// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Table to merge the coordinates of the UR,UF,UL and UB,DR,DF edges at the beginning of phase2
private void mergeURtoULandUBtoDF(boolean force) {
if (!force && MergeURtoULandUBtoDF != null) return;
MergeURtoULandUBtoDF = new short[336][336];
/* for i, j < 336 the six edges UR,UF,UL,UB,DR,DF are not in the UD-slice and the index is < 20160 */
for (short uRtoUL = 0; uRtoUL < 336; uRtoUL++) {
for (short uBtoDF = 0; uBtoDF < 336; uBtoDF++) {
MergeURtoULandUBtoDF[uRtoUL][uBtoDF] = (short) CubieCube.getURtoDF(uRtoUL, uBtoDF);
}
}
}
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// Move table for the permutation of six U-face and D-face edges in phase2. The positions of the
// DL and DB edges are
// determined by the parity.
// URtoDF < 665280 in phase 1
// URtoDF < 20160 in phase 2
// URtoDF = 0 for solved cube.
private void loadURtoDFMoves(boolean force) {
if (!force && URtoDF_Move != null) return;
URtoDF_Move = new short[N_URtoDF][N_MOVE];
CubieCube a = new CubieCube();
for (short i = 0; i < N_URtoDF; i++) {
a.setURtoDF(i);
for (int j = 0; j < 6; j++) {
for (int k = 0; k < 3; k++) {
a.edgeMultiply(CubieCube.moveCube[j]);
URtoDF_Move[i][3 * j + k] =
(short)
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]);
}
}
}
