process.versions.node) ){
    this.warnOutOfDate({reason: 'bones'});
  }

}
}).call(this)}).call(this,require('_process'))
},{"_process":32}],8:[function(require,module,exports){
var Pointable = require('./pointable')
  , Bone = require('./bone')
  , Dialog = require('./dialog');

/**
* Constructs a Finger object.
*
* An uninitialized finger is considered invalid.
* Get valid Finger objects from a Frame or a Hand object.
*
* @class Finger
* @memberof Leap
* @classdesc
* The Finger class reports the physical characteristics of a finger.
*
* Both fingers are classified as Pointable objects. Use the
* Pointable.tool property to determine whether a Pointable object represents a
* tool or finger. The Leap classifies a detected entity as a tool when it is
* thinner, straighter, and longer than a typical finger.
*
* Note that Finger objects can be invalid, which means that they do not
* contain valid tracking data and do not correspond to a physical entity.
* Invalid Finger objects can be the result of asking for a Finger object
* using an ID from an earlier frame when no Finger objects with that ID
* exist in the current frame. A Finger object created from the Finger
* constructor is also invalid. Test for validity with the Pointable.valid
* property.
*/
var Finger = module.exports = function(data) {
  Pointable.call(this, data); // use pointable as super-constructor
  
  /**
  * The position of the distal interphalangeal joint of the finger.
  * This joint is closest to the tip.
  * 
  * The distal interphalangeal joint is located between the most extreme segment
  * of the finger (the distal phalanx) and the middle segment (the medial
  * phalanx).
  *
  * @member dipPosition
  * @type {number[]}
  * @memberof Leap.Finger.prototype
  */  
  this.dipPosition = data.dipPosition;

  /**
  * The position of the proximal interphalangeal joint of the finger. This joint is the middle
  * joint of a finger.
  *
  * The proximal interphalangeal joint is located between the two finger segments
  * closest to the hand (the proximal and the medial phalanges). On a thumb,
  * which lacks an medial phalanx, this joint index identifies the knuckle joint
  * between the proximal phalanx and the metacarpal bone.
  *
  * @member pipPosition
  * @type {number[]}
  * @memberof Leap.Finger.prototype
  */  
  this.pipPosition = data.pipPosition;

  /**
  * The position of the metacarpopophalangeal joint, or knuckle, of the finger.
  *
  * The metacarpopophalangeal joint is located at the base of a finger between
  * the metacarpal bone and the first phalanx. The common name for this joint is
  * the knuckle.
  *
  * On a thumb, which has one less phalanx than a finger, this joint index
  * identifies the thumb joint near the base of the hand, between the carpal
  * and metacarpal bones.
  *
  * @member mcpPosition
  * @type {number[]}
  * @memberof Leap.Finger.prototype
  */  
  this.mcpPosition = data.mcpPosition;

  /**
   * The position of the Carpometacarpal joint
   *
   * This is at the distal end of the wrist, and has no common name.
   *
   */
  this.carpPosition = data.carpPosition;

  /**
  * Whether or not this finger is in an extended posture.
  *
  * A finger is considered extended if it is extended straight from the hand as if
  * pointing. A finger is not extended when it is bent down and curled towards the 
  * palm.
  * @member extended
  * @type {Boolean}
  * @memberof Leap.Finger.prototype
  */
  this.extended = data.extended;

  /**
  * An integer code for the name of this finger.
  * 
  * * 0 -- thumb
  * * 1 -- index finger
  * * 2 -- middle finger
  * * 3 -- ring finger
  * * 4 -- pinky
  *
  * @member type
  * @type {number}
  * @memberof Leap.Finger.prototype
  */
  this.type = data.type;

  this.finger = true;
  
  /**
  * The joint positions of this finger as an array in the order base to tip.
  *
  * @member positions
  * @type {array[]}
  * @memberof Leap.Finger.prototype
  */
  this.positions = [this.carpPosition, this.mcpPosition, this.pipPosition, this.dipPosition, this.tipPosition];

  if (data.bases){
    this.addBones(data);
  } else {
    Dialog.warnBones();
  }

};

Object.assign(Finger.prototype, Pointable.prototype);


Finger.prototype.addBones = function(data){
  /**
  * Four bones per finger, from wrist outwards:
  * metacarpal, proximal, medial, and distal.
  *
  * See http://en.wikipedia.org/wiki/Interphalangeal_articulations_of_hand
  */
  this.metacarpal   = new Bone(this, {
    type: 0,
    width: this.width,
    prevJoint: this.carpPosition,
    nextJoint: this.mcpPosition,
    basis: data.bases[0]
  });

  this.proximal     = new Bone(this, {
    type: 1,
    width: this.width,
    prevJoint: this.mcpPosition,
    nextJoint: this.pipPosition,
    basis: data.bases[1]
  });

  this.medial = new Bone(this, {
    type: 2,
    width: this.width,
    prevJoint: this.pipPosition,
    nextJoint: this.dipPosition,
    basis: data.bases[2]
  });

  /**
   * Note that the `distal.nextJoint` position is slightly different from the `finger.tipPosition`.
   * The former is at the very end of the bone, where the latter is the center of a sphere positioned at
   * the tip of the finger.  The btipPosition "bone tip position" is a few mm closer to the wrist than
   * the tipPosition.
   * @type {Bone}
   */
  this.distal       = new Bone(this, {
    type: 3,
    width: this.width,
    prevJoint: this.dipPosition,
    nextJoint: data.btipPosition,
    basis: data.bases[3]
  });

  this.bones = [this.metacarpal, this.proximal, this.medial, this.distal];
};

Finger.prototype.toString = function() {
    return "Finger [ id:" + this.id + " " + this.length + "mmx | width:" + this.width + "mm | direction:" + this.direction + ' ]';
};

Finger.Invalid = { valid: false };

},{"./bone":1,"./dialog":7,"./pointable":14}],9:[function(require,module,exports){
var Hand = require("./hand")
  , Pointable = require("./pointable")
  , glMatrix = require("gl-matrix")
  , mat3 = glMatrix.mat3
  , vec3 = glMatrix.vec3
  , InteractionBox = require("./interaction_box")
  , Finger = require('./finger');

/**
 * Constructs a Frame object.
 *
 * Frame instances created with this constructor are invalid.
 * Get valid Frame objects by calling the
 * [Controller.frame]{@link Leap.Controller#frame}() function.
 *<C-D-Space>
 * @class Frame
 * @memberof Leap
 * @classdesc
 * The Frame class represents a set of hand and finger tracking data detected
 * in a single frame.
 *
 * The Leap detects hands, fingers within the tracking area, reporting
 * their positions, orientations and motions in frames at the Leap frame rate.
 *
 * Access Frame objects using the [Controller.frame]{@link Leap.Controller#frame}() function.
 */
var Frame = module.exports = function(data) {
  /**
   * Reports whether this Frame instance is valid.
   *
   * A valid Frame is one generated by the Controller object that contains
   * tracking data for all detected entities. An invalid Frame contains no
   * actual tracking data, but you can call its functions without risk of a
   * undefined object exception. The invalid Frame mechanism makes it more
   * convenient to track individual data across the frame history. For example,
   * you can invoke:
   *
   * ```javascript
   * var finger = controller.frame(n).finger(fingerID);
   * ```
   *
   * for an arbitrary Frame history value, "n", without first checking whether
   * frame(n) returned a null object. (You should still check that the
   * returned Finger instance is valid.)
   *
   * @member valid
   * @memberof Leap.Frame.prototype
   * @type {Boolean}
   */
  this.valid = true;
  /**
   * A unique ID for this Frame. Consecutive frames processed by the Leap
   * have consecutive increasing values.
   * @member id
   * @memberof Leap.Frame.prototype
   * @type {String}
   */
  this.id = data.id;
  /**
   * The frame capture time in microseconds elapsed since the Leap started.
   * @member timestamp
   * @memberof Leap.Frame.prototype
   * @type {number}
   */
  this.timestamp = data.timestamp;
  /**
   * The list of Hand objects detected in this frame, given in arbitrary order.
   * The list can be empty if no hands are detected.
   *
   * @member hands[]
   * @memberof Leap.Frame.prototype
   * @type {Leap.Hand}
   */
  this.hands = [];
  this.handsMap = {};
  /**
   * The list of Pointable objects (fingers) detected in this frame,
   * given in arbitrary order. The list can be empty if no fingers are
   * detected.
   *
   * @member pointables[]
   * @memberof Leap.Frame.prototype
   * @type {Leap.Pointable}
   */
  this.pointables = [];
  /**
   * The list of Finger objects detected in this frame, given in arbitrary order.
   * The list can be empty if no fingers are detected.
   * @member fingers[]
   * @memberof Leap.Frame.prototype
   * @type {Leap.Pointable}
   */
  this.fingers = [];

  /**
   * The InteractionBox associated with the current frame.
   *
   * @member interactionBox
   * @memberof Leap.Frame.prototype
   * @type {Leap.InteractionBox}
   */
  if (data.interactionBox) {
    this.interactionBox = new InteractionBox(data.interactionBox);
  }
  this.pointablesMap = {};
  this._translation = data.t;
  function flattenDeep(arr) {
    return Array.isArray(arr)
      ? arr.reduce(function (a, b) { return a.concat(flattenDeep(b)) }, [])
      : [arr];
  }
  this._rotation    = flattenDeep(data.r);
  this._scaleFactor = data.s;
  this.data = data;
  this.type = 'frame'; // used by event emitting
  this.currentFrameRate = data.currentFrameRate;

  this.postprocessData(data);
};

Frame.prototype.postprocessData = function(data){
  if (!data) {
    data = this.data;
  }

  for (var handIdx = 0, handCount = data.hands.length; handIdx != handCount; handIdx++) {
    var hand = new Hand(data.hands[handIdx]);
    hand.frame = this;
    this.hands.push(hand);
    this.handsMap[hand.id] = hand;
  }

  var sortBy = function(key) {
    return function (a, b) { return (a[key] > b[key]) ? 1 : ((b[key] > a[key]) ? -1 : 0) };
  };

  data.pointables.sort(sortBy("id"));

  for (var pointableIdx = 0, pointableCount = data.pointables.length; pointableIdx != pointableCount; pointableIdx++) {
    var pointableData = data.pointables[pointableIdx];
    var pointable = pointableData.dipPosition ? new Finger(pointableData) : new Pointable(pointableData);
    pointable.frame = this;
    this.addPointable(pointable);
  }
};

/**
 * Adds data from a pointable element into the pointablesMap; 
 * also adds the pointable to the frame.handsMap hand to which it belongs,
 * and to the hand's fingers map.
 * 
 * @param pointable {Object} a Pointable
 */
Frame.prototype.addPointable = function (pointable) {
  this.pointables.push(pointable);
  this.pointablesMap[pointable.id] = pointable;
  (this.fingers).push(pointable);
  if (pointable.handId !== undefined && this.handsMap.hasOwnProperty(pointable.handId)) {
    var hand = this.handsMap[pointable.handId];
    hand.pointables.push(pointable);
    (hand.fingers).push(pointable);
    switch (pointable.type){
      case 0:
        hand.thumb = pointable;
        break;
      case 1:
        hand.indexFinger = pointable;
        break;
      case 2:
        hand.middleFinger = pointable;
        break;
      case 3:
        hand.ringFinger = pointable;
        break;
      case 4:
        hand.pinky = pointable;
        break;
    }
  }
};

/**
 * The Pointable object with the specified ID in this frame.
 *
 * Use the Frame pointable() function to retrieve the Pointable object from
 * this frame using an ID value obtained from a previous frame.
 * This function always returns a Pointable object, but if no finger
 * with the specified ID is present, an invalid Pointable object is returned.
 *
 * Note that ID values persist across frames, but only until tracking of a
 * particular object is lost. If tracking of a finger is lost and subsequently
 * regained, the new Pointable object representing that finger may have
 * a different ID than that representing the finger in an earlier frame.
 *
 * @method pointable
 * @memberof Leap.Frame.prototype
 * @param {String} id The ID value of a Pointable object from a previous frame.
 * @returns {Leap.Pointable} The Pointable object with
 * the matching ID if one exists in this frame;
 * otherwise, an invalid Pointable object is returned.
 */
Frame.prototype.pointable = function(id) {
  return this.pointablesMap[id] || Pointable.Invalid;
};

/**
 * The finger with the specified ID in this frame.
 *
 * Use the Frame finger() function to retrieve the finger from
 * this frame using an ID value obtained from a previous frame.
 * This function always returns a Finger object, but if no finger
 * with the specified ID is present, an invalid Pointable object is returned.
 *
 * Note that ID values persist across frames, but only until tracking of a
 * particular object is lost. If tracking of a finger is lost and subsequently
 * regained, the new Pointable object representing that physical finger may have
 * a different ID than that representing the finger in an earlier frame.
 *
 * @method finger
 * @memberof Leap.Frame.prototype
 * @param {String} id The ID value of a finger from a previous frame.
 * @returns {Leap.Pointable} The finger with the
 * matching ID if one exists in this frame; otherwise, an invalid Pointable
 * object is returned.
 */
Frame.prototype.finger = function(id) {
  return this.pointable(id);
};

/**
 * The Hand object with the specified ID in this frame.
 *
 * Use the Frame hand() function to retrieve the Hand object from
 * this frame using an ID value obtained from a previous frame.
 * This function always returns a Hand object, but if no hand
 * with the specified ID is present, an invalid Hand object is returned.
 *
 * Note that ID values persist across frames, but only until tracking of a
 * particular object is lost. If tracking of a hand is lost and subsequently
 * regained, the new Hand object representing that physical hand may have
 * a different ID than that representing the physical hand in an earlier frame.
 *
 * @method hand
 * @memberof Leap.Frame.prototype
 * @param {String} id The ID value of a Hand object from a previous frame.
 * @returns {Leap.Hand} The Hand object with the matching
 * ID if one exists in this frame; otherwise, an invalid Hand object is returned.
 */
Frame.prototype.hand = function(id) {
  return this.handsMap[id] || Hand.Invalid;
};

/**
 * The angle of rotation around the rotation axis derived from the overall
 * rotational motion between the current frame and the specified frame.
 *
 * The returned angle is expressed in radians measured clockwise around
 * the rotation axis (using the right-hand rule) between the start and end frames.
 * The value is always between 0 and pi radians (0 and 180 degrees).
 *
 * The Leap derives frame rotation from the relative change in position and
 * orientation of all objects detected in the field of view.
 *
 * If either this frame or sinceFrame is an invalid Frame object, then the
 * angle of rotation is zero.
 *
 * @method rotationAngle
 * @memberof Leap.Frame.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative rotation.
 * @param {number[]} [axis] The axis to measure rotation around.
 * @returns {number} A positive value containing the heuristically determined
 * rotational change between the current frame and that specified in the sinceFrame parameter.
 */
Frame.prototype.rotationAngle = function(sinceFrame, axis) {
  if (!this.valid || !sinceFrame.valid) return 0.0;

  var rot = this.rotationMatrix(sinceFrame);
  var cs = (rot[0] + rot[4] + rot[8] - 1.0)*0.5;
  var angle = Math.acos(cs);
  angle = isNaN(angle) ? 0.0 : angle;

  if (axis !== undefined) {
    var rotAxis = this.rotationAxis(sinceFrame);
    angle *= vec3.dot(rotAxis, vec3.normalize(vec3.create(), axis));
  }

  return angle;
};

/**
 * The axis of rotation derived from the overall rotational motion between
 * the current frame and the specified frame.
 *
 * The returned direction vector is normalized.
 *
 * The Leap derives frame rotation from the relative change in position and
 * orientation of all objects detected in the field of view.
 *
 * If either this frame or sinceFrame is an invalid Frame object, or if no
 * rotation is detected between the two frames, a zero vector is returned.
 *
 * @method rotationAxis
 * @memberof Leap.Frame.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative rotation.
 * @returns {number[]} A normalized direction vector representing the axis of the heuristically determined
 * rotational change between the current frame and that specified in the sinceFrame parameter.
 */
Frame.prototype.rotationAxis = function(sinceFrame) {
  if (!this.valid || !sinceFrame.valid) return vec3.create();
  return vec3.normalize(vec3.create(), [
    this._rotation[7] - sinceFrame._rotation[5],
    this._rotation[2] - sinceFrame._rotation[6],
    this._rotation[3] - sinceFrame._rotation[1]
  ]);
}

/**
 * The transform matrix expressing the rotation derived from the overall
 * rotational motion between the current frame and the specified frame.
 *
 * The Leap derives frame rotation from the relative change in position and
 * orientation of all objects detected in the field of view.
 *
 * If either this frame or sinceFrame is an invalid Frame object, then
 * this method returns an identity matrix.
 *
 * @method rotationMatrix
 * @memberof Leap.Frame.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative rotation.
 * @returns {number[]} A transformation matrix containing the heuristically determined
 * rotational change between the current frame and that specified in the sinceFrame parameter.
 */
Frame.prototype.rotationMatrix = function(sinceFrame) {
  if (!this.valid || !sinceFrame.valid) return mat3.create();
  var transpose = mat3.transpose(mat3.create(), this._rotation)
  return mat3.multiply(mat3.create(), sinceFrame._rotation, transpose);
}

/**
 * The scale factor derived from the overall motion between the current frame and the specified frame.
 *
 * The scale factor is always positive. A value of 1.0 indicates no scaling took place.
 * Values between 0.0 and 1.0 indicate contraction and values greater than 1.0 indicate expansion.
 *
 * The Leap derives scaling from the relative inward or outward motion of all
 * objects detected in the field of view (independent of translation and rotation).
 *
 * If either this frame or sinceFrame is an invalid Frame object, then this method returns 1.0.
 *
 * @method scaleFactor
 * @memberof Leap.Frame.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative scaling.
 * @returns {number} A positive value representing the heuristically determined
 * scaling change ratio between the current frame and that specified in the sinceFrame parameter.
 */
Frame.prototype.scaleFactor = function(sinceFrame) {
  if (!this.valid || !sinceFrame.valid) return 1.0;
  return Math.exp(this._scaleFactor - sinceFrame._scaleFactor);
}

/**
 * The change of position derived from the overall linear motion between the
 * current frame and the specified frame.
 *
 * The returned translation vector provides the magnitude and direction of the
 * movement in millimeters.
 *
 * The Leap derives frame translation from the linear motion of all objects
 * detected in the field of view.
 *
 * If either this frame or sinceFrame is an invalid Frame object, then this
 * method returns a zero vector.
 *
 * @method translation
 * @memberof Leap.Frame.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative translation.
 * @returns {number[]} A vector representing the heuristically determined change in
 * position of all objects between the current frame and that specified in the sinceFrame parameter.
 */
Frame.prototype.translation = function(sinceFrame) {
  if (!this.valid || !sinceFrame.valid) return vec3.create();
  return vec3.subtract(vec3.create(), this._translation, sinceFrame._translation);
}

/**
 * A string containing a brief, human readable description of the Frame object.
 *
 * @method toString
 * @memberof Leap.Frame.prototype
 * @returns {String} A brief description of this frame.
 */
Frame.prototype.toString = function() {
  var str = "Frame [ id:"+this.id+" | timestamp:"+this.timestamp+" | Hand count:("+this.hands.length+") | Pointable count:("+this.pointables.length+")";
  str += " ]";
  return str;
}

/**
 * Returns a JSON-formatted string containing the hands, pointables
 * in this frame.
 *
 * @method dump
 * @memberof Leap.Frame.prototype
 * @returns {String} A JSON-formatted string.
 */
Frame.prototype.dump = function() {
  var out = '';
  out += "Frame Info:<br/>";
  out += this.toString();
  out += "<br/><br/>Hands:<br/>"
  for (var handIdx = 0, handCount = this.hands.length; handIdx != handCount; handIdx++) {
    out += "  "+ this.hands[handIdx].toString() + "<br/>";
  }
  out += "<br/><br/>Pointables:<br/>";
  for (var pointableIdx = 0, pointableCount = this.pointables.length; pointableIdx != pointableCount; pointableIdx++) {
      out += "  "+ this.pointables[pointableIdx].toString() + "<br/>";
  }
  out += "<br/><br/>Raw JSON:<br/>";
  out += JSON.stringify(this.data);
  return out;
}

/**
 * An invalid Frame object.
 *
 * You can use this invalid Frame in comparisons testing
 * whether a given Frame instance is valid or invalid. (You can also check the
 * [Frame.valid]{@link Leap.Frame#valid} property.)
 *
 * @static
 * @type {Leap.Frame}
 * @name Invalid
 * @memberof Leap.Frame
 */
Frame.Invalid = {
  valid: false,
  hands: [],
  fingers: [],
  pointables: [],
  pointable: function() { return Pointable.Invalid },
  finger: function() { return Pointable.Invalid },
  hand: function() { return Hand.Invalid },
  toString: function() { return "invalid frame" },
  dump: function() { return this.toString() },
  rotationAngle: function() { return 0.0; },
  rotationMatrix: function() { return mat3.create(); },
  rotationAxis: function() { return vec3.create(); },
  scaleFactor: function() { return 1.0; },
  translation: function() { return vec3.create(); }
};

},{"./finger":8,"./hand":10,"./interaction_box":12,"./pointable":14,"gl-matrix":21}],10:[function(require,module,exports){
var Pointable = require("./pointable")
  , Bone = require('./bone')
  , glMatrix = require("gl-matrix")
  , mat3 = glMatrix.mat3
  , vec3 = glMatrix.vec3;

/**
 * Constructs a Hand object.
 *
 * An uninitialized hand is considered invalid.
 * Get valid Hand objects from a Frame object.
 * @class Hand
 * @memberof Leap
 * @classdesc
 * The Hand class reports the physical characteristics of a detected hand.
 *
 * Hand tracking data includes a palm position and velocity; vectors for
 * the palm normal and direction to the fingers; properties of a sphere fit
 * to the hand; and lists of the attached fingers.
 *
 * Note that Hand objects can be invalid, which means that they do not contain
 * valid tracking data and do not correspond to a physical entity. Invalid Hand
 * objects can be the result of asking for a Hand object using an ID from an
 * earlier frame when no Hand objects with that ID exist in the current frame.
 * A Hand object created from the Hand constructor is also invalid.
 * Test for validity with the [Hand.valid]{@link Leap.Hand#valid} property.
 */
var Hand = module.exports = function(data) {
  /**
   * A unique ID assigned to this Hand object, whose value remains the same
   * across consecutive frames while the tracked hand remains visible. If
   * tracking is lost (for example, when a hand is occluded by another hand
   * or when it is withdrawn from or reaches the edge of the Leap field of view),
   * the Leap may assign a new ID when it detects the hand in a future frame.
   *
   * Use the ID value with the {@link Frame.hand}() function to find this
   * Hand object in future frames.
   *
   * @member id
   * @memberof Leap.Hand.prototype
   * @type {String}
   */
  this.id = data.id;
  /**
   * The center position of the palm in millimeters from the Leap origin.
   * @member palmPosition
   * @memberof Leap.Hand.prototype
   * @type {number[]}
   */
  this.palmPosition = data.palmPosition;
  /**
   * The direction from the palm position toward the fingers.
   *
   * The direction is expressed as a unit vector pointing in the same
   * direction as the directed line from the palm position to the fingers.
   *
   * @member direction
   * @memberof Leap.Hand.prototype
   * @type {number[]}
   */
  this.direction = data.direction;
  /**
   * The rate of change of the palm position in millimeters/second.
   *
   * @member palmVeclocity
   * @memberof Leap.Hand.prototype
   * @type {number[]}
   */
  this.palmVelocity = data.palmVelocity;
  /**
   * The normal vector to the palm. If your hand is flat, this vector will
   * point downward, or "out" of the front surface of your palm.
   *
   * ![Palm Vectors](images/Leap_Palm_Vectors.png)
   *
   * The direction is expressed as a unit vector pointing in the same
   * direction as the palm normal (that is, a vector orthogonal to the palm).
   * @member palmNormal
   * @memberof Leap.Hand.prototype
   * @type {number[]}
   */
  this.palmNormal = data.palmNormal;
  /**
   * The center of a sphere fit to the curvature of this hand.
   *
   * This sphere is placed roughly as if the hand were holding a ball.
   *
   * ![Hand Ball](images/Leap_Hand_Ball.png)
   * @member sphereCenter
   * @memberof Leap.Hand.prototype
   * @type {number[]}
   */
  this.sphereCenter = data.sphereCenter;
  /**
   * The radius of a sphere fit to the curvature of this hand, in millimeters.
   *
   * This sphere is placed roughly as if the hand were holding a ball. Thus the
   * size of the sphere decreases as the fingers are curled into a fist.
   *
   * @member sphereRadius
   * @memberof Leap.Hand.prototype
   * @type {number}
   */
  this.sphereRadius = data.sphereRadius;
  /**
   * Reports whether this is a valid Hand object.
   *
   * @member valid
   * @memberof Leap.Hand.prototype
   * @type {boolean}
   */
  this.valid = true;
  /**
   * The list of Pointable objects (fingers) detected in this frame
   * that are associated with this hand, given in arbitrary order. The list
   * can be empty if no fingers or tools associated with this hand are detected.
   *
   * Use the {@link Pointable} tool property to determine
   * whether or not an item in the list represents a tool or finger.
   * You can also get only the fingers using the Hand.fingers[] list.
   *
   * @member pointables[]
   * @memberof Leap.Hand.prototype
   * @type {Leap.Pointable[]}
   */
  this.pointables = [];
  /**
   * The list of fingers detected in this frame that are attached to
   * this hand, given in arbitrary order.
   *
   * The list can be empty if no fingers attached to this hand are detected.
   *
   * @member fingers[]
   * @memberof Leap.Hand.prototype
   * @type {Leap.Pointable[]}
   */
  this.fingers = [];
  
  if (data.armBasis){
    this.arm = new Bone(this, {
      type: 4,
      width: data.armWidth,
      prevJoint: data.elbow,
      nextJoint: data.wrist,
      basis: data.armBasis
    });
  }else{
    this.arm = null;
  }
  
  this._translation = data.t;
  function flattenDeep(arr) {
    return Array.isArray(arr)
      ? arr.reduce(function (a, b) { return a.concat(flattenDeep(b)) }, [])
      : [arr];
  }
  this._rotation    = flattenDeep(data.r);
  this._scaleFactor = data.s;

  /**
   * Time the hand has been visible in seconds.
   *
   * @member timeVisible
   * @memberof Leap.Hand.prototype
   * @type {number}
   */
   this.timeVisible = data.timeVisible;

  /**
   * The palm position with stabalization
   * @member stabilizedPalmPosition
   * @memberof Leap.Hand.prototype
   * @type {number[]}
   */
   this.stabilizedPalmPosition = data.stabilizedPalmPosition;

   /**
   * Reports whether this is a left or a right hand.
   *
   * @member type
   * @type {String}
   * @memberof Leap.Hand.prototype
   */
   this.type = data.type;
   this.grabStrength = data.grabStrength;
   this.pinchStrength = data.pinchStrength;
   this.confidence = data.confidence;
}

/**
 * The finger with the specified ID attached to this hand.
 *
 * Use this function to retrieve a Pointable object representing a finger
 * attached to this hand using an ID value obtained from a previous frame.
 * This function always returns a Pointable object, but if no finger
 * with the specified ID is present, an invalid Pointable object is returned.
 *
 * Note that the ID values assigned to fingers persist across frames, but only
 * until tracking of a particular finger is lost. If tracking of a finger is
 * lost and subsequently regained, the new Finger object representing that
 * finger may have a different ID than that representing the finger in an
 * earlier frame.
 *
 * @method finger
 * @memberof Leap.Hand.prototype
 * @param {String} id The ID value of a finger from a previous frame.
 * @returns {Leap.Pointable} The Finger object with
 * the matching ID if one exists for this hand in this frame; otherwise, an
 * invalid Finger object is returned.
 */
Hand.prototype.finger = function(id) {
  var finger = this.frame.finger(id);
  return (finger && (finger.handId == this.id)) ? finger : Pointable.Invalid;
}

/**
 * The angle of rotation around the rotation axis derived from the change in
 * orientation of this hand, and any associated fingers, between the
 * current frame and the specified frame.
 *
 * The returned angle is expressed in radians measured clockwise around the
 * rotation axis (using the right-hand rule) between the start and end frames.
 * The value is always between 0 and pi radians (0 and 180 degrees).
 *
 * If a corresponding Hand object is not found in sinceFrame, or if either
 * this frame or sinceFrame are invalid Frame objects, then the angle of rotation is zero.
 *
 * @method rotationAngle
 * @memberof Leap.Hand.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative rotation.
 * @param {numnber[]} [axis] The axis to measure rotation around.
 * @returns {number} A positive value representing the heuristically determined
 * rotational change of the hand between the current frame and that specified in
 * the sinceFrame parameter.
 */
Hand.prototype.rotationAngle = function(sinceFrame, axis) {
  if (!this.valid || !sinceFrame.valid) return 0.0;
  var sinceHand = sinceFrame.hand(this.id);
  if(!sinceHand.valid) return 0.0;
  var rot = this.rotationMatrix(sinceFrame);
  var cs = (rot[0] + rot[4] + rot[8] - 1.0)*0.5
  var angle = Math.acos(cs);
  angle = isNaN(angle) ? 0.0 : angle;
  if (axis !== undefined) {
    var rotAxis = this.rotationAxis(sinceFrame);
    angle *= vec3.dot(rotAxis, vec3.normalize(vec3.create(), axis));
  }
  return angle;
}

/**
 * The axis of rotation derived from the change in orientation of this hand, and
 * any associated fingers, between the current frame and the specified frame.
 *
 * The returned direction vector is normalized.
 *
 * If a corresponding Hand object is not found in sinceFrame, or if either
 * this frame or sinceFrame are invalid Frame objects, then this method returns a zero vector.
 *
 * @method rotationAxis
 * @memberof Leap.Hand.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative rotation.
 * @returns {number[]} A normalized direction Vector representing the axis of the heuristically determined
 * rotational change of the hand between the current frame and that specified in the sinceFrame parameter.
 */
Hand.prototype.rotationAxis = function(sinceFrame) {
  if (!this.valid || !sinceFrame.valid) return vec3.create();
  var sinceHand = sinceFrame.hand(this.id);
  if (!sinceHand.valid) return vec3.create();
  return vec3.normalize(vec3.create(), [
    this._rotation[7] - sinceHand._rotation[5],
    this._rotation[2] - sinceHand._rotation[6],
    this._rotation[3] - sinceHand._rotation[1]
  ]);
}

/**
 * The transform matrix expressing the rotation derived from the change in
 * orientation of this hand, and any associated fingers, between
 * the current frame and the specified frame.
 *
 * If a corresponding Hand object is not found in sinceFrame, or if either
 * this frame or sinceFrame are invalid Frame objects, then this method returns
 * an identity matrix.
 *
 * @method rotationMatrix
 * @memberof Leap.Hand.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative rotation.
 * @returns {number[]} A transformation Matrix containing the heuristically determined
 * rotational change of the hand between the current frame and that specified in the sinceFrame parameter.
 */
Hand.prototype.rotationMatrix = function(sinceFrame) {
  if (!this.valid || !sinceFrame.valid) return mat3.create();
  var sinceHand = sinceFrame.hand(this.id);
  if(!sinceHand.valid) return mat3.create();
  var transpose = mat3.transpose(mat3.create(), this._rotation);
  var m = mat3.multiply(mat3.create(), sinceHand._rotation, transpose);
  return m;
}

/**
 * The scale factor derived from the hand's motion between the current frame and the specified frame.
 *
 * The scale factor is always positive. A value of 1.0 indicates no scaling took place.
 * Values between 0.0 and 1.0 indicate contraction and values greater than 1.0 indicate expansion.
 *
 * The Leap derives scaling from the relative inward or outward motion of a hand
 * and its associated fingers (independent of translation and rotation).
 *
 * If a corresponding Hand object is not found in sinceFrame, or if either this frame or sinceFrame
 * are invalid Frame objects, then this method returns 1.0.
 *
 * @method scaleFactor
 * @memberof Leap.Hand.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative scaling.
 * @returns {number} A positive value representing the heuristically determined
 * scaling change ratio of the hand between the current frame and that specified in the sinceFrame parameter.
 */
Hand.prototype.scaleFactor = function(sinceFrame) {
  if (!this.valid || !sinceFrame.valid) return 1.0;
  var sinceHand = sinceFrame.hand(this.id);
  if(!sinceHand.valid) return 1.0;

  return Math.exp(this._scaleFactor - sinceHand._scaleFactor);
}

/**
 * The change of position of this hand between the current frame and the specified frame
 *
 * The returned translation vector provides the magnitude and direction of the
 * movement in millimeters.
 *
 * If a corresponding Hand object is not found in sinceFrame, or if either this frame or
 * sinceFrame are invalid Frame objects, then this method returns a zero vector.
 *
 * @method translation
 * @memberof Leap.Hand.prototype
 * @param {Leap.Frame} sinceFrame The starting frame for computing the relative translation.
 * @returns {number[]} A Vector representing the heuristically determined change in hand
 * position between the current frame and that specified in the sinceFrame parameter.
 */
Hand.prototype.translation = function(sinceFrame) {
  if (!this.valid || !sinceFrame.valid) return vec3.create();
  var sinceHand = sinceFrame.hand(this.id);
  if(!sinceHand.valid) return vec3.create();
  return [
    this._translation[0] - sinceHand._translation[0],
    this._translation[1] - sinceHand._translation[1],
    this._translation[2] - sinceHand._translation[2]
  ];
}

/**
 * A string containing a brief, human readable description of the Hand object.
 * @method toString
 * @memberof Leap.Hand.prototype
 * @returns {String} A description of the Hand as a string.
 */
Hand.prototype.toString = function() {
  return "Hand (" + this.type + ") [ id: "+ this.id + " | palm velocity:"+this.palmVelocity+" | sphere center:"+this.sphereCenter+" ] ";
}

/**
 * The pitch angle in radians.
 *
 * Pitch is the angle between the negative z-axis and the projection of
 * the vector onto the y-z plane. In other words, pitch represents rotation
 * around the x-axis.
 * If the vector points upward, the returned angle is between 0 and pi radians
 * (180 degrees); if it points downward, the angle is between 0 and -pi radians.
 *
 * @method pitch
 * @memberof Leap.Hand.prototype
 * @returns {number} The angle of this vector above or below the horizon (x-z plane).
 *
 */
Hand.prototype.pitch = function() {
  return Math.atan2(this.direction[1], -this.direction[2]);
}

/**
 *  The yaw angle in radians.
 *
 * Yaw is the angle between the negative z-axis and the projection of
 * the vector onto the x-z plane. In other words, yaw represents rotation
 * around the y-axis. If the vector points to the right of the negative z-axis,
 * then the returned angle is between 0 and pi radians (180 degrees);
 * if it points to the left, the angle is between 0 and -pi radians.
 *
 * @method yaw
 * @memberof Leap.Hand.prototype
 * @returns {number} The angle of this vector to the right or left of the y-axis.
 *
 */
Hand.prototype.yaw = function() {
  return Math.atan2(this.direction[0], -this.direction[2]);
}

/**
 *  The roll angle in radians.
 *
 * Roll is the angle between the y-axis and the projection of
 * the vector onto the x-y plane. In other words, roll represents rotation
 * around the z-axis. If the vector points to the left of the y-axis,
 * then the returned angle is between 0 and pi radians (180 degrees);
 * if it points to the right, the angle is between 0 and -pi radians.
 *
 * @method roll
 * @memberof Leap.Hand.prototype
 * @returns {number} The angle of this vector to the right or left of the y-axis.
 *
 */
Hand.prototype.roll = function() {
  return Math.atan2(this.palmNormal[0], -this.palmNormal[1]);
}

/**
 * An invalid Hand object.
 *
 * You can use an invalid Hand object in comparisons testing
 * whether a given Hand instance is valid or invalid. (You can also use the
 * Hand valid property.)
 *
 * @static
 * @type {Leap.Hand}
 * @name Invalid
 * @memberof Leap.Hand
 */
Hand.Invalid = {
  valid: false,
  fingers: [],
  pointables: [],
  left: false,
  pointable: function() { return Pointable.Invalid },
  finger: function() { return Pointable.Invalid },
  toString: function() { return "invalid frame" },
  dump: function() { return this.toString(); },
  rotationAngle: function() { return 0.0; },
  rotationMatrix: function() { return mat3.create(); },
  rotationAxis: function() { return vec3.create(); },
  scaleFactor: function() { return 1.0; },
  translation: function() { return vec3.create(); }
};

},{"./bone":1,"./pointable":14,"gl-matrix":21}],11:[function(require,module,exports){
/**
 * Leap is the global namespace of the Leap API.
 * @namespace Leap
 */
module.exports = {
  Controller: require("./controller"),
  Frame: require("./frame"),
  Hand: require("./hand"),
  Pointable: require("./pointable"),
  Finger: require("./finger"),
  InteractionBox: require("./interaction_box"),
  CircularBuffer: require("./circular_buffer"),
  UI: require("./ui"),
  JSONProtocol: require("./protocol").JSONProtocol,
  glMatrix: require("gl-matrix"),
  mat3: require("gl-matrix").mat3,
  vec3: require("gl-matrix").vec3,
  loopController: undefined,
  version: require('./version.js'),

  /**
   * Expose utility libraries for convenience
   * Use carefully - they may be subject to upgrade or removal in different versions of LeapJS.
   */
  EventEmitter: require('events').EventEmitter,

  /**
   * The Leap.loop() function passes a frame of Leap data to your
   * callback function and then calls window.requestAnimationFrame() after
   * executing your callback function.
   *
   * Leap.loop() sets up the Leap controller and WebSocket connection for you.
   * You do not need to create your own controller when using this method.
   *
   * Your callback function is called on an interval determined by the client
   * browser. Typically, this is on an interval of 60 frames/second. The most
   * recent frame of Leap data is passed to your callback function. If the Leap
   * is producing frames at a slower rate than the browser frame rate, the same
   * frame of Leap data can be passed to your function in successive animation
   * updates.
   *
   * As an alternative, you can create your own Controller object and use a
   * {@link Controller#onFrame onFrame} callback to process the data at
   * the frame rate of the Leap device. See {@link Controller} for an
   * example.
   *
   * @method Leap.loop
   * @param {function} callback A function called when the browser is ready to
   * draw to the screen. The most recent {@link Frame} object is passed to
   * your callback function.
   *
   * ```javascript
   *    Leap.loop( function( frame ) {
   *        // ... your code here
   *    })
   * ```
   */
  loop: function(opts, callback) {
    if (opts && callback === undefined &&  ( ({}).toString.call(opts) === '[object Function]' ) ) {
      callback = opts;
      opts = {};
    }

    if (this.loopController) {
      if (opts){
        this.loopController.setupFrameEvents(opts);
      }
    }else{
      this.loopController = new this.Controller(opts);
    }

    this.loopController.loop(callback);
    return this.loopController;
  },

  /*
   * Convenience method for Leap.Controller.plugin
   */
  plugin: function(name, options){
    this.Controller.plugin(name, options)
  }
}

},{"./circular_buffer":2,"./controller":6,"./finger":8,"./frame":9,"./hand":10,"./interaction_box":12,"./pointable":14,"./protocol":15,"./ui":16,"./version.js":19,"events":31,"gl-matrix":21}],12:[function(require,module,exports){
var glMatrix = require("gl-matrix")
  , vec3 = glMatrix.vec3;

/**
 * Constructs a InteractionBox object.
 *
 * @class InteractionBox
 * @memberof Leap
 * @classdesc
 * The InteractionBox class represents a box-shaped region completely within
 * the field of view of the Leap Motion controller.
 *
 * The interaction box is an axis-aligned rectangular prism and provides
 * normalized coordinates for hands, fingers, and tools within this box.
 * The InteractionBox class can make it easier to map positions in the
 * Leap Motion coordinate system to 2D or 3D coordinate systems used
 * for application drawing.
 *
 * ![Interaction Box](images/Leap_InteractionBox.png)
 *
 * The InteractionBox region is defined by a center and dimensions along the x, y, and z axes.
 */
var InteractionBox = module.exports = function(data) {
  /**
   * Indicates whether this is a valid InteractionBox object.
   *
   * @member valid
   * @type {Boolean}
   * @memberof Leap.InteractionBox.prototype
   */
  this.valid = true;
  /**
   * The center of the InteractionBox in device coordinates (millimeters).
   * This point is equidistant from all sides of the box.
   *
   * @member center
   * @type {number[]}
   * @memberof Leap.InteractionBox.prototype
   */
  this.center = data.center;

  this.size = data.size;
  /**
   * The width of the InteractionBox in millimeters, measured along the x-axis.
   *
   * @member width
   * @type {number}
   * @memberof Leap.InteractionBox.prototype
   */
  this.width = data.size[0];
  /**
   * The height of the InteractionBox in millimeters, measured along the y-axis.
   *
   * @member height
   * @type {number}
   * @memberof Leap.InteractionBox.prototype
   */
  this.height = data.size[1];
  /**
   * The depth of the InteractionBox in millimeters, measured along the z-axis.
   *
   * @member depth
   * @type {number}
   * @memberof Leap.InteractionBox.prototype
   */
  this.depth = data.size[2];
}

/**
 * Converts a position defined by normalized InteractionBox coordinates
 * into device coordinates in millimeters.
 *
 * This function performs the inverse of normalizePoint().
 *
 * @method denormalizePoint
 * @memberof Leap.InteractionBox.prototype
 * @param {number[]} normalizedPosition The input position in InteractionBox coordinates.
 * @returns {number[]} The corresponding denormalized position in device coordinates.
 */
InteractionBox.prototype.denormalizePoint = function(normalizedPosition) {
  return vec3.fromValues(
    (normalizedPosition[0] - 0.5) * this.size[0] + this.center[0],
    (normalizedPosition[1] - 0.5) * this.size[1] + this.center[1],
    (normalizedPosition[2] - 0.5) * this.size[2] + this.center[2]
  );
}

/**
 * Normalizes the coordinates of a point using the interaction box.
 *
 * Coordinates from the Leap Motion frame of reference (millimeters) are
 * converted to a range of [0..1] such that the minimum value of the
 * InteractionBox maps to 0 and the maximum value of the InteractionBox maps to 1.
 *
 * @method normalizePoint
 * @memberof Leap.InteractionBox.prototype
 * @param {number[]} position The input position in device coordinates.
 * @param {Boolean} clamp Whether or not to limit the output value to the range [0,1]
 * when the input position is outside the InteractionBox. Defaults to true.
 * @returns {number[]} The normalized position.
 */
InteractionBox.prototype.normalizePoint = function(position, clamp) {
  var vec = vec3.fromValues(
    ((position[0] - this.center[0]) / this.size[0]) + 0.5,
    ((position[1] - this.center[1]) / this.size[1]) + 0.5,
    ((position[2] - this.center[2]) / this.size[2]) + 0.5
  );

  if (clamp) {
    vec[0] = Math.min(Math.max(vec[0], 0), 1);
    vec[1] = Math.min(Math.max(vec[1], 0), 1);
    vec[2] = Math.min(Math.max(vec[2], 0), 1);
  }
  return vec;
}

/**
 * Writes a brief, human readable description of the InteractionBox object.
 *
 * @method toString
 * @memberof Leap.InteractionBox.prototype
 * @returns {String} A description of the InteractionBox object as a string.
 */
InteractionBox.prototype.toString = function() {
  return "InteractionBox [ width:" + this.width + " | height:" + this.height + " | depth:" + this.depth + " ]";
}

/**
 * An invalid InteractionBox object.
 *
 * You can use this InteractionBox instance in comparisons testing
 * whether a given InteractionBox instance is valid or invalid. (You can also use the
 * InteractionBox.valid property.)
 *
 * @static
 * @type {Leap.InteractionBox}
 * @name Invalid
 * @memberof Leap.InteractionBox
 */
InteractionBox.Invalid = { valid: false };

},{"gl-matrix":21}],13:[function(require,module,exports){
var Pipeline = module.exports = function (controller) {
  this.steps = [];
  this.controller = controller;
}

Pipeline.prototype.addStep = function (step) {
  this.steps.push(step);
}

Pipeline.prototype.run = function (frame) {
  var stepsLength = this.steps.length;
  for (var i = 0; i != stepsLength; i++) {
    if (!frame) break;
    frame = this.steps[i](frame);
  }
  return frame;
}

Pipeline.prototype.removeStep = function(step){
  var index = this.steps.indexOf(step);
  if (index === -1) throw "Step not found in pipeline";
  this.steps.splice(index, 1);
}

/*
 * Wraps a plugin callback method in method which can be run inside the pipeline.
 * This wrapper method loops the callback over objects within the frame as is appropriate,
 * calling the callback for each in turn.
 *
 * @method createStepFunction
 * @memberOf Leap.Controller.prototype
 * @param {Controller} The controller on which the callback is called.
 * @param {String} type What frame object the callback is run for and receives.
 *       Can be one of 'frame', 'finger', 'hand', 'pointable'
 * @param {function} callback The method which will be run inside the pipeline loop.  Receives one argument, such as a hand.
 * @private
 */
Pipeline.prototype.addWrappedStep = function (type, callback) {
  var controller = this.controller,
    step = function (frame) {
      var dependencies, i, len;
      dependencies = (type == 'frame') ? [frame] : (frame[type + 's'] || []);

      for (i = 0, len = dependencies.length; i < len; i++) {
        callback.call(controller, dependencies[i]);
      }

      return frame;
    };

  this.addStep(step);
  return step;
};
},{}],14:[function(require,module,exports){
var glMatrix = require("gl-matrix")
  , vec3 = glMatrix.vec3;

/**
 * Constructs a Pointable object.
 *
 * An uninitialized pointable is considered invalid.
 * Get valid Pointable objects from a Frame or a Hand object.
 *
 * @class Pointable
 * @memberof Leap
 * @classdesc
 * The Pointable class reports the physical characteristics of a detected
 * finger or tool.
 *
 * Both fingers and tools are classified as Pointable objects. Use the
 * Pointable.tool property to determine whether a Pointable object represents a
 * tool or finger. The Leap classifies a detected entity as a tool when it is
 * thinner, straighter, and longer than a typical finger.
 *
 * Note that Pointable objects can be invalid, which means that they do not
 * contain valid tracking data and do not correspond to a physical entity.
 * Invalid Pointable objects can be the result of asking for a Pointable object
 * using an ID from an earlier frame when no Pointable objects with that ID
 * exist in the current frame. A Pointable object created from the Pointable
 * constructor is also invalid. Test for validity with the Pointable.valid
 * property.
 */
var Pointable = module.exports = function(data) {
  /**
   * Indicates whether this is a valid Pointable object.
   *
   * @member valid
   * @type {Boolean}
   * @memberof Leap.Pointable.prototype
   */
  this.valid = true;
  /**
   * A unique ID assigned to this Pointable object, whose value remains the
   * same across consecutive frames while the tracked finger or tool remains
   * visible. If tracking is lost (for example, when a finger is occluded by
   * another finger or when it is withdrawn from the Leap field of view), the
   * Leap may assign a new ID when it detects the entity in a future frame.
   *
   * Use the ID value with the pointable() functions defined for the
   * {@link Frame} and {@link Frame.Hand} classes to find this
   * Pointable object in future frames.
   *
   * @member id
   * @type {String}
   * @memberof Leap.Pointable.prototype
   */
  this.id = data.id;
  this.handId = data.handId;
  /**
   * The estimated length of the finger or tool in millimeters.
   *
   * The reported length is the visible length of the finger or tool from the
   * hand to tip. If the length isn't known, then a value of 0 is returned.
   *
   * @member length
   * @type {number}
   * @memberof Leap.Pointable.prototype
   */
  this.length = data.length;
  /**
   * Whether or not the Pointable is believed to be a tool.
   * Tools are generally longer, thinner, and straighter than fingers.
   *
   * If tool is false, then this Pointable must be a finger.
   *
   * @member tool
   * @type {Boolean}
   * @memberof Leap.Pointable.prototype
   */
  this.tool = data.tool;
  /**
   * The estimated width of the tool in millimeters.
   *
   * The reported width is the average width of the visible portion of the
   * tool from the hand to the tip. If the width isn't known,
   * then a value of 0 is returned.
   *
   * Pointable objects representing fingers do not have a width property.
   *
   * @member width
   * @type {number}
   * @memberof Leap.Pointable.prototype
   */
  this.width = data.width;
  /**
   * The direction in which this finger or tool is pointing.
   *
   * The direction is expressed as a unit vector pointing in the same
   * direction as the tip.
   *
   * ![Finger](images/Leap_Finger_Model.png)
   * @member direction
   * @type {number[]}
   * @memberof Leap.Pointable.prototype
   */
  this.direction = data.direction;
  /**
   * The tip position in millimeters from the Leap origin.
   * Stabilized
   *
   * @member stabilizedTipPosition
   * @type {number[]}
   * @memberof Leap.Pointable.prototype
   */
  this.stabilizedTipPosition = data.stabilizedTipPosition;
  /**
   * The tip position in millimeters from the Leap origin.
   *
   * @member tipPosition
   * @type {number[]}
   * @memberof Leap.Pointable.prototype
   */
  this.tipPosition = data.tipPosition;
  /**
   * The rate of change of the tip position in millimeters/second.
   *
   * @member tipVelocity
   * @type {number[]}
   * @memberof Leap.Pointable.prototype
   */
  this.tipVelocity = data.tipVelocity;
  /**
   * The current touch zone of this Pointable object.
   *
   * The Leap Motion software computes the touch zone based on a floating touch
   * plane that adapts to the user's finger movement and hand posture. The Leap
   * Motion software interprets purposeful movements toward this plane as potential touch
   * points. When a Pointable moves close to the adaptive touch plane, it enters the
   * "hovering" zone. When a Pointable reaches or passes through the plane, it enters
   * the "touching" zone.
   *
   * The possible states include:
   *
   * * "none" -- The Pointable is outside the hovering zone.
   * * "hovering" -- The Pointable is close to, but not touching the touch plane.
   * * "touching" -- The Pointable has penetrated the touch plane.
   *
   * The touchDistance value provides a normalized indication of the distance to
   * the touch plane when the Pointable is in the hovering or touching zones.
   *
   * @member touchZone
   * @type {String}
   * @memberof Leap.Pointable.prototype
   */
  this.touchZone = data.touchZone;
  /**
   * A value proportional to the distance between this Pointable object and the
   * adaptive touch plane.
   *
   * ![Touch Distance](images/Leap_Touch_Plane.png)
   *
   * The touch distance is a value in the range [-1, 1]. The value 1.0 indicates the
   * Pointable is at the far edge of the hovering zone. The value 0 indicates the
   * Pointable is just entering the touching zone. A value of -1.0 indicates the
   * Pointable is firmly within the touching zone. Values in between are
   * proportional to the distance from the plane. Thus, the touchDistance of 0.5
   * indicates that the Pointable is halfway into the hovering zone.
   *
   * You can use the touchDistance value to modulate visual feedback given to the
   * user as their fingers close in on a touch target, such as a button.
   *
   * @member touchDistance
   * @type {number}
   * @memberof Leap.Pointable.prototype
   */
  this.touchDistance = data.touchDistance;

  /**
   * How long the pointable has been visible in seconds.
   *
   * @member timeVisible
   * @type {number}
   * @memberof Leap.Pointable.prototype
   */
  this.timeVisible = data.timeVisible;
}

/**
 * A string containing a brief, human readable description of the Pointable
 * object.
 *
 * @method toString
 * @memberof Leap.Pointable.prototype
 * @returns {String} A description of the Pointable object as a string.
 */
Pointable.prototype.toString = function() {
  return "Pointable [ id:" + this.id + " " + this.length + "mmx | width:" + this.width + "mm | direction:" + this.direction + ' ]';
}

/**
 * Returns the hand which the pointable is attached to.
 */
Pointable.prototype.hand = function(){
  return this.frame.hand(this.handId);
}

/**
 * An invalid Pointable object.
 *
 * You can use this Pointable instance in comparisons testing
 * whether a given Pointable instance is valid or invalid. (You can also use the
 * Pointable.valid property.)

 * @static
 * @type {Leap.Pointable}
 * @name Invalid
 * @memberof Leap.Pointable
 */
Pointable.Invalid = { valid: false };

},{"gl-matrix":21}],15:[function(require,module,exports){
var Frame = require('./frame')
  , EventEmitter = require('events').EventEmitter;

var Event = function(data) {
  this.type = data.type;
  this.state = data.state;
};

exports.chooseProtocol = function(header) {
  var protocol;
  switch(header.version) {
    case 1:
    case 2:
    case 3:
    case 4:
    case 5:
    case 6:
      protocol = JSONProtocol(header);
      protocol.sendBackground = function(connection, state) {
        connection.send(protocol.encode({background: state}));
      }
      protocol.sendFocused = function(connection, state) {
        connection.send(protocol.encode({focused: state}));
      }
      protocol.sendOptimizeHMD = function(connection, state) {
        connection.send(protocol.encode({optimizeHMD: state}));
      }
      protocol.sendOptimizeScreentop = function(connection, state) {
        connection.send(protocol.encode({optimizeScreentop: state}));
      }
      break;
    default:
      throw "unrecognized version";
  }
  return protocol;
}

var JSONProtocol = exports.JSONProtocol = function(header) {

  var protocol = function(frameData) {

    if (frameData.event) {

      return new Event(frameData.event);

    } else {

      protocol.emit('beforeFrameCreated', frameData);

      var frame = new Frame(frameData);

      protocol.emit('afterFrameCreated', frame, frameData);

      return frame;

    }

  };

  protocol.encode = function(message) {
    return JSON.stringify(message);
  };
  protocol.version = header.version;
  protocol.serviceVersion = header.serviceVersion;
  protocol.versionLong = 'Version ' + header.version;
  protocol.type = 'protocol';

  Object.assign(protocol, EventEmitter.prototype);

  return protocol;
};



},{"./frame":9,"events":31}],16:[function(require,module,exports){
exports.UI = {
  Region: require("./ui/region"),
  Cursor: require("./ui/cursor")
};
},{"./ui/cursor":17,"./ui/region":18}],17:[function(require,module,exports){
var Cursor = module.exports = function() {
  return function(frame) {
    var pointable = frame.pointables.sort(function(a, b) { return a.z - b.z })[0]
    if (pointable && pointable.valid) {
      frame.cursorPosition = pointable.tipPosition
    }
    return frame
  }
}

},{}],18:[function(require,module,exports){
var EventEmitter = require('events').EventEmitter;

var Region = module.exports = function(start, end) {
  this.start = new Vector(start)
  this.end = new Vector(end)
  this.enteredFrame = null
}

Region.prototype.hasPointables = function(frame) {
  for (var i = 0; i != frame.pointables.length; i++) {
    var position = frame.pointables[i].tipPosition
    if (position.x >= this.start.x && position.x <= this.end.x && position.y >= this.start.y && position.y <= this.end.y && position.z >= this.start.z && position.z <= this.end.z) {
      return true
    }
  }
  return false
}

Region.prototype.listener = function(opts) {
  var region = this
  if (opts && opts.nearThreshold) this.setupNearRegion(opts.nearThreshold)
  return function(frame) {
    return region.updatePosition(frame)
  }
}

Region.prototype.clipper = function() {
  var region = this
  return function(frame) {
    region.updatePosition(frame)
    return region.enteredFrame ? frame : null
  }
}

Region.prototype.setupNearRegion = function(distance) {
  var nearRegion = this.nearRegion = new Region(
    [this.start.x - distance, this.start.y - distance, this.start.z - distance],
    [this.end.x + distance, this.end.y + distance, this.end.z + distance]
  )
  var region = this
  nearRegion.on("enter", function(frame) {
    region.emit("near", frame)
  })
  nearRegion.on("exit", function(frame) {
    region.emit("far", frame)
  })
  region.on('exit', function(frame) {
    region.emit("near", frame)
  })
}

Region.prototype.updatePosition = function(frame) {
  if (this.nearRegion) this.nearRegion.updatePosition(frame)
  if (this.hasPointables(frame) && this.enteredFrame == null) {
    this.enteredFrame = frame
    this.emit("enter", this.enteredFrame)
  } else if (!this.hasPointables(frame) && this.enteredFrame != null) {
    this.enteredFrame = null
    this.emit("exit", this.enteredFrame)
  }
  return frame
}

Region.prototype.normalize = function(position) {
  return new Vector([
    (position.x - this.start.x) / (this.end.x - this.start.x),
    (position.y - this.start.y) / (this.end.y - this.start.y),
    (position.z - this.start.z) / (this.end.z - this.start.z)
  ])
}

Region.prototype.mapToXY = function(position, width, height) {
  var normalized = this.normalize(position)
  var x = normalized.x, y = normalized.y
  if (x > 1) x = 1
  else if (x < -1) x = -1
  if (y > 1) y = 1
  else if (y < -1) y = -1
  return [
    (x + 1) / 2 * width,
    (1 - y) / 2 * height,
    normalized.z
  ]
}

Object.assign(Region.prototype, EventEmitter.prototype)
},{"events":31}],19:[function(require,module,exports){
// This file is automatically updated from package.json by grunt.
module.exports = {
  full: '1.1.1',
  major: 1,
  minor: 1,
  dot: 1
}
},{}],20:[function(require,module,exports){
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.setMatrixArrayType = setMatrixArrayType;
exports.toRadian = toRadian;
exports.equals = equals;
exports.RANDOM = exports.ARRAY_TYPE = exports.EPSILON = void 0;

/**
 * Common utilities
 * @module glMatrix
 */
// Configuration Constants
var EPSILON = 0.000001;
exports.EPSILON = EPSILON;
var ARRAY_TYPE = typeof Float32Array !== 'undefined' ? Float32Array : Array;
exports.ARRAY_TYPE = ARRAY_TYPE;
var RANDOM = Math.random;
/**
 * Sets the type of array used when creating new vectors and matrices
 *
 * @param {Float32ArrayConstructor | ArrayConstructor} type Array type, such as Float32Array or Array
 */

exports.RANDOM = RANDOM;

function setMatrixArrayType(type) {
  exports.ARRAY_TYPE = ARRAY_TYPE = type;
}

var degree = Math.PI / 180;
/**
 * Convert Degree To Radian
 *
 * @param {Number} a Angle in Degrees
 */

function toRadian(a) {
  return a * degree;
}
/**
 * Tests whether or not the arguments have approximately the same value, within an absolute
 * or relative tolerance of glMatrix.EPSILON (an absolute tolerance is used for values less
 * than or equal to 1.0, and a relative tolerance is used for larger values)
 *
 * @param {Number} a The first number to test.
 * @param {Number} b The second number to test.
 * @returns {Boolean} True if the numbers are approximately equal, false otherwise.
 */


function equals(a, b) {
  return Math.abs(a - b) <= EPSILON * Math.max(1.0, Math.abs(a), Math.abs(b));
}

if (!Math.hypot) Math.hypot = function () {
  var y = 0,
      i = arguments.length;

  while (i--) {
    y += arguments[i] * arguments[i];
  }

  return Math.sqrt(y);
};
},{}],21:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.vec4 = exports.vec3 = exports.vec2 = exports.quat2 = exports.quat = exports.mat4 = exports.mat3 = exports.mat2d = exports.mat2 = exports.glMatrix = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

exports.glMatrix = glMatrix;

var mat2 = _interopRequireWildcard(require("./mat2.js"));

exports.mat2 = mat2;

var mat2d = _interopRequireWildcard(require("./mat2d.js"));

exports.mat2d = mat2d;

var mat3 = _interopRequireWildcard(require("./mat3.js"));

exports.mat3 = mat3;

var mat4 = _interopRequireWildcard(require("./mat4.js"));

exports.mat4 = mat4;

var quat = _interopRequireWildcard(require("./quat.js"));

exports.quat = quat;

var quat2 = _interopRequireWildcard(require("./quat2.js"));

exports.quat2 = quat2;

var vec2 = _interopRequireWildcard(require("./vec2.js"));

exports.vec2 = vec2;

var vec3 = _interopRequireWildcard(require("./vec3.js"));

exports.vec3 = vec3;

var vec4 = _interopRequireWildcard(require("./vec4.js"));

exports.vec4 = vec4;

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
},{"./common.js":20,"./mat2.js":22,"./mat2d.js":23,"./mat3.js":24,"./mat4.js":25,"./quat.js":26,"./quat2.js":27,"./vec2.js":28,"./vec3.js":29,"./vec4.js":30}],22:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.clone = clone;
exports.copy = copy;
exports.identity = identity;
exports.fromValues = fromValues;
exports.set = set;
exports.transpose = transpose;
exports.invert = invert;
exports.adjoint = adjoint;
exports.determinant = determinant;
exports.multiply = multiply;
exports.rotate = rotate;
exports.scale = scale;
exports.fromRotation = fromRotation;
exports.fromScaling = fromScaling;
exports.str = str;
exports.frob = frob;
exports.LDU = LDU;
exports.add = add;
exports.subtract = subtract;
exports.exactEquals = exactEquals;
exports.equals = equals;
exports.multiplyScalar = multiplyScalar;
exports.multiplyScalarAndAdd = multiplyScalarAndAdd;
exports.sub = exports.mul = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * 2x2 Matrix
 * @module mat2
 */

/**
 * Creates a new identity mat2
 *
 * @returns {mat2} a new 2x2 matrix
 */
function create() {
  var out = new glMatrix.ARRAY_TYPE(4);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    out[1] = 0;
    out[2] = 0;
  }

  out[0] = 1;
  out[3] = 1;
  return out;
}
/**
 * Creates a new mat2 initialized with values from an existing matrix
 *
 * @param {ReadonlyMat2} a matrix to clone
 * @returns {mat2} a new 2x2 matrix
 */


function clone(a) {
  var out = new glMatrix.ARRAY_TYPE(4);
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  return out;
}
/**
 * Copy the values from one mat2 to another
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the source matrix
 * @returns {mat2} out
 */


function copy(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  return out;
}
/**
 * Set a mat2 to the identity matrix
 *
 * @param {mat2} out the receiving matrix
 * @returns {mat2} out
 */


function identity(out) {
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  return out;
}
/**
 * Create a new mat2 with the given values
 *
 * @param {Number} m00 Component in column 0, row 0 position (index 0)
 * @param {Number} m01 Component in column 0, row 1 position (index 1)
 * @param {Number} m10 Component in column 1, row 0 position (index 2)
 * @param {Number} m11 Component in column 1, row 1 position (index 3)
 * @returns {mat2} out A new 2x2 matrix
 */


function fromValues(m00, m01, m10, m11) {
  var out = new glMatrix.ARRAY_TYPE(4);
  out[0] = m00;
  out[1] = m01;
  out[2] = m10;
  out[3] = m11;
  return out;
}
/**
 * Set the components of a mat2 to the given values
 *
 * @param {mat2} out the receiving matrix
 * @param {Number} m00 Component in column 0, row 0 position (index 0)
 * @param {Number} m01 Component in column 0, row 1 position (index 1)
 * @param {Number} m10 Component in column 1, row 0 position (index 2)
 * @param {Number} m11 Component in column 1, row 1 position (index 3)
 * @returns {mat2} out
 */


function set(out, m00, m01, m10, m11) {
  out[0] = m00;
  out[1] = m01;
  out[2] = m10;
  out[3] = m11;
  return out;
}
/**
 * Transpose the values of a mat2
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the source matrix
 * @returns {mat2} out
 */


function transpose(out, a) {
  // If we are transposing ourselves we can skip a few steps but have to cache
  // some values
  if (out === a) {
    var a1 = a[1];
    out[1] = a[2];
    out[2] = a1;
  } else {
    out[0] = a[0];
    out[1] = a[2];
    out[2] = a[1];
    out[3] = a[3];
  }

  return out;
}
/**
 * Inverts a mat2
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the source matrix
 * @returns {mat2} out
 */


function invert(out, a) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3]; // Calculate the determinant

  var det = a0 * a3 - a2 * a1;

  if (!det) {
    return null;
  }

  det = 1.0 / det;
  out[0] = a3 * det;
  out[1] = -a1 * det;
  out[2] = -a2 * det;
  out[3] = a0 * det;
  return out;
}
/**
 * Calculates the adjugate of a mat2
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the source matrix
 * @returns {mat2} out
 */


function adjoint(out, a) {
  // Caching this value is nessecary if out == a
  var a0 = a[0];
  out[0] = a[3];
  out[1] = -a[1];
  out[2] = -a[2];
  out[3] = a0;
  return out;
}
/**
 * Calculates the determinant of a mat2
 *
 * @param {ReadonlyMat2} a the source matrix
 * @returns {Number} determinant of a
 */


function determinant(a) {
  return a[0] * a[3] - a[2] * a[1];
}
/**
 * Multiplies two mat2's
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the first operand
 * @param {ReadonlyMat2} b the second operand
 * @returns {mat2} out
 */


function multiply(out, a, b) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3];
  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3];
  out[0] = a0 * b0 + a2 * b1;
  out[1] = a1 * b0 + a3 * b1;
  out[2] = a0 * b2 + a2 * b3;
  out[3] = a1 * b2 + a3 * b3;
  return out;
}
/**
 * Rotates a mat2 by the given angle
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat2} out
 */


function rotate(out, a, rad) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3];
  var s = Math.sin(rad);
  var c = Math.cos(rad);
  out[0] = a0 * c + a2 * s;
  out[1] = a1 * c + a3 * s;
  out[2] = a0 * -s + a2 * c;
  out[3] = a1 * -s + a3 * c;
  return out;
}
/**
 * Scales the mat2 by the dimensions in the given vec2
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the matrix to rotate
 * @param {ReadonlyVec2} v the vec2 to scale the matrix by
 * @returns {mat2} out
 **/


function scale(out, a, v) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3];
  var v0 = v[0],
      v1 = v[1];
  out[0] = a0 * v0;
  out[1] = a1 * v0;
  out[2] = a2 * v1;
  out[3] = a3 * v1;
  return out;
}
/**
 * Creates a matrix from a given angle
 * This is equivalent to (but much faster than):
 *
 *     mat2.identity(dest);
 *     mat2.rotate(dest, dest, rad);
 *
 * @param {mat2} out mat2 receiving operation result
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat2} out
 */


function fromRotation(out, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad);
  out[0] = c;
  out[1] = s;
  out[2] = -s;
  out[3] = c;
  return out;
}
/**
 * Creates a matrix from a vector scaling
 * This is equivalent to (but much faster than):
 *
 *     mat2.identity(dest);
 *     mat2.scale(dest, dest, vec);
 *
 * @param {mat2} out mat2 receiving operation result
 * @param {ReadonlyVec2} v Scaling vector
 * @returns {mat2} out
 */


function fromScaling(out, v) {
  out[0] = v[0];
  out[1] = 0;
  out[2] = 0;
  out[3] = v[1];
  return out;
}
/**
 * Returns a string representation of a mat2
 *
 * @param {ReadonlyMat2} a matrix to represent as a string
 * @returns {String} string representation of the matrix
 */


function str(a) {
  return "mat2(" + a[0] + ", " + a[1] + ", " + a[2] + ", " + a[3] + ")";
}
/**
 * Returns Frobenius norm of a mat2
 *
 * @param {ReadonlyMat2} a the matrix to calculate Frobenius norm of
 * @returns {Number} Frobenius norm
 */


function frob(a) {
  return Math.hypot(a[0], a[1], a[2], a[3]);
}
/**
 * Returns L, D and U matrices (Lower triangular, Diagonal and Upper triangular) by factorizing the input matrix
 * @param {ReadonlyMat2} L the lower triangular matrix
 * @param {ReadonlyMat2} D the diagonal matrix
 * @param {ReadonlyMat2} U the upper triangular matrix
 * @param {ReadonlyMat2} a the input matrix to factorize
 */


function LDU(L, D, U, a) {
  L[2] = a[2] / a[0];
  U[0] = a[0];
  U[1] = a[1];
  U[3] = a[3] - L[2] * U[1];
  return [L, D, U];
}
/**
 * Adds two mat2's
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the first operand
 * @param {ReadonlyMat2} b the second operand
 * @returns {mat2} out
 */


function add(out, a, b) {
  out[0] = a[0] + b[0];
  out[1] = a[1] + b[1];
  out[2] = a[2] + b[2];
  out[3] = a[3] + b[3];
  return out;
}
/**
 * Subtracts matrix b from matrix a
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the first operand
 * @param {ReadonlyMat2} b the second operand
 * @returns {mat2} out
 */


function subtract(out, a, b) {
  out[0] = a[0] - b[0];
  out[1] = a[1] - b[1];
  out[2] = a[2] - b[2];
  out[3] = a[3] - b[3];
  return out;
}
/**
 * Returns whether or not the matrices have exactly the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyMat2} a The first matrix.
 * @param {ReadonlyMat2} b The second matrix.
 * @returns {Boolean} True if the matrices are equal, false otherwise.
 */


function exactEquals(a, b) {
  return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3];
}
/**
 * Returns whether or not the matrices have approximately the same elements in the same position.
 *
 * @param {ReadonlyMat2} a The first matrix.
 * @param {ReadonlyMat2} b The second matrix.
 * @returns {Boolean} True if the matrices are equal, false otherwise.
 */


function equals(a, b) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3];
  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3];
  return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3));
}
/**
 * Multiply each element of the matrix by a scalar.
 *
 * @param {mat2} out the receiving matrix
 * @param {ReadonlyMat2} a the matrix to scale
 * @param {Number} b amount to scale the matrix's elements by
 * @returns {mat2} out
 */


function multiplyScalar(out, a, b) {
  out[0] = a[0] * b;
  out[1] = a[1] * b;
  out[2] = a[2] * b;
  out[3] = a[3] * b;
  return out;
}
/**
 * Adds two mat2's after multiplying each element of the second operand by a scalar value.
 *
 * @param {mat2} out the receiving vector
 * @param {ReadonlyMat2} a the first operand
 * @param {ReadonlyMat2} b the second operand
 * @param {Number} scale the amount to scale b's elements by before adding
 * @returns {mat2} out
 */


function multiplyScalarAndAdd(out, a, b, scale) {
  out[0] = a[0] + b[0] * scale;
  out[1] = a[1] + b[1] * scale;
  out[2] = a[2] + b[2] * scale;
  out[3] = a[3] + b[3] * scale;
  return out;
}
/**
 * Alias for {@link mat2.multiply}
 * @function
 */


var mul = multiply;
/**
 * Alias for {@link mat2.subtract}
 * @function
 */

exports.mul = mul;
var sub = subtract;
exports.sub = sub;
},{"./common.js":20}],23:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.clone = clone;
exports.copy = copy;
exports.identity = identity;
exports.fromValues = fromValues;
exports.set = set;
exports.invert = invert;
exports.determinant = determinant;
exports.multiply = multiply;
exports.rotate = rotate;
exports.scale = scale;
exports.translate = translate;
exports.fromRotation = fromRotation;
exports.fromScaling = fromScaling;
exports.fromTranslation = fromTranslation;
exports.str = str;
exports.frob = frob;
exports.add = add;
exports.subtract = subtract;
exports.multiplyScalar = multiplyScalar;
exports.multiplyScalarAndAdd = multiplyScalarAndAdd;
exports.exactEquals = exactEquals;
exports.equals = equals;
exports.sub = exports.mul = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * 2x3 Matrix
 * @module mat2d
 * @description
 * A mat2d contains six elements defined as:
 * <pre>
 * [a, b,
 *  c, d,
 *  tx, ty]
 * </pre>
 * This is a short form for the 3x3 matrix:
 * <pre>
 * [a, b, 0,
 *  c, d, 0,
 *  tx, ty, 1]
 * </pre>
 * The last column is ignored so the array is shorter and operations are faster.
 */

/**
 * Creates a new identity mat2d
 *
 * @returns {mat2d} a new 2x3 matrix
 */
function create() {
  var out = new glMatrix.ARRAY_TYPE(6);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    out[1] = 0;
    out[2] = 0;
    out[4] = 0;
    out[5] = 0;
  }

  out[0] = 1;
  out[3] = 1;
  return out;
}
/**
 * Creates a new mat2d initialized with values from an existing matrix
 *
 * @param {ReadonlyMat2d} a matrix to clone
 * @returns {mat2d} a new 2x3 matrix
 */


function clone(a) {
  var out = new glMatrix.ARRAY_TYPE(6);
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  out[4] = a[4];
  out[5] = a[5];
  return out;
}
/**
 * Copy the values from one mat2d to another
 *
 * @param {mat2d} out the receiving matrix
 * @param {ReadonlyMat2d} a the source matrix
 * @returns {mat2d} out
 */


function copy(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  out[4] = a[4];
  out[5] = a[5];
  return out;
}
/**
 * Set a mat2d to the identity matrix
 *
 * @param {mat2d} out the receiving matrix
 * @returns {mat2d} out
 */


function identity(out) {
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  out[4] = 0;
  out[5] = 0;
  return out;
}
/**
 * Create a new mat2d with the given values
 *
 * @param {Number} a Component A (index 0)
 * @param {Number} b Component B (index 1)
 * @param {Number} c Component C (index 2)
 * @param {Number} d Component D (index 3)
 * @param {Number} tx Component TX (index 4)
 * @param {Number} ty Component TY (index 5)
 * @returns {mat2d} A new mat2d
 */


function fromValues(a, b, c, d, tx, ty) {
  var out = new glMatrix.ARRAY_TYPE(6);
  out[0] = a;
  out[1] = b;
  out[2] = c;
  out[3] = d;
  out[4] = tx;
  out[5] = ty;
  return out;
}
/**
 * Set the components of a mat2d to the given values
 *
 * @param {mat2d} out the receiving matrix
 * @param {Number} a Component A (index 0)
 * @param {Number} b Component B (index 1)
 * @param {Number} c Component C (index 2)
 * @param {Number} d Component D (index 3)
 * @param {Number} tx Component TX (index 4)
 * @param {Number} ty Component TY (index 5)
 * @returns {mat2d} out
 */


function set(out, a, b, c, d, tx, ty) {
  out[0] = a;
  out[1] = b;
  out[2] = c;
  out[3] = d;
  out[4] = tx;
  out[5] = ty;
  return out;
}
/**
 * Inverts a mat2d
 *
 * @param {mat2d} out the receiving matrix
 * @param {ReadonlyMat2d} a the source matrix
 * @returns {mat2d} out
 */


function invert(out, a) {
  var aa = a[0],
      ab = a[1],
      ac = a[2],
      ad = a[3];
  var atx = a[4],
      aty = a[5];
  var det = aa * ad - ab * ac;

  if (!det) {
    return null;
  }

  det = 1.0 / det;
  out[0] = ad * det;
  out[1] = -ab * det;
  out[2] = -ac * det;
  out[3] = aa * det;
  out[4] = (ac * aty - ad * atx) * det;
  out[5] = (ab * atx - aa * aty) * det;
  return out;
}
/**
 * Calculates the determinant of a mat2d
 *
 * @param {ReadonlyMat2d} a the source matrix
 * @returns {Number} determinant of a
 */


function determinant(a) {
  return a[0] * a[3] - a[1] * a[2];
}
/**
 * Multiplies two mat2d's
 *
 * @param {mat2d} out the receiving matrix
 * @param {ReadonlyMat2d} a the first operand
 * @param {ReadonlyMat2d} b the second operand
 * @returns {mat2d} out
 */


function multiply(out, a, b) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3],
      a4 = a[4],
      a5 = a[5];
  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3],
      b4 = b[4],
      b5 = b[5];
  out[0] = a0 * b0 + a2 * b1;
  out[1] = a1 * b0 + a3 * b1;
  out[2] = a0 * b2 + a2 * b3;
  out[3] = a1 * b2 + a3 * b3;
  out[4] = a0 * b4 + a2 * b5 + a4;
  out[5] = a1 * b4 + a3 * b5 + a5;
  return out;
}
/**
 * Rotates a mat2d by the given angle
 *
 * @param {mat2d} out the receiving matrix
 * @param {ReadonlyMat2d} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat2d} out
 */


function rotate(out, a, rad) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3],
      a4 = a[4],
      a5 = a[5];
  var s = Math.sin(rad);
  var c = Math.cos(rad);
  out[0] = a0 * c + a2 * s;
  out[1] = a1 * c + a3 * s;
  out[2] = a0 * -s + a2 * c;
  out[3] = a1 * -s + a3 * c;
  out[4] = a4;
  out[5] = a5;
  return out;
}
/**
 * Scales the mat2d by the dimensions in the given vec2
 *
 * @param {mat2d} out the receiving matrix
 * @param {ReadonlyMat2d} a the matrix to translate
 * @param {ReadonlyVec2} v the vec2 to scale the matrix by
 * @returns {mat2d} out
 **/


function scale(out, a, v) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3],
      a4 = a[4],
      a5 = a[5];
  var v0 = v[0],
      v1 = v[1];
  out[0] = a0 * v0;
  out[1] = a1 * v0;
  out[2] = a2 * v1;
  out[3] = a3 * v1;
  out[4] = a4;
  out[5] = a5;
  return out;
}
/**
 * Translates the mat2d by the dimensions in the given vec2
 *
 * @param {mat2d} out the receiving matrix
 * @param {ReadonlyMat2d} a the matrix to translate
 * @param {ReadonlyVec2} v the vec2 to translate the matrix by
 * @returns {mat2d} out
 **/


function translate(out, a, v) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3],
      a4 = a[4],
      a5 = a[5];
  var v0 = v[0],
      v1 = v[1];
  out[0] = a0;
  out[1] = a1;
  out[2] = a2;
  out[3] = a3;
  out[4] = a0 * v0 + a2 * v1 + a4;
  out[5] = a1 * v0 + a3 * v1 + a5;
  return out;
}
/**
 * Creates a matrix from a given angle
 * This is equivalent to (but much faster than):
 *
 *     mat2d.identity(dest);
 *     mat2d.rotate(dest, dest, rad);
 *
 * @param {mat2d} out mat2d receiving operation result
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat2d} out
 */


function fromRotation(out, rad) {
  var s = Math.sin(rad),
      c = Math.cos(rad);
  out[0] = c;
  out[1] = s;
  out[2] = -s;
  out[3] = c;
  out[4] = 0;
  out[5] = 0;
  return out;
}
/**
 * Creates a matrix from a vector scaling
 * This is equivalent to (but much faster than):
 *
 *     mat2d.identity(dest);
 *     mat2d.scale(dest, dest, vec);
 *
 * @param {mat2d} out mat2d receiving operation result
 * @param {ReadonlyVec2} v Scaling vector
 * @returns {mat2d} out
 */


function fromScaling(out, v) {
  out[0] = v[0];
  out[1] = 0;
  out[2] = 0;
  out[3] = v[1];
  out[4] = 0;
  out[5] = 0;
  return out;
}
/**
 * Creates a matrix from a vector translation
 * This is equivalent to (but much faster than):
 *
 *     mat2d.identity(dest);
 *     mat2d.translate(dest, dest, vec);
 *
 * @param {mat2d} out mat2d receiving operation result
 * @param {ReadonlyVec2} v Translation vector
 * @returns {mat2d} out
 */


function fromTranslation(out, v) {
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  out[4] = v[0];
  out[5] = v[1];
  return out;
}
/**
 * Returns a string representation of a mat2d
 *
 * @param {ReadonlyMat2d} a matrix to represent as a string
 * @returns {String} string representation of the matrix
 */


function str(a) {
  return "mat2d(" + a[0] + ", " + a[1] + ", " + a[2] + ", " + a[3] + ", " + a[4] + ", " + a[5] + ")";
}
/**
 * Returns Frobenius norm of a mat2d
 *
 * @param {ReadonlyMat2d} a the matrix to calculate Frobenius norm of
 * @returns {Number} Frobenius norm
 */


function frob(a) {
  return Math.hypot(a[0], a[1], a[2], a[3], a[4], a[5], 1);
}
/**
 * Adds two mat2d's
 *
 * @param {mat2d} out the receiving matrix
 * @param {ReadonlyMat2d} a the first operand
 * @param {ReadonlyMat2d} b the second operand
 * @returns {mat2d} out
 */


function add(out, a, b) {
  out[0] = a[0] + b[0];
  out[1] = a[1] + b[1];
  out[2] = a[2] + b[2];
  out[3] = a[3] + b[3];
  out[4] = a[4] + b[4];
  out[5] = a[5] + b[5];
  return out;
}
/**
 * Subtracts matrix b from matrix a
 *
 * @param {mat2d} out the receiving matrix
 * @param {ReadonlyMat2d} a the first operand
 * @param {ReadonlyMat2d} b the second operand
 * @returns {mat2d} out
 */


function subtract(out, a, b) {
  out[0] = a[0] - b[0];
  out[1] = a[1] - b[1];
  out[2] = a[2] - b[2];
  out[3] = a[3] - b[3];
  out[4] = a[4] - b[4];
  out[5] = a[5] - b[5];
  return out;
}
/**
 * Multiply each element of the matrix by a scalar.
 *
 * @param {mat2d} out the receiving matrix
 * @param {ReadonlyMat2d} a the matrix to scale
 * @param {Number} b amount to scale the matrix's elements by
 * @returns {mat2d} out
 */


function multiplyScalar(out, a, b) {
  out[0] = a[0] * b;
  out[1] = a[1] * b;
  out[2] = a[2] * b;
  out[3] = a[3] * b;
  out[4] = a[4] * b;
  out[5] = a[5] * b;
  return out;
}
/**
 * Adds two mat2d's after multiplying each element of the second operand by a scalar value.
 *
 * @param {mat2d} out the receiving vector
 * @param {ReadonlyMat2d} a the first operand
 * @param {ReadonlyMat2d} b the second operand
 * @param {Number} scale the amount to scale b's elements by before adding
 * @returns {mat2d} out
 */


function multiplyScalarAndAdd(out, a, b, scale) {
  out[0] = a[0] + b[0] * scale;
  out[1] = a[1] + b[1] * scale;
  out[2] = a[2] + b[2] * scale;
  out[3] = a[3] + b[3] * scale;
  out[4] = a[4] + b[4] * scale;
  out[5] = a[5] + b[5] * scale;
  return out;
}
/**
 * Returns whether or not the matrices have exactly the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyMat2d} a The first matrix.
 * @param {ReadonlyMat2d} b The second matrix.
 * @returns {Boolean} True if the matrices are equal, false otherwise.
 */


function exactEquals(a, b) {
  return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3] && a[4] === b[4] && a[5] === b[5];
}
/**
 * Returns whether or not the matrices have approximately the same elements in the same position.
 *
 * @param {ReadonlyMat2d} a The first matrix.
 * @param {ReadonlyMat2d} b The second matrix.
 * @returns {Boolean} True if the matrices are equal, false otherwise.
 */


function equals(a, b) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3],
      a4 = a[4],
      a5 = a[5];
  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3],
      b4 = b[4],
      b5 = b[5];
  return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3)) && Math.abs(a4 - b4) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a4), Math.abs(b4)) && Math.abs(a5 - b5) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a5), Math.abs(b5));
}
/**
 * Alias for {@link mat2d.multiply}
 * @function
 */


var mul = multiply;
/**
 * Alias for {@link mat2d.subtract}
 * @function
 */

exports.mul = mul;
var sub = subtract;
exports.sub = sub;
},{"./common.js":20}],24:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.fromMat4 = fromMat4;
exports.clone = clone;
exports.copy = copy;
exports.fromValues = fromValues;
exports.set = set;
exports.identity = identity;
exports.transpose = transpose;
exports.invert = invert;
exports.adjoint = adjoint;
exports.determinant = determinant;
exports.multiply = multiply;
exports.translate = translate;
exports.rotate = rotate;
exports.scale = scale;
exports.fromTranslation = fromTranslation;
exports.fromRotation = fromRotation;
exports.fromScaling = fromScaling;
exports.fromMat2d = fromMat2d;
exports.fromQuat = fromQuat;
exports.normalFromMat4 = normalFromMat4;
exports.projection = projection;
exports.str = str;
exports.frob = frob;
exports.add = add;
exports.subtract = subtract;
exports.multiplyScalar = multiplyScalar;
exports.multiplyScalarAndAdd = multiplyScalarAndAdd;
exports.exactEquals = exactEquals;
exports.equals = equals;
exports.sub = exports.mul = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * 3x3 Matrix
 * @module mat3
 */

/**
 * Creates a new identity mat3
 *
 * @returns {mat3} a new 3x3 matrix
 */
function create() {
  var out = new glMatrix.ARRAY_TYPE(9);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    out[1] = 0;
    out[2] = 0;
    out[3] = 0;
    out[5] = 0;
    out[6] = 0;
    out[7] = 0;
  }

  out[0] = 1;
  out[4] = 1;
  out[8] = 1;
  return out;
}
/**
 * Copies the upper-left 3x3 values into the given mat3.
 *
 * @param {mat3} out the receiving 3x3 matrix
 * @param {ReadonlyMat4} a   the source 4x4 matrix
 * @returns {mat3} out
 */


function fromMat4(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[4];
  out[4] = a[5];
  out[5] = a[6];
  out[6] = a[8];
  out[7] = a[9];
  out[8] = a[10];
  return out;
}
/**
 * Creates a new mat3 initialized with values from an existing matrix
 *
 * @param {ReadonlyMat3} a matrix to clone
 * @returns {mat3} a new 3x3 matrix
 */


function clone(a) {
  var out = new glMatrix.ARRAY_TYPE(9);
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  out[4] = a[4];
  out[5] = a[5];
  out[6] = a[6];
  out[7] = a[7];
  out[8] = a[8];
  return out;
}
/**
 * Copy the values from one mat3 to another
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the source matrix
 * @returns {mat3} out
 */


function copy(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  out[4] = a[4];
  out[5] = a[5];
  out[6] = a[6];
  out[7] = a[7];
  out[8] = a[8];
  return out;
}
/**
 * Create a new mat3 with the given values
 *
 * @param {Number} m00 Component in column 0, row 0 position (index 0)
 * @param {Number} m01 Component in column 0, row 1 position (index 1)
 * @param {Number} m02 Component in column 0, row 2 position (index 2)
 * @param {Number} m10 Component in column 1, row 0 position (index 3)
 * @param {Number} m11 Component in column 1, row 1 position (index 4)
 * @param {Number} m12 Component in column 1, row 2 position (index 5)
 * @param {Number} m20 Component in column 2, row 0 position (index 6)
 * @param {Number} m21 Component in column 2, row 1 position (index 7)
 * @param {Number} m22 Component in column 2, row 2 position (index 8)
 * @returns {mat3} A new mat3
 */


function fromValues(m00, m01, m02, m10, m11, m12, m20, m21, m22) {
  var out = new glMatrix.ARRAY_TYPE(9);
  out[0] = m00;
  out[1] = m01;
  out[2] = m02;
  out[3] = m10;
  out[4] = m11;
  out[5] = m12;
  out[6] = m20;
  out[7] = m21;
  out[8] = m22;
  return out;
}
/**
 * Set the components of a mat3 to the given values
 *
 * @param {mat3} out the receiving matrix
 * @param {Number} m00 Component in column 0, row 0 position (index 0)
 * @param {Number} m01 Component in column 0, row 1 position (index 1)
 * @param {Number} m02 Component in column 0, row 2 position (index 2)
 * @param {Number} m10 Component in column 1, row 0 position (index 3)
 * @param {Number} m11 Component in column 1, row 1 position (index 4)
 * @param {Number} m12 Component in column 1, row 2 position (index 5)
 * @param {Number} m20 Component in column 2, row 0 position (index 6)
 * @param {Number} m21 Component in column 2, row 1 position (index 7)
 * @param {Number} m22 Component in column 2, row 2 position (index 8)
 * @returns {mat3} out
 */


function set(out, m00, m01, m02, m10, m11, m12, m20, m21, m22) {
  out[0] = m00;
  out[1] = m01;
  out[2] = m02;
  out[3] = m10;
  out[4] = m11;
  out[5] = m12;
  out[6] = m20;
  out[7] = m21;
  out[8] = m22;
  return out;
}
/**
 * Set a mat3 to the identity matrix
 *
 * @param {mat3} out the receiving matrix
 * @returns {mat3} out
 */


function identity(out) {
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 1;
  out[5] = 0;
  out[6] = 0;
  out[7] = 0;
  out[8] = 1;
  return out;
}
/**
 * Transpose the values of a mat3
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the source matrix
 * @returns {mat3} out
 */


function transpose(out, a) {
  // If we are transposing ourselves we can skip a few steps but have to cache some values
  if (out === a) {
    var a01 = a[1],
        a02 = a[2],
        a12 = a[5];
    out[1] = a[3];
    out[2] = a[6];
    out[3] = a01;
    out[5] = a[7];
    out[6] = a02;
    out[7] = a12;
  } else {
    out[0] = a[0];
    out[1] = a[3];
    out[2] = a[6];
    out[3] = a[1];
    out[4] = a[4];
    out[5] = a[7];
    out[6] = a[2];
    out[7] = a[5];
    out[8] = a[8];
  }

  return out;
}
/**
 * Inverts a mat3
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the source matrix
 * @returns {mat3} out
 */


function invert(out, a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2];
  var a10 = a[3],
      a11 = a[4],
      a12 = a[5];
  var a20 = a[6],
      a21 = a[7],
      a22 = a[8];
  var b01 = a22 * a11 - a12 * a21;
  var b11 = -a22 * a10 + a12 * a20;
  var b21 = a21 * a10 - a11 * a20; // Calculate the determinant

  var det = a00 * b01 + a01 * b11 + a02 * b21;

  if (!det) {
    return null;
  }

  det = 1.0 / det;
  out[0] = b01 * det;
  out[1] = (-a22 * a01 + a02 * a21) * det;
  out[2] = (a12 * a01 - a02 * a11) * det;
  out[3] = b11 * det;
  out[4] = (a22 * a00 - a02 * a20) * det;
  out[5] = (-a12 * a00 + a02 * a10) * det;
  out[6] = b21 * det;
  out[7] = (-a21 * a00 + a01 * a20) * det;
  out[8] = (a11 * a00 - a01 * a10) * det;
  return out;
}
/**
 * Calculates the adjugate of a mat3
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the source matrix
 * @returns {mat3} out
 */


function adjoint(out, a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2];
  var a10 = a[3],
      a11 = a[4],
      a12 = a[5];
  var a20 = a[6],
      a21 = a[7],
      a22 = a[8];
  out[0] = a11 * a22 - a12 * a21;
  out[1] = a02 * a21 - a01 * a22;
  out[2] = a01 * a12 - a02 * a11;
  out[3] = a12 * a20 - a10 * a22;
  out[4] = a00 * a22 - a02 * a20;
  out[5] = a02 * a10 - a00 * a12;
  out[6] = a10 * a21 - a11 * a20;
  out[7] = a01 * a20 - a00 * a21;
  out[8] = a00 * a11 - a01 * a10;
  return out;
}
/**
 * Calculates the determinant of a mat3
 *
 * @param {ReadonlyMat3} a the source matrix
 * @returns {Number} determinant of a
 */


function determinant(a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2];
  var a10 = a[3],
      a11 = a[4],
      a12 = a[5];
  var a20 = a[6],
      a21 = a[7],
      a22 = a[8];
  return a00 * (a22 * a11 - a12 * a21) + a01 * (-a22 * a10 + a12 * a20) + a02 * (a21 * a10 - a11 * a20);
}
/**
 * Multiplies two mat3's
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the first operand
 * @param {ReadonlyMat3} b the second operand
 * @returns {mat3} out
 */


function multiply(out, a, b) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2];
  var a10 = a[3],
      a11 = a[4],
      a12 = a[5];
  var a20 = a[6],
      a21 = a[7],
      a22 = a[8];
  var b00 = b[0],
      b01 = b[1],
      b02 = b[2];
  var b10 = b[3],
      b11 = b[4],
      b12 = b[5];
  var b20 = b[6],
      b21 = b[7],
      b22 = b[8];
  out[0] = b00 * a00 + b01 * a10 + b02 * a20;
  out[1] = b00 * a01 + b01 * a11 + b02 * a21;
  out[2] = b00 * a02 + b01 * a12 + b02 * a22;
  out[3] = b10 * a00 + b11 * a10 + b12 * a20;
  out[4] = b10 * a01 + b11 * a11 + b12 * a21;
  out[5] = b10 * a02 + b11 * a12 + b12 * a22;
  out[6] = b20 * a00 + b21 * a10 + b22 * a20;
  out[7] = b20 * a01 + b21 * a11 + b22 * a21;
  out[8] = b20 * a02 + b21 * a12 + b22 * a22;
  return out;
}
/**
 * Translate a mat3 by the given vector
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the matrix to translate
 * @param {ReadonlyVec2} v vector to translate by
 * @returns {mat3} out
 */


function translate(out, a, v) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a10 = a[3],
      a11 = a[4],
      a12 = a[5],
      a20 = a[6],
      a21 = a[7],
      a22 = a[8],
      x = v[0],
      y = v[1];
  out[0] = a00;
  out[1] = a01;
  out[2] = a02;
  out[3] = a10;
  out[4] = a11;
  out[5] = a12;
  out[6] = x * a00 + y * a10 + a20;
  out[7] = x * a01 + y * a11 + a21;
  out[8] = x * a02 + y * a12 + a22;
  return out;
}
/**
 * Rotates a mat3 by the given angle
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat3} out
 */


function rotate(out, a, rad) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a10 = a[3],
      a11 = a[4],
      a12 = a[5],
      a20 = a[6],
      a21 = a[7],
      a22 = a[8],
      s = Math.sin(rad),
      c = Math.cos(rad);
  out[0] = c * a00 + s * a10;
  out[1] = c * a01 + s * a11;
  out[2] = c * a02 + s * a12;
  out[3] = c * a10 - s * a00;
  out[4] = c * a11 - s * a01;
  out[5] = c * a12 - s * a02;
  out[6] = a20;
  out[7] = a21;
  out[8] = a22;
  return out;
}
/**
 * Scales the mat3 by the dimensions in the given vec2
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the matrix to rotate
 * @param {ReadonlyVec2} v the vec2 to scale the matrix by
 * @returns {mat3} out
 **/


function scale(out, a, v) {
  var x = v[0],
      y = v[1];
  out[0] = x * a[0];
  out[1] = x * a[1];
  out[2] = x * a[2];
  out[3] = y * a[3];
  out[4] = y * a[4];
  out[5] = y * a[5];
  out[6] = a[6];
  out[7] = a[7];
  out[8] = a[8];
  return out;
}
/**
 * Creates a matrix from a vector translation
 * This is equivalent to (but much faster than):
 *
 *     mat3.identity(dest);
 *     mat3.translate(dest, dest, vec);
 *
 * @param {mat3} out mat3 receiving operation result
 * @param {ReadonlyVec2} v Translation vector
 * @returns {mat3} out
 */


function fromTranslation(out, v) {
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 1;
  out[5] = 0;
  out[6] = v[0];
  out[7] = v[1];
  out[8] = 1;
  return out;
}
/**
 * Creates a matrix from a given angle
 * This is equivalent to (but much faster than):
 *
 *     mat3.identity(dest);
 *     mat3.rotate(dest, dest, rad);
 *
 * @param {mat3} out mat3 receiving operation result
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat3} out
 */


function fromRotation(out, rad) {
  var s = Math.sin(rad),
      c = Math.cos(rad);
  out[0] = c;
  out[1] = s;
  out[2] = 0;
  out[3] = -s;
  out[4] = c;
  out[5] = 0;
  out[6] = 0;
  out[7] = 0;
  out[8] = 1;
  return out;
}
/**
 * Creates a matrix from a vector scaling
 * This is equivalent to (but much faster than):
 *
 *     mat3.identity(dest);
 *     mat3.scale(dest, dest, vec);
 *
 * @param {mat3} out mat3 receiving operation result
 * @param {ReadonlyVec2} v Scaling vector
 * @returns {mat3} out
 */


function fromScaling(out, v) {
  out[0] = v[0];
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = v[1];
  out[5] = 0;
  out[6] = 0;
  out[7] = 0;
  out[8] = 1;
  return out;
}
/**
 * Copies the values from a mat2d into a mat3
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat2d} a the matrix to copy
 * @returns {mat3} out
 **/


function fromMat2d(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = 0;
  out[3] = a[2];
  out[4] = a[3];
  out[5] = 0;
  out[6] = a[4];
  out[7] = a[5];
  out[8] = 1;
  return out;
}
/**
 * Calculates a 3x3 matrix from the given quaternion
 *
 * @param {mat3} out mat3 receiving operation result
 * @param {ReadonlyQuat} q Quaternion to create matrix from
 *
 * @returns {mat3} out
 */


function fromQuat(out, q) {
  var x = q[0],
      y = q[1],
      z = q[2],
      w = q[3];
  var x2 = x + x;
  var y2 = y + y;
  var z2 = z + z;
  var xx = x * x2;
  var yx = y * x2;
  var yy = y * y2;
  var zx = z * x2;
  var zy = z * y2;
  var zz = z * z2;
  var wx = w * x2;
  var wy = w * y2;
  var wz = w * z2;
  out[0] = 1 - yy - zz;
  out[3] = yx - wz;
  out[6] = zx + wy;
  out[1] = yx + wz;
  out[4] = 1 - xx - zz;
  out[7] = zy - wx;
  out[2] = zx - wy;
  out[5] = zy + wx;
  out[8] = 1 - xx - yy;
  return out;
}
/**
 * Calculates a 3x3 normal matrix (transpose inverse) from the 4x4 matrix
 *
 * @param {mat3} out mat3 receiving operation result
 * @param {ReadonlyMat4} a Mat4 to derive the normal matrix from
 *
 * @returns {mat3} out
 */


function normalFromMat4(out, a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a03 = a[3];
  var a10 = a[4],
      a11 = a[5],
      a12 = a[6],
      a13 = a[7];
  var a20 = a[8],
      a21 = a[9],
      a22 = a[10],
      a23 = a[11];
  var a30 = a[12],
      a31 = a[13],
      a32 = a[14],
      a33 = a[15];
  var b00 = a00 * a11 - a01 * a10;
  var b01 = a00 * a12 - a02 * a10;
  var b02 = a00 * a13 - a03 * a10;
  var b03 = a01 * a12 - a02 * a11;
  var b04 = a01 * a13 - a03 * a11;
  var b05 = a02 * a13 - a03 * a12;
  var b06 = a20 * a31 - a21 * a30;
  var b07 = a20 * a32 - a22 * a30;
  var b08 = a20 * a33 - a23 * a30;
  var b09 = a21 * a32 - a22 * a31;
  var b10 = a21 * a33 - a23 * a31;
  var b11 = a22 * a33 - a23 * a32; // Calculate the determinant

  var det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;

  if (!det) {
    return null;
  }

  det = 1.0 / det;
  out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;
  out[1] = (a12 * b08 - a10 * b11 - a13 * b07) * det;
  out[2] = (a10 * b10 - a11 * b08 + a13 * b06) * det;
  out[3] = (a02 * b10 - a01 * b11 - a03 * b09) * det;
  out[4] = (a00 * b11 - a02 * b08 + a03 * b07) * det;
  out[5] = (a01 * b08 - a00 * b10 - a03 * b06) * det;
  out[6] = (a31 * b05 - a32 * b04 + a33 * b03) * det;
  out[7] = (a32 * b02 - a30 * b05 - a33 * b01) * det;
  out[8] = (a30 * b04 - a31 * b02 + a33 * b00) * det;
  return out;
}
/**
 * Generates a 2D projection matrix with the given bounds
 *
 * @param {mat3} out mat3 frustum matrix will be written into
 * @param {number} width Width of your gl context
 * @param {number} height Height of gl context
 * @returns {mat3} out
 */


function projection(out, width, height) {
  out[0] = 2 / width;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = -2 / height;
  out[5] = 0;
  out[6] = -1;
  out[7] = 1;
  out[8] = 1;
  return out;
}
/**
 * Returns a string representation of a mat3
 *
 * @param {ReadonlyMat3} a matrix to represent as a string
 * @returns {String} string representation of the matrix
 */


function str(a) {
  return "mat3(" + a[0] + ", " + a[1] + ", " + a[2] + ", " + a[3] + ", " + a[4] + ", " + a[5] + ", " + a[6] + ", " + a[7] + ", " + a[8] + ")";
}
/**
 * Returns Frobenius norm of a mat3
 *
 * @param {ReadonlyMat3} a the matrix to calculate Frobenius norm of
 * @returns {Number} Frobenius norm
 */


function frob(a) {
  return Math.hypot(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8]);
}
/**
 * Adds two mat3's
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the first operand
 * @param {ReadonlyMat3} b the second operand
 * @returns {mat3} out
 */


function add(out, a, b) {
  out[0] = a[0] + b[0];
  out[1] = a[1] + b[1];
  out[2] = a[2] + b[2];
  out[3] = a[3] + b[3];
  out[4] = a[4] + b[4];
  out[5] = a[5] + b[5];
  out[6] = a[6] + b[6];
  out[7] = a[7] + b[7];
  out[8] = a[8] + b[8];
  return out;
}
/**
 * Subtracts matrix b from matrix a
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the first operand
 * @param {ReadonlyMat3} b the second operand
 * @returns {mat3} out
 */


function subtract(out, a, b) {
  out[0] = a[0] - b[0];
  out[1] = a[1] - b[1];
  out[2] = a[2] - b[2];
  out[3] = a[3] - b[3];
  out[4] = a[4] - b[4];
  out[5] = a[5] - b[5];
  out[6] = a[6] - b[6];
  out[7] = a[7] - b[7];
  out[8] = a[8] - b[8];
  return out;
}
/**
 * Multiply each element of the matrix by a scalar.
 *
 * @param {mat3} out the receiving matrix
 * @param {ReadonlyMat3} a the matrix to scale
 * @param {Number} b amount to scale the matrix's elements by
 * @returns {mat3} out
 */


function multiplyScalar(out, a, b) {
  out[0] = a[0] * b;
  out[1] = a[1] * b;
  out[2] = a[2] * b;
  out[3] = a[3] * b;
  out[4] = a[4] * b;
  out[5] = a[5] * b;
  out[6] = a[6] * b;
  out[7] = a[7] * b;
  out[8] = a[8] * b;
  return out;
}
/**
 * Adds two mat3's after multiplying each element of the second operand by a scalar value.
 *
 * @param {mat3} out the receiving vector
 * @param {ReadonlyMat3} a the first operand
 * @param {ReadonlyMat3} b the second operand
 * @param {Number} scale the amount to scale b's elements by before adding
 * @returns {mat3} out
 */


function multiplyScalarAndAdd(out, a, b, scale) {
  out[0] = a[0] + b[0] * scale;
  out[1] = a[1] + b[1] * scale;
  out[2] = a[2] + b[2] * scale;
  out[3] = a[3] + b[3] * scale;
  out[4] = a[4] + b[4] * scale;
  out[5] = a[5] + b[5] * scale;
  out[6] = a[6] + b[6] * scale;
  out[7] = a[7] + b[7] * scale;
  out[8] = a[8] + b[8] * scale;
  return out;
}
/**
 * Returns whether or not the matrices have exactly the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyMat3} a The first matrix.
 * @param {ReadonlyMat3} b The second matrix.
 * @returns {Boolean} True if the matrices are equal, false otherwise.
 */


function exactEquals(a, b) {
  return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3] && a[4] === b[4] && a[5] === b[5] && a[6] === b[6] && a[7] === b[7] && a[8] === b[8];
}
/**
 * Returns whether or not the matrices have approximately the same elements in the same position.
 *
 * @param {ReadonlyMat3} a The first matrix.
 * @param {ReadonlyMat3} b The second matrix.
 * @returns {Boolean} True if the matrices are equal, false otherwise.
 */


function equals(a, b) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3],
      a4 = a[4],
      a5 = a[5],
      a6 = a[6],
      a7 = a[7],
      a8 = a[8];
  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3],
      b4 = b[4],
      b5 = b[5],
      b6 = b[6],
      b7 = b[7],
      b8 = b[8];
  return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3)) && Math.abs(a4 - b4) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a4), Math.abs(b4)) && Math.abs(a5 - b5) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a5), Math.abs(b5)) && Math.abs(a6 - b6) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a6), Math.abs(b6)) && Math.abs(a7 - b7) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a7), Math.abs(b7)) && Math.abs(a8 - b8) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a8), Math.abs(b8));
}
/**
 * Alias for {@link mat3.multiply}
 * @function
 */


var mul = multiply;
/**
 * Alias for {@link mat3.subtract}
 * @function
 */

exports.mul = mul;
var sub = subtract;
exports.sub = sub;
},{"./common.js":20}],25:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.clone = clone;
exports.copy = copy;
exports.fromValues = fromValues;
exports.set = set;
exports.identity = identity;
exports.transpose = transpose;
exports.invert = invert;
exports.adjoint = adjoint;
exports.determinant = determinant;
exports.multiply = multiply;
exports.translate = translate;
exports.scale = scale;
exports.rotate = rotate;
exports.rotateX = rotateX;
exports.rotateY = rotateY;
exports.rotateZ = rotateZ;
exports.fromTranslation = fromTranslation;
exports.fromScaling = fromScaling;
exports.fromRotation = fromRotation;
exports.fromXRotation = fromXRotation;
exports.fromYRotation = fromYRotation;
exports.fromZRotation = fromZRotation;
exports.fromRotationTranslation = fromRotationTranslation;
exports.fromQuat2 = fromQuat2;
exports.getTranslation = getTranslation;
exports.getScaling = getScaling;
exports.getRotation = getRotation;
exports.fromRotationTranslationScale = fromRotationTranslationScale;
exports.fromRotationTranslationScaleOrigin = fromRotationTranslationScaleOrigin;
exports.fromQuat = fromQuat;
exports.frustum = frustum;
exports.perspective = perspective;
exports.perspectiveFromFieldOfView = perspectiveFromFieldOfView;
exports.ortho = ortho;
exports.lookAt = lookAt;
exports.targetTo = targetTo;
exports.str = str;
exports.frob = frob;
exports.add = add;
exports.subtract = subtract;
exports.multiplyScalar = multiplyScalar;
exports.multiplyScalarAndAdd = multiplyScalarAndAdd;
exports.exactEquals = exactEquals;
exports.equals = equals;
exports.sub = exports.mul = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * 4x4 Matrix<br>Format: column-major, when typed out it looks like row-major<br>The matrices are being post multiplied.
 * @module mat4
 */

/**
 * Creates a new identity mat4
 *
 * @returns {mat4} a new 4x4 matrix
 */
function create() {
  var out = new glMatrix.ARRAY_TYPE(16);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    out[1] = 0;
    out[2] = 0;
    out[3] = 0;
    out[4] = 0;
    out[6] = 0;
    out[7] = 0;
    out[8] = 0;
    out[9] = 0;
    out[11] = 0;
    out[12] = 0;
    out[13] = 0;
    out[14] = 0;
  }

  out[0] = 1;
  out[5] = 1;
  out[10] = 1;
  out[15] = 1;
  return out;
}
/**
 * Creates a new mat4 initialized with values from an existing matrix
 *
 * @param {ReadonlyMat4} a matrix to clone
 * @returns {mat4} a new 4x4 matrix
 */


function clone(a) {
  var out = new glMatrix.ARRAY_TYPE(16);
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  out[4] = a[4];
  out[5] = a[5];
  out[6] = a[6];
  out[7] = a[7];
  out[8] = a[8];
  out[9] = a[9];
  out[10] = a[10];
  out[11] = a[11];
  out[12] = a[12];
  out[13] = a[13];
  out[14] = a[14];
  out[15] = a[15];
  return out;
}
/**
 * Copy the values from one mat4 to another
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the source matrix
 * @returns {mat4} out
 */


function copy(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  out[4] = a[4];
  out[5] = a[5];
  out[6] = a[6];
  out[7] = a[7];
  out[8] = a[8];
  out[9] = a[9];
  out[10] = a[10];
  out[11] = a[11];
  out[12] = a[12];
  out[13] = a[13];
  out[14] = a[14];
  out[15] = a[15];
  return out;
}
/**
 * Create a new mat4 with the given values
 *
 * @param {Number} m00 Component in column 0, row 0 position (index 0)
 * @param {Number} m01 Component in column 0, row 1 position (index 1)
 * @param {Number} m02 Component in column 0, row 2 position (index 2)
 * @param {Number} m03 Component in column 0, row 3 position (index 3)
 * @param {Number} m10 Component in column 1, row 0 position (index 4)
 * @param {Number} m11 Component in column 1, row 1 position (index 5)
 * @param {Number} m12 Component in column 1, row 2 position (index 6)
 * @param {Number} m13 Component in column 1, row 3 position (index 7)
 * @param {Number} m20 Component in column 2, row 0 position (index 8)
 * @param {Number} m21 Component in column 2, row 1 position (index 9)
 * @param {Number} m22 Component in column 2, row 2 position (index 10)
 * @param {Number} m23 Component in column 2, row 3 position (index 11)
 * @param {Number} m30 Component in column 3, row 0 position (index 12)
 * @param {Number} m31 Component in column 3, row 1 position (index 13)
 * @param {Number} m32 Component in column 3, row 2 position (index 14)
 * @param {Number} m33 Component in column 3, row 3 position (index 15)
 * @returns {mat4} A new mat4
 */


function fromValues(m00, m01, m02, m03, m10, m11, m12, m13, m20, m21, m22, m23, m30, m31, m32, m33) {
  var out = new glMatrix.ARRAY_TYPE(16);
  out[0] = m00;
  out[1] = m01;
  out[2] = m02;
  out[3] = m03;
  out[4] = m10;
  out[5] = m11;
  out[6] = m12;
  out[7] = m13;
  out[8] = m20;
  out[9] = m21;
  out[10] = m22;
  out[11] = m23;
  out[12] = m30;
  out[13] = m31;
  out[14] = m32;
  out[15] = m33;
  return out;
}
/**
 * Set the components of a mat4 to the given values
 *
 * @param {mat4} out the receiving matrix
 * @param {Number} m00 Component in column 0, row 0 position (index 0)
 * @param {Number} m01 Component in column 0, row 1 position (index 1)
 * @param {Number} m02 Component in column 0, row 2 position (index 2)
 * @param {Number} m03 Component in column 0, row 3 position (index 3)
 * @param {Number} m10 Component in column 1, row 0 position (index 4)
 * @param {Number} m11 Component in column 1, row 1 position (index 5)
 * @param {Number} m12 Component in column 1, row 2 position (index 6)
 * @param {Number} m13 Component in column 1, row 3 position (index 7)
 * @param {Number} m20 Component in column 2, row 0 position (index 8)
 * @param {Number} m21 Component in column 2, row 1 position (index 9)
 * @param {Number} m22 Component in column 2, row 2 position (index 10)
 * @param {Number} m23 Component in column 2, row 3 position (index 11)
 * @param {Number} m30 Component in column 3, row 0 position (index 12)
 * @param {Number} m31 Component in column 3, row 1 position (index 13)
 * @param {Number} m32 Component in column 3, row 2 position (index 14)
 * @param {Number} m33 Component in column 3, row 3 position (index 15)
 * @returns {mat4} out
 */


function set(out, m00, m01, m02, m03, m10, m11, m12, m13, m20, m21, m22, m23, m30, m31, m32, m33) {
  out[0] = m00;
  out[1] = m01;
  out[2] = m02;
  out[3] = m03;
  out[4] = m10;
  out[5] = m11;
  out[6] = m12;
  out[7] = m13;
  out[8] = m20;
  out[9] = m21;
  out[10] = m22;
  out[11] = m23;
  out[12] = m30;
  out[13] = m31;
  out[14] = m32;
  out[15] = m33;
  return out;
}
/**
 * Set a mat4 to the identity matrix
 *
 * @param {mat4} out the receiving matrix
 * @returns {mat4} out
 */


function identity(out) {
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = 1;
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[10] = 1;
  out[11] = 0;
  out[12] = 0;
  out[13] = 0;
  out[14] = 0;
  out[15] = 1;
  return out;
}
/**
 * Transpose the values of a mat4
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the source matrix
 * @returns {mat4} out
 */


function transpose(out, a) {
  // If we are transposing ourselves we can skip a few steps but have to cache some values
  if (out === a) {
    var a01 = a[1],
        a02 = a[2],
        a03 = a[3];
    var a12 = a[6],
        a13 = a[7];
    var a23 = a[11];
    out[1] = a[4];
    out[2] = a[8];
    out[3] = a[12];
    out[4] = a01;
    out[6] = a[9];
    out[7] = a[13];
    out[8] = a02;
    out[9] = a12;
    out[11] = a[14];
    out[12] = a03;
    out[13] = a13;
    out[14] = a23;
  } else {
    out[0] = a[0];
    out[1] = a[4];
    out[2] = a[8];
    out[3] = a[12];
    out[4] = a[1];
    out[5] = a[5];
    out[6] = a[9];
    out[7] = a[13];
    out[8] = a[2];
    out[9] = a[6];
    out[10] = a[10];
    out[11] = a[14];
    out[12] = a[3];
    out[13] = a[7];
    out[14] = a[11];
    out[15] = a[15];
  }

  return out;
}
/**
 * Inverts a mat4
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the source matrix
 * @returns {mat4} out
 */


function invert(out, a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a03 = a[3];
  var a10 = a[4],
      a11 = a[5],
      a12 = a[6],
      a13 = a[7];
  var a20 = a[8],
      a21 = a[9],
      a22 = a[10],
      a23 = a[11];
  var a30 = a[12],
      a31 = a[13],
      a32 = a[14],
      a33 = a[15];
  var b00 = a00 * a11 - a01 * a10;
  var b01 = a00 * a12 - a02 * a10;
  var b02 = a00 * a13 - a03 * a10;
  var b03 = a01 * a12 - a02 * a11;
  var b04 = a01 * a13 - a03 * a11;
  var b05 = a02 * a13 - a03 * a12;
  var b06 = a20 * a31 - a21 * a30;
  var b07 = a20 * a32 - a22 * a30;
  var b08 = a20 * a33 - a23 * a30;
  var b09 = a21 * a32 - a22 * a31;
  var b10 = a21 * a33 - a23 * a31;
  var b11 = a22 * a33 - a23 * a32; // Calculate the determinant

  var det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;

  if (!det) {
    return null;
  }

  det = 1.0 / det;
  out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;
  out[1] = (a02 * b10 - a01 * b11 - a03 * b09) * det;
  out[2] = (a31 * b05 - a32 * b04 + a33 * b03) * det;
  out[3] = (a22 * b04 - a21 * b05 - a23 * b03) * det;
  out[4] = (a12 * b08 - a10 * b11 - a13 * b07) * det;
  out[5] = (a00 * b11 - a02 * b08 + a03 * b07) * det;
  out[6] = (a32 * b02 - a30 * b05 - a33 * b01) * det;
  out[7] = (a20 * b05 - a22 * b02 + a23 * b01) * det;
  out[8] = (a10 * b10 - a11 * b08 + a13 * b06) * det;
  out[9] = (a01 * b08 - a00 * b10 - a03 * b06) * det;
  out[10] = (a30 * b04 - a31 * b02 + a33 * b00) * det;
  out[11] = (a21 * b02 - a20 * b04 - a23 * b00) * det;
  out[12] = (a11 * b07 - a10 * b09 - a12 * b06) * det;
  out[13] = (a00 * b09 - a01 * b07 + a02 * b06) * det;
  out[14] = (a31 * b01 - a30 * b03 - a32 * b00) * det;
  out[15] = (a20 * b03 - a21 * b01 + a22 * b00) * det;
  return out;
}
/**
 * Calculates the adjugate of a mat4
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the source matrix
 * @returns {mat4} out
 */


function adjoint(out, a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a03 = a[3];
  var a10 = a[4],
      a11 = a[5],
      a12 = a[6],
      a13 = a[7];
  var a20 = a[8],
      a21 = a[9],
      a22 = a[10],
      a23 = a[11];
  var a30 = a[12],
      a31 = a[13],
      a32 = a[14],
      a33 = a[15];
  out[0] = a11 * (a22 * a33 - a23 * a32) - a21 * (a12 * a33 - a13 * a32) + a31 * (a12 * a23 - a13 * a22);
  out[1] = -(a01 * (a22 * a33 - a23 * a32) - a21 * (a02 * a33 - a03 * a32) + a31 * (a02 * a23 - a03 * a22));
  out[2] = a01 * (a12 * a33 - a13 * a32) - a11 * (a02 * a33 - a03 * a32) + a31 * (a02 * a13 - a03 * a12);
  out[3] = -(a01 * (a12 * a23 - a13 * a22) - a11 * (a02 * a23 - a03 * a22) + a21 * (a02 * a13 - a03 * a12));
  out[4] = -(a10 * (a22 * a33 - a23 * a32) - a20 * (a12 * a33 - a13 * a32) + a30 * (a12 * a23 - a13 * a22));
  out[5] = a00 * (a22 * a33 - a23 * a32) - a20 * (a02 * a33 - a03 * a32) + a30 * (a02 * a23 - a03 * a22);
  out[6] = -(a00 * (a12 * a33 - a13 * a32) - a10 * (a02 * a33 - a03 * a32) + a30 * (a02 * a13 - a03 * a12));
  out[7] = a00 * (a12 * a23 - a13 * a22) - a10 * (a02 * a23 - a03 * a22) + a20 * (a02 * a13 - a03 * a12);
  out[8] = a10 * (a21 * a33 - a23 * a31) - a20 * (a11 * a33 - a13 * a31) + a30 * (a11 * a23 - a13 * a21);
  out[9] = -(a00 * (a21 * a33 - a23 * a31) - a20 * (a01 * a33 - a03 * a31) + a30 * (a01 * a23 - a03 * a21));
  out[10] = a00 * (a11 * a33 - a13 * a31) - a10 * (a01 * a33 - a03 * a31) + a30 * (a01 * a13 - a03 * a11);
  out[11] = -(a00 * (a11 * a23 - a13 * a21) - a10 * (a01 * a23 - a03 * a21) + a20 * (a01 * a13 - a03 * a11));
  out[12] = -(a10 * (a21 * a32 - a22 * a31) - a20 * (a11 * a32 - a12 * a31) + a30 * (a11 * a22 - a12 * a21));
  out[13] = a00 * (a21 * a32 - a22 * a31) - a20 * (a01 * a32 - a02 * a31) + a30 * (a01 * a22 - a02 * a21);
  out[14] = -(a00 * (a11 * a32 - a12 * a31) - a10 * (a01 * a32 - a02 * a31) + a30 * (a01 * a12 - a02 * a11));
  out[15] = a00 * (a11 * a22 - a12 * a21) - a10 * (a01 * a22 - a02 * a21) + a20 * (a01 * a12 - a02 * a11);
  return out;
}
/**
 * Calculates the determinant of a mat4
 *
 * @param {ReadonlyMat4} a the source matrix
 * @returns {Number} determinant of a
 */


function determinant(a) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a03 = a[3];
  var a10 = a[4],
      a11 = a[5],
      a12 = a[6],
      a13 = a[7];
  var a20 = a[8],
      a21 = a[9],
      a22 = a[10],
      a23 = a[11];
  var a30 = a[12],
      a31 = a[13],
      a32 = a[14],
      a33 = a[15];
  var b00 = a00 * a11 - a01 * a10;
  var b01 = a00 * a12 - a02 * a10;
  var b02 = a00 * a13 - a03 * a10;
  var b03 = a01 * a12 - a02 * a11;
  var b04 = a01 * a13 - a03 * a11;
  var b05 = a02 * a13 - a03 * a12;
  var b06 = a20 * a31 - a21 * a30;
  var b07 = a20 * a32 - a22 * a30;
  var b08 = a20 * a33 - a23 * a30;
  var b09 = a21 * a32 - a22 * a31;
  var b10 = a21 * a33 - a23 * a31;
  var b11 = a22 * a33 - a23 * a32; // Calculate the determinant

  return b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
}
/**
 * Multiplies two mat4s
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the first operand
 * @param {ReadonlyMat4} b the second operand
 * @returns {mat4} out
 */


function multiply(out, a, b) {
  var a00 = a[0],
      a01 = a[1],
      a02 = a[2],
      a03 = a[3];
  var a10 = a[4],
      a11 = a[5],
      a12 = a[6],
      a13 = a[7];
  var a20 = a[8],
      a21 = a[9],
      a22 = a[10],
      a23 = a[11];
  var a30 = a[12],
      a31 = a[13],
      a32 = a[14],
      a33 = a[15]; // Cache only the current line of the second matrix

  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3];
  out[0] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
  out[1] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
  out[2] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
  out[3] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
  b0 = b[4];
  b1 = b[5];
  b2 = b[6];
  b3 = b[7];
  out[4] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
  out[5] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
  out[6] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
  out[7] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
  b0 = b[8];
  b1 = b[9];
  b2 = b[10];
  b3 = b[11];
  out[8] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
  out[9] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
  out[10] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
  out[11] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
  b0 = b[12];
  b1 = b[13];
  b2 = b[14];
  b3 = b[15];
  out[12] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
  out[13] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
  out[14] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
  out[15] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
  return out;
}
/**
 * Translate a mat4 by the given vector
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to translate
 * @param {ReadonlyVec3} v vector to translate by
 * @returns {mat4} out
 */


function translate(out, a, v) {
  var x = v[0],
      y = v[1],
      z = v[2];
  var a00, a01, a02, a03;
  var a10, a11, a12, a13;
  var a20, a21, a22, a23;

  if (a === out) {
    out[12] = a[0] * x + a[4] * y + a[8] * z + a[12];
    out[13] = a[1] * x + a[5] * y + a[9] * z + a[13];
    out[14] = a[2] * x + a[6] * y + a[10] * z + a[14];
    out[15] = a[3] * x + a[7] * y + a[11] * z + a[15];
  } else {
    a00 = a[0];
    a01 = a[1];
    a02 = a[2];
    a03 = a[3];
    a10 = a[4];
    a11 = a[5];
    a12 = a[6];
    a13 = a[7];
    a20 = a[8];
    a21 = a[9];
    a22 = a[10];
    a23 = a[11];
    out[0] = a00;
    out[1] = a01;
    out[2] = a02;
    out[3] = a03;
    out[4] = a10;
    out[5] = a11;
    out[6] = a12;
    out[7] = a13;
    out[8] = a20;
    out[9] = a21;
    out[10] = a22;
    out[11] = a23;
    out[12] = a00 * x + a10 * y + a20 * z + a[12];
    out[13] = a01 * x + a11 * y + a21 * z + a[13];
    out[14] = a02 * x + a12 * y + a22 * z + a[14];
    out[15] = a03 * x + a13 * y + a23 * z + a[15];
  }

  return out;
}
/**
 * Scales the mat4 by the dimensions in the given vec3 not using vectorization
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to scale
 * @param {ReadonlyVec3} v the vec3 to scale the matrix by
 * @returns {mat4} out
 **/


function scale(out, a, v) {
  var x = v[0],
      y = v[1],
      z = v[2];
  out[0] = a[0] * x;
  out[1] = a[1] * x;
  out[2] = a[2] * x;
  out[3] = a[3] * x;
  out[4] = a[4] * y;
  out[5] = a[5] * y;
  out[6] = a[6] * y;
  out[7] = a[7] * y;
  out[8] = a[8] * z;
  out[9] = a[9] * z;
  out[10] = a[10] * z;
  out[11] = a[11] * z;
  out[12] = a[12];
  out[13] = a[13];
  out[14] = a[14];
  out[15] = a[15];
  return out;
}
/**
 * Rotates a mat4 by the given angle around the given axis
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @param {ReadonlyVec3} axis the axis to rotate around
 * @returns {mat4} out
 */


function rotate(out, a, rad, axis) {
  var x = axis[0],
      y = axis[1],
      z = axis[2];
  var len = Math.hypot(x, y, z);
  var s, c, t;
  var a00, a01, a02, a03;
  var a10, a11, a12, a13;
  var a20, a21, a22, a23;
  var b00, b01, b02;
  var b10, b11, b12;
  var b20, b21, b22;

  if (len < glMatrix.EPSILON) {
    return null;
  }

  len = 1 / len;
  x *= len;
  y *= len;
  z *= len;
  s = Math.sin(rad);
  c = Math.cos(rad);
  t = 1 - c;
  a00 = a[0];
  a01 = a[1];
  a02 = a[2];
  a03 = a[3];
  a10 = a[4];
  a11 = a[5];
  a12 = a[6];
  a13 = a[7];
  a20 = a[8];
  a21 = a[9];
  a22 = a[10];
  a23 = a[11]; // Construct the elements of the rotation matrix

  b00 = x * x * t + c;
  b01 = y * x * t + z * s;
  b02 = z * x * t - y * s;
  b10 = x * y * t - z * s;
  b11 = y * y * t + c;
  b12 = z * y * t + x * s;
  b20 = x * z * t + y * s;
  b21 = y * z * t - x * s;
  b22 = z * z * t + c; // Perform rotation-specific matrix multiplication

  out[0] = a00 * b00 + a10 * b01 + a20 * b02;
  out[1] = a01 * b00 + a11 * b01 + a21 * b02;
  out[2] = a02 * b00 + a12 * b01 + a22 * b02;
  out[3] = a03 * b00 + a13 * b01 + a23 * b02;
  out[4] = a00 * b10 + a10 * b11 + a20 * b12;
  out[5] = a01 * b10 + a11 * b11 + a21 * b12;
  out[6] = a02 * b10 + a12 * b11 + a22 * b12;
  out[7] = a03 * b10 + a13 * b11 + a23 * b12;
  out[8] = a00 * b20 + a10 * b21 + a20 * b22;
  out[9] = a01 * b20 + a11 * b21 + a21 * b22;
  out[10] = a02 * b20 + a12 * b21 + a22 * b22;
  out[11] = a03 * b20 + a13 * b21 + a23 * b22;

  if (a !== out) {
    // If the source and destination differ, copy the unchanged last row
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
  }

  return out;
}
/**
 * Rotates a matrix by the given angle around the X axis
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat4} out
 */


function rotateX(out, a, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad);
  var a10 = a[4];
  var a11 = a[5];
  var a12 = a[6];
  var a13 = a[7];
  var a20 = a[8];
  var a21 = a[9];
  var a22 = a[10];
  var a23 = a[11];

  if (a !== out) {
    // If the source and destination differ, copy the unchanged rows
    out[0] = a[0];
    out[1] = a[1];
    out[2] = a[2];
    out[3] = a[3];
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
  } // Perform axis-specific matrix multiplication


  out[4] = a10 * c + a20 * s;
  out[5] = a11 * c + a21 * s;
  out[6] = a12 * c + a22 * s;
  out[7] = a13 * c + a23 * s;
  out[8] = a20 * c - a10 * s;
  out[9] = a21 * c - a11 * s;
  out[10] = a22 * c - a12 * s;
  out[11] = a23 * c - a13 * s;
  return out;
}
/**
 * Rotates a matrix by the given angle around the Y axis
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat4} out
 */


function rotateY(out, a, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad);
  var a00 = a[0];
  var a01 = a[1];
  var a02 = a[2];
  var a03 = a[3];
  var a20 = a[8];
  var a21 = a[9];
  var a22 = a[10];
  var a23 = a[11];

  if (a !== out) {
    // If the source and destination differ, copy the unchanged rows
    out[4] = a[4];
    out[5] = a[5];
    out[6] = a[6];
    out[7] = a[7];
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
  } // Perform axis-specific matrix multiplication


  out[0] = a00 * c - a20 * s;
  out[1] = a01 * c - a21 * s;
  out[2] = a02 * c - a22 * s;
  out[3] = a03 * c - a23 * s;
  out[8] = a00 * s + a20 * c;
  out[9] = a01 * s + a21 * c;
  out[10] = a02 * s + a22 * c;
  out[11] = a03 * s + a23 * c;
  return out;
}
/**
 * Rotates a matrix by the given angle around the Z axis
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to rotate
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat4} out
 */


function rotateZ(out, a, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad);
  var a00 = a[0];
  var a01 = a[1];
  var a02 = a[2];
  var a03 = a[3];
  var a10 = a[4];
  var a11 = a[5];
  var a12 = a[6];
  var a13 = a[7];

  if (a !== out) {
    // If the source and destination differ, copy the unchanged last row
    out[8] = a[8];
    out[9] = a[9];
    out[10] = a[10];
    out[11] = a[11];
    out[12] = a[12];
    out[13] = a[13];
    out[14] = a[14];
    out[15] = a[15];
  } // Perform axis-specific matrix multiplication


  out[0] = a00 * c + a10 * s;
  out[1] = a01 * c + a11 * s;
  out[2] = a02 * c + a12 * s;
  out[3] = a03 * c + a13 * s;
  out[4] = a10 * c - a00 * s;
  out[5] = a11 * c - a01 * s;
  out[6] = a12 * c - a02 * s;
  out[7] = a13 * c - a03 * s;
  return out;
}
/**
 * Creates a matrix from a vector translation
 * This is equivalent to (but much faster than):
 *
 *     mat4.identity(dest);
 *     mat4.translate(dest, dest, vec);
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {ReadonlyVec3} v Translation vector
 * @returns {mat4} out
 */


function fromTranslation(out, v) {
  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = 1;
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[10] = 1;
  out[11] = 0;
  out[12] = v[0];
  out[13] = v[1];
  out[14] = v[2];
  out[15] = 1;
  return out;
}
/**
 * Creates a matrix from a vector scaling
 * This is equivalent to (but much faster than):
 *
 *     mat4.identity(dest);
 *     mat4.scale(dest, dest, vec);
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {ReadonlyVec3} v Scaling vector
 * @returns {mat4} out
 */


function fromScaling(out, v) {
  out[0] = v[0];
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = v[1];
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[10] = v[2];
  out[11] = 0;
  out[12] = 0;
  out[13] = 0;
  out[14] = 0;
  out[15] = 1;
  return out;
}
/**
 * Creates a matrix from a given angle around a given axis
 * This is equivalent to (but much faster than):
 *
 *     mat4.identity(dest);
 *     mat4.rotate(dest, dest, rad, axis);
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {Number} rad the angle to rotate the matrix by
 * @param {ReadonlyVec3} axis the axis to rotate around
 * @returns {mat4} out
 */


function fromRotation(out, rad, axis) {
  var x = axis[0],
      y = axis[1],
      z = axis[2];
  var len = Math.hypot(x, y, z);
  var s, c, t;

  if (len < glMatrix.EPSILON) {
    return null;
  }

  len = 1 / len;
  x *= len;
  y *= len;
  z *= len;
  s = Math.sin(rad);
  c = Math.cos(rad);
  t = 1 - c; // Perform rotation-specific matrix multiplication

  out[0] = x * x * t + c;
  out[1] = y * x * t + z * s;
  out[2] = z * x * t - y * s;
  out[3] = 0;
  out[4] = x * y * t - z * s;
  out[5] = y * y * t + c;
  out[6] = z * y * t + x * s;
  out[7] = 0;
  out[8] = x * z * t + y * s;
  out[9] = y * z * t - x * s;
  out[10] = z * z * t + c;
  out[11] = 0;
  out[12] = 0;
  out[13] = 0;
  out[14] = 0;
  out[15] = 1;
  return out;
}
/**
 * Creates a matrix from the given angle around the X axis
 * This is equivalent to (but much faster than):
 *
 *     mat4.identity(dest);
 *     mat4.rotateX(dest, dest, rad);
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat4} out
 */


function fromXRotation(out, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad); // Perform axis-specific matrix multiplication

  out[0] = 1;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = c;
  out[6] = s;
  out[7] = 0;
  out[8] = 0;
  out[9] = -s;
  out[10] = c;
  out[11] = 0;
  out[12] = 0;
  out[13] = 0;
  out[14] = 0;
  out[15] = 1;
  return out;
}
/**
 * Creates a matrix from the given angle around the Y axis
 * This is equivalent to (but much faster than):
 *
 *     mat4.identity(dest);
 *     mat4.rotateY(dest, dest, rad);
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat4} out
 */


function fromYRotation(out, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad); // Perform axis-specific matrix multiplication

  out[0] = c;
  out[1] = 0;
  out[2] = -s;
  out[3] = 0;
  out[4] = 0;
  out[5] = 1;
  out[6] = 0;
  out[7] = 0;
  out[8] = s;
  out[9] = 0;
  out[10] = c;
  out[11] = 0;
  out[12] = 0;
  out[13] = 0;
  out[14] = 0;
  out[15] = 1;
  return out;
}
/**
 * Creates a matrix from the given angle around the Z axis
 * This is equivalent to (but much faster than):
 *
 *     mat4.identity(dest);
 *     mat4.rotateZ(dest, dest, rad);
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {Number} rad the angle to rotate the matrix by
 * @returns {mat4} out
 */


function fromZRotation(out, rad) {
  var s = Math.sin(rad);
  var c = Math.cos(rad); // Perform axis-specific matrix multiplication

  out[0] = c;
  out[1] = s;
  out[2] = 0;
  out[3] = 0;
  out[4] = -s;
  out[5] = c;
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[10] = 1;
  out[11] = 0;
  out[12] = 0;
  out[13] = 0;
  out[14] = 0;
  out[15] = 1;
  return out;
}
/**
 * Creates a matrix from a quaternion rotation and vector translation
 * This is equivalent to (but much faster than):
 *
 *     mat4.identity(dest);
 *     mat4.translate(dest, vec);
 *     let quatMat = mat4.create();
 *     quat4.toMat4(quat, quatMat);
 *     mat4.multiply(dest, quatMat);
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {quat4} q Rotation quaternion
 * @param {ReadonlyVec3} v Translation vector
 * @returns {mat4} out
 */


function fromRotationTranslation(out, q, v) {
  // Quaternion math
  var x = q[0],
      y = q[1],
      z = q[2],
      w = q[3];
  var x2 = x + x;
  var y2 = y + y;
  var z2 = z + z;
  var xx = x * x2;
  var xy = x * y2;
  var xz = x * z2;
  var yy = y * y2;
  var yz = y * z2;
  var zz = z * z2;
  var wx = w * x2;
  var wy = w * y2;
  var wz = w * z2;
  out[0] = 1 - (yy + zz);
  out[1] = xy + wz;
  out[2] = xz - wy;
  out[3] = 0;
  out[4] = xy - wz;
  out[5] = 1 - (xx + zz);
  out[6] = yz + wx;
  out[7] = 0;
  out[8] = xz + wy;
  out[9] = yz - wx;
  out[10] = 1 - (xx + yy);
  out[11] = 0;
  out[12] = v[0];
  out[13] = v[1];
  out[14] = v[2];
  out[15] = 1;
  return out;
}
/**
 * Creates a new mat4 from a dual quat.
 *
 * @param {mat4} out Matrix
 * @param {ReadonlyQuat2} a Dual Quaternion
 * @returns {mat4} mat4 receiving operation result
 */


function fromQuat2(out, a) {
  var translation = new glMatrix.ARRAY_TYPE(3);
  var bx = -a[0],
      by = -a[1],
      bz = -a[2],
      bw = a[3],
      ax = a[4],
      ay = a[5],
      az = a[6],
      aw = a[7];
  var magnitude = bx * bx + by * by + bz * bz + bw * bw; //Only scale if it makes sense

  if (magnitude > 0) {
    translation[0] = (ax * bw + aw * bx + ay * bz - az * by) * 2 / magnitude;
    translation[1] = (ay * bw + aw * by + az * bx - ax * bz) * 2 / magnitude;
    translation[2] = (az * bw + aw * bz + ax * by - ay * bx) * 2 / magnitude;
  } else {
    translation[0] = (ax * bw + aw * bx + ay * bz - az * by) * 2;
    translation[1] = (ay * bw + aw * by + az * bx - ax * bz) * 2;
    translation[2] = (az * bw + aw * bz + ax * by - ay * bx) * 2;
  }

  fromRotationTranslation(out, a, translation);
  return out;
}
/**
 * Returns the translation vector component of a transformation
 *  matrix. If a matrix is built with fromRotationTranslation,
 *  the returned vector will be the same as the translation vector
 *  originally supplied.
 * @param  {vec3} out Vector to receive translation component
 * @param  {ReadonlyMat4} mat Matrix to be decomposed (input)
 * @return {vec3} out
 */


function getTranslation(out, mat) {
  out[0] = mat[12];
  out[1] = mat[13];
  out[2] = mat[14];
  return out;
}
/**
 * Returns the scaling factor component of a transformation
 *  matrix. If a matrix is built with fromRotationTranslationScale
 *  with a normalized Quaternion paramter, the returned vector will be
 *  the same as the scaling vector
 *  originally supplied.
 * @param  {vec3} out Vector to receive scaling factor component
 * @param  {ReadonlyMat4} mat Matrix to be decomposed (input)
 * @return {vec3} out
 */


function getScaling(out, mat) {
  var m11 = mat[0];
  var m12 = mat[1];
  var m13 = mat[2];
  var m21 = mat[4];
  var m22 = mat[5];
  var m23 = mat[6];
  var m31 = mat[8];
  var m32 = mat[9];
  var m33 = mat[10];
  out[0] = Math.hypot(m11, m12, m13);
  out[1] = Math.hypot(m21, m22, m23);
  out[2] = Math.hypot(m31, m32, m33);
  return out;
}
/**
 * Returns a quaternion representing the rotational component
 *  of a transformation matrix. If a matrix is built with
 *  fromRotationTranslation, the returned quaternion will be the
 *  same as the quaternion originally supplied.
 * @param {quat} out Quaternion to receive the rotation component
 * @param {ReadonlyMat4} mat Matrix to be decomposed (input)
 * @return {quat} out
 */


function getRotation(out, mat) {
  var scaling = new glMatrix.ARRAY_TYPE(3);
  getScaling(scaling, mat);
  var is1 = 1 / scaling[0];
  var is2 = 1 / scaling[1];
  var is3 = 1 / scaling[2];
  var sm11 = mat[0] * is1;
  var sm12 = mat[1] * is2;
  var sm13 = mat[2] * is3;
  var sm21 = mat[4] * is1;
  var sm22 = mat[5] * is2;
  var sm23 = mat[6] * is3;
  var sm31 = mat[8] * is1;
  var sm32 = mat[9] * is2;
  var sm33 = mat[10] * is3;
  var trace = sm11 + sm22 + sm33;
  var S = 0;

  if (trace > 0) {
    S = Math.sqrt(trace + 1.0) * 2;
    out[3] = 0.25 * S;
    out[0] = (sm23 - sm32) / S;
    out[1] = (sm31 - sm13) / S;
    out[2] = (sm12 - sm21) / S;
  } else if (sm11 > sm22 && sm11 > sm33) {
    S = Math.sqrt(1.0 + sm11 - sm22 - sm33) * 2;
    out[3] = (sm23 - sm32) / S;
    out[0] = 0.25 * S;
    out[1] = (sm12 + sm21) / S;
    out[2] = (sm31 + sm13) / S;
  } else if (sm22 > sm33) {
    S = Math.sqrt(1.0 + sm22 - sm11 - sm33) * 2;
    out[3] = (sm31 - sm13) / S;
    out[0] = (sm12 + sm21) / S;
    out[1] = 0.25 * S;
    out[2] = (sm23 + sm32) / S;
  } else {
    S = Math.sqrt(1.0 + sm33 - sm11 - sm22) * 2;
    out[3] = (sm12 - sm21) / S;
    out[0] = (sm31 + sm13) / S;
    out[1] = (sm23 + sm32) / S;
    out[2] = 0.25 * S;
  }

  return out;
}
/**
 * Creates a matrix from a quaternion rotation, vector translation and vector scale
 * This is equivalent to (but much faster than):
 *
 *     mat4.identity(dest);
 *     mat4.translate(dest, vec);
 *     let quatMat = mat4.create();
 *     quat4.toMat4(quat, quatMat);
 *     mat4.multiply(dest, quatMat);
 *     mat4.scale(dest, scale)
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {quat4} q Rotation quaternion
 * @param {ReadonlyVec3} v Translation vector
 * @param {ReadonlyVec3} s Scaling vector
 * @returns {mat4} out
 */


function fromRotationTranslationScale(out, q, v, s) {
  // Quaternion math
  var x = q[0],
      y = q[1],
      z = q[2],
      w = q[3];
  var x2 = x + x;
  var y2 = y + y;
  var z2 = z + z;
  var xx = x * x2;
  var xy = x * y2;
  var xz = x * z2;
  var yy = y * y2;
  var yz = y * z2;
  var zz = z * z2;
  var wx = w * x2;
  var wy = w * y2;
  var wz = w * z2;
  var sx = s[0];
  var sy = s[1];
  var sz = s[2];
  out[0] = (1 - (yy + zz)) * sx;
  out[1] = (xy + wz) * sx;
  out[2] = (xz - wy) * sx;
  out[3] = 0;
  out[4] = (xy - wz) * sy;
  out[5] = (1 - (xx + zz)) * sy;
  out[6] = (yz + wx) * sy;
  out[7] = 0;
  out[8] = (xz + wy) * sz;
  out[9] = (yz - wx) * sz;
  out[10] = (1 - (xx + yy)) * sz;
  out[11] = 0;
  out[12] = v[0];
  out[13] = v[1];
  out[14] = v[2];
  out[15] = 1;
  return out;
}
/**
 * Creates a matrix from a quaternion rotation, vector translation and vector scale, rotating and scaling around the given origin
 * This is equivalent to (but much faster than):
 *
 *     mat4.identity(dest);
 *     mat4.translate(dest, vec);
 *     mat4.translate(dest, origin);
 *     let quatMat = mat4.create();
 *     quat4.toMat4(quat, quatMat);
 *     mat4.multiply(dest, quatMat);
 *     mat4.scale(dest, scale)
 *     mat4.translate(dest, negativeOrigin);
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {quat4} q Rotation quaternion
 * @param {ReadonlyVec3} v Translation vector
 * @param {ReadonlyVec3} s Scaling vector
 * @param {ReadonlyVec3} o The origin vector around which to scale and rotate
 * @returns {mat4} out
 */


function fromRotationTranslationScaleOrigin(out, q, v, s, o) {
  // Quaternion math
  var x = q[0],
      y = q[1],
      z = q[2],
      w = q[3];
  var x2 = x + x;
  var y2 = y + y;
  var z2 = z + z;
  var xx = x * x2;
  var xy = x * y2;
  var xz = x * z2;
  var yy = y * y2;
  var yz = y * z2;
  var zz = z * z2;
  var wx = w * x2;
  var wy = w * y2;
  var wz = w * z2;
  var sx = s[0];
  var sy = s[1];
  var sz = s[2];
  var ox = o[0];
  var oy = o[1];
  var oz = o[2];
  var out0 = (1 - (yy + zz)) * sx;
  var out1 = (xy + wz) * sx;
  var out2 = (xz - wy) * sx;
  var out4 = (xy - wz) * sy;
  var out5 = (1 - (xx + zz)) * sy;
  var out6 = (yz + wx) * sy;
  var out8 = (xz + wy) * sz;
  var out9 = (yz - wx) * sz;
  var out10 = (1 - (xx + yy)) * sz;
  out[0] = out0;
  out[1] = out1;
  out[2] = out2;
  out[3] = 0;
  out[4] = out4;
  out[5] = out5;
  out[6] = out6;
  out[7] = 0;
  out[8] = out8;
  out[9] = out9;
  out[10] = out10;
  out[11] = 0;
  out[12] = v[0] + ox - (out0 * ox + out4 * oy + out8 * oz);
  out[13] = v[1] + oy - (out1 * ox + out5 * oy + out9 * oz);
  out[14] = v[2] + oz - (out2 * ox + out6 * oy + out10 * oz);
  out[15] = 1;
  return out;
}
/**
 * Calculates a 4x4 matrix from the given quaternion
 *
 * @param {mat4} out mat4 receiving operation result
 * @param {ReadonlyQuat} q Quaternion to create matrix from
 *
 * @returns {mat4} out
 */


function fromQuat(out, q) {
  var x = q[0],
      y = q[1],
      z = q[2],
      w = q[3];
  var x2 = x + x;
  var y2 = y + y;
  var z2 = z + z;
  var xx = x * x2;
  var yx = y * x2;
  var yy = y * y2;
  var zx = z * x2;
  var zy = z * y2;
  var zz = z * z2;
  var wx = w * x2;
  var wy = w * y2;
  var wz = w * z2;
  out[0] = 1 - yy - zz;
  out[1] = yx + wz;
  out[2] = zx - wy;
  out[3] = 0;
  out[4] = yx - wz;
  out[5] = 1 - xx - zz;
  out[6] = zy + wx;
  out[7] = 0;
  out[8] = zx + wy;
  out[9] = zy - wx;
  out[10] = 1 - xx - yy;
  out[11] = 0;
  out[12] = 0;
  out[13] = 0;
  out[14] = 0;
  out[15] = 1;
  return out;
}
/**
 * Generates a frustum matrix with the given bounds
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {Number} left Left bound of the frustum
 * @param {Number} right Right bound of the frustum
 * @param {Number} bottom Bottom bound of the frustum
 * @param {Number} top Top bound of the frustum
 * @param {Number} near Near bound of the frustum
 * @param {Number} far Far bound of the frustum
 * @returns {mat4} out
 */


function frustum(out, left, right, bottom, top, near, far) {
  var rl = 1 / (right - left);
  var tb = 1 / (top - bottom);
  var nf = 1 / (near - far);
  out[0] = near * 2 * rl;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = near * 2 * tb;
  out[6] = 0;
  out[7] = 0;
  out[8] = (right + left) * rl;
  out[9] = (top + bottom) * tb;
  out[10] = (far + near) * nf;
  out[11] = -1;
  out[12] = 0;
  out[13] = 0;
  out[14] = far * near * 2 * nf;
  out[15] = 0;
  return out;
}
/**
 * Generates a perspective projection matrix with the given bounds.
 * Passing null/undefined/no value for far will generate infinite projection matrix.
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {number} fovy Vertical field of view in radians
 * @param {number} aspect Aspect ratio. typically viewport width/height
 * @param {number} near Near bound of the frustum
 * @param {number} far Far bound of the frustum, can be null or Infinity
 * @returns {mat4} out
 */


function perspective(out, fovy, aspect, near, far) {
  var f = 1.0 / Math.tan(fovy / 2),
      nf;
  out[0] = f / aspect;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = f;
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[11] = -1;
  out[12] = 0;
  out[13] = 0;
  out[15] = 0;

  if (far != null && far !== Infinity) {
    nf = 1 / (near - far);
    out[10] = (far + near) * nf;
    out[14] = 2 * far * near * nf;
  } else {
    out[10] = -1;
    out[14] = -2 * near;
  }

  return out;
}
/**
 * Generates a perspective projection matrix with the given field of view.
 * This is primarily useful for generating projection matrices to be used
 * with the still experiemental WebVR API.
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {Object} fov Object containing the following values: upDegrees, downDegrees, leftDegrees, rightDegrees
 * @param {number} near Near bound of the frustum
 * @param {number} far Far bound of the frustum
 * @returns {mat4} out
 */


function perspectiveFromFieldOfView(out, fov, near, far) {
  var upTan = Math.tan(fov.upDegrees * Math.PI / 180.0);
  var downTan = Math.tan(fov.downDegrees * Math.PI / 180.0);
  var leftTan = Math.tan(fov.leftDegrees * Math.PI / 180.0);
  var rightTan = Math.tan(fov.rightDegrees * Math.PI / 180.0);
  var xScale = 2.0 / (leftTan + rightTan);
  var yScale = 2.0 / (upTan + downTan);
  out[0] = xScale;
  out[1] = 0.0;
  out[2] = 0.0;
  out[3] = 0.0;
  out[4] = 0.0;
  out[5] = yScale;
  out[6] = 0.0;
  out[7] = 0.0;
  out[8] = -((leftTan - rightTan) * xScale * 0.5);
  out[9] = (upTan - downTan) * yScale * 0.5;
  out[10] = far / (near - far);
  out[11] = -1.0;
  out[12] = 0.0;
  out[13] = 0.0;
  out[14] = far * near / (near - far);
  out[15] = 0.0;
  return out;
}
/**
 * Generates a orthogonal projection matrix with the given bounds
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {number} left Left bound of the frustum
 * @param {number} right Right bound of the frustum
 * @param {number} bottom Bottom bound of the frustum
 * @param {number} top Top bound of the frustum
 * @param {number} near Near bound of the frustum
 * @param {number} far Far bound of the frustum
 * @returns {mat4} out
 */


function ortho(out, left, right, bottom, top, near, far) {
  var lr = 1 / (left - right);
  var bt = 1 / (bottom - top);
  var nf = 1 / (near - far);
  out[0] = -2 * lr;
  out[1] = 0;
  out[2] = 0;
  out[3] = 0;
  out[4] = 0;
  out[5] = -2 * bt;
  out[6] = 0;
  out[7] = 0;
  out[8] = 0;
  out[9] = 0;
  out[10] = 2 * nf;
  out[11] = 0;
  out[12] = (left + right) * lr;
  out[13] = (top + bottom) * bt;
  out[14] = (far + near) * nf;
  out[15] = 1;
  return out;
}
/**
 * Generates a look-at matrix with the given eye position, focal point, and up axis.
 * If you want a matrix that actually makes an object look at another object, you should use targetTo instead.
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {ReadonlyVec3} eye Position of the viewer
 * @param {ReadonlyVec3} center Point the viewer is looking at
 * @param {ReadonlyVec3} up vec3 pointing up
 * @returns {mat4} out
 */


function lookAt(out, eye, center, up) {
  var x0, x1, x2, y0, y1, y2, z0, z1, z2, len;
  var eyex = eye[0];
  var eyey = eye[1];
  var eyez = eye[2];
  var upx = up[0];
  var upy = up[1];
  var upz = up[2];
  var centerx = center[0];
  var centery = center[1];
  var centerz = center[2];

  if (Math.abs(eyex - centerx) < glMatrix.EPSILON && Math.abs(eyey - centery) < glMatrix.EPSILON && Math.abs(eyez - centerz) < glMatrix.EPSILON) {
    return identity(out);
  }

  z0 = eyex - centerx;
  z1 = eyey - centery;
  z2 = eyez - centerz;
  len = 1 / Math.hypot(z0, z1, z2);
  z0 *= len;
  z1 *= len;
  z2 *= len;
  x0 = upy * z2 - upz * z1;
  x1 = upz * z0 - upx * z2;
  x2 = upx * z1 - upy * z0;
  len = Math.hypot(x0, x1, x2);

  if (!len) {
    x0 = 0;
    x1 = 0;
    x2 = 0;
  } else {
    len = 1 / len;
    x0 *= len;
    x1 *= len;
    x2 *= len;
  }

  y0 = z1 * x2 - z2 * x1;
  y1 = z2 * x0 - z0 * x2;
  y2 = z0 * x1 - z1 * x0;
  len = Math.hypot(y0, y1, y2);

  if (!len) {
    y0 = 0;
    y1 = 0;
    y2 = 0;
  } else {
    len = 1 / len;
    y0 *= len;
    y1 *= len;
    y2 *= len;
  }

  out[0] = x0;
  out[1] = y0;
  out[2] = z0;
  out[3] = 0;
  out[4] = x1;
  out[5] = y1;
  out[6] = z1;
  out[7] = 0;
  out[8] = x2;
  out[9] = y2;
  out[10] = z2;
  out[11] = 0;
  out[12] = -(x0 * eyex + x1 * eyey + x2 * eyez);
  out[13] = -(y0 * eyex + y1 * eyey + y2 * eyez);
  out[14] = -(z0 * eyex + z1 * eyey + z2 * eyez);
  out[15] = 1;
  return out;
}
/**
 * Generates a matrix that makes something look at something else.
 *
 * @param {mat4} out mat4 frustum matrix will be written into
 * @param {ReadonlyVec3} eye Position of the viewer
 * @param {ReadonlyVec3} center Point the viewer is looking at
 * @param {ReadonlyVec3} up vec3 pointing up
 * @returns {mat4} out
 */


function targetTo(out, eye, target, up) {
  var eyex = eye[0],
      eyey = eye[1],
      eyez = eye[2],
      upx = up[0],
      upy = up[1],
      upz = up[2];
  var z0 = eyex - target[0],
      z1 = eyey - target[1],
      z2 = eyez - target[2];
  var len = z0 * z0 + z1 * z1 + z2 * z2;

  if (len > 0) {
    len = 1 / Math.sqrt(len);
    z0 *= len;
    z1 *= len;
    z2 *= len;
  }

  var x0 = upy * z2 - upz * z1,
      x1 = upz * z0 - upx * z2,
      x2 = upx * z1 - upy * z0;
  len = x0 * x0 + x1 * x1 + x2 * x2;

  if (len > 0) {
    len = 1 / Math.sqrt(len);
    x0 *= len;
    x1 *= len;
    x2 *= len;
  }

  out[0] = x0;
  out[1] = x1;
  out[2] = x2;
  out[3] = 0;
  out[4] = z1 * x2 - z2 * x1;
  out[5] = z2 * x0 - z0 * x2;
  out[6] = z0 * x1 - z1 * x0;
  out[7] = 0;
  out[8] = z0;
  out[9] = z1;
  out[10] = z2;
  out[11] = 0;
  out[12] = eyex;
  out[13] = eyey;
  out[14] = eyez;
  out[15] = 1;
  return out;
}
/**
 * Returns a string representation of a mat4
 *
 * @param {ReadonlyMat4} a matrix to represent as a string
 * @returns {String} string representation of the matrix
 */


function str(a) {
  return "mat4(" + a[0] + ", " + a[1] + ", " + a[2] + ", " + a[3] + ", " + a[4] + ", " + a[5] + ", " + a[6] + ", " + a[7] + ", " + a[8] + ", " + a[9] + ", " + a[10] + ", " + a[11] + ", " + a[12] + ", " + a[13] + ", " + a[14] + ", " + a[15] + ")";
}
/**
 * Returns Frobenius norm of a mat4
 *
 * @param {ReadonlyMat4} a the matrix to calculate Frobenius norm of
 * @returns {Number} Frobenius norm
 */


function frob(a) {
  return Math.hypot(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], a[10], a[11], a[12], a[13], a[14], a[15]);
}
/**
 * Adds two mat4's
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the first operand
 * @param {ReadonlyMat4} b the second operand
 * @returns {mat4} out
 */


function add(out, a, b) {
  out[0] = a[0] + b[0];
  out[1] = a[1] + b[1];
  out[2] = a[2] + b[2];
  out[3] = a[3] + b[3];
  out[4] = a[4] + b[4];
  out[5] = a[5] + b[5];
  out[6] = a[6] + b[6];
  out[7] = a[7] + b[7];
  out[8] = a[8] + b[8];
  out[9] = a[9] + b[9];
  out[10] = a[10] + b[10];
  out[11] = a[11] + b[11];
  out[12] = a[12] + b[12];
  out[13] = a[13] + b[13];
  out[14] = a[14] + b[14];
  out[15] = a[15] + b[15];
  return out;
}
/**
 * Subtracts matrix b from matrix a
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the first operand
 * @param {ReadonlyMat4} b the second operand
 * @returns {mat4} out
 */


function subtract(out, a, b) {
  out[0] = a[0] - b[0];
  out[1] = a[1] - b[1];
  out[2] = a[2] - b[2];
  out[3] = a[3] - b[3];
  out[4] = a[4] - b[4];
  out[5] = a[5] - b[5];
  out[6] = a[6] - b[6];
  out[7] = a[7] - b[7];
  out[8] = a[8] - b[8];
  out[9] = a[9] - b[9];
  out[10] = a[10] - b[10];
  out[11] = a[11] - b[11];
  out[12] = a[12] - b[12];
  out[13] = a[13] - b[13];
  out[14] = a[14] - b[14];
  out[15] = a[15] - b[15];
  return out;
}
/**
 * Multiply each element of the matrix by a scalar.
 *
 * @param {mat4} out the receiving matrix
 * @param {ReadonlyMat4} a the matrix to scale
 * @param {Number} b amount to scale the matrix's elements by
 * @returns {mat4} out
 */


function multiplyScalar(out, a, b) {
  out[0] = a[0] * b;
  out[1] = a[1] * b;
  out[2] = a[2] * b;
  out[3] = a[3] * b;
  out[4] = a[4] * b;
  out[5] = a[5] * b;
  out[6] = a[6] * b;
  out[7] = a[7] * b;
  out[8] = a[8] * b;
  out[9] = a[9] * b;
  out[10] = a[10] * b;
  out[11] = a[11] * b;
  out[12] = a[12] * b;
  out[13] = a[13] * b;
  out[14] = a[14] * b;
  out[15] = a[15] * b;
  return out;
}
/**
 * Adds two mat4's after multiplying each element of the second operand by a scalar value.
 *
 * @param {mat4} out the receiving vector
 * @param {ReadonlyMat4} a the first operand
 * @param {ReadonlyMat4} b the second operand
 * @param {Number} scale the amount to scale b's elements by before adding
 * @returns {mat4} out
 */


function multiplyScalarAndAdd(out, a, b, scale) {
  out[0] = a[0] + b[0] * scale;
  out[1] = a[1] + b[1] * scale;
  out[2] = a[2] + b[2] * scale;
  out[3] = a[3] + b[3] * scale;
  out[4] = a[4] + b[4] * scale;
  out[5] = a[5] + b[5] * scale;
  out[6] = a[6] + b[6] * scale;
  out[7] = a[7] + b[7] * scale;
  out[8] = a[8] + b[8] * scale;
  out[9] = a[9] + b[9] * scale;
  out[10] = a[10] + b[10] * scale;
  out[11] = a[11] + b[11] * scale;
  out[12] = a[12] + b[12] * scale;
  out[13] = a[13] + b[13] * scale;
  out[14] = a[14] + b[14] * scale;
  out[15] = a[15] + b[15] * scale;
  return out;
}
/**
 * Returns whether or not the matrices have exactly the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyMat4} a The first matrix.
 * @param {ReadonlyMat4} b The second matrix.
 * @returns {Boolean} True if the matrices are equal, false otherwise.
 */


function exactEquals(a, b) {
  return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3] && a[4] === b[4] && a[5] === b[5] && a[6] === b[6] && a[7] === b[7] && a[8] === b[8] && a[9] === b[9] && a[10] === b[10] && a[11] === b[11] && a[12] === b[12] && a[13] === b[13] && a[14] === b[14] && a[15] === b[15];
}
/**
 * Returns whether or not the matrices have approximately the same elements in the same position.
 *
 * @param {ReadonlyMat4} a The first matrix.
 * @param {ReadonlyMat4} b The second matrix.
 * @returns {Boolean} True if the matrices are equal, false otherwise.
 */


function equals(a, b) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3];
  var a4 = a[4],
      a5 = a[5],
      a6 = a[6],
      a7 = a[7];
  var a8 = a[8],
      a9 = a[9],
      a10 = a[10],
      a11 = a[11];
  var a12 = a[12],
      a13 = a[13],
      a14 = a[14],
      a15 = a[15];
  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3];
  var b4 = b[4],
      b5 = b[5],
      b6 = b[6],
      b7 = b[7];
  var b8 = b[8],
      b9 = b[9],
      b10 = b[10],
      b11 = b[11];
  var b12 = b[12],
      b13 = b[13],
      b14 = b[14],
      b15 = b[15];
  return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3)) && Math.abs(a4 - b4) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a4), Math.abs(b4)) && Math.abs(a5 - b5) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a5), Math.abs(b5)) && Math.abs(a6 - b6) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a6), Math.abs(b6)) && Math.abs(a7 - b7) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a7), Math.abs(b7)) && Math.abs(a8 - b8) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a8), Math.abs(b8)) && Math.abs(a9 - b9) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a9), Math.abs(b9)) && Math.abs(a10 - b10) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a10), Math.abs(b10)) && Math.abs(a11 - b11) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a11), Math.abs(b11)) && Math.abs(a12 - b12) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a12), Math.abs(b12)) && Math.abs(a13 - b13) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a13), Math.abs(b13)) && Math.abs(a14 - b14) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a14), Math.abs(b14)) && Math.abs(a15 - b15) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a15), Math.abs(b15));
}
/**
 * Alias for {@link mat4.multiply}
 * @function
 */


var mul = multiply;
/**
 * Alias for {@link mat4.subtract}
 * @function
 */

exports.mul = mul;
var sub = subtract;
exports.sub = sub;
},{"./common.js":20}],26:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.identity = identity;
exports.setAxisAngle = setAxisAngle;
exports.getAxisAngle = getAxisAngle;
exports.getAngle = getAngle;
exports.multiply = multiply;
exports.rotateX = rotateX;
exports.rotateY = rotateY;
exports.rotateZ = rotateZ;
exports.calculateW = calculateW;
exports.exp = exp;
exports.ln = ln;
exports.pow = pow;
exports.slerp = slerp;
exports.random = random;
exports.invert = invert;
exports.conjugate = conjugate;
exports.fromMat3 = fromMat3;
exports.fromEuler = fromEuler;
exports.str = str;
exports.setAxes = exports.sqlerp = exports.rotationTo = exports.equals = exports.exactEquals = exports.normalize = exports.sqrLen = exports.squaredLength = exports.len = exports.length = exports.lerp = exports.dot = exports.scale = exports.mul = exports.add = exports.set = exports.copy = exports.fromValues = exports.clone = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

var mat3 = _interopRequireWildcard(require("./mat3.js"));

var vec3 = _interopRequireWildcard(require("./vec3.js"));

var vec4 = _interopRequireWildcard(require("./vec4.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * Quaternion
 * @module quat
 */

/**
 * Creates a new identity quat
 *
 * @returns {quat} a new quaternion
 */
function create() {
  var out = new glMatrix.ARRAY_TYPE(4);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    out[0] = 0;
    out[1] = 0;
    out[2] = 0;
  }

  out[3] = 1;
  return out;
}
/**
 * Set a quat to the identity quaternion
 *
 * @param {quat} out the receiving quaternion
 * @returns {quat} out
 */


function identity(out) {
  out[0] = 0;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  return out;
}
/**
 * Sets a quat from the given angle and rotation axis,
 * then returns it.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyVec3} axis the axis around which to rotate
 * @param {Number} rad the angle in radians
 * @returns {quat} out
 **/


function setAxisAngle(out, axis, rad) {
  rad = rad * 0.5;
  var s = Math.sin(rad);
  out[0] = s * axis[0];
  out[1] = s * axis[1];
  out[2] = s * axis[2];
  out[3] = Math.cos(rad);
  return out;
}
/**
 * Gets the rotation axis and angle for a given
 *  quaternion. If a quaternion is created with
 *  setAxisAngle, this method will return the same
 *  values as providied in the original parameter list
 *  OR functionally equivalent values.
 * Example: The quaternion formed by axis [0, 0, 1] and
 *  angle -90 is the same as the quaternion formed by
 *  [0, 0, 1] and 270. This method favors the latter.
 * @param  {vec3} out_axis  Vector receiving the axis of rotation
 * @param  {ReadonlyQuat} q     Quaternion to be decomposed
 * @return {Number}     Angle, in radians, of the rotation
 */


function getAxisAngle(out_axis, q) {
  var rad = Math.acos(q[3]) * 2.0;
  var s = Math.sin(rad / 2.0);

  if (s > glMatrix.EPSILON) {
    out_axis[0] = q[0] / s;
    out_axis[1] = q[1] / s;
    out_axis[2] = q[2] / s;
  } else {
    // If s is zero, return any axis (no rotation - axis does not matter)
    out_axis[0] = 1;
    out_axis[1] = 0;
    out_axis[2] = 0;
  }

  return rad;
}
/**
 * Gets the angular distance between two unit quaternions
 *
 * @param  {ReadonlyQuat} a     Origin unit quaternion
 * @param  {ReadonlyQuat} b     Destination unit quaternion
 * @return {Number}     Angle, in radians, between the two quaternions
 */


function getAngle(a, b) {
  var dotproduct = dot(a, b);
  return Math.acos(2 * dotproduct * dotproduct - 1);
}
/**
 * Multiplies two quat's
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @returns {quat} out
 */


function multiply(out, a, b) {
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bx = b[0],
      by = b[1],
      bz = b[2],
      bw = b[3];
  out[0] = ax * bw + aw * bx + ay * bz - az * by;
  out[1] = ay * bw + aw * by + az * bx - ax * bz;
  out[2] = az * bw + aw * bz + ax * by - ay * bx;
  out[3] = aw * bw - ax * bx - ay * by - az * bz;
  return out;
}
/**
 * Rotates a quaternion by the given angle about the X axis
 *
 * @param {quat} out quat receiving operation result
 * @param {ReadonlyQuat} a quat to rotate
 * @param {number} rad angle (in radians) to rotate
 * @returns {quat} out
 */


function rotateX(out, a, rad) {
  rad *= 0.5;
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bx = Math.sin(rad),
      bw = Math.cos(rad);
  out[0] = ax * bw + aw * bx;
  out[1] = ay * bw + az * bx;
  out[2] = az * bw - ay * bx;
  out[3] = aw * bw - ax * bx;
  return out;
}
/**
 * Rotates a quaternion by the given angle about the Y axis
 *
 * @param {quat} out quat receiving operation result
 * @param {ReadonlyQuat} a quat to rotate
 * @param {number} rad angle (in radians) to rotate
 * @returns {quat} out
 */


function rotateY(out, a, rad) {
  rad *= 0.5;
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var by = Math.sin(rad),
      bw = Math.cos(rad);
  out[0] = ax * bw - az * by;
  out[1] = ay * bw + aw * by;
  out[2] = az * bw + ax * by;
  out[3] = aw * bw - ay * by;
  return out;
}
/**
 * Rotates a quaternion by the given angle about the Z axis
 *
 * @param {quat} out quat receiving operation result
 * @param {ReadonlyQuat} a quat to rotate
 * @param {number} rad angle (in radians) to rotate
 * @returns {quat} out
 */


function rotateZ(out, a, rad) {
  rad *= 0.5;
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bz = Math.sin(rad),
      bw = Math.cos(rad);
  out[0] = ax * bw + ay * bz;
  out[1] = ay * bw - ax * bz;
  out[2] = az * bw + aw * bz;
  out[3] = aw * bw - az * bz;
  return out;
}
/**
 * Calculates the W component of a quat from the X, Y, and Z components.
 * Assumes that quaternion is 1 unit in length.
 * Any existing W component will be ignored.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate W component of
 * @returns {quat} out
 */


function calculateW(out, a) {
  var x = a[0],
      y = a[1],
      z = a[2];
  out[0] = x;
  out[1] = y;
  out[2] = z;
  out[3] = Math.sqrt(Math.abs(1.0 - x * x - y * y - z * z));
  return out;
}
/**
 * Calculate the exponential of a unit quaternion.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate the exponential of
 * @returns {quat} out
 */


function exp(out, a) {
  var x = a[0],
      y = a[1],
      z = a[2],
      w = a[3];
  var r = Math.sqrt(x * x + y * y + z * z);
  var et = Math.exp(w);
  var s = r > 0 ? et * Math.sin(r) / r : 0;
  out[0] = x * s;
  out[1] = y * s;
  out[2] = z * s;
  out[3] = et * Math.cos(r);
  return out;
}
/**
 * Calculate the natural logarithm of a unit quaternion.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate the exponential of
 * @returns {quat} out
 */


function ln(out, a) {
  var x = a[0],
      y = a[1],
      z = a[2],
      w = a[3];
  var r = Math.sqrt(x * x + y * y + z * z);
  var t = r > 0 ? Math.atan2(r, w) / r : 0;
  out[0] = x * t;
  out[1] = y * t;
  out[2] = z * t;
  out[3] = 0.5 * Math.log(x * x + y * y + z * z + w * w);
  return out;
}
/**
 * Calculate the scalar power of a unit quaternion.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate the exponential of
 * @param {Number} b amount to scale the quaternion by
 * @returns {quat} out
 */


function pow(out, a, b) {
  ln(out, a);
  scale(out, out, b);
  exp(out, out);
  return out;
}
/**
 * Performs a spherical linear interpolation between two quat
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat} out
 */


function slerp(out, a, b, t) {
  // benchmarks:
  //    http://jsperf.com/quaternion-slerp-implementations
  var ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  var bx = b[0],
      by = b[1],
      bz = b[2],
      bw = b[3];
  var omega, cosom, sinom, scale0, scale1; // calc cosine

  cosom = ax * bx + ay * by + az * bz + aw * bw; // adjust signs (if necessary)

  if (cosom < 0.0) {
    cosom = -cosom;
    bx = -bx;
    by = -by;
    bz = -bz;
    bw = -bw;
  } // calculate coefficients


  if (1.0 - cosom > glMatrix.EPSILON) {
    // standard case (slerp)
    omega = Math.acos(cosom);
    sinom = Math.sin(omega);
    scale0 = Math.sin((1.0 - t) * omega) / sinom;
    scale1 = Math.sin(t * omega) / sinom;
  } else {
    // "from" and "to" quaternions are very close
    //  ... so we can do a linear interpolation
    scale0 = 1.0 - t;
    scale1 = t;
  } // calculate final values


  out[0] = scale0 * ax + scale1 * bx;
  out[1] = scale0 * ay + scale1 * by;
  out[2] = scale0 * az + scale1 * bz;
  out[3] = scale0 * aw + scale1 * bw;
  return out;
}
/**
 * Generates a random unit quaternion
 *
 * @param {quat} out the receiving quaternion
 * @returns {quat} out
 */


function random(out) {
  // Implementation of http://planning.cs.uiuc.edu/node198.html
  // TODO: Calling random 3 times is probably not the fastest solution
  var u1 = glMatrix.RANDOM();
  var u2 = glMatrix.RANDOM();
  var u3 = glMatrix.RANDOM();
  var sqrt1MinusU1 = Math.sqrt(1 - u1);
  var sqrtU1 = Math.sqrt(u1);
  out[0] = sqrt1MinusU1 * Math.sin(2.0 * Math.PI * u2);
  out[1] = sqrt1MinusU1 * Math.cos(2.0 * Math.PI * u2);
  out[2] = sqrtU1 * Math.sin(2.0 * Math.PI * u3);
  out[3] = sqrtU1 * Math.cos(2.0 * Math.PI * u3);
  return out;
}
/**
 * Calculates the inverse of a quat
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate inverse of
 * @returns {quat} out
 */


function invert(out, a) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3];
  var dot = a0 * a0 + a1 * a1 + a2 * a2 + a3 * a3;
  var invDot = dot ? 1.0 / dot : 0; // TODO: Would be faster to return [0,0,0,0] immediately if dot == 0

  out[0] = -a0 * invDot;
  out[1] = -a1 * invDot;
  out[2] = -a2 * invDot;
  out[3] = a3 * invDot;
  return out;
}
/**
 * Calculates the conjugate of a quat
 * If the quaternion is normalized, this function is faster than quat.inverse and produces the same result.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quat to calculate conjugate of
 * @returns {quat} out
 */


function conjugate(out, a) {
  out[0] = -a[0];
  out[1] = -a[1];
  out[2] = -a[2];
  out[3] = a[3];
  return out;
}
/**
 * Creates a quaternion from the given 3x3 rotation matrix.
 *
 * NOTE: The resultant quaternion is not normalized, so you should be sure
 * to renormalize the quaternion yourself where necessary.
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyMat3} m rotation matrix
 * @returns {quat} out
 * @function
 */


function fromMat3(out, m) {
  // Algorithm in Ken Shoemake's article in 1987 SIGGRAPH course notes
  // article "Quaternion Calculus and Fast Animation".
  var fTrace = m[0] + m[4] + m[8];
  var fRoot;

  if (fTrace > 0.0) {
    // |w| > 1/2, may as well choose w > 1/2
    fRoot = Math.sqrt(fTrace + 1.0); // 2w

    out[3] = 0.5 * fRoot;
    fRoot = 0.5 / fRoot; // 1/(4w)

    out[0] = (m[5] - m[7]) * fRoot;
    out[1] = (m[6] - m[2]) * fRoot;
    out[2] = (m[1] - m[3]) * fRoot;
  } else {
    // |w| <= 1/2
    var i = 0;
    if (m[4] > m[0]) i = 1;
    if (m[8] > m[i * 3 + i]) i = 2;
    var j = (i + 1) % 3;
    var k = (i + 2) % 3;
    fRoot = Math.sqrt(m[i * 3 + i] - m[j * 3 + j] - m[k * 3 + k] + 1.0);
    out[i] = 0.5 * fRoot;
    fRoot = 0.5 / fRoot;
    out[3] = (m[j * 3 + k] - m[k * 3 + j]) * fRoot;
    out[j] = (m[j * 3 + i] + m[i * 3 + j]) * fRoot;
    out[k] = (m[k * 3 + i] + m[i * 3 + k]) * fRoot;
  }

  return out;
}
/**
 * Creates a quaternion from the given euler angle x, y, z.
 *
 * @param {quat} out the receiving quaternion
 * @param {x} Angle to rotate around X axis in degrees.
 * @param {y} Angle to rotate around Y axis in degrees.
 * @param {z} Angle to rotate around Z axis in degrees.
 * @returns {quat} out
 * @function
 */


function fromEuler(out, x, y, z) {
  var halfToRad = 0.5 * Math.PI / 180.0;
  x *= halfToRad;
  y *= halfToRad;
  z *= halfToRad;
  var sx = Math.sin(x);
  var cx = Math.cos(x);
  var sy = Math.sin(y);
  var cy = Math.cos(y);
  var sz = Math.sin(z);
  var cz = Math.cos(z);
  out[0] = sx * cy * cz - cx * sy * sz;
  out[1] = cx * sy * cz + sx * cy * sz;
  out[2] = cx * cy * sz - sx * sy * cz;
  out[3] = cx * cy * cz + sx * sy * sz;
  return out;
}
/**
 * Returns a string representation of a quatenion
 *
 * @param {ReadonlyQuat} a vector to represent as a string
 * @returns {String} string representation of the vector
 */


function str(a) {
  return "quat(" + a[0] + ", " + a[1] + ", " + a[2] + ", " + a[3] + ")";
}
/**
 * Creates a new quat initialized with values from an existing quaternion
 *
 * @param {ReadonlyQuat} a quaternion to clone
 * @returns {quat} a new quaternion
 * @function
 */


var clone = vec4.clone;
/**
 * Creates a new quat initialized with the given values
 *
 * @param {Number} x X component
 * @param {Number} y Y component
 * @param {Number} z Z component
 * @param {Number} w W component
 * @returns {quat} a new quaternion
 * @function
 */

exports.clone = clone;
var fromValues = vec4.fromValues;
/**
 * Copy the values from one quat to another
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the source quaternion
 * @returns {quat} out
 * @function
 */

exports.fromValues = fromValues;
var copy = vec4.copy;
/**
 * Set the components of a quat to the given values
 *
 * @param {quat} out the receiving quaternion
 * @param {Number} x X component
 * @param {Number} y Y component
 * @param {Number} z Z component
 * @param {Number} w W component
 * @returns {quat} out
 * @function
 */

exports.copy = copy;
var set = vec4.set;
/**
 * Adds two quat's
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @returns {quat} out
 * @function
 */

exports.set = set;
var add = vec4.add;
/**
 * Alias for {@link quat.multiply}
 * @function
 */

exports.add = add;
var mul = multiply;
/**
 * Scales a quat by a scalar number
 *
 * @param {quat} out the receiving vector
 * @param {ReadonlyQuat} a the vector to scale
 * @param {Number} b amount to scale the vector by
 * @returns {quat} out
 * @function
 */

exports.mul = mul;
var scale = vec4.scale;
/**
 * Calculates the dot product of two quat's
 *
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @returns {Number} dot product of a and b
 * @function
 */

exports.scale = scale;
var dot = vec4.dot;
/**
 * Performs a linear interpolation between two quat's
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat} out
 * @function
 */

exports.dot = dot;
var lerp = vec4.lerp;
/**
 * Calculates the length of a quat
 *
 * @param {ReadonlyQuat} a vector to calculate length of
 * @returns {Number} length of a
 */

exports.lerp = lerp;
var length = vec4.length;
/**
 * Alias for {@link quat.length}
 * @function
 */

exports.length = length;
var len = length;
/**
 * Calculates the squared length of a quat
 *
 * @param {ReadonlyQuat} a vector to calculate squared length of
 * @returns {Number} squared length of a
 * @function
 */

exports.len = len;
var squaredLength = vec4.squaredLength;
/**
 * Alias for {@link quat.squaredLength}
 * @function
 */

exports.squaredLength = squaredLength;
var sqrLen = squaredLength;
/**
 * Normalize a quat
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a quaternion to normalize
 * @returns {quat} out
 * @function
 */

exports.sqrLen = sqrLen;
var normalize = vec4.normalize;
/**
 * Returns whether or not the quaternions have exactly the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyQuat} a The first quaternion.
 * @param {ReadonlyQuat} b The second quaternion.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */

exports.normalize = normalize;
var exactEquals = vec4.exactEquals;
/**
 * Returns whether or not the quaternions have approximately the same elements in the same position.
 *
 * @param {ReadonlyQuat} a The first vector.
 * @param {ReadonlyQuat} b The second vector.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */

exports.exactEquals = exactEquals;
var equals = vec4.equals;
/**
 * Sets a quaternion to represent the shortest rotation from one
 * vector to another.
 *
 * Both vectors are assumed to be unit length.
 *
 * @param {quat} out the receiving quaternion.
 * @param {ReadonlyVec3} a the initial vector
 * @param {ReadonlyVec3} b the destination vector
 * @returns {quat} out
 */

exports.equals = equals;

var rotationTo = function () {
  var tmpvec3 = vec3.create();
  var xUnitVec3 = vec3.fromValues(1, 0, 0);
  var yUnitVec3 = vec3.fromValues(0, 1, 0);
  return function (out, a, b) {
    var dot = vec3.dot(a, b);

    if (dot < -0.999999) {
      vec3.cross(tmpvec3, xUnitVec3, a);
      if (vec3.len(tmpvec3) < 0.000001) vec3.cross(tmpvec3, yUnitVec3, a);
      vec3.normalize(tmpvec3, tmpvec3);
      setAxisAngle(out, tmpvec3, Math.PI);
      return out;
    } else if (dot > 0.999999) {
      out[0] = 0;
      out[1] = 0;
      out[2] = 0;
      out[3] = 1;
      return out;
    } else {
      vec3.cross(tmpvec3, a, b);
      out[0] = tmpvec3[0];
      out[1] = tmpvec3[1];
      out[2] = tmpvec3[2];
      out[3] = 1 + dot;
      return normalize(out, out);
    }
  };
}();
/**
 * Performs a spherical linear interpolation with two control points
 *
 * @param {quat} out the receiving quaternion
 * @param {ReadonlyQuat} a the first operand
 * @param {ReadonlyQuat} b the second operand
 * @param {ReadonlyQuat} c the third operand
 * @param {ReadonlyQuat} d the fourth operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat} out
 */


exports.rotationTo = rotationTo;

var sqlerp = function () {
  var temp1 = create();
  var temp2 = create();
  return function (out, a, b, c, d, t) {
    slerp(temp1, a, d, t);
    slerp(temp2, b, c, t);
    slerp(out, temp1, temp2, 2 * t * (1 - t));
    return out;
  };
}();
/**
 * Sets the specified quaternion with values corresponding to the given
 * axes. Each axis is a vec3 and is expected to be unit length and
 * perpendicular to all other specified axes.
 *
 * @param {ReadonlyVec3} view  the vector representing the viewing direction
 * @param {ReadonlyVec3} right the vector representing the local "right" direction
 * @param {ReadonlyVec3} up    the vector representing the local "up" direction
 * @returns {quat} out
 */


exports.sqlerp = sqlerp;

var setAxes = function () {
  var matr = mat3.create();
  return function (out, view, right, up) {
    matr[0] = right[0];
    matr[3] = right[1];
    matr[6] = right[2];
    matr[1] = up[0];
    matr[4] = up[1];
    matr[7] = up[2];
    matr[2] = -view[0];
    matr[5] = -view[1];
    matr[8] = -view[2];
    return normalize(out, fromMat3(out, matr));
  };
}();

exports.setAxes = setAxes;
},{"./common.js":20,"./mat3.js":24,"./vec3.js":29,"./vec4.js":30}],27:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.clone = clone;
exports.fromValues = fromValues;
exports.fromRotationTranslationValues = fromRotationTranslationValues;
exports.fromRotationTranslation = fromRotationTranslation;
exports.fromTranslation = fromTranslation;
exports.fromRotation = fromRotation;
exports.fromMat4 = fromMat4;
exports.copy = copy;
exports.identity = identity;
exports.set = set;
exports.getDual = getDual;
exports.setDual = setDual;
exports.getTranslation = getTranslation;
exports.translate = translate;
exports.rotateX = rotateX;
exports.rotateY = rotateY;
exports.rotateZ = rotateZ;
exports.rotateByQuatAppend = rotateByQuatAppend;
exports.rotateByQuatPrepend = rotateByQuatPrepend;
exports.rotateAroundAxis = rotateAroundAxis;
exports.add = add;
exports.multiply = multiply;
exports.scale = scale;
exports.lerp = lerp;
exports.invert = invert;
exports.conjugate = conjugate;
exports.normalize = normalize;
exports.str = str;
exports.exactEquals = exactEquals;
exports.equals = equals;
exports.sqrLen = exports.squaredLength = exports.len = exports.length = exports.dot = exports.mul = exports.setReal = exports.getReal = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

var quat = _interopRequireWildcard(require("./quat.js"));

var mat4 = _interopRequireWildcard(require("./mat4.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * Dual Quaternion<br>
 * Format: [real, dual]<br>
 * Quaternion format: XYZW<br>
 * Make sure to have normalized dual quaternions, otherwise the functions may not work as intended.<br>
 * @module quat2
 */

/**
 * Creates a new identity dual quat
 *
 * @returns {quat2} a new dual quaternion [real -> rotation, dual -> translation]
 */
function create() {
  var dq = new glMatrix.ARRAY_TYPE(8);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    dq[0] = 0;
    dq[1] = 0;
    dq[2] = 0;
    dq[4] = 0;
    dq[5] = 0;
    dq[6] = 0;
    dq[7] = 0;
  }

  dq[3] = 1;
  return dq;
}
/**
 * Creates a new quat initialized with values from an existing quaternion
 *
 * @param {ReadonlyQuat2} a dual quaternion to clone
 * @returns {quat2} new dual quaternion
 * @function
 */


function clone(a) {
  var dq = new glMatrix.ARRAY_TYPE(8);
  dq[0] = a[0];
  dq[1] = a[1];
  dq[2] = a[2];
  dq[3] = a[3];
  dq[4] = a[4];
  dq[5] = a[5];
  dq[6] = a[6];
  dq[7] = a[7];
  return dq;
}
/**
 * Creates a new dual quat initialized with the given values
 *
 * @param {Number} x1 X component
 * @param {Number} y1 Y component
 * @param {Number} z1 Z component
 * @param {Number} w1 W component
 * @param {Number} x2 X component
 * @param {Number} y2 Y component
 * @param {Number} z2 Z component
 * @param {Number} w2 W component
 * @returns {quat2} new dual quaternion
 * @function
 */


function fromValues(x1, y1, z1, w1, x2, y2, z2, w2) {
  var dq = new glMatrix.ARRAY_TYPE(8);
  dq[0] = x1;
  dq[1] = y1;
  dq[2] = z1;
  dq[3] = w1;
  dq[4] = x2;
  dq[5] = y2;
  dq[6] = z2;
  dq[7] = w2;
  return dq;
}
/**
 * Creates a new dual quat from the given values (quat and translation)
 *
 * @param {Number} x1 X component
 * @param {Number} y1 Y component
 * @param {Number} z1 Z component
 * @param {Number} w1 W component
 * @param {Number} x2 X component (translation)
 * @param {Number} y2 Y component (translation)
 * @param {Number} z2 Z component (translation)
 * @returns {quat2} new dual quaternion
 * @function
 */


function fromRotationTranslationValues(x1, y1, z1, w1, x2, y2, z2) {
  var dq = new glMatrix.ARRAY_TYPE(8);
  dq[0] = x1;
  dq[1] = y1;
  dq[2] = z1;
  dq[3] = w1;
  var ax = x2 * 0.5,
      ay = y2 * 0.5,
      az = z2 * 0.5;
  dq[4] = ax * w1 + ay * z1 - az * y1;
  dq[5] = ay * w1 + az * x1 - ax * z1;
  dq[6] = az * w1 + ax * y1 - ay * x1;
  dq[7] = -ax * x1 - ay * y1 - az * z1;
  return dq;
}
/**
 * Creates a dual quat from a quaternion and a translation
 *
 * @param {ReadonlyQuat2} dual quaternion receiving operation result
 * @param {ReadonlyQuat} q a normalized quaternion
 * @param {ReadonlyVec3} t tranlation vector
 * @returns {quat2} dual quaternion receiving operation result
 * @function
 */


function fromRotationTranslation(out, q, t) {
  var ax = t[0] * 0.5,
      ay = t[1] * 0.5,
      az = t[2] * 0.5,
      bx = q[0],
      by = q[1],
      bz = q[2],
      bw = q[3];
  out[0] = bx;
  out[1] = by;
  out[2] = bz;
  out[3] = bw;
  out[4] = ax * bw + ay * bz - az * by;
  out[5] = ay * bw + az * bx - ax * bz;
  out[6] = az * bw + ax * by - ay * bx;
  out[7] = -ax * bx - ay * by - az * bz;
  return out;
}
/**
 * Creates a dual quat from a translation
 *
 * @param {ReadonlyQuat2} dual quaternion receiving operation result
 * @param {ReadonlyVec3} t translation vector
 * @returns {quat2} dual quaternion receiving operation result
 * @function
 */


function fromTranslation(out, t) {
  out[0] = 0;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  out[4] = t[0] * 0.5;
  out[5] = t[1] * 0.5;
  out[6] = t[2] * 0.5;
  out[7] = 0;
  return out;
}
/**
 * Creates a dual quat from a quaternion
 *
 * @param {ReadonlyQuat2} dual quaternion receiving operation result
 * @param {ReadonlyQuat} q the quaternion
 * @returns {quat2} dual quaternion receiving operation result
 * @function
 */


function fromRotation(out, q) {
  out[0] = q[0];
  out[1] = q[1];
  out[2] = q[2];
  out[3] = q[3];
  out[4] = 0;
  out[5] = 0;
  out[6] = 0;
  out[7] = 0;
  return out;
}
/**
 * Creates a new dual quat from a matrix (4x4)
 *
 * @param {quat2} out the dual quaternion
 * @param {ReadonlyMat4} a the matrix
 * @returns {quat2} dual quat receiving operation result
 * @function
 */


function fromMat4(out, a) {
  //TODO Optimize this
  var outer = quat.create();
  mat4.getRotation(outer, a);
  var t = new glMatrix.ARRAY_TYPE(3);
  mat4.getTranslation(t, a);
  fromRotationTranslation(out, outer, t);
  return out;
}
/**
 * Copy the values from one dual quat to another
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a the source dual quaternion
 * @returns {quat2} out
 * @function
 */


function copy(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  out[4] = a[4];
  out[5] = a[5];
  out[6] = a[6];
  out[7] = a[7];
  return out;
}
/**
 * Set a dual quat to the identity dual quaternion
 *
 * @param {quat2} out the receiving quaternion
 * @returns {quat2} out
 */


function identity(out) {
  out[0] = 0;
  out[1] = 0;
  out[2] = 0;
  out[3] = 1;
  out[4] = 0;
  out[5] = 0;
  out[6] = 0;
  out[7] = 0;
  return out;
}
/**
 * Set the components of a dual quat to the given values
 *
 * @param {quat2} out the receiving quaternion
 * @param {Number} x1 X component
 * @param {Number} y1 Y component
 * @param {Number} z1 Z component
 * @param {Number} w1 W component
 * @param {Number} x2 X component
 * @param {Number} y2 Y component
 * @param {Number} z2 Z component
 * @param {Number} w2 W component
 * @returns {quat2} out
 * @function
 */


function set(out, x1, y1, z1, w1, x2, y2, z2, w2) {
  out[0] = x1;
  out[1] = y1;
  out[2] = z1;
  out[3] = w1;
  out[4] = x2;
  out[5] = y2;
  out[6] = z2;
  out[7] = w2;
  return out;
}
/**
 * Gets the real part of a dual quat
 * @param  {quat} out real part
 * @param  {ReadonlyQuat2} a Dual Quaternion
 * @return {quat} real part
 */


var getReal = quat.copy;
/**
 * Gets the dual part of a dual quat
 * @param  {quat} out dual part
 * @param  {ReadonlyQuat2} a Dual Quaternion
 * @return {quat} dual part
 */

exports.getReal = getReal;

function getDual(out, a) {
  out[0] = a[4];
  out[1] = a[5];
  out[2] = a[6];
  out[3] = a[7];
  return out;
}
/**
 * Set the real component of a dual quat to the given quaternion
 *
 * @param {quat2} out the receiving quaternion
 * @param {ReadonlyQuat} q a quaternion representing the real part
 * @returns {quat2} out
 * @function
 */


var setReal = quat.copy;
/**
 * Set the dual component of a dual quat to the given quaternion
 *
 * @param {quat2} out the receiving quaternion
 * @param {ReadonlyQuat} q a quaternion representing the dual part
 * @returns {quat2} out
 * @function
 */

exports.setReal = setReal;

function setDual(out, q) {
  out[4] = q[0];
  out[5] = q[1];
  out[6] = q[2];
  out[7] = q[3];
  return out;
}
/**
 * Gets the translation of a normalized dual quat
 * @param  {vec3} out translation
 * @param  {ReadonlyQuat2} a Dual Quaternion to be decomposed
 * @return {vec3} translation
 */


function getTranslation(out, a) {
  var ax = a[4],
      ay = a[5],
      az = a[6],
      aw = a[7],
      bx = -a[0],
      by = -a[1],
      bz = -a[2],
      bw = a[3];
  out[0] = (ax * bw + aw * bx + ay * bz - az * by) * 2;
  out[1] = (ay * bw + aw * by + az * bx - ax * bz) * 2;
  out[2] = (az * bw + aw * bz + ax * by - ay * bx) * 2;
  return out;
}
/**
 * Translates a dual quat by the given vector
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a the dual quaternion to translate
 * @param {ReadonlyVec3} v vector to translate by
 * @returns {quat2} out
 */


function translate(out, a, v) {
  var ax1 = a[0],
      ay1 = a[1],
      az1 = a[2],
      aw1 = a[3],
      bx1 = v[0] * 0.5,
      by1 = v[1] * 0.5,
      bz1 = v[2] * 0.5,
      ax2 = a[4],
      ay2 = a[5],
      az2 = a[6],
      aw2 = a[7];
  out[0] = ax1;
  out[1] = ay1;
  out[2] = az1;
  out[3] = aw1;
  out[4] = aw1 * bx1 + ay1 * bz1 - az1 * by1 + ax2;
  out[5] = aw1 * by1 + az1 * bx1 - ax1 * bz1 + ay2;
  out[6] = aw1 * bz1 + ax1 * by1 - ay1 * bx1 + az2;
  out[7] = -ax1 * bx1 - ay1 * by1 - az1 * bz1 + aw2;
  return out;
}
/**
 * Rotates a dual quat around the X axis
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a the dual quaternion to rotate
 * @param {number} rad how far should the rotation be
 * @returns {quat2} out
 */


function rotateX(out, a, rad) {
  var bx = -a[0],
      by = -a[1],
      bz = -a[2],
      bw = a[3],
      ax = a[4],
      ay = a[5],
      az = a[6],
      aw = a[7],
      ax1 = ax * bw + aw * bx + ay * bz - az * by,
      ay1 = ay * bw + aw * by + az * bx - ax * bz,
      az1 = az * bw + aw * bz + ax * by - ay * bx,
      aw1 = aw * bw - ax * bx - ay * by - az * bz;
  quat.rotateX(out, a, rad);
  bx = out[0];
  by = out[1];
  bz = out[2];
  bw = out[3];
  out[4] = ax1 * bw + aw1 * bx + ay1 * bz - az1 * by;
  out[5] = ay1 * bw + aw1 * by + az1 * bx - ax1 * bz;
  out[6] = az1 * bw + aw1 * bz + ax1 * by - ay1 * bx;
  out[7] = aw1 * bw - ax1 * bx - ay1 * by - az1 * bz;
  return out;
}
/**
 * Rotates a dual quat around the Y axis
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a the dual quaternion to rotate
 * @param {number} rad how far should the rotation be
 * @returns {quat2} out
 */


function rotateY(out, a, rad) {
  var bx = -a[0],
      by = -a[1],
      bz = -a[2],
      bw = a[3],
      ax = a[4],
      ay = a[5],
      az = a[6],
      aw = a[7],
      ax1 = ax * bw + aw * bx + ay * bz - az * by,
      ay1 = ay * bw + aw * by + az * bx - ax * bz,
      az1 = az * bw + aw * bz + ax * by - ay * bx,
      aw1 = aw * bw - ax * bx - ay * by - az * bz;
  quat.rotateY(out, a, rad);
  bx = out[0];
  by = out[1];
  bz = out[2];
  bw = out[3];
  out[4] = ax1 * bw + aw1 * bx + ay1 * bz - az1 * by;
  out[5] = ay1 * bw + aw1 * by + az1 * bx - ax1 * bz;
  out[6] = az1 * bw + aw1 * bz + ax1 * by - ay1 * bx;
  out[7] = aw1 * bw - ax1 * bx - ay1 * by - az1 * bz;
  return out;
}
/**
 * Rotates a dual quat around the Z axis
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a the dual quaternion to rotate
 * @param {number} rad how far should the rotation be
 * @returns {quat2} out
 */


function rotateZ(out, a, rad) {
  var bx = -a[0],
      by = -a[1],
      bz = -a[2],
      bw = a[3],
      ax = a[4],
      ay = a[5],
      az = a[6],
      aw = a[7],
      ax1 = ax * bw + aw * bx + ay * bz - az * by,
      ay1 = ay * bw + aw * by + az * bx - ax * bz,
      az1 = az * bw + aw * bz + ax * by - ay * bx,
      aw1 = aw * bw - ax * bx - ay * by - az * bz;
  quat.rotateZ(out, a, rad);
  bx = out[0];
  by = out[1];
  bz = out[2];
  bw = out[3];
  out[4] = ax1 * bw + aw1 * bx + ay1 * bz - az1 * by;
  out[5] = ay1 * bw + aw1 * by + az1 * bx - ax1 * bz;
  out[6] = az1 * bw + aw1 * bz + ax1 * by - ay1 * bx;
  out[7] = aw1 * bw - ax1 * bx - ay1 * by - az1 * bz;
  return out;
}
/**
 * Rotates a dual quat by a given quaternion (a * q)
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a the dual quaternion to rotate
 * @param {ReadonlyQuat} q quaternion to rotate by
 * @returns {quat2} out
 */


function rotateByQuatAppend(out, a, q) {
  var qx = q[0],
      qy = q[1],
      qz = q[2],
      qw = q[3],
      ax = a[0],
      ay = a[1],
      az = a[2],
      aw = a[3];
  out[0] = ax * qw + aw * qx + ay * qz - az * qy;
  out[1] = ay * qw + aw * qy + az * qx - ax * qz;
  out[2] = az * qw + aw * qz + ax * qy - ay * qx;
  out[3] = aw * qw - ax * qx - ay * qy - az * qz;
  ax = a[4];
  ay = a[5];
  az = a[6];
  aw = a[7];
  out[4] = ax * qw + aw * qx + ay * qz - az * qy;
  out[5] = ay * qw + aw * qy + az * qx - ax * qz;
  out[6] = az * qw + aw * qz + ax * qy - ay * qx;
  out[7] = aw * qw - ax * qx - ay * qy - az * qz;
  return out;
}
/**
 * Rotates a dual quat by a given quaternion (q * a)
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat} q quaternion to rotate by
 * @param {ReadonlyQuat2} a the dual quaternion to rotate
 * @returns {quat2} out
 */


function rotateByQuatPrepend(out, q, a) {
  var qx = q[0],
      qy = q[1],
      qz = q[2],
      qw = q[3],
      bx = a[0],
      by = a[1],
      bz = a[2],
      bw = a[3];
  out[0] = qx * bw + qw * bx + qy * bz - qz * by;
  out[1] = qy * bw + qw * by + qz * bx - qx * bz;
  out[2] = qz * bw + qw * bz + qx * by - qy * bx;
  out[3] = qw * bw - qx * bx - qy * by - qz * bz;
  bx = a[4];
  by = a[5];
  bz = a[6];
  bw = a[7];
  out[4] = qx * bw + qw * bx + qy * bz - qz * by;
  out[5] = qy * bw + qw * by + qz * bx - qx * bz;
  out[6] = qz * bw + qw * bz + qx * by - qy * bx;
  out[7] = qw * bw - qx * bx - qy * by - qz * bz;
  return out;
}
/**
 * Rotates a dual quat around a given axis. Does the normalisation automatically
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a the dual quaternion to rotate
 * @param {ReadonlyVec3} axis the axis to rotate around
 * @param {Number} rad how far the rotation should be
 * @returns {quat2} out
 */


function rotateAroundAxis(out, a, axis, rad) {
  //Special case for rad = 0
  if (Math.abs(rad) < glMatrix.EPSILON) {
    return copy(out, a);
  }

  var axisLength = Math.hypot(axis[0], axis[1], axis[2]);
  rad = rad * 0.5;
  var s = Math.sin(rad);
  var bx = s * axis[0] / axisLength;
  var by = s * axis[1] / axisLength;
  var bz = s * axis[2] / axisLength;
  var bw = Math.cos(rad);
  var ax1 = a[0],
      ay1 = a[1],
      az1 = a[2],
      aw1 = a[3];
  out[0] = ax1 * bw + aw1 * bx + ay1 * bz - az1 * by;
  out[1] = ay1 * bw + aw1 * by + az1 * bx - ax1 * bz;
  out[2] = az1 * bw + aw1 * bz + ax1 * by - ay1 * bx;
  out[3] = aw1 * bw - ax1 * bx - ay1 * by - az1 * bz;
  var ax = a[4],
      ay = a[5],
      az = a[6],
      aw = a[7];
  out[4] = ax * bw + aw * bx + ay * bz - az * by;
  out[5] = ay * bw + aw * by + az * bx - ax * bz;
  out[6] = az * bw + aw * bz + ax * by - ay * bx;
  out[7] = aw * bw - ax * bx - ay * by - az * bz;
  return out;
}
/**
 * Adds two dual quat's
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a the first operand
 * @param {ReadonlyQuat2} b the second operand
 * @returns {quat2} out
 * @function
 */


function add(out, a, b) {
  out[0] = a[0] + b[0];
  out[1] = a[1] + b[1];
  out[2] = a[2] + b[2];
  out[3] = a[3] + b[3];
  out[4] = a[4] + b[4];
  out[5] = a[5] + b[5];
  out[6] = a[6] + b[6];
  out[7] = a[7] + b[7];
  return out;
}
/**
 * Multiplies two dual quat's
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a the first operand
 * @param {ReadonlyQuat2} b the second operand
 * @returns {quat2} out
 */


function multiply(out, a, b) {
  var ax0 = a[0],
      ay0 = a[1],
      az0 = a[2],
      aw0 = a[3],
      bx1 = b[4],
      by1 = b[5],
      bz1 = b[6],
      bw1 = b[7],
      ax1 = a[4],
      ay1 = a[5],
      az1 = a[6],
      aw1 = a[7],
      bx0 = b[0],
      by0 = b[1],
      bz0 = b[2],
      bw0 = b[3];
  out[0] = ax0 * bw0 + aw0 * bx0 + ay0 * bz0 - az0 * by0;
  out[1] = ay0 * bw0 + aw0 * by0 + az0 * bx0 - ax0 * bz0;
  out[2] = az0 * bw0 + aw0 * bz0 + ax0 * by0 - ay0 * bx0;
  out[3] = aw0 * bw0 - ax0 * bx0 - ay0 * by0 - az0 * bz0;
  out[4] = ax0 * bw1 + aw0 * bx1 + ay0 * bz1 - az0 * by1 + ax1 * bw0 + aw1 * bx0 + ay1 * bz0 - az1 * by0;
  out[5] = ay0 * bw1 + aw0 * by1 + az0 * bx1 - ax0 * bz1 + ay1 * bw0 + aw1 * by0 + az1 * bx0 - ax1 * bz0;
  out[6] = az0 * bw1 + aw0 * bz1 + ax0 * by1 - ay0 * bx1 + az1 * bw0 + aw1 * bz0 + ax1 * by0 - ay1 * bx0;
  out[7] = aw0 * bw1 - ax0 * bx1 - ay0 * by1 - az0 * bz1 + aw1 * bw0 - ax1 * bx0 - ay1 * by0 - az1 * bz0;
  return out;
}
/**
 * Alias for {@link quat2.multiply}
 * @function
 */


var mul = multiply;
/**
 * Scales a dual quat by a scalar number
 *
 * @param {quat2} out the receiving dual quat
 * @param {ReadonlyQuat2} a the dual quat to scale
 * @param {Number} b amount to scale the dual quat by
 * @returns {quat2} out
 * @function
 */

exports.mul = mul;

function scale(out, a, b) {
  out[0] = a[0] * b;
  out[1] = a[1] * b;
  out[2] = a[2] * b;
  out[3] = a[3] * b;
  out[4] = a[4] * b;
  out[5] = a[5] * b;
  out[6] = a[6] * b;
  out[7] = a[7] * b;
  return out;
}
/**
 * Calculates the dot product of two dual quat's (The dot product of the real parts)
 *
 * @param {ReadonlyQuat2} a the first operand
 * @param {ReadonlyQuat2} b the second operand
 * @returns {Number} dot product of a and b
 * @function
 */


var dot = quat.dot;
/**
 * Performs a linear interpolation between two dual quats's
 * NOTE: The resulting dual quaternions won't always be normalized (The error is most noticeable when t = 0.5)
 *
 * @param {quat2} out the receiving dual quat
 * @param {ReadonlyQuat2} a the first operand
 * @param {ReadonlyQuat2} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {quat2} out
 */

exports.dot = dot;

function lerp(out, a, b, t) {
  var mt = 1 - t;
  if (dot(a, b) < 0) t = -t;
  out[0] = a[0] * mt + b[0] * t;
  out[1] = a[1] * mt + b[1] * t;
  out[2] = a[2] * mt + b[2] * t;
  out[3] = a[3] * mt + b[3] * t;
  out[4] = a[4] * mt + b[4] * t;
  out[5] = a[5] * mt + b[5] * t;
  out[6] = a[6] * mt + b[6] * t;
  out[7] = a[7] * mt + b[7] * t;
  return out;
}
/**
 * Calculates the inverse of a dual quat. If they are normalized, conjugate is cheaper
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a dual quat to calculate inverse of
 * @returns {quat2} out
 */


function invert(out, a) {
  var sqlen = squaredLength(a);
  out[0] = -a[0] / sqlen;
  out[1] = -a[1] / sqlen;
  out[2] = -a[2] / sqlen;
  out[3] = a[3] / sqlen;
  out[4] = -a[4] / sqlen;
  out[5] = -a[5] / sqlen;
  out[6] = -a[6] / sqlen;
  out[7] = a[7] / sqlen;
  return out;
}
/**
 * Calculates the conjugate of a dual quat
 * If the dual quaternion is normalized, this function is faster than quat2.inverse and produces the same result.
 *
 * @param {quat2} out the receiving quaternion
 * @param {ReadonlyQuat2} a quat to calculate conjugate of
 * @returns {quat2} out
 */


function conjugate(out, a) {
  out[0] = -a[0];
  out[1] = -a[1];
  out[2] = -a[2];
  out[3] = a[3];
  out[4] = -a[4];
  out[5] = -a[5];
  out[6] = -a[6];
  out[7] = a[7];
  return out;
}
/**
 * Calculates the length of a dual quat
 *
 * @param {ReadonlyQuat2} a dual quat to calculate length of
 * @returns {Number} length of a
 * @function
 */


var length = quat.length;
/**
 * Alias for {@link quat2.length}
 * @function
 */

exports.length = length;
var len = length;
/**
 * Calculates the squared length of a dual quat
 *
 * @param {ReadonlyQuat2} a dual quat to calculate squared length of
 * @returns {Number} squared length of a
 * @function
 */

exports.len = len;
var squaredLength = quat.squaredLength;
/**
 * Alias for {@link quat2.squaredLength}
 * @function
 */

exports.squaredLength = squaredLength;
var sqrLen = squaredLength;
/**
 * Normalize a dual quat
 *
 * @param {quat2} out the receiving dual quaternion
 * @param {ReadonlyQuat2} a dual quaternion to normalize
 * @returns {quat2} out
 * @function
 */

exports.sqrLen = sqrLen;

function normalize(out, a) {
  var magnitude = squaredLength(a);

  if (magnitude > 0) {
    magnitude = Math.sqrt(magnitude);
    var a0 = a[0] / magnitude;
    var a1 = a[1] / magnitude;
    var a2 = a[2] / magnitude;
    var a3 = a[3] / magnitude;
    var b0 = a[4];
    var b1 = a[5];
    var b2 = a[6];
    var b3 = a[7];
    var a_dot_b = a0 * b0 + a1 * b1 + a2 * b2 + a3 * b3;
    out[0] = a0;
    out[1] = a1;
    out[2] = a2;
    out[3] = a3;
    out[4] = (b0 - a0 * a_dot_b) / magnitude;
    out[5] = (b1 - a1 * a_dot_b) / magnitude;
    out[6] = (b2 - a2 * a_dot_b) / magnitude;
    out[7] = (b3 - a3 * a_dot_b) / magnitude;
  }

  return out;
}
/**
 * Returns a string representation of a dual quatenion
 *
 * @param {ReadonlyQuat2} a dual quaternion to represent as a string
 * @returns {String} string representation of the dual quat
 */


function str(a) {
  return "quat2(" + a[0] + ", " + a[1] + ", " + a[2] + ", " + a[3] + ", " + a[4] + ", " + a[5] + ", " + a[6] + ", " + a[7] + ")";
}
/**
 * Returns whether or not the dual quaternions have exactly the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyQuat2} a the first dual quaternion.
 * @param {ReadonlyQuat2} b the second dual quaternion.
 * @returns {Boolean} true if the dual quaternions are equal, false otherwise.
 */


function exactEquals(a, b) {
  return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3] && a[4] === b[4] && a[5] === b[5] && a[6] === b[6] && a[7] === b[7];
}
/**
 * Returns whether or not the dual quaternions have approximately the same elements in the same position.
 *
 * @param {ReadonlyQuat2} a the first dual quat.
 * @param {ReadonlyQuat2} b the second dual quat.
 * @returns {Boolean} true if the dual quats are equal, false otherwise.
 */


function equals(a, b) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3],
      a4 = a[4],
      a5 = a[5],
      a6 = a[6],
      a7 = a[7];
  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3],
      b4 = b[4],
      b5 = b[5],
      b6 = b[6],
      b7 = b[7];
  return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3)) && Math.abs(a4 - b4) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a4), Math.abs(b4)) && Math.abs(a5 - b5) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a5), Math.abs(b5)) && Math.abs(a6 - b6) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a6), Math.abs(b6)) && Math.abs(a7 - b7) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a7), Math.abs(b7));
}
},{"./common.js":20,"./mat4.js":25,"./quat.js":26}],28:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.clone = clone;
exports.fromValues = fromValues;
exports.copy = copy;
exports.set = set;
exports.add = add;
exports.subtract = subtract;
exports.multiply = multiply;
exports.divide = divide;
exports.ceil = ceil;
exports.floor = floor;
exports.min = min;
exports.max = max;
exports.round = round;
exports.scale = scale;
exports.scaleAndAdd = scaleAndAdd;
exports.distance = distance;
exports.squaredDistance = squaredDistance;
exports.length = length;
exports.squaredLength = squaredLength;
exports.negate = negate;
exports.inverse = inverse;
exports.normalize = normalize;
exports.dot = dot;
exports.cross = cross;
exports.lerp = lerp;
exports.random = random;
exports.transformMat2 = transformMat2;
exports.transformMat2d = transformMat2d;
exports.transformMat3 = transformMat3;
exports.transformMat4 = transformMat4;
exports.rotate = rotate;
exports.angle = angle;
exports.zero = zero;
exports.str = str;
exports.exactEquals = exactEquals;
exports.equals = equals;
exports.forEach = exports.sqrLen = exports.sqrDist = exports.dist = exports.div = exports.mul = exports.sub = exports.len = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * 2 Dimensional Vector
 * @module vec2
 */

/**
 * Creates a new, empty vec2
 *
 * @returns {vec2} a new 2D vector
 */
function create() {
  var out = new glMatrix.ARRAY_TYPE(2);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    out[0] = 0;
    out[1] = 0;
  }

  return out;
}
/**
 * Creates a new vec2 initialized with values from an existing vector
 *
 * @param {ReadonlyVec2} a vector to clone
 * @returns {vec2} a new 2D vector
 */


function clone(a) {
  var out = new glMatrix.ARRAY_TYPE(2);
  out[0] = a[0];
  out[1] = a[1];
  return out;
}
/**
 * Creates a new vec2 initialized with the given values
 *
 * @param {Number} x X component
 * @param {Number} y Y component
 * @returns {vec2} a new 2D vector
 */


function fromValues(x, y) {
  var out = new glMatrix.ARRAY_TYPE(2);
  out[0] = x;
  out[1] = y;
  return out;
}
/**
 * Copy the values from one vec2 to another
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the source vector
 * @returns {vec2} out
 */


function copy(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  return out;
}
/**
 * Set the components of a vec2 to the given values
 *
 * @param {vec2} out the receiving vector
 * @param {Number} x X component
 * @param {Number} y Y component
 * @returns {vec2} out
 */


function set(out, x, y) {
  out[0] = x;
  out[1] = y;
  return out;
}
/**
 * Adds two vec2's
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {vec2} out
 */


function add(out, a, b) {
  out[0] = a[0] + b[0];
  out[1] = a[1] + b[1];
  return out;
}
/**
 * Subtracts vector b from vector a
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {vec2} out
 */


function subtract(out, a, b) {
  out[0] = a[0] - b[0];
  out[1] = a[1] - b[1];
  return out;
}
/**
 * Multiplies two vec2's
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {vec2} out
 */


function multiply(out, a, b) {
  out[0] = a[0] * b[0];
  out[1] = a[1] * b[1];
  return out;
}
/**
 * Divides two vec2's
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {vec2} out
 */


function divide(out, a, b) {
  out[0] = a[0] / b[0];
  out[1] = a[1] / b[1];
  return out;
}
/**
 * Math.ceil the components of a vec2
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a vector to ceil
 * @returns {vec2} out
 */


function ceil(out, a) {
  out[0] = Math.ceil(a[0]);
  out[1] = Math.ceil(a[1]);
  return out;
}
/**
 * Math.floor the components of a vec2
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a vector to floor
 * @returns {vec2} out
 */


function floor(out, a) {
  out[0] = Math.floor(a[0]);
  out[1] = Math.floor(a[1]);
  return out;
}
/**
 * Returns the minimum of two vec2's
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {vec2} out
 */


function min(out, a, b) {
  out[0] = Math.min(a[0], b[0]);
  out[1] = Math.min(a[1], b[1]);
  return out;
}
/**
 * Returns the maximum of two vec2's
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {vec2} out
 */


function max(out, a, b) {
  out[0] = Math.max(a[0], b[0]);
  out[1] = Math.max(a[1], b[1]);
  return out;
}
/**
 * Math.round the components of a vec2
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a vector to round
 * @returns {vec2} out
 */


function round(out, a) {
  out[0] = Math.round(a[0]);
  out[1] = Math.round(a[1]);
  return out;
}
/**
 * Scales a vec2 by a scalar number
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the vector to scale
 * @param {Number} b amount to scale the vector by
 * @returns {vec2} out
 */


function scale(out, a, b) {
  out[0] = a[0] * b;
  out[1] = a[1] * b;
  return out;
}
/**
 * Adds two vec2's after scaling the second operand by a scalar value
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @param {Number} scale the amount to scale b by before adding
 * @returns {vec2} out
 */


function scaleAndAdd(out, a, b, scale) {
  out[0] = a[0] + b[0] * scale;
  out[1] = a[1] + b[1] * scale;
  return out;
}
/**
 * Calculates the euclidian distance between two vec2's
 *
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {Number} distance between a and b
 */


function distance(a, b) {
  var x = b[0] - a[0],
      y = b[1] - a[1];
  return Math.hypot(x, y);
}
/**
 * Calculates the squared euclidian distance between two vec2's
 *
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {Number} squared distance between a and b
 */


function squaredDistance(a, b) {
  var x = b[0] - a[0],
      y = b[1] - a[1];
  return x * x + y * y;
}
/**
 * Calculates the length of a vec2
 *
 * @param {ReadonlyVec2} a vector to calculate length of
 * @returns {Number} length of a
 */


function length(a) {
  var x = a[0],
      y = a[1];
  return Math.hypot(x, y);
}
/**
 * Calculates the squared length of a vec2
 *
 * @param {ReadonlyVec2} a vector to calculate squared length of
 * @returns {Number} squared length of a
 */


function squaredLength(a) {
  var x = a[0],
      y = a[1];
  return x * x + y * y;
}
/**
 * Negates the components of a vec2
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a vector to negate
 * @returns {vec2} out
 */


function negate(out, a) {
  out[0] = -a[0];
  out[1] = -a[1];
  return out;
}
/**
 * Returns the inverse of the components of a vec2
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a vector to invert
 * @returns {vec2} out
 */


function inverse(out, a) {
  out[0] = 1.0 / a[0];
  out[1] = 1.0 / a[1];
  return out;
}
/**
 * Normalize a vec2
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a vector to normalize
 * @returns {vec2} out
 */


function normalize(out, a) {
  var x = a[0],
      y = a[1];
  var len = x * x + y * y;

  if (len > 0) {
    //TODO: evaluate use of glm_invsqrt here?
    len = 1 / Math.sqrt(len);
  }

  out[0] = a[0] * len;
  out[1] = a[1] * len;
  return out;
}
/**
 * Calculates the dot product of two vec2's
 *
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {Number} dot product of a and b
 */


function dot(a, b) {
  return a[0] * b[0] + a[1] * b[1];
}
/**
 * Computes the cross product of two vec2's
 * Note that the cross product must by definition produce a 3D vector
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @returns {vec3} out
 */


function cross(out, a, b) {
  var z = a[0] * b[1] - a[1] * b[0];
  out[0] = out[1] = 0;
  out[2] = z;
  return out;
}
/**
 * Performs a linear interpolation between two vec2's
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the first operand
 * @param {ReadonlyVec2} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {vec2} out
 */


function lerp(out, a, b, t) {
  var ax = a[0],
      ay = a[1];
  out[0] = ax + t * (b[0] - ax);
  out[1] = ay + t * (b[1] - ay);
  return out;
}
/**
 * Generates a random vector with the given scale
 *
 * @param {vec2} out the receiving vector
 * @param {Number} [scale] Length of the resulting vector. If ommitted, a unit vector will be returned
 * @returns {vec2} out
 */


function random(out, scale) {
  scale = scale || 1.0;
  var r = glMatrix.RANDOM() * 2.0 * Math.PI;
  out[0] = Math.cos(r) * scale;
  out[1] = Math.sin(r) * scale;
  return out;
}
/**
 * Transforms the vec2 with a mat2
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the vector to transform
 * @param {ReadonlyMat2} m matrix to transform with
 * @returns {vec2} out
 */


function transformMat2(out, a, m) {
  var x = a[0],
      y = a[1];
  out[0] = m[0] * x + m[2] * y;
  out[1] = m[1] * x + m[3] * y;
  return out;
}
/**
 * Transforms the vec2 with a mat2d
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the vector to transform
 * @param {ReadonlyMat2d} m matrix to transform with
 * @returns {vec2} out
 */


function transformMat2d(out, a, m) {
  var x = a[0],
      y = a[1];
  out[0] = m[0] * x + m[2] * y + m[4];
  out[1] = m[1] * x + m[3] * y + m[5];
  return out;
}
/**
 * Transforms the vec2 with a mat3
 * 3rd vector component is implicitly '1'
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the vector to transform
 * @param {ReadonlyMat3} m matrix to transform with
 * @returns {vec2} out
 */


function transformMat3(out, a, m) {
  var x = a[0],
      y = a[1];
  out[0] = m[0] * x + m[3] * y + m[6];
  out[1] = m[1] * x + m[4] * y + m[7];
  return out;
}
/**
 * Transforms the vec2 with a mat4
 * 3rd vector component is implicitly '0'
 * 4th vector component is implicitly '1'
 *
 * @param {vec2} out the receiving vector
 * @param {ReadonlyVec2} a the vector to transform
 * @param {ReadonlyMat4} m matrix to transform with
 * @returns {vec2} out
 */


function transformMat4(out, a, m) {
  var x = a[0];
  var y = a[1];
  out[0] = m[0] * x + m[4] * y + m[12];
  out[1] = m[1] * x + m[5] * y + m[13];
  return out;
}
/**
 * Rotate a 2D vector
 * @param {vec2} out The receiving vec2
 * @param {ReadonlyVec2} a The vec2 point to rotate
 * @param {ReadonlyVec2} b The origin of the rotation
 * @param {Number} rad The angle of rotation in radians
 * @returns {vec2} out
 */


function rotate(out, a, b, rad) {
  //Translate point to the origin
  var p0 = a[0] - b[0],
      p1 = a[1] - b[1],
      sinC = Math.sin(rad),
      cosC = Math.cos(rad); //perform rotation and translate to correct position

  out[0] = p0 * cosC - p1 * sinC + b[0];
  out[1] = p0 * sinC + p1 * cosC + b[1];
  return out;
}
/**
 * Get the angle between two 2D vectors
 * @param {ReadonlyVec2} a The first operand
 * @param {ReadonlyVec2} b The second operand
 * @returns {Number} The angle in radians
 */


function angle(a, b) {
  var x1 = a[0],
      y1 = a[1],
      x2 = b[0],
      y2 = b[1],
      // mag is the product of the magnitudes of a and b
  mag = Math.sqrt(x1 * x1 + y1 * y1) * Math.sqrt(x2 * x2 + y2 * y2),
      // mag &&.. short circuits if mag == 0
  cosine = mag && (x1 * x2 + y1 * y2) / mag; // Math.min(Math.max(cosine, -1), 1) clamps the cosine between -1 and 1

  return Math.acos(Math.min(Math.max(cosine, -1), 1));
}
/**
 * Set the components of a vec2 to zero
 *
 * @param {vec2} out the receiving vector
 * @returns {vec2} out
 */


function zero(out) {
  out[0] = 0.0;
  out[1] = 0.0;
  return out;
}
/**
 * Returns a string representation of a vector
 *
 * @param {ReadonlyVec2} a vector to represent as a string
 * @returns {String} string representation of the vector
 */


function str(a) {
  return "vec2(" + a[0] + ", " + a[1] + ")";
}
/**
 * Returns whether or not the vectors exactly have the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyVec2} a The first vector.
 * @param {ReadonlyVec2} b The second vector.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */


function exactEquals(a, b) {
  return a[0] === b[0] && a[1] === b[1];
}
/**
 * Returns whether or not the vectors have approximately the same elements in the same position.
 *
 * @param {ReadonlyVec2} a The first vector.
 * @param {ReadonlyVec2} b The second vector.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */


function equals(a, b) {
  var a0 = a[0],
      a1 = a[1];
  var b0 = b[0],
      b1 = b[1];
  return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1));
}
/**
 * Alias for {@link vec2.length}
 * @function
 */


var len = length;
/**
 * Alias for {@link vec2.subtract}
 * @function
 */

exports.len = len;
var sub = subtract;
/**
 * Alias for {@link vec2.multiply}
 * @function
 */

exports.sub = sub;
var mul = multiply;
/**
 * Alias for {@link vec2.divide}
 * @function
 */

exports.mul = mul;
var div = divide;
/**
 * Alias for {@link vec2.distance}
 * @function
 */

exports.div = div;
var dist = distance;
/**
 * Alias for {@link vec2.squaredDistance}
 * @function
 */

exports.dist = dist;
var sqrDist = squaredDistance;
/**
 * Alias for {@link vec2.squaredLength}
 * @function
 */

exports.sqrDist = sqrDist;
var sqrLen = squaredLength;
/**
 * Perform some operation over an array of vec2s.
 *
 * @param {Array} a the array of vectors to iterate over
 * @param {Number} stride Number of elements between the start of each vec2. If 0 assumes tightly packed
 * @param {Number} offset Number of elements to skip at the beginning of the array
 * @param {Number} count Number of vec2s to iterate over. If 0 iterates over entire array
 * @param {Function} fn Function to call for each vector in the array
 * @param {Object} [arg] additional argument to pass to fn
 * @returns {Array} a
 * @function
 */

exports.sqrLen = sqrLen;

var forEach = function () {
  var vec = create();
  return function (a, stride, offset, count, fn, arg) {
    var i, l;

    if (!stride) {
      stride = 2;
    }

    if (!offset) {
      offset = 0;
    }

    if (count) {
      l = Math.min(count * stride + offset, a.length);
    } else {
      l = a.length;
    }

    for (i = offset; i < l; i += stride) {
      vec[0] = a[i];
      vec[1] = a[i + 1];
      fn(vec, vec, arg);
      a[i] = vec[0];
      a[i + 1] = vec[1];
    }

    return a;
  };
}();

exports.forEach = forEach;
},{"./common.js":20}],29:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.clone = clone;
exports.length = length;
exports.fromValues = fromValues;
exports.copy = copy;
exports.set = set;
exports.add = add;
exports.subtract = subtract;
exports.multiply = multiply;
exports.divide = divide;
exports.ceil = ceil;
exports.floor = floor;
exports.min = min;
exports.max = max;
exports.round = round;
exports.scale = scale;
exports.scaleAndAdd = scaleAndAdd;
exports.distance = distance;
exports.squaredDistance = squaredDistance;
exports.squaredLength = squaredLength;
exports.negate = negate;
exports.inverse = inverse;
exports.normalize = normalize;
exports.dot = dot;
exports.cross = cross;
exports.lerp = lerp;
exports.hermite = hermite;
exports.bezier = bezier;
exports.random = random;
exports.transformMat4 = transformMat4;
exports.transformMat3 = transformMat3;
exports.transformQuat = transformQuat;
exports.rotateX = rotateX;
exports.rotateY = rotateY;
exports.rotateZ = rotateZ;
exports.angle = angle;
exports.zero = zero;
exports.str = str;
exports.exactEquals = exactEquals;
exports.equals = equals;
exports.forEach = exports.sqrLen = exports.len = exports.sqrDist = exports.dist = exports.div = exports.mul = exports.sub = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * 3 Dimensional Vector
 * @module vec3
 */

/**
 * Creates a new, empty vec3
 *
 * @returns {vec3} a new 3D vector
 */
function create() {
  var out = new glMatrix.ARRAY_TYPE(3);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    out[0] = 0;
    out[1] = 0;
    out[2] = 0;
  }

  return out;
}
/**
 * Creates a new vec3 initialized with values from an existing vector
 *
 * @param {ReadonlyVec3} a vector to clone
 * @returns {vec3} a new 3D vector
 */


function clone(a) {
  var out = new glMatrix.ARRAY_TYPE(3);
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  return out;
}
/**
 * Calculates the length of a vec3
 *
 * @param {ReadonlyVec3} a vector to calculate length of
 * @returns {Number} length of a
 */


function length(a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  return Math.hypot(x, y, z);
}
/**
 * Creates a new vec3 initialized with the given values
 *
 * @param {Number} x X component
 * @param {Number} y Y component
 * @param {Number} z Z component
 * @returns {vec3} a new 3D vector
 */


function fromValues(x, y, z) {
  var out = new glMatrix.ARRAY_TYPE(3);
  out[0] = x;
  out[1] = y;
  out[2] = z;
  return out;
}
/**
 * Copy the values from one vec3 to another
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the source vector
 * @returns {vec3} out
 */


function copy(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  return out;
}
/**
 * Set the components of a vec3 to the given values
 *
 * @param {vec3} out the receiving vector
 * @param {Number} x X component
 * @param {Number} y Y component
 * @param {Number} z Z component
 * @returns {vec3} out
 */


function set(out, x, y, z) {
  out[0] = x;
  out[1] = y;
  out[2] = z;
  return out;
}
/**
 * Adds two vec3's
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {vec3} out
 */


function add(out, a, b) {
  out[0] = a[0] + b[0];
  out[1] = a[1] + b[1];
  out[2] = a[2] + b[2];
  return out;
}
/**
 * Subtracts vector b from vector a
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {vec3} out
 */


function subtract(out, a, b) {
  out[0] = a[0] - b[0];
  out[1] = a[1] - b[1];
  out[2] = a[2] - b[2];
  return out;
}
/**
 * Multiplies two vec3's
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {vec3} out
 */


function multiply(out, a, b) {
  out[0] = a[0] * b[0];
  out[1] = a[1] * b[1];
  out[2] = a[2] * b[2];
  return out;
}
/**
 * Divides two vec3's
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {vec3} out
 */


function divide(out, a, b) {
  out[0] = a[0] / b[0];
  out[1] = a[1] / b[1];
  out[2] = a[2] / b[2];
  return out;
}
/**
 * Math.ceil the components of a vec3
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a vector to ceil
 * @returns {vec3} out
 */


function ceil(out, a) {
  out[0] = Math.ceil(a[0]);
  out[1] = Math.ceil(a[1]);
  out[2] = Math.ceil(a[2]);
  return out;
}
/**
 * Math.floor the components of a vec3
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a vector to floor
 * @returns {vec3} out
 */


function floor(out, a) {
  out[0] = Math.floor(a[0]);
  out[1] = Math.floor(a[1]);
  out[2] = Math.floor(a[2]);
  return out;
}
/**
 * Returns the minimum of two vec3's
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {vec3} out
 */


function min(out, a, b) {
  out[0] = Math.min(a[0], b[0]);
  out[1] = Math.min(a[1], b[1]);
  out[2] = Math.min(a[2], b[2]);
  return out;
}
/**
 * Returns the maximum of two vec3's
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {vec3} out
 */


function max(out, a, b) {
  out[0] = Math.max(a[0], b[0]);
  out[1] = Math.max(a[1], b[1]);
  out[2] = Math.max(a[2], b[2]);
  return out;
}
/**
 * Math.round the components of a vec3
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a vector to round
 * @returns {vec3} out
 */


function round(out, a) {
  out[0] = Math.round(a[0]);
  out[1] = Math.round(a[1]);
  out[2] = Math.round(a[2]);
  return out;
}
/**
 * Scales a vec3 by a scalar number
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the vector to scale
 * @param {Number} b amount to scale the vector by
 * @returns {vec3} out
 */


function scale(out, a, b) {
  out[0] = a[0] * b;
  out[1] = a[1] * b;
  out[2] = a[2] * b;
  return out;
}
/**
 * Adds two vec3's after scaling the second operand by a scalar value
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @param {Number} scale the amount to scale b by before adding
 * @returns {vec3} out
 */


function scaleAndAdd(out, a, b, scale) {
  out[0] = a[0] + b[0] * scale;
  out[1] = a[1] + b[1] * scale;
  out[2] = a[2] + b[2] * scale;
  return out;
}
/**
 * Calculates the euclidian distance between two vec3's
 *
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {Number} distance between a and b
 */


function distance(a, b) {
  var x = b[0] - a[0];
  var y = b[1] - a[1];
  var z = b[2] - a[2];
  return Math.hypot(x, y, z);
}
/**
 * Calculates the squared euclidian distance between two vec3's
 *
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {Number} squared distance between a and b
 */


function squaredDistance(a, b) {
  var x = b[0] - a[0];
  var y = b[1] - a[1];
  var z = b[2] - a[2];
  return x * x + y * y + z * z;
}
/**
 * Calculates the squared length of a vec3
 *
 * @param {ReadonlyVec3} a vector to calculate squared length of
 * @returns {Number} squared length of a
 */


function squaredLength(a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  return x * x + y * y + z * z;
}
/**
 * Negates the components of a vec3
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a vector to negate
 * @returns {vec3} out
 */


function negate(out, a) {
  out[0] = -a[0];
  out[1] = -a[1];
  out[2] = -a[2];
  return out;
}
/**
 * Returns the inverse of the components of a vec3
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a vector to invert
 * @returns {vec3} out
 */


function inverse(out, a) {
  out[0] = 1.0 / a[0];
  out[1] = 1.0 / a[1];
  out[2] = 1.0 / a[2];
  return out;
}
/**
 * Normalize a vec3
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a vector to normalize
 * @returns {vec3} out
 */


function normalize(out, a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  var len = x * x + y * y + z * z;

  if (len > 0) {
    //TODO: evaluate use of glm_invsqrt here?
    len = 1 / Math.sqrt(len);
  }

  out[0] = a[0] * len;
  out[1] = a[1] * len;
  out[2] = a[2] * len;
  return out;
}
/**
 * Calculates the dot product of two vec3's
 *
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {Number} dot product of a and b
 */


function dot(a, b) {
  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}
/**
 * Computes the cross product of two vec3's
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @returns {vec3} out
 */


function cross(out, a, b) {
  var ax = a[0],
      ay = a[1],
      az = a[2];
  var bx = b[0],
      by = b[1],
      bz = b[2];
  out[0] = ay * bz - az * by;
  out[1] = az * bx - ax * bz;
  out[2] = ax * by - ay * bx;
  return out;
}
/**
 * Performs a linear interpolation between two vec3's
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {vec3} out
 */


function lerp(out, a, b, t) {
  var ax = a[0];
  var ay = a[1];
  var az = a[2];
  out[0] = ax + t * (b[0] - ax);
  out[1] = ay + t * (b[1] - ay);
  out[2] = az + t * (b[2] - az);
  return out;
}
/**
 * Performs a hermite interpolation with two control points
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @param {ReadonlyVec3} c the third operand
 * @param {ReadonlyVec3} d the fourth operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {vec3} out
 */


function hermite(out, a, b, c, d, t) {
  var factorTimes2 = t * t;
  var factor1 = factorTimes2 * (2 * t - 3) + 1;
  var factor2 = factorTimes2 * (t - 2) + t;
  var factor3 = factorTimes2 * (t - 1);
  var factor4 = factorTimes2 * (3 - 2 * t);
  out[0] = a[0] * factor1 + b[0] * factor2 + c[0] * factor3 + d[0] * factor4;
  out[1] = a[1] * factor1 + b[1] * factor2 + c[1] * factor3 + d[1] * factor4;
  out[2] = a[2] * factor1 + b[2] * factor2 + c[2] * factor3 + d[2] * factor4;
  return out;
}
/**
 * Performs a bezier interpolation with two control points
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the first operand
 * @param {ReadonlyVec3} b the second operand
 * @param {ReadonlyVec3} c the third operand
 * @param {ReadonlyVec3} d the fourth operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {vec3} out
 */


function bezier(out, a, b, c, d, t) {
  var inverseFactor = 1 - t;
  var inverseFactorTimesTwo = inverseFactor * inverseFactor;
  var factorTimes2 = t * t;
  var factor1 = inverseFactorTimesTwo * inverseFactor;
  var factor2 = 3 * t * inverseFactorTimesTwo;
  var factor3 = 3 * factorTimes2 * inverseFactor;
  var factor4 = factorTimes2 * t;
  out[0] = a[0] * factor1 + b[0] * factor2 + c[0] * factor3 + d[0] * factor4;
  out[1] = a[1] * factor1 + b[1] * factor2 + c[1] * factor3 + d[1] * factor4;
  out[2] = a[2] * factor1 + b[2] * factor2 + c[2] * factor3 + d[2] * factor4;
  return out;
}
/**
 * Generates a random vector with the given scale
 *
 * @param {vec3} out the receiving vector
 * @param {Number} [scale] Length of the resulting vector. If ommitted, a unit vector will be returned
 * @returns {vec3} out
 */


function random(out, scale) {
  scale = scale || 1.0;
  var r = glMatrix.RANDOM() * 2.0 * Math.PI;
  var z = glMatrix.RANDOM() * 2.0 - 1.0;
  var zScale = Math.sqrt(1.0 - z * z) * scale;
  out[0] = Math.cos(r) * zScale;
  out[1] = Math.sin(r) * zScale;
  out[2] = z * scale;
  return out;
}
/**
 * Transforms the vec3 with a mat4.
 * 4th vector component is implicitly '1'
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the vector to transform
 * @param {ReadonlyMat4} m matrix to transform with
 * @returns {vec3} out
 */


function transformMat4(out, a, m) {
  var x = a[0],
      y = a[1],
      z = a[2];
  var w = m[3] * x + m[7] * y + m[11] * z + m[15];
  w = w || 1.0;
  out[0] = (m[0] * x + m[4] * y + m[8] * z + m[12]) / w;
  out[1] = (m[1] * x + m[5] * y + m[9] * z + m[13]) / w;
  out[2] = (m[2] * x + m[6] * y + m[10] * z + m[14]) / w;
  return out;
}
/**
 * Transforms the vec3 with a mat3.
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the vector to transform
 * @param {ReadonlyMat3} m the 3x3 matrix to transform with
 * @returns {vec3} out
 */


function transformMat3(out, a, m) {
  var x = a[0],
      y = a[1],
      z = a[2];
  out[0] = x * m[0] + y * m[3] + z * m[6];
  out[1] = x * m[1] + y * m[4] + z * m[7];
  out[2] = x * m[2] + y * m[5] + z * m[8];
  return out;
}
/**
 * Transforms the vec3 with a quat
 * Can also be used for dual quaternions. (Multiply it with the real part)
 *
 * @param {vec3} out the receiving vector
 * @param {ReadonlyVec3} a the vector to transform
 * @param {ReadonlyQuat} q quaternion to transform with
 * @returns {vec3} out
 */


function transformQuat(out, a, q) {
  // benchmarks: https://jsperf.com/quaternion-transform-vec3-implementations-fixed
  var qx = q[0],
      qy = q[1],
      qz = q[2],
      qw = q[3];
  var x = a[0],
      y = a[1],
      z = a[2]; // var qvec = [qx, qy, qz];
  // var uv = vec3.cross([], qvec, a);

  var uvx = qy * z - qz * y,
      uvy = qz * x - qx * z,
      uvz = qx * y - qy * x; // var uuv = vec3.cross([], qvec, uv);

  var uuvx = qy * uvz - qz * uvy,
      uuvy = qz * uvx - qx * uvz,
      uuvz = qx * uvy - qy * uvx; // vec3.scale(uv, uv, 2 * w);

  var w2 = qw * 2;
  uvx *= w2;
  uvy *= w2;
  uvz *= w2; // vec3.scale(uuv, uuv, 2);

  uuvx *= 2;
  uuvy *= 2;
  uuvz *= 2; // return vec3.add(out, a, vec3.add(out, uv, uuv));

  out[0] = x + uvx + uuvx;
  out[1] = y + uvy + uuvy;
  out[2] = z + uvz + uuvz;
  return out;
}
/**
 * Rotate a 3D vector around the x-axis
 * @param {vec3} out The receiving vec3
 * @param {ReadonlyVec3} a The vec3 point to rotate
 * @param {ReadonlyVec3} b The origin of the rotation
 * @param {Number} rad The angle of rotation in radians
 * @returns {vec3} out
 */


function rotateX(out, a, b, rad) {
  var p = [],
      r = []; //Translate point to the origin

  p[0] = a[0] - b[0];
  p[1] = a[1] - b[1];
  p[2] = a[2] - b[2]; //perform rotation

  r[0] = p[0];
  r[1] = p[1] * Math.cos(rad) - p[2] * Math.sin(rad);
  r[2] = p[1] * Math.sin(rad) + p[2] * Math.cos(rad); //translate to correct position

  out[0] = r[0] + b[0];
  out[1] = r[1] + b[1];
  out[2] = r[2] + b[2];
  return out;
}
/**
 * Rotate a 3D vector around the y-axis
 * @param {vec3} out The receiving vec3
 * @param {ReadonlyVec3} a The vec3 point to rotate
 * @param {ReadonlyVec3} b The origin of the rotation
 * @param {Number} rad The angle of rotation in radians
 * @returns {vec3} out
 */


function rotateY(out, a, b, rad) {
  var p = [],
      r = []; //Translate point to the origin

  p[0] = a[0] - b[0];
  p[1] = a[1] - b[1];
  p[2] = a[2] - b[2]; //perform rotation

  r[0] = p[2] * Math.sin(rad) + p[0] * Math.cos(rad);
  r[1] = p[1];
  r[2] = p[2] * Math.cos(rad) - p[0] * Math.sin(rad); //translate to correct position

  out[0] = r[0] + b[0];
  out[1] = r[1] + b[1];
  out[2] = r[2] + b[2];
  return out;
}
/**
 * Rotate a 3D vector around the z-axis
 * @param {vec3} out The receiving vec3
 * @param {ReadonlyVec3} a The vec3 point to rotate
 * @param {ReadonlyVec3} b The origin of the rotation
 * @param {Number} rad The angle of rotation in radians
 * @returns {vec3} out
 */


function rotateZ(out, a, b, rad) {
  var p = [],
      r = []; //Translate point to the origin

  p[0] = a[0] - b[0];
  p[1] = a[1] - b[1];
  p[2] = a[2] - b[2]; //perform rotation

  r[0] = p[0] * Math.cos(rad) - p[1] * Math.sin(rad);
  r[1] = p[0] * Math.sin(rad) + p[1] * Math.cos(rad);
  r[2] = p[2]; //translate to correct position

  out[0] = r[0] + b[0];
  out[1] = r[1] + b[1];
  out[2] = r[2] + b[2];
  return out;
}
/**
 * Get the angle between two 3D vectors
 * @param {ReadonlyVec3} a The first operand
 * @param {ReadonlyVec3} b The second operand
 * @returns {Number} The angle in radians
 */


function angle(a, b) {
  var ax = a[0],
      ay = a[1],
      az = a[2],
      bx = b[0],
      by = b[1],
      bz = b[2],
      mag1 = Math.sqrt(ax * ax + ay * ay + az * az),
      mag2 = Math.sqrt(bx * bx + by * by + bz * bz),
      mag = mag1 * mag2,
      cosine = mag && dot(a, b) / mag;
  return Math.acos(Math.min(Math.max(cosine, -1), 1));
}
/**
 * Set the components of a vec3 to zero
 *
 * @param {vec3} out the receiving vector
 * @returns {vec3} out
 */


function zero(out) {
  out[0] = 0.0;
  out[1] = 0.0;
  out[2] = 0.0;
  return out;
}
/**
 * Returns a string representation of a vector
 *
 * @param {ReadonlyVec3} a vector to represent as a string
 * @returns {String} string representation of the vector
 */


function str(a) {
  return "vec3(" + a[0] + ", " + a[1] + ", " + a[2] + ")";
}
/**
 * Returns whether or not the vectors have exactly the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyVec3} a The first vector.
 * @param {ReadonlyVec3} b The second vector.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */


function exactEquals(a, b) {
  return a[0] === b[0] && a[1] === b[1] && a[2] === b[2];
}
/**
 * Returns whether or not the vectors have approximately the same elements in the same position.
 *
 * @param {ReadonlyVec3} a The first vector.
 * @param {ReadonlyVec3} b The second vector.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */


function equals(a, b) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2];
  var b0 = b[0],
      b1 = b[1],
      b2 = b[2];
  return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2));
}
/**
 * Alias for {@link vec3.subtract}
 * @function
 */


var sub = subtract;
/**
 * Alias for {@link vec3.multiply}
 * @function
 */

exports.sub = sub;
var mul = multiply;
/**
 * Alias for {@link vec3.divide}
 * @function
 */

exports.mul = mul;
var div = divide;
/**
 * Alias for {@link vec3.distance}
 * @function
 */

exports.div = div;
var dist = distance;
/**
 * Alias for {@link vec3.squaredDistance}
 * @function
 */

exports.dist = dist;
var sqrDist = squaredDistance;
/**
 * Alias for {@link vec3.length}
 * @function
 */

exports.sqrDist = sqrDist;
var len = length;
/**
 * Alias for {@link vec3.squaredLength}
 * @function
 */

exports.len = len;
var sqrLen = squaredLength;
/**
 * Perform some operation over an array of vec3s.
 *
 * @param {Array} a the array of vectors to iterate over
 * @param {Number} stride Number of elements between the start of each vec3. If 0 assumes tightly packed
 * @param {Number} offset Number of elements to skip at the beginning of the array
 * @param {Number} count Number of vec3s to iterate over. If 0 iterates over entire array
 * @param {Function} fn Function to call for each vector in the array
 * @param {Object} [arg] additional argument to pass to fn
 * @returns {Array} a
 * @function
 */

exports.sqrLen = sqrLen;

var forEach = function () {
  var vec = create();
  return function (a, stride, offset, count, fn, arg) {
    var i, l;

    if (!stride) {
      stride = 3;
    }

    if (!offset) {
      offset = 0;
    }

    if (count) {
      l = Math.min(count * stride + offset, a.length);
    } else {
      l = a.length;
    }

    for (i = offset; i < l; i += stride) {
      vec[0] = a[i];
      vec[1] = a[i + 1];
      vec[2] = a[i + 2];
      fn(vec, vec, arg);
      a[i] = vec[0];
      a[i + 1] = vec[1];
      a[i + 2] = vec[2];
    }

    return a;
  };
}();

exports.forEach = forEach;
},{"./common.js":20}],30:[function(require,module,exports){
"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.create = create;
exports.clone = clone;
exports.fromValues = fromValues;
exports.copy = copy;
exports.set = set;
exports.add = add;
exports.subtract = subtract;
exports.multiply = multiply;
exports.divide = divide;
exports.ceil = ceil;
exports.floor = floor;
exports.min = min;
exports.max = max;
exports.round = round;
exports.scale = scale;
exports.scaleAndAdd = scaleAndAdd;
exports.distance = distance;
exports.squaredDistance = squaredDistance;
exports.length = length;
exports.squaredLength = squaredLength;
exports.negate = negate;
exports.inverse = inverse;
exports.normalize = normalize;
exports.dot = dot;
exports.cross = cross;
exports.lerp = lerp;
exports.random = random;
exports.transformMat4 = transformMat4;
exports.transformQuat = transformQuat;
exports.zero = zero;
exports.str = str;
exports.exactEquals = exactEquals;
exports.equals = equals;
exports.forEach = exports.sqrLen = exports.len = exports.sqrDist = exports.dist = exports.div = exports.mul = exports.sub = void 0;

var glMatrix = _interopRequireWildcard(require("./common.js"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function _getRequireWildcardCache() { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || _typeof(obj) !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

/**
 * 4 Dimensional Vector
 * @module vec4
 */

/**
 * Creates a new, empty vec4
 *
 * @returns {vec4} a new 4D vector
 */
function create() {
  var out = new glMatrix.ARRAY_TYPE(4);

  if (glMatrix.ARRAY_TYPE != Float32Array) {
    out[0] = 0;
    out[1] = 0;
    out[2] = 0;
    out[3] = 0;
  }

  return out;
}
/**
 * Creates a new vec4 initialized with values from an existing vector
 *
 * @param {ReadonlyVec4} a vector to clone
 * @returns {vec4} a new 4D vector
 */


function clone(a) {
  var out = new glMatrix.ARRAY_TYPE(4);
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  return out;
}
/**
 * Creates a new vec4 initialized with the given values
 *
 * @param {Number} x X component
 * @param {Number} y Y component
 * @param {Number} z Z component
 * @param {Number} w W component
 * @returns {vec4} a new 4D vector
 */


function fromValues(x, y, z, w) {
  var out = new glMatrix.ARRAY_TYPE(4);
  out[0] = x;
  out[1] = y;
  out[2] = z;
  out[3] = w;
  return out;
}
/**
 * Copy the values from one vec4 to another
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the source vector
 * @returns {vec4} out
 */


function copy(out, a) {
  out[0] = a[0];
  out[1] = a[1];
  out[2] = a[2];
  out[3] = a[3];
  return out;
}
/**
 * Set the components of a vec4 to the given values
 *
 * @param {vec4} out the receiving vector
 * @param {Number} x X component
 * @param {Number} y Y component
 * @param {Number} z Z component
 * @param {Number} w W component
 * @returns {vec4} out
 */


function set(out, x, y, z, w) {
  out[0] = x;
  out[1] = y;
  out[2] = z;
  out[3] = w;
  return out;
}
/**
 * Adds two vec4's
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {vec4} out
 */


function add(out, a, b) {
  out[0] = a[0] + b[0];
  out[1] = a[1] + b[1];
  out[2] = a[2] + b[2];
  out[3] = a[3] + b[3];
  return out;
}
/**
 * Subtracts vector b from vector a
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {vec4} out
 */


function subtract(out, a, b) {
  out[0] = a[0] - b[0];
  out[1] = a[1] - b[1];
  out[2] = a[2] - b[2];
  out[3] = a[3] - b[3];
  return out;
}
/**
 * Multiplies two vec4's
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {vec4} out
 */


function multiply(out, a, b) {
  out[0] = a[0] * b[0];
  out[1] = a[1] * b[1];
  out[2] = a[2] * b[2];
  out[3] = a[3] * b[3];
  return out;
}
/**
 * Divides two vec4's
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {vec4} out
 */


function divide(out, a, b) {
  out[0] = a[0] / b[0];
  out[1] = a[1] / b[1];
  out[2] = a[2] / b[2];
  out[3] = a[3] / b[3];
  return out;
}
/**
 * Math.ceil the components of a vec4
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a vector to ceil
 * @returns {vec4} out
 */


function ceil(out, a) {
  out[0] = Math.ceil(a[0]);
  out[1] = Math.ceil(a[1]);
  out[2] = Math.ceil(a[2]);
  out[3] = Math.ceil(a[3]);
  return out;
}
/**
 * Math.floor the components of a vec4
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a vector to floor
 * @returns {vec4} out
 */


function floor(out, a) {
  out[0] = Math.floor(a[0]);
  out[1] = Math.floor(a[1]);
  out[2] = Math.floor(a[2]);
  out[3] = Math.floor(a[3]);
  return out;
}
/**
 * Returns the minimum of two vec4's
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {vec4} out
 */


function min(out, a, b) {
  out[0] = Math.min(a[0], b[0]);
  out[1] = Math.min(a[1], b[1]);
  out[2] = Math.min(a[2], b[2]);
  out[3] = Math.min(a[3], b[3]);
  return out;
}
/**
 * Returns the maximum of two vec4's
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {vec4} out
 */


function max(out, a, b) {
  out[0] = Math.max(a[0], b[0]);
  out[1] = Math.max(a[1], b[1]);
  out[2] = Math.max(a[2], b[2]);
  out[3] = Math.max(a[3], b[3]);
  return out;
}
/**
 * Math.round the components of a vec4
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a vector to round
 * @returns {vec4} out
 */


function round(out, a) {
  out[0] = Math.round(a[0]);
  out[1] = Math.round(a[1]);
  out[2] = Math.round(a[2]);
  out[3] = Math.round(a[3]);
  return out;
}
/**
 * Scales a vec4 by a scalar number
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the vector to scale
 * @param {Number} b amount to scale the vector by
 * @returns {vec4} out
 */


function scale(out, a, b) {
  out[0] = a[0] * b;
  out[1] = a[1] * b;
  out[2] = a[2] * b;
  out[3] = a[3] * b;
  return out;
}
/**
 * Adds two vec4's after scaling the second operand by a scalar value
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @param {Number} scale the amount to scale b by before adding
 * @returns {vec4} out
 */


function scaleAndAdd(out, a, b, scale) {
  out[0] = a[0] + b[0] * scale;
  out[1] = a[1] + b[1] * scale;
  out[2] = a[2] + b[2] * scale;
  out[3] = a[3] + b[3] * scale;
  return out;
}
/**
 * Calculates the euclidian distance between two vec4's
 *
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {Number} distance between a and b
 */


function distance(a, b) {
  var x = b[0] - a[0];
  var y = b[1] - a[1];
  var z = b[2] - a[2];
  var w = b[3] - a[3];
  return Math.hypot(x, y, z, w);
}
/**
 * Calculates the squared euclidian distance between two vec4's
 *
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {Number} squared distance between a and b
 */


function squaredDistance(a, b) {
  var x = b[0] - a[0];
  var y = b[1] - a[1];
  var z = b[2] - a[2];
  var w = b[3] - a[3];
  return x * x + y * y + z * z + w * w;
}
/**
 * Calculates the length of a vec4
 *
 * @param {ReadonlyVec4} a vector to calculate length of
 * @returns {Number} length of a
 */


function length(a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  var w = a[3];
  return Math.hypot(x, y, z, w);
}
/**
 * Calculates the squared length of a vec4
 *
 * @param {ReadonlyVec4} a vector to calculate squared length of
 * @returns {Number} squared length of a
 */


function squaredLength(a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  var w = a[3];
  return x * x + y * y + z * z + w * w;
}
/**
 * Negates the components of a vec4
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a vector to negate
 * @returns {vec4} out
 */


function negate(out, a) {
  out[0] = -a[0];
  out[1] = -a[1];
  out[2] = -a[2];
  out[3] = -a[3];
  return out;
}
/**
 * Returns the inverse of the components of a vec4
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a vector to invert
 * @returns {vec4} out
 */


function inverse(out, a) {
  out[0] = 1.0 / a[0];
  out[1] = 1.0 / a[1];
  out[2] = 1.0 / a[2];
  out[3] = 1.0 / a[3];
  return out;
}
/**
 * Normalize a vec4
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a vector to normalize
 * @returns {vec4} out
 */


function normalize(out, a) {
  var x = a[0];
  var y = a[1];
  var z = a[2];
  var w = a[3];
  var len = x * x + y * y + z * z + w * w;

  if (len > 0) {
    len = 1 / Math.sqrt(len);
  }

  out[0] = x * len;
  out[1] = y * len;
  out[2] = z * len;
  out[3] = w * len;
  return out;
}
/**
 * Calculates the dot product of two vec4's
 *
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @returns {Number} dot product of a and b
 */


function dot(a, b) {
  return a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + a[3] * b[3];
}
/**
 * Returns the cross-product of three vectors in a 4-dimensional space
 *
 * @param {ReadonlyVec4} result the receiving vector
 * @param {ReadonlyVec4} U the first vector
 * @param {ReadonlyVec4} V the second vector
 * @param {ReadonlyVec4} W the third vector
 * @returns {vec4} result
 */


function cross(out, u, v, w) {
  var A = v[0] * w[1] - v[1] * w[0],
      B = v[0] * w[2] - v[2] * w[0],
      C = v[0] * w[3] - v[3] * w[0],
      D = v[1] * w[2] - v[2] * w[1],
      E = v[1] * w[3] - v[3] * w[1],
      F = v[2] * w[3] - v[3] * w[2];
  var G = u[0];
  var H = u[1];
  var I = u[2];
  var J = u[3];
  out[0] = H * F - I * E + J * D;
  out[1] = -(G * F) + I * C - J * B;
  out[2] = G * E - H * C + J * A;
  out[3] = -(G * D) + H * B - I * A;
  return out;
}
/**
 * Performs a linear interpolation between two vec4's
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the first operand
 * @param {ReadonlyVec4} b the second operand
 * @param {Number} t interpolation amount, in the range [0-1], between the two inputs
 * @returns {vec4} out
 */


function lerp(out, a, b, t) {
  var ax = a[0];
  var ay = a[1];
  var az = a[2];
  var aw = a[3];
  out[0] = ax + t * (b[0] - ax);
  out[1] = ay + t * (b[1] - ay);
  out[2] = az + t * (b[2] - az);
  out[3] = aw + t * (b[3] - aw);
  return out;
}
/**
 * Generates a random vector with the given scale
 *
 * @param {vec4} out the receiving vector
 * @param {Number} [scale] Length of the resulting vector. If ommitted, a unit vector will be returned
 * @returns {vec4} out
 */


function random(out, scale) {
  scale = scale || 1.0; // Marsaglia, George. Choosing a Point from the Surface of a
  // Sphere. Ann. Math. Statist. 43 (1972), no. 2, 645--646.
  // http://projecteuclid.org/euclid.aoms/1177692644;

  var v1, v2, v3, v4;
  var s1, s2;

  do {
    v1 = glMatrix.RANDOM() * 2 - 1;
    v2 = glMatrix.RANDOM() * 2 - 1;
    s1 = v1 * v1 + v2 * v2;
  } while (s1 >= 1);

  do {
    v3 = glMatrix.RANDOM() * 2 - 1;
    v4 = glMatrix.RANDOM() * 2 - 1;
    s2 = v3 * v3 + v4 * v4;
  } while (s2 >= 1);

  var d = Math.sqrt((1 - s1) / s2);
  out[0] = scale * v1;
  out[1] = scale * v2;
  out[2] = scale * v3 * d;
  out[3] = scale * v4 * d;
  return out;
}
/**
 * Transforms the vec4 with a mat4.
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the vector to transform
 * @param {ReadonlyMat4} m matrix to transform with
 * @returns {vec4} out
 */


function transformMat4(out, a, m) {
  var x = a[0],
      y = a[1],
      z = a[2],
      w = a[3];
  out[0] = m[0] * x + m[4] * y + m[8] * z + m[12] * w;
  out[1] = m[1] * x + m[5] * y + m[9] * z + m[13] * w;
  out[2] = m[2] * x + m[6] * y + m[10] * z + m[14] * w;
  out[3] = m[3] * x + m[7] * y + m[11] * z + m[15] * w;
  return out;
}
/**
 * Transforms the vec4 with a quat
 *
 * @param {vec4} out the receiving vector
 * @param {ReadonlyVec4} a the vector to transform
 * @param {ReadonlyQuat} q quaternion to transform with
 * @returns {vec4} out
 */


function transformQuat(out, a, q) {
  var x = a[0],
      y = a[1],
      z = a[2];
  var qx = q[0],
      qy = q[1],
      qz = q[2],
      qw = q[3]; // calculate quat * vec

  var ix = qw * x + qy * z - qz * y;
  var iy = qw * y + qz * x - qx * z;
  var iz = qw * z + qx * y - qy * x;
  var iw = -qx * x - qy * y - qz * z; // calculate result * inverse quat

  out[0] = ix * qw + iw * -qx + iy * -qz - iz * -qy;
  out[1] = iy * qw + iw * -qy + iz * -qx - ix * -qz;
  out[2] = iz * qw + iw * -qz + ix * -qy - iy * -qx;
  out[3] = a[3];
  return out;
}
/**
 * Set the components of a vec4 to zero
 *
 * @param {vec4} out the receiving vector
 * @returns {vec4} out
 */


function zero(out) {
  out[0] = 0.0;
  out[1] = 0.0;
  out[2] = 0.0;
  out[3] = 0.0;
  return out;
}
/**
 * Returns a string representation of a vector
 *
 * @param {ReadonlyVec4} a vector to represent as a string
 * @returns {String} string representation of the vector
 */


function str(a) {
  return "vec4(" + a[0] + ", " + a[1] + ", " + a[2] + ", " + a[3] + ")";
}
/**
 * Returns whether or not the vectors have exactly the same elements in the same position (when compared with ===)
 *
 * @param {ReadonlyVec4} a The first vector.
 * @param {ReadonlyVec4} b The second vector.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */


function exactEquals(a, b) {
  return a[0] === b[0] && a[1] === b[1] && a[2] === b[2] && a[3] === b[3];
}
/**
 * Returns whether or not the vectors have approximately the same elements in the same position.
 *
 * @param {ReadonlyVec4} a The first vector.
 * @param {ReadonlyVec4} b The second vector.
 * @returns {Boolean} True if the vectors are equal, false otherwise.
 */


function equals(a, b) {
  var a0 = a[0],
      a1 = a[1],
      a2 = a[2],
      a3 = a[3];
  var b0 = b[0],
      b1 = b[1],
      b2 = b[2],
      b3 = b[3];
  return Math.abs(a0 - b0) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= glMatrix.EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3));
}
/**
 * Alias for {@link vec4.subtract}
 * @function
 */


var sub = subtract;
/**
 * Alias for {@link vec4.multiply}
 * @function
 */

exports.sub = sub;
var mul = multiply;
/**
 * Alias for {@link vec4.divide}
 * @function
 */

exports.mul = mul;
var div = divide;
/**
 * Alias for {@link vec4.distance}
 * @function
 */

exports.div = div;
var dist = distance;
/**
 * Alias for {@link vec4.squaredDistance}
 * @function
 */

exports.dist = dist;
var sqrDist = squaredDistance;
/**
 * Alias for {@link vec4.length}
 * @function
 */

exports.sqrDist = sqrDist;
var len = length;
/**
 * Alias for {@link vec4.squaredLength}
 * @function
 */

exports.len = len;
var sqrLen = squaredLength;
/**
 * Perform some operation over an array of vec4s.
 *
 * @param {Array} a the array of vectors to iterate over
 * @param {Number} stride Number of elements between the start of each vec4. If 0 assumes tightly packed
 * @param {Number} offset Number of elements to skip at the beginning of the array
 * @param {Number} count Number of vec4s to iterate over. If 0 iterates over entire array
 * @param {Function} fn Function to call for each vector in the array
 * @param {Object} [arg] additional argument to pass to fn
 * @returns {Array} a
 * @function
 */

exports.sqrLen = sqrLen;

var forEach = function () {
  var vec = create();
  return function (a, stride, offset, count, fn, arg) {
    var i, l;

    if (!stride) {
      stride = 4;
    }

    if (!offset) {
      offset = 0;
    }

    if (count) {
      l = Math.min(count * stride + offset, a.length);
    } else {
      l = a.length;
    }

    for (i = offset; i < l; i += stride) {
      vec[0] = a[i];
      vec[1] = a[i + 1];
      vec[2] = a[i + 2];
      vec[3] = a[i + 3];
      fn(vec, vec, arg);
      a[i] = vec[0];
      a[i + 1] = vec[1];
      a[i + 2] = vec[2];
      a[i + 3] = vec[3];
    }

    return a;
  };
}();

exports.forEach = forEach;
},{"./common.js":20}],31:[function(require,module,exports){
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

'use strict';

var R = typeof Reflect === 'object' ? Reflect : null
var ReflectApply = R && typeof R.apply === 'function'
  ? R.apply
  : function ReflectApply(target, receiver, args) {
    return Function.prototype.apply.call(target, receiver, args);
  }

var ReflectOwnKeys
if (R && typeof R.ownKeys === 'function') {
  ReflectOwnKeys = R.ownKeys
} else if (Object.getOwnPropertySymbols) {
  ReflectOwnKeys = function ReflectOwnKeys(target) {
    return Object.getOwnPropertyNames(target)
      .concat(Object.getOwnPropertySymbols(target));
  };
} else {
  ReflectOwnKeys = function ReflectOwnKeys(target) {
    return Object.getOwnPropertyNames(target);
  };
}

function ProcessEmitWarning(warning) {
  if (console && console.warn) console.warn(warning);
}

var NumberIsNaN = Number.isNaN || function NumberIsNaN(value) {
  return value !== value;
}

function EventEmitter() {
  EventEmitter.init.call(this);
}
module.exports = EventEmitter;
module.exports.once = once;

// Backwards-compat with node 0.10.x
EventEmitter.EventEmitter = EventEmitter;

EventEmitter.prototype._events = undefined;
EventEmitter.prototype._eventsCount = 0;
EventEmitter.prototype._maxListeners = undefined;

// By default EventEmitters will print a warning if more than 10 listeners are
// added to it. This is a useful default which helps finding memory leaks.
var defaultMaxListeners = 10;

function checkListener(listener) {
  if (typeof listener !== 'function') {
    throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
  }
}

Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
  enumerable: true,
  get: function() {
    return defaultMaxListeners;
  },
  set: function(arg) {
    if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {
      throw new RangeError('The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' + arg + '.');
    }
    defaultMaxListeners = arg;
  }
});

EventEmitter.init = function() {

  if (this._events === undefined ||
      this._events === Object.getPrototypeOf(this)._events) {
    this._events = Object.create(null);
    this._eventsCount = 0;
  }

  this._maxListeners = this._maxListeners || undefined;
};

// Obviously not all Emitters should be limited to 10. This function allows
// that to be increased. Set to zero for unlimited.
EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
  if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {
    throw new RangeError('The value of "n" is out of range. It must be a non-negative number. Received ' + n + '.');
  }
  this._maxListeners = n;
  return this;
};

function _getMaxListeners(that) {
  if (that._maxListeners === undefined)
    return EventEmitter.defaultMaxListeners;
  return that._maxListeners;
}

EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
  return _getMaxListeners(this);
};

EventEmitter.prototype.emit = function emit(type) {
  var args = [];
  for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);
  var doError = (type === 'error');

  var events = this._events;
  if (events !== undefined)
    doError = (doError && events.error === undefined);
  else if (!doError)
    return false;

  // If there is no 'error' event listener then throw.
  if (doError) {
    var er;
    if (args.length > 0)
      er = args[0];
    if (er instanceof Error) {
      // Note: The comments on the `throw` lines are intentional, they show
      // up in Node's output if this results in an unhandled exception.
      throw er; // Unhandled 'error' event
    }
    // At least give some kind of context to the user
    var err = new Error('Unhandled error.' + (er ? ' (' + er.message + ')' : ''));
    err.context = er;
    throw err; // Unhandled 'error' event
  }

  var handler = events[type];

  if (handler === undefined)
    return false;

  if (typeof handler === 'function') {
    ReflectApply(handler, this, args);
  } else {
    var len = handler.length;
    var listeners = arrayClone(handler, len);
    for (var i = 0; i < len; ++i)
      ReflectApply(listeners[i], this, args);
  }

  return true;
};

function _addListener(target, type, listener, prepend) {
  var m;
  var events;
  var existing;

  checkListener(listener);

  events = target._events;
  if (events === undefined) {
    events = target._events = Object.create(null);
    target._eventsCount = 0;
  } else {
    // To avoid recursion in the case that type === "newListener"! Before
    // adding it to the listeners, first emit "newListener".
    if (events.newListener !== undefined) {
      target.emit('newListener', type,
                  listener.listener ? listener.listener : listener);

      // Re-assign `events` because a newListener handler could have caused the
      // this._events to be assigned to a new object
      events = target._events;
    }
    existing = events[type];
  }

  if (existing === undefined) {
    // Optimize the case of one listener. Don't need the extra array object.
    existing = events[type] = listener;
    ++target._eventsCount;
  } else {
    if (typeof existing === 'function') {
      // Adding the second element, need to change to array.
      existing = events[type] =
        prepend ? [listener, existing] : [existing, listener];
      // If we've already got an array, just append.
    } else if (prepend) {
      existing.unshift(listener);
    } else {
      existing.push(listener);
    }

    // Check for listener leak
    m = _getMaxListeners(target);
    if (m > 0 && existing.length > m && !existing.warned) {
      existing.warned = true;
      // No error code for this since it is a Warning
      // eslint-disable-next-line no-restricted-syntax
      var w = new Error('Possible EventEmitter memory leak detected. ' +
                          existing.length + ' ' + String(type) + ' listeners ' +
                          'added. Use emitter.setMaxListeners() to ' +
                          'increase limit');
      w.name = 'MaxListenersExceededWarning';
      w.emitter = target;
      w.type = type;
      w.count = existing.length;
      ProcessEmitWarning(w);
    }
  }

  return target;
}

EventEmitter.prototype.addListener = function addListener(type, listener) {
  return _addListener(this, type, listener, false);
};

EventEmitter.prototype.on = EventEmitter.prototype.addListener;

EventEmitter.prototype.prependListener =
    function prependListener(type, listener) {
      return _addListener(this, type, listener, true);
    };

function onceWrapper() {
  if (!this.fired) {
    this.target.removeListener(this.type, this.wrapFn);
    this.fired = true;
    if (arguments.length === 0)
      return this.listener.call(this.target);
    return this.listener.apply(this.target, arguments);
  }
}

function _onceWrap(target, type, listener) {
  var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
  var wrapped = onceWrapper.bind(state);
  wrapped.listener = listener;
  state.wrapFn = wrapped;
  return wrapped;
}

EventEmitter.prototype.once = function once(type, listener) {
  checkListener(listener);
  this.on(type, _onceWrap(this, type, listener));
  return this;
};

EventEmitter.prototype.prependOnceListener =
    function prependOnceListener(type, listener) {
      checkListener(listener);
      this.prependListener(type, _onceWrap(this, type, listener));
      return this;
    };

// Emits a 'removeListener' event if and only if the listener was removed.
EventEmitter.prototype.removeListener =
    function removeListener(type, listener) {
      var list, events, position, i, originalListener;

      checkListener(listener);

      events = this._events;
      if (events === undefined)
        return this;

      list = events[type];
      if (list === undefined)
        return this;

      if (list === listener || list.listener === listener) {
        if (--this._eventsCount === 0)
          this._events = Object.create(null);
        else {
          delete events[type];
          if (events.removeListener)
            this.emit('removeListener', type, list.listener || listener);
        }
      } else if (typeof list !== 'function') {
        position = -1;

        for (i = list.length - 1; i >= 0; i--) {
          if (list[i] === listener || list[i].listener === listener) {
            originalListener = list[i].listener;
            position = i;
            break;
          }
        }

        if (position < 0)
          return this;

        if (position === 0)
          list.shift();
        else {
          spliceOne(list, position);
        }

        if (list.length === 1)
          events[type] = list[0];

        if (events.removeListener !== undefined)
          this.emit('removeListener', type, originalListener || listener);
      }

      return this;
    };

EventEmitter.prototype.off = EventEmitter.prototype.removeListener;

EventEmitter.prototype.removeAllListeners =
    function removeAllListeners(type) {
      var listeners, events, i;

      events = this._events;
      if (events === undefined)
        return this;

      // not listening for removeListener, no need to emit
      if (events.removeListener === undefined) {
        if (arguments.length === 0) {
          this._events = Object.create(null);
          this._eventsCount = 0;
        } else if (events[type] !== undefined) {
          if (--this._eventsCount === 0)
            this._events = Object.create(null);
          else
            delete events[type];
        }
        return this;
      }

      // emit removeListener for all listeners on all events
      if (arguments.length === 0) {
        var keys = Object.keys(events);
        var key;
        for (i = 0; i < keys.length; ++i) {
          key = keys[i];
          if (key === 'removeListener') continue;
          this.removeAllListeners(key);
        }
        this.removeAllListeners('removeListener');
        this._events = Object.create(null);
        this._eventsCount = 0;
        return this;
      }

      listeners = events[type];

      if (typeof listeners === 'function') {
        this.removeListener(type, listeners);
      } else if (listeners !== undefined) {
        // LIFO order
        for (i = listeners.length - 1; i >= 0; i--) {
          this.removeListener(type, listeners[i]);
        }
      }

      return this;
    };

function _listeners(target, type, unwrap) {
  var events = target._events;

  if (events === undefined)
    return [];

  var evlistener = events[type];
  if (evlistener === undefined)
    return [];

  if (typeof evlistener === 'function')
    return unwrap ? [evlistener.listener || evlistener] : [evlistener];

  return unwrap ?
    unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
}

EventEmitter.prototype.listeners = function listeners(type) {
  return _listeners(this, type, true);
};

EventEmitter.prototype.rawListeners = function rawListeners(type) {
  return _listeners(this, type, false);
};

EventEmitter.listenerCount = function(emitter, type) {
  if (typeof emitter.listenerCount === 'function') {
    return emitter.listenerCount(type);
  } else {
    return listenerCount.call(emitter, type);
  }
};

EventEmitter.prototype.listenerCount = listenerCount;
function listenerCount(type) {
  var events = this._events;

  if (events !== undefined) {
    var evlistener = events[type];

    if (typeof evlistener === 'function') {
      return 1;
    } else if (evlistener !== undefined) {
      return evlistener.length;
    }
  }

  return 0;
}

EventEmitter.prototype.eventNames = function eventNames() {
  return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
};

function arrayClone(arr, n) {
  var copy = new Array(n);
  for (var i = 0; i < n; ++i)
    copy[i] = arr[i];
  return copy;
}

function spliceOne(list, index) {
  for (; index + 1 < list.length; index++)
    list[index] = list[index + 1];
  list.pop();
}

function unwrapListeners(arr) {
  var ret = new Array(arr.length);
  for (var i = 0; i < ret.length; ++i) {
    ret[i] = arr[i].listener || arr[i];
  }
  return ret;
}

function once(emitter, name) {
  return new Promise(function (resolve, reject) {
    function errorListener(err) {
      emitter.removeListener(name, resolver);
      reject(err);
    }

    function resolver() {
      if (typeof emitter.removeListener === 'function') {
        emitter.removeListener('error', errorListener);
      }
      resolve([].slice.call(arguments));
    };

    eventTargetAgnosticAddListener(emitter, name, resolver, { once: true });
    if (name !== 'error') {
      addErrorHandlerIfEventEmitter(emitter, errorListener, { once: true });
    }
  });
}

function addErrorHandlerIfEventEmitter(emitter, handler, flags) {
  if (typeof emitter.on === 'function') {
    eventTargetAgnosticAddListener(emitter, 'error', handler, flags);
  }
}

function eventTargetAgnosticAddListener(emitter, name, listener, flags) {
  if (typeof emitter.on === 'function') {
    if (flags.once) {
      emitter.once(name, listener);
    } else {
      emitter.on(name, listener);
    }
  } else if (typeof emitter.addEventListener === 'function') {
    // EventTarget does not have `error` event semantics like Node
    // EventEmitters, we do not listen for `error` events here.
    emitter.addEventListener(name, function wrapListener(arg) {
      // IE does not have builtin `{ once: true }` support so we
      // have to do it manually.
      if (flags.once) {
        emitter.removeEventListener(name, wrapListener);
      }
      listener(arg);
    });
  } else {
    throw new TypeError('The "emitter" argument must be of type EventEmitter. Received type ' + typeof emitter);
  }
}

},{}],32:[function(require,module,exports){
// shim for using process in browser
var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

var cachedSetTimeout;
var cachedClearTimeout;

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;

process.listeners = function (name) { return [] }

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],33:[function(require,module,exports){
'use strict';

module.exports = function () {
  throw new Error(
    'ws does not work in the browser. Browser clients must use the native ' +
      'WebSocket object'
  );
};

},{}],34:[function(require,module,exports){
if (typeof (window) !== 'undefined'){
  if (typeof (window.requestAnimationFrame) !== 'function') {
    window.requestAnimationFrame = (
      window.webkitRequestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      window.oRequestAnimationFrame ||
      window.msRequestAnimationFrame ||
      function (callback) { setTimeout(callback, 1000 / 60); }
    );
  }
  window.Leap = require("../lib/index");
} else {
  Leap = require("../lib/index");
}

},{"../lib/index":11}]},{},[34]);