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#define TRANS_C
#include "trans.h"
/* Local functions ***********************************************************/
/* Tables and other data *****************************************************/
static Cube mirror_cube = {
.ep = { [UF] = UF, [UL] = UR, [UB] = UB, [UR] = UL,
[DF] = DF, [DL] = DR, [DB] = DB, [DR] = DL,
[FR] = FL, [FL] = FR, [BL] = BR, [BR] = BL },
.cp = { [UFR] = UFL, [UFL] = UFR, [UBL] = UBR, [UBR] = UBL,
[DFR] = DFL, [DFL] = DFR, [DBL] = DBR, [DBR] = DBL },
.xp = { [U_center] = U_center, [D_center] = D_center,
[R_center] = L_center, [L_center] = R_center,
[F_center] = F_center, [B_center] = B_center }
};
static char rotation_alg_string[100][NROTATIONS] = {
[uf] = "", [ur] = "y", [ub] = "y2", [ul] = "y3",
[df] = "z2", [dr] = "y z2", [db] = "x2", [dl] = "y3 z2",
[rf] = "z3", [rd] = "z3 y", [rb] = "z3 y2", [ru] = "z3 y3",
[lf] = "z", [ld] = "z y3", [lb] = "z y2", [lu] = "z y",
[fu] = "x y2", [fr] = "x y", [fd] = "x", [fl] = "x y3",
[bu] = "x3", [br] = "x3 y", [bd] = "x3 y2", [bl] = "x3 y3",
};
Alg *rotation_alg_arr[NROTATIONS];
Move moves_ttable[NTRANS][NMOVES];
Trans trans_ttable[NTRANS][NTRANS];
Trans trans_itable[NTRANS];
/* Public functions **********************************************************/
void
apply_trans(Trans t, Cube *cube)
{
Cube aux;
Alg *inv;
int i;
inv = inverse_alg(rotation_alg(t % NROTATIONS));
copy_cube(cube, &aux);
make_solved(cube);
if (t >= NROTATIONS)
compose(&mirror_cube, cube);
apply_alg(inv, cube);
compose(&aux, cube);
apply_alg(rotation_alg(t % NROTATIONS), cube);
if (t >= NROTATIONS) {
compose(&mirror_cube, cube);
for (i = 0; i < 8; i++)
cube->co[i] = (3 - cube->co[i]) % 3;
}
free_alg(inv);
}
/*
Trans
inverse_trans(Trans t)
{
static Trans inverse_trans_aux[NTRANS] = {
[uf] = uf, [ur] = ul, [ul] = ur, [ub] = ub,
[df] = df, [dr] = dr, [dl] = dl, [db] = db,
[rf] = lf, [rd] = bl, [rb] = rb, [ru] = fr,
[lf] = rf, [ld] = br, [lb] = lb, [lu] = fl,
[fu] = fu, [fr] = ru, [fd] = bu, [fl] = lu,
[bu] = fd, [br] = ld, [bd] = bd, [bl] = rd,
[uf_mirror] = uf_mirror, [ur_mirror] = ur_mirror,
[ul_mirror] = ul_mirror, [ub_mirror] = ub_mirror,
[df_mirror] = df_mirror, [dr_mirror] = dl_mirror,
[dl_mirror] = dr_mirror, [db_mirror] = db_mirror,
[rf_mirror] = rf_mirror, [rd_mirror] = br_mirror,
[rb_mirror] = lb_mirror, [ru_mirror] = fl_mirror,
[lf_mirror] = lf_mirror, [ld_mirror] = bl_mirror,
[lb_mirror] = rb_mirror, [lu_mirror] = fr_mirror,
[fu_mirror] = fu_mirror, [fr_mirror] = lu_mirror,
[fd_mirror] = bu_mirror, [fl_mirror] = ru_mirror,
[bu_mirror] = fd_mirror, [br_mirror] = rd_mirror,
[bd_mirror] = bd_mirror, [bl_mirror] = ld_mirror
};
return inverse_trans_aux[t];
}
*/
Trans
inverse_trans(Trans t)
{
return trans_itable[t];
}
Alg *
rotation_alg(Trans i)
{
return rotation_alg_arr[i % NROTATIONS];
}
void
transform_alg(Trans t, Alg *alg)
{
int i;
for (i = 0; i < alg->len; i++)
alg->move[i] = transform_move(t, alg->move[i]);
}
Move
transform_move(Trans t, Move m)
{
return moves_ttable[t][m];
}
Trans
transform_trans(Trans t, Trans m)
{
return trans_ttable[t][m];
}
void
init_trans() {
static bool initialized = false;
if (initialized)
return;
initialized = true;
int i;
Alg *nonsym_alg, *nonsym_inv;
Cube aux, cube;
Move mi, move;
Trans t, u, v;
init_moves();
for (i = 0; i < NROTATIONS; i++)
rotation_alg_arr[i] = new_alg(rotation_alg_string[i]);
for (t = 0; t < NTRANS; t++) {
for (mi = 0; mi < NMOVES; mi++) {
make_solved(&aux);
apply_move(mi, &aux);
apply_trans(t, &aux);
for (move = 0; move < NMOVES; move++) {
copy_cube(&aux, &cube);
apply_move(inverse_move(move), &cube);
if (is_solved(&cube)) {
moves_ttable[t][mi] = move;
break;
}
}
}
}
nonsym_alg = new_alg("R' U' F");
nonsym_inv = inverse_alg(nonsym_alg);
for (t = 0; t < NTRANS; t++) {
for (u = 0; u < NTRANS; u++) {
make_solved(&aux);
apply_alg(nonsym_alg, &aux);
apply_trans(u, &aux);
apply_trans(t, &aux);
for (v = 0; v < NTRANS; v++) {
copy_cube(&aux, &cube);
apply_trans(v, &cube);
apply_alg(nonsym_inv, &cube);
if (is_solved(&cube)) {
/* This is the inverse of the correct
value, it will be inverted later */
trans_ttable[t][u] = v;
if (v == uf)
trans_itable[t] = u;
break;
}
}
}
}
for (t = 0; t < NTRANS; t++)
for (u = 0; u < NTRANS; u++)
trans_ttable[t][u] = trans_itable[trans_ttable[t][u]];
free_alg(nonsym_alg);
free_alg(nonsym_inv);
}
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