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Center3.m
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Center3.m
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//
// Center3.m
// DCTimer
//
// Created by meigen on 15/10/30.
//
//
#import "Center3.h"
#import "Util.h"
/*
0 1
3 2
4 5 0 1 0 1 4 5
7 6 3 2 3 2 7 6
4 5
7 6
*/
@implementation Center3
unsigned short ctmove[35*35*12*2][20];
int pmove[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1};
char ct3prun[35*35*12*2];
int rl2std[] = {0, 9, 14, 23, 27, 28, 41, 42, 46, 55, 60, 69};
int std2rl[70];
extern int Cnk[25][25];
-(id) init {
if (self = [super init]) {
parity = 0;
}
return self;
}
+(void)initCent3 {
for (int i=0; i<12; i++) {
std2rl[rl2std[i]] = i;
}
}
+(void)initMove {
Center3 *c = [[Center3 alloc] init];
for (int i=0; i<35*35*12*2; i++) {
for (int m=0; m<20; m++) {
[c setct:i];
[c move:m];
ctmove[i][m] = [c getct];
}
}
}
+(void)initPrun {
for (int i=1; i<29400; i++) ct3prun[i] = -1;
ct3prun[0] = 0;
int depth = 0;
int done = 1;
while (depth < 10) {
for (int i=0; i<29400; i++) {
if (ct3prun[i] != depth) {
continue;
}
for (int m=0; m<17; m++) {
if (ct3prun[ctmove[i][m]] == -1) {
ct3prun[ctmove[i][m]] = depth + 1;
done++;
}
}
}
depth++;
//NSLog(@"%d %d", depth, done);
}
}
-(void)set:(CenterCube *)c ep:(int)eXc_parity {
int p = (c->ct[0]%3 > c->ct[8]%3 ^ c->ct[8]%3 > c->ct[16]%3 ^ c->ct[0]%3 > c->ct[16]%3) ? 0 : 1;
for (int i=0; i<8; i++) {
ud[i] = (c->ct[i] / 3) ^ 1;
fb[i] = (c->ct[i+8] / 3) ^ 1;
rl[i] = (c->ct[i+16] / 3) ^ 1 ^ p;
}
self->parity = p ^ eXc_parity;
}
-(int)getct {
int idx = 0;
int r = 4;
for (int i=6; i>=0; i--) {
if (ud[i] != ud[7]) {
idx += Cnk[i][r--];
}
}
idx *= 35;
r = 4;
for (int i=6; i>=0; i--) {
if (fb[i] != fb[7]) {
idx += Cnk[i][r--];
}
}
idx *= 12;
int check = fb[7] ^ ud[7];
int idxrl = 0;
r = 4;
for (int i=7; i>=0; i--) {
if (rl[i] != check) {
idxrl += Cnk[i][r--];
}
}
return parity + 2 * (idx + std2rl[idxrl]);
}
-(void)setct:(int)idx {
parity = idx & 1;
idx >>= 1;
int idxrl = rl2std[idx % 12];
idx /= 12;
int r = 4;
for (int i=7; i>=0; i--) {
rl[i] = 0;
if (idxrl >= Cnk[i][r]) {
idxrl -= Cnk[i][r--];
rl[i] = 1;
}
}
int idxfb = idx % 35;
idx /= 35;
r = 4;
fb[7] = 0;
for (int i=6; i>=0; i--) {
if (idxfb >= Cnk[i][r]) {
idxfb -= Cnk[i][r--];
fb[i] = 1;
} else {
fb[i] = 0;
}
}
r = 4;
ud[7] = 0;
for (int i=6; i>=0; i--) {
if (idx >= Cnk[i][r]) {
idx -= Cnk[i][r--];
ud[i] = 1;
} else {
ud[i] = 0;
}
}
}
-(void) move:(int)i {
parity ^= pmove[i];
switch (i) {
case 0: //U
case 1: //U2
case 2: //U'
[Util swap:ud a:0 b:1 c:2 d:3 k:i%3];
break;
case 3: //R2
[Util swap:rl a:0 b:1 c:2 d:3 k:1];
break;
case 4: //F
case 5: //F2
case 6: //F'
[Util swap:fb a:0 b:1 c:2 d:3 k:(i-1)%3];
break;
case 7: //D
case 8: //D2
case 9: //D'
[Util swap:ud a:4 b:5 c:6 d:7 k:(i-1)%3];
break;
case 10: //L2
[Util swap:rl a:4 b:5 c:6 d:7 k:1];
break;
case 11: //B
case 12: //B2
case 13: //B'
[Util swap:fb a:4 b:5 c:6 d:7 k:(i+1)%3];
break;
case 14: //u2
[Util swap:ud a:0 b:1 c:2 d:3 k:1];
[Util swap:rl a:0 b:5 c:4 d:1 k:1];
[Util swap:fb a:0 b:5 c:4 d:1 k:1];
break;
case 15: //r2
[Util swap:rl a:0 b:1 c:2 d:3 k:1];
[Util swap:fb a:1 b:4 c:7 d:2 k:1];
[Util swap:ud a:1 b:6 c:5 d:2 k:1];
break;
case 16: //f2
[Util swap:fb a:0 b:1 c:2 d:3 k:1];
[Util swap:ud a:3 b:2 c:5 d:4 k:1];
[Util swap:rl a:0 b:3 c:6 d:5 k:1];
break;
case 17: //d2
[Util swap:ud a:4 b:5 c:6 d:7 k:1];
[Util swap:rl a:3 b:2 c:7 d:6 k:1];
[Util swap:fb a:3 b:2 c:7 d:6 k:1];
break;
case 18: //l2
[Util swap:rl a:4 b:5 c:6 d:7 k:1];
[Util swap:fb a:0 b:3 c:6 d:5 k:1];
[Util swap:ud a:0 b:3 c:4 d:7 k:1];
break;
case 19: //b2
[Util swap:fb a:4 b:5 c:6 d:7 k:1];
[Util swap:ud a:0 b:7 c:6 d:1 k:1];
[Util swap:rl a:1 b:4 c:7 d:2 k:1];
break;
}
}
@end