ucode08.h

   1 /*
   2 * Glide64 - Glide video plugin for Nintendo 64 emulators.
   3 * Copyright (c) 2002  Dave2001
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; either version 2 of the License, or
   8 * any later version.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 */
  19
  20 //****************************************************************
  21 //
  22 // Glide64 - Glide Plugin for Nintendo 64 emulators (tested mostly with Project64)
  23 // Project started on December 29th, 2001
  24 //
  25 // To modify Glide64:
  26 // * Write your name and (optional)email, commented by your work, so I know who did it, and so that you can find which parts you modified when it comes time to send it to me.
  27 // * Do NOT send me the whole project or file that you modified.  Take out your modified code sections, and tell me where to put them.  If people sent the whole thing, I would have many different versions, but no idea how to combine them all.
  28 //
  29 // Official Glide64 development channel: #Glide64 on EFnet
  30 //
  31 // Original author: Dave2001 (Dave2999@hotmail.com)
  32 // Other authors: Gonetz, Gugaman
  33 //
  34 //****************************************************************
  35 //
  36 // January 2004 Created by Gonetz (Gonetz@ngs.ru)
  37 //****************************************************************
  38
  39 DWORD uc8_normale_addr = 0;
  40 float uc8_coord_mod[16];
  41
  42 static void uc8_vertex ()
  43 {
  44   if (rdp.update & UPDATE_MULT_MAT)
  45   {
  46     rdp.update ^= UPDATE_MULT_MAT;
  47         MulMatrices(rdp.model, rdp.proj, rdp.combined);
  48   }
  49
  50   DWORD addr = segoffset(rdp.cmd1);
  51   int v0, i, n;
  52   float x, y, z;
  53
  54   rdp.vn = n = (rdp.cmd0 >> 12) & 0xFF;
  55   rdp.v0 = v0 = ((rdp.cmd0 >> 1) & 0x7F) - n;
  56
  57         FRDP ("uc8:vertex n: %d, v0: %d, from: %08lx\n", n, v0, addr);
  58
  59   if (v0 < 0)
  60   {
  61     RDP_E ("** ERROR: uc2:vertex v0 < 0\n");
  62     RDP ("** ERROR: uc2:vertex v0 < 0\n");
  63     return;
  64   }
  65         //*
  66   // This is special, not handled in update()
  67   if (rdp.update & UPDATE_LIGHTS)
  68   {
  69     rdp.update ^= UPDATE_LIGHTS;
  70
  71     // Calculate light vectors
  72     for (DWORD l=0; l<rdp.num_lights; l++)
  73     {
  74                         InverseTransformVector(&rdp.light[l].dir_x, rdp.light_vector[l], rdp.model);
  75       NormalizeVector (rdp.light_vector[l]);
  76 #ifdef EXTREME_LOGGING
  77                         FRDP("light_vector[%d] x: %f, y: %f, z: %f\n", l, rdp.light_vector[l][0], rdp.light_vector[l][1], rdp.light_vector[l][2]);
  78 #endif
  79     }
  80   }
  81 //*/
  82   for (i=0; i < (n<<4); i+=16)
  83   {
  84     VERTEX *v = &rdp.vtx[v0 + (i>>4)];
  85     x   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 0)^1];
  86     y   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 1)^1];
  87     z   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 2)^1];
  88     v->flags  = ((WORD*)gfx.RDRAM)[(((addr+i) >> 1) + 3)^1];
  89     v->ou   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 4)^1] * rdp.tiles[rdp.cur_tile].s_scale;
  90     v->ov   = (float)((short*)gfx.RDRAM)[(((addr+i) >> 1) + 5)^1] * rdp.tiles[rdp.cur_tile].t_scale;
  91     v->a    = ((BYTE*)gfx.RDRAM)[(addr+i + 15)^3];
  92
  93 #ifdef EXTREME_LOGGING
  94                 FRDP ("before v%d - x: %f, y: %f, z: %f\n", i>>4, x, y, z);
  95 #endif
  96     v->x = x*rdp.combined[0][0] + y*rdp.combined[1][0] + z*rdp.combined[2][0] + rdp.combined[3][0];
  97     v->y = x*rdp.combined[0][1] + y*rdp.combined[1][1] + z*rdp.combined[2][1] + rdp.combined[3][1];
  98     v->z = x*rdp.combined[0][2] + y*rdp.combined[1][2] + z*rdp.combined[2][2] + rdp.combined[3][2];
  99     v->w = x*rdp.combined[0][3] + y*rdp.combined[1][3] + z*rdp.combined[2][3] + rdp.combined[3][3];
 100
 101 #ifdef EXTREME_LOGGING
 102                 FRDP ("v%d - x: %f, y: %f, z: %f, w: %f, u: %f, v: %f, flags: %d\n", i>>4, v->x, v->y, v->z, v->w, v->ou, v->ov, v->flags);
 103 #endif
 104
 105     v->oow = 1.0f / v->w;
 106     v->x_w = v->x * v->oow;
 107     v->y_w = v->y * v->oow;
 108     v->z_w = v->z * v->oow;
 109
 110     v->uv_calculated = 0xFFFFFFFF;
 111     v->screen_translated = 0;
 112         v->shade_mods_allowed = 1;
 113
 114     v->scr_off = 0;
 115     if (v->x < -v->w) v->scr_off |= 1;
 116     if (v->x > v->w) v->scr_off |= 2;
 117     if (v->y < -v->w) v->scr_off |= 4;
 118     if (v->y > v->w) v->scr_off |= 8;
 119     if (v->w < 0.1f) v->scr_off |= 16;
 120 ///*
 121     v->r = ((BYTE*)gfx.RDRAM)[(addr+i + 12)^3];
 122     v->g = ((BYTE*)gfx.RDRAM)[(addr+i + 13)^3];
 123     v->b = ((BYTE*)gfx.RDRAM)[(addr+i + 14)^3];
 124 #ifdef EXTREME_LOGGING
 125                 FRDP ("r: %02lx, g: %02lx, b: %02lx, a: %02lx\n", v->r, v->g, v->b, v->a);
 126 #endif
 127
 128                 if ((rdp.geom_mode & 0x00020000))
 129                 {
 130                         DWORD shift = v0 << 1;
 131                         v->vec[0] = ((char*)gfx.RDRAM)[(uc8_normale_addr + (i>>3) + shift + 0)^3];
 132                         v->vec[1] = ((char*)gfx.RDRAM)[(uc8_normale_addr + (i>>3) + shift + 1)^3];
 133                         v->vec[2] = (char)(v->flags&0xff);
 134
 135                         if (rdp.geom_mode & 0x80000)
 136                         {
 137                                 calc_linear (v);
 138 #ifdef EXTREME_LOGGING
 139                                 FRDP ("calc linear: v%d - u: %f, v: %f\n", i>>4, v->ou, v->ov);
 140 #endif
 141                         }
 142                         else if (rdp.geom_mode & 0x40000)
 143                         {
 144                                 calc_sphere (v);
 145 #ifdef EXTREME_LOGGING
 146                                 FRDP ("calc sphere: v%d - u: %f, v: %f\n", i>>4, v->ou, v->ov);
 147 #endif
 148                         }
 149                         //     FRDP("calc light. r: 0x%02lx, g: 0x%02lx, b: 0x%02lx, nx: %.3f, ny: %.3f, nz: %.3f\n", v->r, v->g, v->b, v->vec[0], v->vec[1], v->vec[2]);
 150                         FRDP("v[%d] calc light. r: 0x%02lx, g: 0x%02lx, b: 0x%02lx\n", i>>4, v->r, v->g, v->b);
 151                         float color[3] = {rdp.light[rdp.num_lights].r, rdp.light[rdp.num_lights].g, rdp.light[rdp.num_lights].b};
 152                         FRDP("ambient light. r: %f, g: %f, b: %f\n", color[0], color[1], color[2]);
 153                         float light_intensity = 0.0f;
 154                         DWORD l;
 155                         if (rdp.geom_mode & 0x00400000)
 156                         {
 157                                 NormalizeVector (v->vec);
 158                                 for (l = 0; l < rdp.num_lights-1; l++)
 159         {
 160           if (!rdp.light[l].nonblack)
 161             continue;
 162           light_intensity = DotProduct (rdp.light_vector[l], v->vec);
 163           FRDP("light %d, intensity : %f\n", l, light_intensity);
 164           if (light_intensity < 0.0f)
 165             continue;
 166           //*
 167           if (rdp.light[l].ca > 0.0f)
 168           {
 169             float vx = (v->x + uc8_coord_mod[8])*uc8_coord_mod[12] - rdp.light[l].x;
 170             float vy = (v->y + uc8_coord_mod[9])*uc8_coord_mod[13] - rdp.light[l].y;
 171             float vz = (v->z + uc8_coord_mod[10])*uc8_coord_mod[14] - rdp.light[l].z;
 172             float vw = (v->w + uc8_coord_mod[11])*uc8_coord_mod[15] - rdp.light[l].w;
 173             float len = (vx*vx+vy*vy+vz*vz+vw*vw)/65536.0f;
 174             float p_i = rdp.light[l].ca / len;
 175             if (p_i > 1.0f) p_i = 1.0f;
 176             light_intensity *= p_i;
 177             FRDP("light %d, len: %f, p_intensity : %f\n", l, len, p_i);
 178           }
 179 //*/
 180           color[0] += rdp.light[l].r * light_intensity;
 181           color[1] += rdp.light[l].g * light_intensity;
 182           color[2] += rdp.light[l].b * light_intensity;
 183           FRDP("light %d r: %f, g: %f, b: %f\n", l, color[0], color[1], color[2]);
 184         }
 185         light_intensity = DotProduct (rdp.light_vector[l], v->vec);
 186         FRDP("light %d, intensity : %f\n", l, light_intensity);
 187         if (light_intensity > 0.0f)
 188         {
 189           color[0] += rdp.light[l].r * light_intensity;
 190           color[1] += rdp.light[l].g * light_intensity;
 191           color[2] += rdp.light[l].b * light_intensity;
 192         }
 193         FRDP("light %d r: %f, g: %f, b: %f\n", l, color[0], color[1], color[2]);
 194       }
 195                         else
 196                         {
 197                                 for (l = 0; l < rdp.num_lights; l++)
 198                                 {
 199                                         if (rdp.light[l].nonblack && rdp.light[l].nonzero)
 200                                         {
 201                                                 float vx = (v->x + uc8_coord_mod[8])*uc8_coord_mod[12] - rdp.light[l].x;
 202                                                 float vy = (v->y + uc8_coord_mod[9])*uc8_coord_mod[13] - rdp.light[l].y;
 203                                                 float vz = (v->z + uc8_coord_mod[10])*uc8_coord_mod[14] - rdp.light[l].z;
 204                                                 float vw = (v->w + uc8_coord_mod[11])*uc8_coord_mod[15] - rdp.light[l].w;
 205                                                 float len = (vx*vx+vy*vy+vz*vz+vw*vw)/65536.0f;
 206                                                 light_intensity = rdp.light[l].ca / len;
 207                                                 if (light_intensity > 1.0f) light_intensity = 1.0f;
 208                                                 FRDP("light %d, p_intensity : %f\n", l, light_intensity);
 209                                                 color[0] += rdp.light[l].r * light_intensity;
 210                                                 color[1] += rdp.light[l].g * light_intensity;
 211                                                 color[2] += rdp.light[l].b * light_intensity;
 212                                                 //FRDP("light %d r: %f, g: %f, b: %f\n", l, color[0], color[1], color[2]);
 213                                         }
 214                                 }
 215                         }
 216                         if (color[0] > 1.0f) color[0] = 1.0f;
 217                         if (color[1] > 1.0f) color[1] = 1.0f;
 218                         if (color[2] > 1.0f) color[2] = 1.0f;
 219                         v->r = (BYTE)(((float)v->r)*color[0]);
 220                         v->g = (BYTE)(((float)v->g)*color[1]);
 221                         v->b = (BYTE)(((float)v->b)*color[2]);
 222 #ifdef EXTREME_LOGGING
 223                 FRDP("color after light: r: 0x%02lx, g: 0x%02lx, b: 0x%02lx\n", v->r, v->g, v->b);
 224 #endif
 225     }
 226   }
 227 }
 228
 229 static void uc8_moveword ()
 230 {
 231   BYTE index = (BYTE)((rdp.cmd0 >> 16) & 0xFF);
 232   WORD offset = (WORD)(rdp.cmd0 & 0xFFFF);
 233   DWORD data = rdp.cmd1;
 234
 235   FRDP ("uc8:moveword ");
 236
 237   switch (index)
 238   {
 239     // NOTE: right now it's assuming that it sets the integer part first.  This could
 240     //  be easily fixed, but only if i had something to test with.
 241
 242   case 0x02:
 243     rdp.num_lights = (data / 48);
 244     rdp.update |= UPDATE_LIGHTS;
 245     FRDP ("numlights: %d\n", rdp.num_lights);
 246     break;
 247
 248   case 0x04:
 249     FRDP ("mw_clip %08lx, %08lx\n", rdp.cmd0, rdp.cmd1);
 250     break;
 251
 252   case 0x06:  // moveword SEGMENT
 253     {
 254       FRDP ("SEGMENT %08lx -> seg%d\n", data, offset >> 2);
 255       rdp.segment[(offset >> 2) & 0xF] = data;
 256     }
 257     break;
 258
 259   case 0x08:
 260     {
 261                         rdp.fog_multiplier = (short)(rdp.cmd1 >> 16);
 262                         rdp.fog_offset = (short)(rdp.cmd1 & 0x0000FFFF);
 263                         FRDP ("fog: multiplier: %f, offset: %f\n", rdp.fog_multiplier, rdp.fog_offset);
 264     }
 265     break;
 266
 267   case 0x0c:
 268     RDP_E ("uc8:moveword forcemtx - IGNORED\n");
 269     RDP ("forcemtx - IGNORED\n");
 270     break;
 271
 272   case 0x0e:
 273     RDP ("perspnorm - IGNORED\n");
 274     break;
 275
 276         case 0x10:  // moveword coord mod
 277     {
 278       BYTE n = offset >> 2;
 279
 280                         FRDP ("coord mod:%d, %08lx\n", n, data);
 281                         if (rdp.cmd0&8)
 282                                 return;
 283                         DWORD idx = (rdp.cmd0>>1)&3;
 284                         DWORD pos = rdp.cmd0&0x30;
 285                         if (pos == 0)
 286                         {
 287                                 uc8_coord_mod[0+idx] = (short)(rdp.cmd1>>16);
 288                                 uc8_coord_mod[1+idx] = (short)(rdp.cmd1&0xffff);
 289                         }
 290                         else if (pos == 0x10)
 291                         {
 292                                 uc8_coord_mod[4+idx] = (rdp.cmd1>>16)/65536.0f;
 293                                 uc8_coord_mod[5+idx] = (rdp.cmd1&0xffff)/65536.0f;
 294                                 uc8_coord_mod[12+idx] = uc8_coord_mod[0+idx] + uc8_coord_mod[4+idx];
 295                                 uc8_coord_mod[13+idx] = uc8_coord_mod[1+idx] + uc8_coord_mod[5+idx];
 296
 297                         }
 298                         else if (pos == 0x20)
 299                         {
 300                                 uc8_coord_mod[8+idx] = (short)(rdp.cmd1>>16);
 301                                 uc8_coord_mod[9+idx] = (short)(rdp.cmd1&0xffff);
 302 #ifdef EXTREME_LOGGING
 303                                 if (idx)
 304                                 {
 305                                         for (int k = 8; k < 16; k++)
 306                                         {
 307                                                 FRDP("coord_mod[%d]=%f\n", k, uc8_coord_mod[k]);
 308                                         }
 309                                 }
 310 #endif
 311                         }
 312
 313     }
 314     break;
 315
 316   default:
 317     FRDP_E("uc8:moveword unknown (index: 0x%08lx, offset 0x%08lx)\n", index, offset);
 318     FRDP ("unknown (index: 0x%08lx, offset 0x%08lx)\n", index, offset);
 319   }
 320 }
 321
 322 static void uc8_movemem ()
 323 {
 324   int idx = rdp.cmd0 & 0xFF;
 325   DWORD addr = segoffset(rdp.cmd1);
 326   int ofs = (rdp.cmd0 >> 5) & 0x3FFF;
 327
 328   FRDP ("uc8:movemem ofs:%d ", ofs);
 329
 330   switch (idx)
 331   {
 332   case 8:   // VIEWPORT
 333     {
 334       DWORD a = addr >> 1;
 335       short scale_x = ((short*)gfx.RDRAM)[(a+0)^1] >> 2;
 336       short scale_y = ((short*)gfx.RDRAM)[(a+1)^1] >> 2;
 337       short scale_z = ((short*)gfx.RDRAM)[(a+2)^1];
 338       short trans_x = ((short*)gfx.RDRAM)[(a+4)^1] >> 2;
 339       short trans_y = ((short*)gfx.RDRAM)[(a+5)^1] >> 2;
 340       short trans_z = ((short*)gfx.RDRAM)[(a+6)^1];
 341       rdp.view_scale[0] = scale_x * rdp.scale_x;
 342       rdp.view_scale[1] = -scale_y * rdp.scale_y;
 343                         rdp.view_scale[2] = 32.0f * scale_z;
 344       rdp.view_trans[0] = trans_x * rdp.scale_x;
 345       rdp.view_trans[1] = trans_y * rdp.scale_y;
 346                         rdp.view_trans[2] = 32.0f * trans_z;
 347
 348       rdp.update |= UPDATE_VIEWPORT;
 349
 350       FRDP ("viewport scale(%d, %d), trans(%d, %d), from:%08lx\n", scale_x, scale_y,
 351         trans_x, trans_y, a);
 352     }
 353     break;
 354
 355   case 10:  // LIGHT
 356     {
 357                         int n = (ofs / 48);
 358             if (n < 2)
 359             {
 360               char dir_x = ((char*)gfx.RDRAM)[(addr+8)^3];
 361               rdp.lookat[n][0] = (float)(dir_x) / 127.0f;
 362               char dir_y = ((char*)gfx.RDRAM)[(addr+9)^3];
 363               rdp.lookat[n][1] = (float)(dir_y) / 127.0f;
 364               char dir_z = ((char*)gfx.RDRAM)[(addr+10)^3];
 365               rdp.lookat[n][2] = (float)(dir_z) / 127.0f;
 366               rdp.use_lookat = TRUE;
 367               if (n == 1)
 368               {
 369                  if (!dir_x && !dir_y)
 370                    rdp.use_lookat = FALSE;
 371               }
 372               FRDP("lookat_%d (%f, %f, %f)\n", n, rdp.lookat[n][0], rdp.lookat[n][1], rdp.lookat[n][2]);
 373               return;
 374             }
 375             n -= 2;
 376                         BYTE col = gfx.RDRAM[(addr+0)^3];
 377                         rdp.light[n].r = (float)col / 255.0f;
 378                         rdp.light[n].nonblack = col;
 379                         col = gfx.RDRAM[(addr+1)^3];
 380                         rdp.light[n].g = (float)col / 255.0f;
 381                         rdp.light[n].nonblack += col;
 382                         col = gfx.RDRAM[(addr+2)^3];
 383                         rdp.light[n].b = (float)col / 255.0f;
 384                         rdp.light[n].nonblack += col;
 385       rdp.light[n].a = 1.0f;
 386       rdp.light[n].dir_x = (float)(((char*)gfx.RDRAM)[(addr+8)^3]) / 127.0f;
 387       rdp.light[n].dir_y = (float)(((char*)gfx.RDRAM)[(addr+9)^3]) / 127.0f;
 388       rdp.light[n].dir_z = (float)(((char*)gfx.RDRAM)[(addr+10)^3]) / 127.0f;
 389                         // **
 390                         DWORD a = addr >> 1;
 391                         //FIXME: Why unused?
 392                         //short pos = ((short*)gfx.RDRAM)[(a+16)^1];
 393                         rdp.light[n].x = (float)(((short*)gfx.RDRAM)[(a+16)^1]);
 394                         rdp.light[n].y = (float)(((short*)gfx.RDRAM)[(a+17)^1]);
 395                         rdp.light[n].z = (float)(((short*)gfx.RDRAM)[(a+18)^1]);
 396                         rdp.light[n].w = (float)(((short*)gfx.RDRAM)[(a+19)^1]);
 397                         rdp.light[n].nonzero = gfx.RDRAM[(addr+12)^3];
 398                         rdp.light[n].ca = (float)rdp.light[n].nonzero / 16.0f;
 399                         //                      rdp.light[n].la = rdp.light[n].ca * 1.0f;
 400                         //#ifdef EXTREME_LOGGING
 401                         FRDP ("light: n: %d, pos: x: %f, y: %f, z: %f, w: %f, ca: %f\n",
 402                                 n, rdp.light[n].x, rdp.light[n].y, rdp.light[n].z, rdp.light[n].w, rdp.light[n].ca);
 403                         //#endif
 404                         FRDP ("light: n: %d, r: %f, g: %f, b: %f. dir: x: %.3f, y: %.3f, z: %.3f\n",
 405         n, rdp.light[n].r, rdp.light[n].g, rdp.light[n].b,
 406         rdp.light[n].dir_x, rdp.light[n].dir_y, rdp.light[n].dir_z);
 407 #ifdef EXTREME_LOGGING
 408                         for (int t=0; t < 24; t++)
 409                         {
 410                                 FRDP ("light[%d] = 0x%04lx \n", t, ((WORD*)gfx.RDRAM)[(a+t)^1]);
 411                         }
 412 #endif
 413     }
 414     break;
 415
 416         case 14: //Normales
 417     {
 418                         uc8_normale_addr = segoffset(rdp.cmd1);
 419                         FRDP ("Normale - addr: %08lx\n", uc8_normale_addr);
 420 #ifdef EXTREME_LOGGING
 421                         for (int i = 0; i < 32; i++)
 422                         {
 423                                 char x = ((char*)gfx.RDRAM)[uc8_normale_addr + ((i<<1) + 0)^3];
 424                                 char y = ((char*)gfx.RDRAM)[uc8_normale_addr + ((i<<1) + 1)^3];
 425                                 FRDP("#%d x = %d, y = %d\n", i, x, y);
 426                         }
 427                         DWORD a = uc8_normale_addr >> 1;
 428                         for (i = 0; i < 32; i++)
 429                         {
 430                                 FRDP ("n[%d] = 0x%04lx \n", i, ((WORD*)gfx.RDRAM)[(a+i)^1]);
 431                         }
 432 #endif
 433     }
 434     break;
 435
 436   default:
 437                 FRDP ("uc8:movemem unknown (%d)\n", idx);
 438   }
 439 }
 440
 441
 442 static void uc8_tri4() //by Gugaman Apr 19 2002
 443 {
 444     if (rdp.skip_drawing)
 445     {
 446       RDP("uc8:tri4. skipped\n");
 447       return;
 448     }
 449
 450         FRDP("uc8:tri4 (#%d - #%d), %d-%d-%d, %d-%d-%d, %d-%d-%d, %d-%d-%d\n",
 451                 rdp.tri_n,
 452                 rdp.tri_n+3,
 453                 ((rdp.cmd0 >> 23) & 0x1F),
 454                 ((rdp.cmd0 >> 18) & 0x1F),
 455                 ((((rdp.cmd0 >> 15) & 0x7) << 2) | ((rdp.cmd1 >> 30) &0x3)),
 456                 ((rdp.cmd0 >> 10) & 0x1F),
 457                 ((rdp.cmd0 >> 5) & 0x1F),
 458                 ((rdp.cmd0 >> 0) & 0x1F),
 459                 ((rdp.cmd1 >> 25) & 0x1F),
 460                 ((rdp.cmd1 >> 20) & 0x1F),
 461                 ((rdp.cmd1 >> 15) & 0x1F),
 462                 ((rdp.cmd1 >> 10) & 0x1F),
 463                 ((rdp.cmd1 >> 5) & 0x1F),
 464                 ((rdp.cmd1 >> 0) & 0x1F));
 465
 466         VERTEX *v[12] = {
 467                         &rdp.vtx[(rdp.cmd0 >> 23) & 0x1F],
 468                         &rdp.vtx[(rdp.cmd0 >> 18) & 0x1F],
 469                         &rdp.vtx[((((rdp.cmd0 >> 15) & 0x7) << 2) | ((rdp.cmd1 >> 30) &0x3))],
 470                         &rdp.vtx[(rdp.cmd0 >> 10) & 0x1F],
 471                         &rdp.vtx[(rdp.cmd0 >> 5) & 0x1F],
 472                         &rdp.vtx[(rdp.cmd0 >> 0) & 0x1F],
 473                         &rdp.vtx[(rdp.cmd1 >> 25) & 0x1F],
 474                         &rdp.vtx[(rdp.cmd1 >> 20) & 0x1F],
 475                         &rdp.vtx[(rdp.cmd1 >> 15) & 0x1F],
 476                         &rdp.vtx[(rdp.cmd1 >> 10) & 0x1F],
 477                         &rdp.vtx[(rdp.cmd1 >> 5) & 0x1F],
 478                         &rdp.vtx[(rdp.cmd1 >> 0) & 0x1F]
 479         };
 480
 481   BOOL updated = 0;
 482
 483   if (cull_tri(v))
 484     rdp.tri_n ++;
 485   else
 486   {
 487     updated = 1;
 488     update ();
 489
 490     DrawTri (v);
 491     rdp.tri_n ++;
 492   }
 493
 494   if (cull_tri(v+3))
 495     rdp.tri_n ++;
 496   else
 497   {
 498     if (!updated)
 499     {
 500       updated = 1;
 501       update ();
 502     }
 503
 504     DrawTri (v+3);
 505     rdp.tri_n ++;
 506   }
 507
 508   if (cull_tri(v+6))
 509     rdp.tri_n ++;
 510   else
 511   {
 512     if (!updated)
 513     {
 514       updated = 1;
 515       update ();
 516     }
 517
 518     DrawTri (v+6);
 519     rdp.tri_n ++;
 520   }
 521
 522   if (cull_tri(v+9))
 523     rdp.tri_n ++;
 524   else
 525   {
 526     if (!updated)
 527     {
 528       updated = 1;
 529       update ();
 530     }
 531
 532     DrawTri (v+9);
 533     rdp.tri_n ++;
 534   }
 535 }