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uv_2_ball_3it.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - interactive - voxel painter</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
</head>
<body>
<div id="info">
<div>
<button id="color-picker" >选择颜色</button>
</div>
<button onclick="saveModels()" style="background: #00ffff">保存</button>
</div>
<script src="libs/three.js"></script>
<script src="libs/Detector.js"></script>
<script src="libs/OrbitControls.js"></script>
<script src="libs/hilbert2D.js"></script>
<script src="libs/hilbert3D.js"></script>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script>
if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var camera, scene, renderer;
var plane, cube;
var mouse, raycaster, isShiftDown = false;
var rollOverMesh, rollOverMaterial;
var cubeGeo, cubeMaterial;
var objects = [];
var voxels = []
var earth_raduis = 180
var cubeLen
var cubeMap={}
var objects=[]
var points = []
var points2d
var indexIn2d = 0
var hilbert3DIt = 3
init();
render();
animate();
function init() {
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.set( 500, 800, 1300 );
camera.lookAt( new THREE.Vector3() );
scene = new THREE.Scene();
scene.background = new THREE.Color( 0x000000 );
// lights
var ambientLight = new THREE.AmbientLight( 0x606060 );
scene.add( ambientLight );
var directionalLight = new THREE.DirectionalLight( 0xffffff );
directionalLight.position.set( 1, 0.75, 0.5 ).normalize();
scene.add( directionalLight );
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );
window.addEventListener( 'resize', onWindowResize, false );
var controls = new THREE.OrbitControls( camera, renderer.domElement);
controls.minDistance = 2;
controls.maxDistance = 5000;
controls.maxPolarAngle = Math.PI;
//create earth
//alert(objects.length)
render();
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
function onDocumentMouseMove( event ) {
event.preventDefault();
mouse.set( ( event.clientX / window.innerWidth ) * 2 - 1, - ( event.clientY / window.innerHeight ) * 2 + 1 );
raycaster.setFromCamera( mouse, camera );
var intersects = raycaster.intersectObjects( objects );
if ( intersects.length > 0 ) {
var intersect = intersects[ 0 ];
rollOverMesh.position.copy( intersect.object.position ).add( intersect.face.normal.multiplyScalar(cubeLen) );
//rollOverMesh.position.divideScalar( 50 ).floor().multiplyScalar( 50 ).addScalar( 25 );
}
render();
}
function render() {
renderer.render( scene, camera );
}
function animate() {
render();
requestAnimationFrame( animate );
}
var cubeLen = 2
var earth_raduis = 180
imgTodata("/textures/earth/earth.jpg",earth_raduis,1,0xff0000,"test",function(globes){
//console.log(globes)
})
function imgTodata(src, r, d, pcolor, name, imgCallBack) {
var imgData = [];
var image = new Image;
image.src = src;
var hilbertPoints = hilbert3D( new THREE.Vector3( 0, 0, 0 ), earth_raduis, hilbert3DIt, 0, 1, 2, 3, 4, 5, 6, 7 )
cubeLen = (earth_raduis*2)/Math.pow(hilbertPoints.length,1/3)
// alert("start:"+hilbertPoints.length)
cubeGeo = new THREE.BoxBufferGeometry( cubeLen, cubeLen, cubeLen );
for(var i=0;i<hilbertPoints.length;i++){
var point = hilbertPoints[i]
var dis = Math.sqrt(
Math.pow(point.x,2)+
Math.pow(point.y,2)+
Math.pow(point.z,2))
if(dis>earth_raduis*9/10&& dis<earth_raduis*11/10){
points.push(point)
}
}
image.onload = function () {
var canvas = document.createElement("canvas");
canvas.width = image.width;
canvas.height = image.height;
imgData.width = image.width;
imgData.height = image.height;
var context = canvas.getContext("2d");
context.drawImage(image, 0, 0, image.width, image.height);
var data = context.getImageData(0, 0, canvas.width, canvas.height);
var dLength = data.data.length;
var sampleCount = 2
for (var i = 0; i < dLength; i += 4) {
var x = (i / 4) % canvas.width;
var y = (i / 4 - x) / canvas.width;
if (sampleCount==1||(i / 4 % sampleCount == 1 && y % sampleCount == 1)) {
var u = (360 / canvas.width) * x - 180;
var v = (180 / canvas.height) * y - 90;
var xyz = uvToxyz(u, v, r);
imgData.push(xyz);
//var point = new THREE.Vector3(xyz[0],xyz[1],xyz[2])
var point = belongToHilbert(xyz)
if(! point){
continue
}
var color = (data.data[i]<<(4*4))+
(data.data[i + 1]<<(2*4))+
data.data[i + 2]
var shellMaterial= new THREE.MeshPhongMaterial({
color:color,//三角面颜色
side:THREE.DoubleSide//两面可见
});
var voxel = new THREE.Mesh( cubeGeo, shellMaterial );
voxel.position.set(point.x,point.y,point.z)
objects.push( voxel );
voxels.push(voxel)
scene.add( voxel );
}
}
alert("voxels len:"+voxels.length)
saveModels()
}
}
// 经纬度 转 xyz uv to xyz
function uvToxyz(u, v, r) {
var wd = (u + 90) * Math.PI / 180,
jd = v * Math.PI / 180,
x = -r * Math.cos(jd) * Math.cos(wd),
y = -r * Math.sin(jd),
z = r * Math.cos(jd) * Math.sin(wd);
return [x, y, z];
}
function belongToHilbert(pos){
for(var i=0;i<points.length;i++){
var point = points[i]
var dis = Math.sqrt(
Math.pow(point.x-pos[0],2)+
Math.pow(point.y-pos[1],2)+
Math.pow(point.z-pos[2],2))
if(dis<cubeLen/2){
points.splice(i,1)
return point
}
}
return null
}
function saveModels(){
var positions = []
for(var i=0;i<voxels.length;i++){
var voxel = voxels[i]
var p = {"x":voxel.position.x,"y":voxel.position.y,"z":voxel.position.z,"color":voxel.material.color}
positions.push(p)
}
var json = JSON.stringify(positions)
$.ajax({
type: 'POST',
url: "saveModel",
data: json,
success: function(data, textStatus, jqXHR){
alert(data)
},
dataType: "text"
});
}
</script>
</body>
</html>