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CubeWorker.js
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CubeWorker.js
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"use strict";
(function() {
function randomIntWithMax(max) {
return Math.floor(Math.random()*max);
}
var d;
function getTimer() {
if (!d) {
d = (new Date()).getTime();
return 0;
} else {
var x = (new Date()).getTime();
var y = x - d;
d = x;
return y;
}
}
function sendConsoleMessage(msg) {
postMessage({type: "message", msg: msg});
}
function sendProgressMessage(line) {
postMessage({type: "progress", line: line, time: getTimer()});
}
function messageHandler(event) {
if (event.data.type == "generateTables") {
generateTables();
postMessage({type: "CoordCube"});
} else if (event.data.type == "verify") {
postMessage({type: "verify", result: verify(event.data.cube), cube: event.data.cube});
} else if (event.data.type == "random") {
var random = randomCube();
postMessage({type: "random", result: random});
} else if (event.data.type == "generateTable") {
generateTable(event.data.table, event.data);
} else if (event.data.type == "CoordCube") {
for (var i in event.data.cc) {
if (i.indexOf("Slice") == 0) {
CoordCube[i] = new Int8Array(event.data.cc[i]);
} else {
CoordCube[i] = event.data.cc[i];
}
}
} else if (event.data.type == "solve") {
var x = Search.solution(event.data.cube, event.data.maxDepth || 20, event.data.maxTime || 10, !!event.data.useSeparator);
if (x.indexOf("Error") == -1) {
x = x.substring(0,x.length - 1);
}
postMessage({type: "solution", result: x, cube: event.data.cube});
}
}
addEventListener("message",messageHandler,false);
function enumvar(number,string) {
Object.defineProperty(this, "number", {
value: number,
enumerable: true
});
Object.defineProperty(this, "string", {
value: string,
enumerable: true
});
};
enumvar.prototype.toString = function() {
return this.string;
};
enumvar.prototype.ordinal = function() {
return this.number;
};
function makeEnum(a) {
var o = {};
for (var i = 0; i < a.length; i++) {
var x = new enumvar(i,a[i]);
o[a[i]] = x;
self[a[i]] = x;
}
Object.defineProperty(o, "valueOf", {
value: function(a) {
return this[a];
},
writable: false,
configurable: false,
enumerable: false
});
return o;
}
Number.prototype.ordinal = function() {
return this+0;
}
var Color = makeEnum(["U", "R", "F", "D", "L", "B"]);
var Facelet = makeEnum(["U1", "U2", "U3", "U4", "U5", "U6", "U7", "U8", "U9", "R1", "R2", "R3", "R4", "R5", "R6", "R7", "R8", "R9", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9", "D1", "D2", "D3", "D4", "D5", "D6", "D7", "D8", "D9", "L1", "L2", "L3", "L4", "L5", "L6", "L7", "L8", "L9", "B1", "B2", "B3", "B4", "B5", "B6", "B7", "B8", "B9"]);
var Corner = makeEnum(["URF", "UFL", "ULB", "UBR", "DFR", "DLF", "DBL", "DRB"]);
var Edge = makeEnum(["UR", "UF", "UL", "UB", "DR", "DF", "DL", "DB", "FR", "FL", "BL", "BR"]);
function verify(s) {
// Check if the cube string s represents a solvable cube.
// 0: Cube is solvable
// -1: There is not exactly one facelet of each colour
// -2: Not all 12 edges exist exactly once
// -3: Flip error: One edge has to be flipped
// -4: Not all corners exist exactly once
// -5: Twist error: One corner has to be twisted
// -6: Parity error: Two corners or two edges have to be exchanged
var count = new Int32Array(6);
try{
for (var i = 0; i < 54; i++) {
count[Color[s.charAt(i)].ordinal()]++;
}
}catch(e) {
return -1;
}
for (var i = 0; i < 6; i++) {
if (count[i] != 9) {
return -1;
}
}
var fc = new FaceCube(s);
var cc = fc.toCubieCube();
return cc.verify();
}
function randomCube() {
var cc = new CubieCube();
cc.setFlip(randomIntWithMax(N_FLIP));
cc.setTwist(randomIntWithMax(N_TWIST));
do {
cc.setURFtoDLB(randomIntWithMax(N_URFtoDLB));
cc.setURtoBR(randomIntWithMax(N_URtoBR));
} while ((cc.edgeParity() ^ cc.cornerParity()) != 0);
var fc = cc.toFaceCube();
return fc.toString();
}
var cornerFacelet = [ [ U9, R1, F3 ], [ U7, F1, L3 ], [ U1, L1, B3 ], [ U3, B1, R3 ], [ D3, F9, R7 ], [ D1, L9, F7 ], [ D7, B9, L7 ], [ D9, R9, B7 ] ];
var edgeFacelet = [ [ U6, R2 ], [ U8, F2 ], [ U4, L2 ], [ U2, B2 ], [ D6, R8 ], [ D2, F8 ], [ D4, L8 ], [ D8, B8 ], [ F6, R4 ], [ F4, L6 ], [ B6, L4 ], [ B4, R6 ] ];
var cornerColor = [ [ U, R, F ], [ U, F, L ], [ U, L, B ], [ U, B, R ], [ D, F, R ], [ D, L, F ], [ D, B, L ], [ D, R, B ] ];
var edgeColor = [ [ U, R ], [ U, F ], [ U, L ], [ U, B ], [ D, R ], [ D, F ], [ D, L ], [ D, B ], [ F, R ], [ F, L ], [ B, L ], [ B, R ] ];
function FaceCube(s) {
this.f = [];
if (!s) {
s = "UUUUUUUUURRRRRRRRRFFFFFFFFFDDDDDDDDDLLLLLLLLLBBBBBBBBB";
}
for (var i = 0; i < 54; i++) {
this.f[i] = Color[s.charAt(i)];
}
};
FaceCube.prototype.toString = function() {
var s = "";
for (var i = 0; i < 54; i++) {
s += this.f[i].toString();
}
return s;
};
FaceCube.prototype.toCubieCube = function() {
var ori;
var ccRet = new CubieCube();
for (var i = 0; i < 8; i++)
ccRet.cp[i] = URF;// invalidate corners
for (var i = 0; i < 12; i++)
ccRet.ep[i] = UR;// and edges
var col1, col2;
for (var i in Corner) {
i = Corner[i];
// get the colors of the cubie at corner i, starting with U/D
for (ori = 0; ori < 3; ori++)
if (this.f[cornerFacelet[i.ordinal()][ori].ordinal()] == U || this.f[cornerFacelet[i.ordinal()][ori].ordinal()] == D)
break;
col1 = this.f[cornerFacelet[i.ordinal()][(ori + 1) % 3].ordinal()];
col2 = this.f[cornerFacelet[i.ordinal()][(ori + 2) % 3].ordinal()];
for (var j in Corner) {
j = Corner[j];
if (col1 == cornerColor[j.ordinal()][1] && col2 == cornerColor[j.ordinal()][2]) {
// in cornerposition i we have cornercubie j
ccRet.cp[i.ordinal()] = j;
ccRet.co[i.ordinal()] = (ori % 3);
break;
}
}
}
for (var i in Edge) {
i = Edge[i];
for (var j in Edge) {
j = Edge[j];
if (this.f[edgeFacelet[i.ordinal()][0].ordinal()].toString() == edgeColor[j.ordinal()][0].toString()
&& this.f[edgeFacelet[i.ordinal()][1].ordinal()].toString() == edgeColor[j.ordinal()][1].toString()) {
ccRet.ep[i.ordinal()] = j;
ccRet.eo[i.ordinal()] = 0;
break;
}
if (this.f[edgeFacelet[i.ordinal()][0].ordinal()].toString() == edgeColor[j.ordinal()][1].toString()
&& this.f[edgeFacelet[i.ordinal()][1].ordinal()].toString() == edgeColor[j.ordinal()][0].toString()) {
ccRet.ep[i.ordinal()] = j;
ccRet.eo[i.ordinal()] = 1;
break;
}
}
}
return ccRet;
};
function Cnk(n, k) {
// n choose k
var i, j, s;
if (n < k)
return 0;
if (k > (n / 2) | 0)
k = n - k;
for (s = 1, i = n, j = 1; i != n - k; i--, j++) {
s *= i;
s /= j;
s = s | 0;
}
return s;
}
function CubieCube(cp,co,ep,eo) {
if (cp && co && ep && eo) {
this.cp = cp;
this.co = new Int8Array(co);
this.ep = ep;
this.eo = new Int8Array(eo);
} else {
this.cp = [ URF, UFL, ULB, UBR, DFR, DLF, DBL, DRB ];
this.co = new Int8Array([ 0, 0, 0, 0, 0, 0, 0, 0 ]);
this.ep = [ UR, UF, UL, UB, DR, DF, DL, DB, FR, FL, BL, BR ];
this.eo = new Int8Array([ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ]);
}
}
CubieCube.prototype.rotateLeft = function(arr, l, r)
// Left rotation of all array elements between l and r
{
var temp = arr[l];
for (var i = l; i < r; i++)
arr[i] = arr[i + 1];
arr[r] = temp;
};
CubieCube.prototype.rotateRight = function(arr, l, r)
// Right rotation of all array elements between l and r
{
var temp = arr[r];
for (var i = r; i > l; i--)
arr[i] = arr[i - 1];
arr[l] = temp;
};
CubieCube.prototype.toFaceCube = function() {
var fcRet = new FaceCube();
for (var c in Corner) {
c = Corner[c];
var i = c.ordinal();
var j = this.cp[i].ordinal();// cornercubie with index j is at
// cornerposition with index i
var ori = this.co[i];// Orientation of this cubie
for (var n = 0; n < 3; n++)
fcRet.f[cornerFacelet[i][(n + ori) % 3].ordinal()] = cornerColor[j][n];
}
for (var e in Edge) {
e = Edge[e];
var i = e.ordinal();
var j = this.ep[i].ordinal();// edgecubie with index j is at edgeposition
// with index i
var ori = this.eo[i];// Orientation of this cubie
for (var n = 0; n < 2; n++)
fcRet.f[edgeFacelet[i][(n + ori) % 2].ordinal()] = edgeColor[j][n];
}
return fcRet;
};
CubieCube.prototype.cornerMultiply = function(b) {
var cPerm = [];
var cOri = new Int8Array(8);
for (var corn in Corner) {
corn = Corner[corn];
cPerm[corn.ordinal()] = this.cp[b.cp[corn.ordinal()].ordinal()];
var oriA = this.co[b.cp[corn.ordinal()].ordinal()];
var oriB = b.co[corn.ordinal()].ordinal();
var ori = 0;
if (oriA < 3 && oriB < 3) // if both cubes are regular cubes...
{
ori = (oriA + oriB); // just do an addition modulo 3 here
if (ori >= 3)
ori -= 3; // the composition is a regular cube
// +++++++++++++++++++++not used in this implementation +++++++++++++++++++++++++++++++++++
} else if (oriA < 3 && oriB >= 3) // if cube b is in a mirrored
// state...
{
ori = (oriA + oriB);
if (ori >= 6)
ori -= 3; // the composition is a mirrored cube
} else if (oriA >= 3 && oriB < 3) // if cube a is an a mirrored
// state...
{
ori = (oriA - oriB);
if (ori < 3)
ori += 3; // the composition is a mirrored cube
} else if (oriA >= 3 && oriB >= 3) // if both cubes are in mirrored
// states...
{
ori = (oriA - oriB);
if (ori < 0)
ori += 3; // the composition is a regular cube
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
}
cOri[corn.ordinal()] = ori;
}
for (var c in Corner) {
c = Corner[c];
this.cp[c.ordinal()] = cPerm[c.ordinal()];
this.co[c.ordinal()] = cOri[c.ordinal()];
}
};
CubieCube.prototype.multiply = function(b) {
this.cornerMultiply(b);
};
CubieCube.prototype.edgeMultiply = function(b) {
var ePerm = [];
var eOri = new Int8Array(12);
for (var edge in Edge) {
edge = Edge[edge];
ePerm[edge.ordinal()] = this.ep[b.ep[edge.ordinal()].ordinal()];
eOri[edge.ordinal()] = ((b.eo[edge.ordinal()] + this.eo[b.ep[edge.ordinal()].ordinal()]) % 2);
}
for (var e in Edge) {
e = Edge[e];
this.ep[e.ordinal()] = ePerm[e.ordinal()];
this.eo[e.ordinal()] = eOri[e.ordinal()];
}
};
CubieCube.prototype.invCubieCube = function(c) {
for (var edge in Edge) {
edge = Edge[edge];
c.ep[this.ep[edge.ordinal()].ordinal()] = edge;
}
for (var edge in Edge) {
edge = Edge[edge];
c.eo[edge.ordinal()] = this.eo[c.ep[edge.ordinal()].ordinal()];
}
for (var corn in Corner) {
corn = Corner[corn];
c.cp[this.cp[corn.ordinal()].ordinal()] = corn;
}
for (var corn in Corner) {
corn = Corner[corn];
var ori = this.co[c.cp[corn.ordinal()].ordinal()];
if (ori >= 3)// Just for completeness. We do not invert mirrored
// cubes in the program.
c.co[corn.ordinal()] = ori;
else {// the standard case
c.co[corn.ordinal()] = -ori;
if (c.co[corn.ordinal()] < 0)
c.co[corn.ordinal()] += 3;
}
}
};
CubieCube.prototype.getTwist = function() {
var ret = 0;
for (var i = URF.ordinal(); i < DRB.ordinal(); i++)
ret = (3 * ret + this.co[i]);
return ret;
};
CubieCube.prototype.setTwist = function(twist) {
var twistParity = 0;
for (var i = DRB.ordinal() - 1; i >= URF.ordinal(); i--) {
twistParity += this.co[i] = (twist % 3);
twist /= 3;
twist = twist | 0;
}
this.co[DRB.ordinal()] = ((3 - twistParity % 3) % 3);
};
CubieCube.prototype.getFlip = function() {
var ret = 0;
for (var i = UR.ordinal(); i < BR.ordinal(); i++)
ret = (2 * ret + this.eo[i]);
return ret;
};
CubieCube.prototype.setFlip = function(flip) {
var flipParity = 0;
for (var i = BR.ordinal() - 1; i >= UR.ordinal(); i--) {
flipParity += this.eo[i] = (flip % 2);
flip /= 2;
flip = flip | 0;
}
this.eo[BR.ordinal()] = ((2 - flipParity % 2) % 2);
};
CubieCube.prototype.cornerParity = function() {
var s = 0;
for (var i = DRB.ordinal(); i >= URF.ordinal() + 1; i--)
for (var j = i - 1; j >= URF.ordinal(); j--)
if (this.cp[j].ordinal() > this.cp[i].ordinal())
s++;
return (s % 2);
};
CubieCube.prototype.edgeParity = function() {
var s = 0;
for (var i = BR.ordinal(); i >= UR.ordinal() + 1; i--)
for (var j = i - 1; j >= UR.ordinal(); j--)
if (this.ep[j].ordinal() > this.ep[i].ordinal())
s++;
return (s % 2);
};
CubieCube.prototype.getFRtoBR = function() {
var a = 0, x = 0;
var edge4 = [];
// compute the index a < (12 choose 4) and the permutation array perm.
for (var j = BR.ordinal(); j >= UR.ordinal(); j--)
if (FR.ordinal() <= this.ep[j].ordinal() && this.ep[j].ordinal() <= BR.ordinal()) {
a += Cnk(11 - j, x + 1);
edge4[3 - x++] = this.ep[j];
}
var b = 0;
for (var j = 3; j > 0; j--)// compute the index b < 4! for the
// permutation in perm
{
var k = 0;
while (edge4[j].ordinal() != j + 8) {
this.rotateLeft(edge4, 0, j);
k++;
}
b = (j + 1) * b + k;
}
return (24 * a + b);
};
CubieCube.prototype.setFRtoBR = function(idx) {
var x;
var sliceEdge = [ FR, FL, BL, BR ];
var otherEdge = [ UR, UF, UL, UB, DR, DF, DL, DB ];
var b = idx % 24; // Permutation
var a = (idx / 24) | 0; // Combination
for (var e in Edge) {
e = Edge[e];
this.ep[e.ordinal()] = DB;// Use UR to invalidate all edges
}
for (var j = 1, k; j < 4; j++)// generate permutation from index b
{
k = b % (j + 1);
b /= j + 1;
b = b | 0;
while (k-- > 0)
this.rotateRight(sliceEdge, 0, j);
}
x = 3;// generate combination and set slice edges
for (var j = UR.ordinal(); j <= BR.ordinal(); j++)
if (a - Cnk(11 - j, x + 1) >= 0) {
this.ep[j] = sliceEdge[3 - x];
a -= Cnk(11 - j, x-- + 1);
}
x = 0; // set the remaining edges UR..DB
for (var j = UR.ordinal(); j <= BR.ordinal(); j++)
if (this.ep[j] == DB)
this.ep[j] = otherEdge[x++];
};
CubieCube.prototype.getURFtoDLF = function() {
var a = 0, x = 0;
var corner6 = [];
// compute the index a < (8 choose 6) and the corner permutation.
for (var j = URF.ordinal(); j <= DRB.ordinal(); j++)
if (this.cp[j].ordinal() <= DLF.ordinal()) {
a += Cnk(j, x + 1);
corner6[x++] = this.cp[j];
}
var b = 0;
for (var j = 5; j > 0; j--)// compute the index b < 6! for the
// permutation in corner6
{
var k = 0;
while (corner6[j].ordinal() != j) {
this.rotateLeft(corner6, 0, j);
k++;
}
b = (j + 1) * b + k;
}
return (720 * a + b);
};
CubieCube.prototype.setURFtoDLF = function(idx) {
var x;
var corner6 = [ URF, UFL, ULB, UBR, DFR, DLF ];
var otherCorner = [ DBL, DRB ];
var b = idx % 720; // Permutation
var a = (idx / 720) | 0; // Combination
for (var c in Corner) {
c = Corner[c];
this.cp[c.ordinal()] = DRB;// Use DRB to invalidate all corners
}
for (var j = 1, k; j < 6; j++)// generate permutation from index b
{
k = b % (j + 1);
b /= j + 1;
b = b | 0;
while (k-- > 0)
this.rotateRight(corner6, 0, j);
}
x = 5;// generate combination and set corners
for (var j = DRB.ordinal(); j >= 0; j--)
if (a - Cnk(j, x + 1) >= 0) {
this.cp[j] = corner6[x];
a -= Cnk(j, x-- + 1);
}
x = 0;
for (var j = URF.ordinal(); j <= DRB.ordinal(); j++)
if (this.cp[j] == DRB)
this.cp[j] = otherCorner[x++];
};
CubieCube.prototype.getURtoDF = function() {
var a = 0, x = 0;
var edge6 = [];
// compute the index a < (12 choose 6) and the edge permutation.
for (var j = UR.ordinal(); j <= BR.ordinal(); j++)
if (this.ep[j].ordinal() <= DF.ordinal()) {
a += Cnk(j, x + 1);
edge6[x++] = this.ep[j];
}
var b = 0;
for (var j = 5; j > 0; j--)// compute the index b < 6! for the
// permutation in edge6
{
var k = 0;
while (edge6[j].ordinal() != j) {
this.rotateLeft(edge6, 0, j);
k++;
}
b = (j + 1) * b + k;
}
return 720 * a + b;
};
CubieCube.prototype.setURtoDF = function(idx) {
var x;
var edge6 = [ UR, UF, UL, UB, DR, DF ];
var otherEdge = [ DL, DB, FR, FL, BL, BR ];
var b = idx % 720; // Permutation
var a = (idx / 720) | 0; // Combination
for (var e in Edge) {
e = Edge[e];
this.ep[e.ordinal()] = BR;// Use BR to invalidate all edges
}
for (var j = 1, k; j < 6; j++)// generate permutation from index b
{
k = b % (j + 1);
b /= j + 1;
b = b | 0;
while (k-- > 0)
this.rotateRight(edge6, 0, j);
}
x = 5;// generate combination and set edges
for (var j = BR.ordinal(); j >= 0; j--)
if (a - Cnk(j, x + 1) >= 0) {
this.ep[j] = edge6[x];
a -= Cnk(j, x-- + 1);
}
x = 0; // set the remaining edges DL..BR
for (var j = UR.ordinal(); j <= BR.ordinal(); j++)
if (this.ep[j] == BR)
this.ep[j] = otherEdge[x++];
};
CubieCube.prototype.getURtoUL = function() {
var a = 0, x = 0;
var edge3 = [];
// compute the index a < (12 choose 3) and the edge permutation.
for (var j = UR.ordinal(); j <= BR.ordinal(); j++)
if (this.ep[j].ordinal() <= UL.ordinal()) {
a += Cnk(j, x + 1);
edge3[x++] = this.ep[j];
}
var b = 0;
for (var j = 2; j > 0; j--)// compute the index b < 3! for the
// permutation in edge3
{
var k = 0;
while (edge3[j].ordinal() != j) {
this.rotateLeft(edge3, 0, j);
k++;
}
b = (j + 1) * b + k;
}
return (6 * a + b);
};
CubieCube.prototype.setURtoUL = function(idx) {
var x;
var edge3 = [ UR, UF, UL ];
var b = idx % 6; // Permutation
var a = (idx / 6) | 0; // Combination
for (var e in Edge) {
e = Edge[e];
this.ep[e.ordinal()] = BR;// Use BR to invalidate all edges
}
for (var j = 1, k; j < 3; j++)// generate permutation from index b
{
k = b % (j + 1);
b /= j + 1;
b = b | 0;
while (k-- > 0)
this.rotateRight(edge3, 0, j);
}
x = 2;// generate combination and set edges
for (var j = BR.ordinal(); j >= 0; j--)
if (a - Cnk(j, x + 1) >= 0) {
this.ep[j] = edge3[x];
a -= Cnk(j, x-- + 1);
}
};
CubieCube.prototype.getUBtoDF = function() {
var a = 0, x = 0;
var edge3 = [];
// compute the index a < (12 choose 3) and the edge permutation.
for (var j = UR.ordinal(); j <= BR.ordinal(); j++)
if (UB.ordinal() <= this.ep[j].ordinal() && this.ep[j].ordinal() <= DF.ordinal()) {
a += Cnk(j, x + 1);
edge3[x++] = this.ep[j];
}
var b = 0;
for (var j = 2; j > 0; j--)// compute the index b < 3! for the
// permutation in edge3
{
var k = 0;
while (edge3[j].ordinal() != UB.ordinal() + j) {
this.rotateLeft(edge3, 0, j);
k++;
}
b = (j + 1) * b + k;
}
return (6 * a + b);
};
CubieCube.prototype.setUBtoDF = function(idx) {
var x;
var edge3 = [ UB, DR, DF ];
var b = idx % 6; // Permutation
var a = (idx / 6) | 0; // Combination
for (var e in Edge) {
e = Edge[e];
this.ep[e.ordinal()] = BR;// Use BR to invalidate all edges
}
for (var j = 1, k; j < 3; j++)// generate permutation from index b
{
k = b % (j + 1);
b /= j + 1;
b = b | 0;
while (k-- > 0)
this.rotateRight(edge3, 0, j);
}
x = 2;// generate combination and set edges
for (var j = BR.ordinal(); j >= 0; j--)
if (a - Cnk(j, x + 1) >= 0) {
this.ep[j] = edge3[x];
a -= Cnk(j, x-- + 1);
}
};
CubieCube.prototype.getURFtoDLB = function() {
var perm = [];
var b = 0;
for (var i = 0; i < 8; i++)
perm[i] = this.cp[i];
for (var j = 7; j > 0; j--)// compute the index b < 8! for the permutation in perm
{
var k = 0;
while (perm[j].ordinal() != j) {
this.rotateLeft(perm, 0, j);
k++;
}
b = (j + 1) * b + k;
}
return b;
};
CubieCube.prototype.setURFtoDLB = function(idx) {
var perm = [ URF, UFL, ULB, UBR, DFR, DLF, DBL, DRB ];
var k;
for (var j = 1; j < 8; j++) {
k = idx % (j + 1);
idx /= j + 1;
idx = idx | 0;
while (k-- > 0)
this.rotateRight(perm, 0, j);
}
var x = 7;// set corners
for (var j = 7; j >= 0; j--)
this.cp[j] = perm[x--];
};
CubieCube.prototype.getURtoBR = function() {
var perm = [];
var b = 0;
for (var i = 0; i < 12; i++)
perm[i] = this.ep[i];
for (var j = 11; j > 0; j--)// compute the index b < 12! for the permutation in perm
{
var k = 0;
while (perm[j].ordinal() != j) {
this.rotateLeft(perm, 0, j);
k++;
}
b = (j + 1) * b + k;
}
return b;
};
CubieCube.prototype.setURtoBR = function(idx) {
var perm = [ UR, UF, UL, UB, DR, DF, DL, DB, FR, FL, BL, BR ];
var k;
for (var j = 1; j < 12; j++) {
k = idx % (j + 1);
idx /= j + 1;
idx = idx | 0;
while (k-- > 0)
this.rotateRight(perm, 0, j);
}
var x = 11;// set edges
for (var j = 11; j >= 0; j--)
this.ep[j] = perm[x--];
};
// Check a cubiecube for solvability. Return the error code.
// 0: Cube is solvable
// -2: Not all 12 edges exist exactly once
// -3: Flip error: One edge has to be flipped
// -4: Not all corners exist exactly once
// -5: Twist error: One corner has to be twisted
// -6: Parity error: Two corners ore two edges have to be exchanged
CubieCube.prototype.verify = function() {
var sum = 0;
var edgeCount = new Int32Array(12);
for (var e in Edge) {
e = Edge[e];
edgeCount[this.ep[e.ordinal()].ordinal()]++;
}
for (var i = 0; i < 12; i++)
if (edgeCount[i] != 1)
return -2;
for (var i = 0; i < 12; i++)
sum += this.eo[i];
if (sum % 2 != 0)
return -3;
var cornerCount = new Int32Array(8);
for (var c in Corner) {
c = Corner[c];
cornerCount[this.cp[c.ordinal()].ordinal()]++;
}
for (var i = 0; i < 8; i++)
if (cornerCount[i] != 1)
return -4;// missing corners
sum = 0;
for (var i = 0; i < 8; i++) {
sum += this.co[i];
}
if (sum % 3 != 0) {
return -5;// twisted corner
}
if ((this.edgeParity() ^ this.cornerParity()) != 0)
return -6;// parity error
return 0;// cube ok
};
CubieCube.getURtoDF = function(idx1, idx2) {
var a = new CubieCube();
var b = new CubieCube();
a.setURtoUL(idx1);
b.setUBtoDF(idx2);
for (var i = 0; i < 8; i++) {
if (a.ep[i] != BR)
if (b.ep[i] != BR)// collision
return -1;
else
b.ep[i] = a.ep[i];
}
return b.getURtoDF();
}
CubieCube.moveCube = [
new CubieCube([UBR, URF, UFL, ULB, DFR, DLF, DBL, DRB],[0, 0, 0, 0, 0, 0, 0, 0],[UB, UR, UF, UL, DR, DF, DL, DB, FR, FL, BL, BR],[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]),
new CubieCube([DFR, UFL, ULB, URF, DRB, DLF, DBL, UBR],[2, 0, 0, 1, 1, 0, 0, 2],[FR, UF, UL, UB, BR, DF, DL, DB, DR, FL, BL, UR],[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]),
new CubieCube([UFL, DLF, ULB, UBR, URF, DFR, DBL, DRB],[1, 2, 0, 0, 2, 1, 0, 0],[UR, FL, UL, UB, DR, FR, DL, DB, UF, DF, BL, BR],[0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0]),
new CubieCube([URF, UFL, ULB, UBR, DLF, DBL, DRB, DFR],[0, 0, 0, 0, 0, 0, 0, 0],[UR, UF, UL, UB, DF, DL, DB, DR, FR, FL, BL, BR],[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]),
new CubieCube([URF, ULB, DBL, UBR, DFR, UFL, DLF, DRB],[0, 1, 2, 0, 0, 2, 1, 0],[UR, UF, BL, UB, DR, DF, FL, DB, FR, UL, DL, BR],[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]),
new CubieCube([URF, UFL, UBR, DRB, DFR, DLF, ULB, DBL],[0, 0, 1, 2, 0, 0, 2, 1],[UR, UF, UL, BR, DR, DF, DL, BL, FR, FL, UB, DB],[0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1])
];
var N_TWIST = 2187;
var N_FLIP = 2048;
var N_SLICE1 = 495;
var N_SLICE2 = 24;
var N_PARITY = 2;
var N_URFtoDLF = 20160;
var N_FRtoBR = 11880;
var N_URtoUL = 1320;
var N_UBtoDF = 1320;
var N_URtoDF = 20160;
var N_URFtoDLB = 40320;
var N_URtoBR = 479001600;
var N_MOVE = 18;
function CoordCube(c) {
this.twist = c.getTwist();
this.flip = c.getFlip();
this.parity = c.cornerParity();
this.FRtoBR = c.getFRtoBR();
this.URFtoDLF = c.getURFtoDLF();
this.URtoUL = c.getURtoUL();
this.UBtoDF = c.getUBtoDF();
this.URtoDF = c.getURtoDF();
this.move = function(m) {
this.twist = CoordCube.twistMove[this.twist][m];
this.flip = CoordCube.flipMove[this.flip][m];
this.parity = CoordCube.parityMove[this.parity][m];
this.FRtoBR = CoordCube.FRtoBR_Move[this.FRtoBR][m];
this.URFtoDLF = CoordCube.URFtoDLF_Move[this.URFtoDLF][m];
this.URtoUL = CoordCube.URtoUL_Move[this.URtoUL][m];
this.UBtoDF = CoordCube.UBtoDF_Move[this.UBtoDF][m];
if (this.URtoUL < 336 && this.UBtoDF < 336)// updated only if UR,UF,UL,UB,DR,DF
// are not in UD-slice
this.URtoDF = CoordCube.MergeURtoULandUBtoDF[this.URtoUL][this.UBtoDF];
}
}
CoordCube.parityMove = [
new Int16Array([ 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1 ]),
new Int16Array([ 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0 ])
];
CoordCube.N_TWIST = 2187;
CoordCube.N_FLIP = 2048;
CoordCube.N_SLICE1 = 495;
CoordCube.N_SLICE2 = 24;
CoordCube.N_PARITY = 2;
CoordCube.N_URFtoDLF = 20160;
CoordCube.N_FRtoBR = 11880;
CoordCube.N_URtoUL = 1320;
CoordCube.N_UBtoDF = 1320;
CoordCube.N_URtoDF = 20160;
CoordCube.N_URFtoDLB = 40320;
CoordCube.N_URtoBR = 479001600;
CoordCube.N_MOVE = 18;
CoordCube.setPruning = function(table,index,value) {
if ((index & 1) == 0)
table[index / 2] &= 0xf0 | value;
else
table[(index / 2) | 0] &= 0x0f | (value << 4);
}
CoordCube.getPruning = function(table,index) {
if ((index & 1) == 0)
return (table[index / 2] & 0x0f);
else
return ((table[(index / 2) | 0] & 0xf0) >>> 4);
}
function generateArray(a,c,d) {
var b = [];
for (var i = 0; i < a; i++) {
if (c) {
b[i] = new c(d);
} else {
b.push([]);
}
}
return b;
}
function generateTwistMove() {
var twistMove = generateArray(N_TWIST);
var a = new CubieCube();
for (var i = 0; i < N_TWIST; i++) {
a.setTwist(i);
for (var j = 0; j < 6; j++) {
for (var k = 0; k < 3; k++) {
a.cornerMultiply(CubieCube.moveCube[j]);
twistMove[i][3 * j + k] = a.getTwist();
}
a.cornerMultiply(CubieCube.moveCube[j]);// 4. faceturn restores
// a
}
}
return twistMove;
}
function generateFlipMove() {
var flipMove = generateArray(N_FLIP);
var a = new CubieCube();
for (var i = 0; i < N_FLIP; i++) {
a.setFlip(i);
for (var j = 0; j < 6; j++) {
for (var k = 0; k < 3; k++) {
a.edgeMultiply(CubieCube.moveCube[j]);
flipMove[i][3 * j + k] = a.getFlip();
}
a.edgeMultiply(CubieCube.moveCube[j]);
// a
}
}
return flipMove;
}
function generateFRtoBR_Move() {
var FRtoBR_Move = generateArray(N_FRtoBR,Int16Array,N_MOVE);
var a = new CubieCube();
for (var i = 0; i < N_FRtoBR; i++) {
a.setFRtoBR(i);
for (var j = 0; j < 6; j++) {
for (var k = 0; k < 3; k++) {
a.edgeMultiply(CubieCube.moveCube[j]);
FRtoBR_Move[i][3 * j + k] = a.getFRtoBR();
}
a.edgeMultiply(CubieCube.moveCube[j]);
}
}
return FRtoBR_Move;
}
function generateURFtoDLF_Move() {
var URFtoDLF_Move = generateArray(N_URFtoDLF,Int16Array,N_MOVE);
var a = new CubieCube();
for (var i = 0; i < N_URFtoDLF; i++) {
a.setURFtoDLF(i);
for (var j = 0; j < 6; j++) {
for (var k = 0; k < 3; k++) {
a.cornerMultiply(CubieCube.moveCube[j]);
URFtoDLF_Move[i][3 * j + k] = a.getURFtoDLF();
}
a.cornerMultiply(CubieCube.moveCube[j]);
}
}
return URFtoDLF_Move;
}
function generateURtoDF_Move() {
var URtoDF_Move = generateArray(N_URtoDF,Int16Array,N_MOVE);
var a = new CubieCube();
for (var i = 0; i < N_URtoDF; i++) {
a.setURtoDF(i);
for (var j = 0; j < 6; j++) {
for (var k = 0; k < 3; k++) {
a.edgeMultiply(CubieCube.moveCube[j]);
URtoDF_Move[i][3 * j + k] = a.getURtoDF();
// Table values are only valid for phase 2 moves!
// For phase 1 moves, casting to short is not possible.
}
a.edgeMultiply(CubieCube.moveCube[j]);
}
}
return URtoDF_Move;
}
function generateURtoUL_Move() {
var URtoUL_Move = generateArray(N_URtoUL,Int16Array,N_MOVE);
var a = new CubieCube();
for (var i = 0; i < N_URtoUL; i++) {
a.setURtoUL(i);
for (var j = 0; j < 6; j++) {
for (var k = 0; k < 3; k++) {
a.edgeMultiply(CubieCube.moveCube[j]);
URtoUL_Move[i][3 * j + k] = a.getURtoUL();
}
a.edgeMultiply(CubieCube.moveCube[j]);
}
}
return URtoUL_Move;
}
function generateUBtoDF_Move() {
var UBtoDF_Move = generateArray(N_UBtoDF,Int16Array,N_MOVE);
var a = new CubieCube();
for (var i = 0; i < N_UBtoDF; i++) {
a.setUBtoDF(i);
for (var j = 0; j < 6; j++) {
for (var k = 0; k < 3; k++) {
a.edgeMultiply(CubieCube.moveCube[j]);
UBtoDF_Move[i][3 * j + k] = a.getUBtoDF();
}
a.edgeMultiply(CubieCube.moveCube[j]);
}
}
return UBtoDF_Move;
}
function generateMergeURtoULandUBtoDF() {
var MergeURtoULandUBtoDF = generateArray(336,Int16Array,336);
for (var uRtoUL = 0; uRtoUL < 336; uRtoUL++) {
for (var uBtoDF = 0; uBtoDF < 336; uBtoDF++) {
MergeURtoULandUBtoDF[uRtoUL][uBtoDF] = CubieCube.getURtoDF(uRtoUL, uBtoDF);
}
}
return MergeURtoULandUBtoDF;
}
function generateSlice_URFtoDLF_Parity_Prun(FRtoBR_Move, URFtoDLF_Move) {
var Slice_URFtoDLF_Parity_Prun = new Int8Array((N_SLICE2 * N_URFtoDLF * N_PARITY / 2) | 0);
for (var i = 0; i < (N_SLICE2 * N_URFtoDLF * N_PARITY / 2) | 0; i++)
Slice_URFtoDLF_Parity_Prun[i] = -1;
var depth = 0;
CoordCube.setPruning(Slice_URFtoDLF_Parity_Prun, 0, 0);
var done = 1;
while (done != N_SLICE2 * N_URFtoDLF * N_PARITY) {
for (var i = 0; i < N_SLICE2 * N_URFtoDLF * N_PARITY; i++) {
var parity = i % 2;
var URFtoDLF = (((i / 2) | 0) / N_SLICE2) | 0;
var slice = (((i / 2) | 0) % N_SLICE2);
if (CoordCube.getPruning(Slice_URFtoDLF_Parity_Prun, i) == depth) {
for (var j = 0; j < 18; j++) {
switch (j) {
case 3:
case 5:
case 6:
case 8:
case 12:
case 14:
case 15:
case 17:
continue;
default:
var newSlice = FRtoBR_Move[slice][j];
var newURFtoDLF = URFtoDLF_Move[URFtoDLF][j];
var newParity = CoordCube.parityMove[parity][j];
if (CoordCube.getPruning(Slice_URFtoDLF_Parity_Prun, (N_SLICE2 * newURFtoDLF + newSlice) * 2 + newParity) == 0x0f) {
CoordCube.setPruning(Slice_URFtoDLF_Parity_Prun, (N_SLICE2 * newURFtoDLF + newSlice) * 2 + newParity, (depth + 1));