89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
var scrambler223 = (function(circle, get8Perm) {
|
|
var cmv = [];
|
|
var cprun = [];
|
|
|
|
function initCornerMoveTable() {
|
|
var g = [],
|
|
temp;
|
|
for (var i = 0; i < 40320; i++) {
|
|
cmv[i] = [];
|
|
}
|
|
for (var i = 0; i < 40320; i++) {
|
|
mathlib.set8Perm(g, i);
|
|
circle(g, 0, 1, 2, 3);
|
|
temp = cmv[0][i] = get8Perm(g); //U
|
|
circle(g, 4, 5, 6, 7);
|
|
temp = cmv[1][temp] = get8Perm(g); //D
|
|
circle(g, 2, 5)(g, 3, 6);
|
|
temp = cmv[2][temp] = get8Perm(g); //R
|
|
circle(g, 0, 5)(g, 3, 4);
|
|
cmv[3][temp] = get8Perm(g); //F
|
|
}
|
|
}
|
|
|
|
function doEdgeMove(idx, m) {
|
|
if (m < 2) {
|
|
return idx;
|
|
}
|
|
var g = [];
|
|
mathlib.set8Perm(g, idx, 3);
|
|
if (m == 2) {
|
|
circle(g, 0, 1);
|
|
} else if (m == 3) {
|
|
circle(g, 0, 2);
|
|
}
|
|
return get8Perm(g, 3);
|
|
}
|
|
// function doMv(idx, m) {
|
|
// return cmv[~~(idx / 6)][m] * 6 + doEdgeMove(idx % 6, m);
|
|
// }
|
|
function init() {
|
|
initCornerMoveTable();
|
|
mathlib.createPrun(cprun, 0, 40320, 12, cmv, 4, 3);
|
|
// mathlib.createPrun([], 0, 40320 * 6, 15, doMv, 4, 3);
|
|
}
|
|
|
|
function search(corner, edge, maxl, lm, sol) {
|
|
if (maxl == 0) {
|
|
return corner + edge == 0;
|
|
}
|
|
if (mathlib.getPruning(cprun, corner) > maxl) return false;
|
|
var h, g, f, i;
|
|
for (i = 0; i < 4; i++) {
|
|
if (i != lm) {
|
|
h = corner;
|
|
g = edge;
|
|
for (f = 0; f < (i < 2 ? 3 : 1); f++) {
|
|
h = cmv[i][h];
|
|
g = doEdgeMove(g, i);
|
|
if (search(h, g, maxl - 1, i, sol)) {
|
|
sol.push(["U", "D", "R2", "F2"][i] + (i < 2 ? " 2'".charAt(f) : ""));
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function generateScramble() {
|
|
init();
|
|
var d = [];
|
|
var a = 0,
|
|
b, c;
|
|
do {
|
|
c = mathlib.rn(40320);
|
|
b = mathlib.rn(6);
|
|
} while (b + c == 0)
|
|
for (a = 0; a < 99; a++) {
|
|
if (search(c, b, a, -1, d)) {
|
|
break;
|
|
}
|
|
}
|
|
return d.reverse().join(" ")
|
|
}
|
|
|
|
return {
|
|
get223scramble: generateScramble,
|
|
}
|
|
//scramble.reg('223', generateScramble);
|
|
})(mathlib.circle, mathlib.get8Perm); |