- for(i=0; i<160; i++) {
- startx = tunx;
- starty = tuny;
- for(j=0; j<240/2; j++) {
- tx = (tunx >> 8) & 0xff;
- ty = (tuny >> 8) & 0xff;
- tun = tmap[(ty << 8) + tx];
-
- tunx += tunmat[0];
- tuny += tunmat[2];
-
- angle = tun & 0xff;
- depth = (tun >> 8) & 0xff;
- tx = ((angle >> 1) - uoffs) & 0x1f;
- ty = ((depth >> 1) + zoffs) & 0x1f;
- pptop = tex[(ty << 5) + tx];
-
- tx = (tunx >> 8) & 0xff;
- ty = (tuny >> 8) & 0xff;
- tun = tmap[(ty << 8) + tx];
-
- tunx += tunmat[0];
- tuny += tunmat[2];
-
- angle = tun & 0xff;
- depth = (tun >> 8) & 0xff;
- tx = ((angle >> 1) - uoffs) & 0x1f;
- ty = ((depth >> 1) + zoffs) & 0x1f;
- pptop |= (uint16_t)tex[(ty << 5) + tx] << 8;
-
- *top++ = pptop;
+ bot = vram[backbuf] + 159 * 240 / 2;
+ tunptr = tunmap + tunturn * 9600;
+
+ if(flip) {
+ tunptr += 240/2;
+ for(i=0; i<80; i++) {
+ for(j=0; j<240/2; j++) {
+ tun = *--tunptr;
+ tun = (tun >> 16) | (tun << 16);
+
+ angle = tun & 0xff;
+ depth = (tun >> 8) & 0xff;
+ tx = ~((angle >> 1) - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop = tex[(ty << 5) + tx];
+ tx = ((angle >> 1) + uoffs) & 0x1f;
+ ppbot = tex[(ty << 5) + tx];
+
+ angle = (tun >> 16) & 0xff;
+ depth = (tun >> 24) & 0xff;
+ tx = ~((angle >> 1) - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop |= (uint16_t)tex[(ty << 5) + tx] << 8;
+ tx = ((angle >> 1) + uoffs) & 0x1f;
+ ppbot |= (uint16_t)tex[(ty << 5) + tx] << 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 & 0xff;
+ depth = (tun >> 8) & 0xff;
+ tx = ((angle >> 1) - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop = tex[(ty << 5) + tx];
+ tx = ~((angle >> 1) + uoffs) & 0x1f;
+ ppbot = tex[(ty << 5) + tx];
+
+ angle = (tun >> 16) & 0xff;
+ depth = (tun >> 24) & 0xff;
+ tx = ((angle >> 1) - uoffs) & 0x1f;
+ ty = ((depth >> 1) + zoffs) & 0x1f;
+ pptop |= (uint16_t)tex[(ty << 5) + tx] << 8;
+ tx = ~((angle >> 1) + uoffs) & 0x1f;
+ ppbot |= (uint16_t)tex[(ty << 5) + tx] << 8;
+
+ *top++ = pptop;
+ *bot++ = ppbot;
+ }
+ bot -= 240;