- tunptr = tunmap;
- for(i=0; i<80; i++) {
- top++;
- bot++;
- tunptr++;
- for(j=1; j<240/2; j++) {
- tun = *tunptr++;
-
- angle = tun & 0xff;
- depth = (tun >> 8) & 0xff;
- tx = ((angle >> 1) + zoffs) & 0x1f;
- ty = ((depth >> 1) + zoffs) & 0x1f;
- pptop = tex[(ty << 5) + tx];
- tx = ((angle >> 1) - zoffs) & 0x1f;
- ppbot = tex[(ty << 5) + tx];
-
- angle = (tun >> 16) & 0xff;
- depth = (tun >> 24) & 0xff;
- tx = ((angle >> 1) + zoffs) & 0x1f;
- ty = ((depth >> 1) + zoffs) & 0x1f;
- pptop |= (uint16_t)tex[(ty << 5) + tx] << 8;
- tx = ((angle >> 1) - zoffs) & 0x1f;
- ppbot |= (uint16_t)tex[(ty << 5) + tx] << 8;
-
- *top++ = pptop;
- *bot++ = ppbot;
+ tunptr = tunmap + tunturn * 9600;
+
+ if(flip) {
+ tunptr += 240/2;
+ for(i=0; i<80; i++) {
+ for(j=0; j<240/2; j++) {
+ tun = *--tunptr;
+
+ angle = TUN_U(tun >> 16);
+ depth = TUN_V(tun >> 16);
+ shade = depth >> 7;
+ tx = ~(angle - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop = TEXEL(tx, ty, shade);
+ tx = (angle + uoffs) & 0x1f;
+ ppbot = TEXEL(tx, ty, shade);
+
+ angle = TUN_U(tun);
+ depth = TUN_V(tun);
+ shade = depth >> 7;
+ tx = ~(angle - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop |= (uint16_t)TEXEL(tx, ty, shade) << 8;
+ tx = (angle + uoffs) & 0x1f;
+ ppbot |= (uint16_t)TEXEL(tx, ty, shade) << 8;
+
+ *top++ = pptop;
+ *bot++ = ppbot;
+ }
+ bot -= 240;
+ tunptr += 240;
+ }
+ } else {
+ for(i=0; i<80; i++) {
+ for(j=0; j<240/2; j++) {
+ tun = *tunptr++;
+
+ angle = TUN_U(tun);
+ depth = TUN_V(tun);
+ shade = depth >> 7;
+ tx = (angle - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop = TEXEL(tx, ty, shade);
+ tx = ~(angle + uoffs) & 0x1f;
+ ppbot = TEXEL(tx, ty, shade);
+
+ angle = TUN_U(tun >> 16);
+ depth = TUN_V(tun >> 16);
+ shade = depth >> 7;
+ tx = (angle - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop |= (uint16_t)TEXEL(tx, ty, shade) << 8;
+ tx = ~(angle + uoffs) & 0x1f;
+ ppbot |= (uint16_t)TEXEL(tx, ty, shade) << 8;
+
+ *top++ = pptop;
+ *bot++ = ppbot;
+ }
+ bot -= 240;