r_light.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the 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 // r_light.c
  21
  22 #include "quakedef.h"
  23
  24 cvar_t r_lightmodels = {"r_lightmodels", "1"};
  25
  26 void r_light_start()
  27 {
  28 }
  29
  30 void r_light_shutdown()
  31 {
  32 }
  33
  34 void R_Light_Init()
  35 {
  36         Cvar_RegisterVariable(&r_lightmodels);
  37         R_RegisterModule("R_Light", r_light_start, r_light_shutdown);
  38 }
  39
  40 int     r_dlightframecount;
  41
  42 /*
  43 ==================
  44 R_AnimateLight
  45 ==================
  46 */
  47 void R_AnimateLight (void)
  48 {
  49         int                     i,j,k;
  50
  51 //
  52 // light animations
  53 // 'm' is normal light, 'a' is no light, 'z' is double bright
  54         i = (int)(cl.time*10);
  55         for (j=0 ; j<MAX_LIGHTSTYLES ; j++)
  56         {
  57                 if (!cl_lightstyle[j].length)
  58                 {
  59                         d_lightstylevalue[j] = 256;
  60                         continue;
  61                 }
  62                 k = i % cl_lightstyle[j].length;
  63                 k = cl_lightstyle[j].map[k] - 'a';
  64                 k = k*22;
  65                 d_lightstylevalue[j] = k;
  66         }
  67 }
  68
  69 /*
  70 =============================================================================
  71
  72 DYNAMIC LIGHTS
  73
  74 =============================================================================
  75 */
  76
  77 /*
  78 =============
  79 R_MarkLights
  80 =============
  81 */
  82 void R_OldMarkLights (vec3_t lightorigin, dlight_t *light, int bit, int bitindex, mnode_t *node)
  83 {
  84         float           dist;
  85         msurface_t      *surf;
  86         int                     i;
  87
  88 loc0:
  89         if (node->contents < 0)
  90                 return;
  91
  92         dist = PlaneDiff(lightorigin, node->plane);
  93
  94         if (dist > light->radius)
  95         {
  96                 if (node->children[0]->contents >= 0) // LordHavoc: save some time by not pushing another stack frame
  97                 {
  98                         node = node->children[0];
  99                         goto loc0;
 100                 }
 101                 return;
 102         }
 103         if (dist < -light->radius)
 104         {
 105                 if (node->children[1]->contents >= 0) // LordHavoc: save some time by not pushing another stack frame
 106                 {
 107                         node = node->children[1];
 108                         goto loc0;
 109                 }
 110                 return;
 111         }
 112
 113         if (node->dlightframe != r_dlightframecount) // not dynamic until now
 114         {
 115                 node->dlightbits[0] = node->dlightbits[1] = node->dlightbits[2] = node->dlightbits[3] = node->dlightbits[4] = node->dlightbits[5] = node->dlightbits[6] = node->dlightbits[7] = 0;
 116                 node->dlightframe = r_dlightframecount;
 117         }
 118         node->dlightbits[bitindex] |= bit;
 119
 120 // mark the polygons
 121         surf = cl.worldmodel->surfaces + node->firstsurface;
 122         for (i=0 ; i<node->numsurfaces ; i++, surf++)
 123         {
 124                 if (surf->dlightframe != r_dlightframecount) // not dynamic until now
 125                 {
 126                         surf->dlightbits[0] = surf->dlightbits[1] = surf->dlightbits[2] = surf->dlightbits[3] = surf->dlightbits[4] = surf->dlightbits[5] = surf->dlightbits[6] = surf->dlightbits[7] = 0;
 127                         surf->dlightframe = r_dlightframecount;
 128                 }
 129                 surf->dlightbits[bitindex] |= bit;
 130         }
 131
 132         if (node->children[0]->contents >= 0)
 133         {
 134                 if (node->children[1]->contents >= 0)
 135                 {
 136                         R_OldMarkLights (lightorigin, light, bit, bitindex, node->children[0]);
 137                         node = node->children[1];
 138                         goto loc0;
 139                 }
 140                 else
 141                 {
 142                         node = node->children[0];
 143                         goto loc0;
 144                 }
 145         }
 146         else if (node->children[1]->contents >= 0)
 147         {
 148                 node = node->children[1];
 149                 goto loc0;
 150         }
 151 }
 152
 153 void R_NoVisMarkLights (vec3_t lightorigin, dlight_t *light, int bit, int bitindex, model_t *model)
 154 {
 155         R_OldMarkLights(lightorigin, light, bit, bitindex, model->nodes + model->hulls[0].firstclipnode);
 156 }
 157
 158 int lightframe = 0;
 159 void R_VisMarkLights (vec3_t lightorigin, dlight_t *light, int bit, int bitindex, model_t *model)
 160 {
 161         mleaf_t *pvsleaf = Mod_PointInLeaf (lightorigin, model);
 162
 163         if (!pvsleaf->compressed_vis)
 164         {       // no vis info, so make all visible
 165                 R_OldMarkLights(lightorigin, light, bit, bitindex, model->nodes + model->hulls[0].firstclipnode);
 166                 return;
 167         }
 168         else
 169         {
 170                 int             i, k, l, m, c;
 171                 msurface_t *surf, **mark;
 172                 mleaf_t *leaf;
 173                 byte    *in = pvsleaf->compressed_vis;
 174                 int             row = (model->numleafs+7)>>3;
 175                 float   low[3], high[3], radius;
 176
 177                 radius = light->radius * 4.0f;
 178                 low[0] = lightorigin[0] - radius;low[1] = lightorigin[1] - radius;low[2] = lightorigin[2] - radius;
 179                 high[0] = lightorigin[0] + radius;high[1] = lightorigin[1] + radius;high[2] = lightorigin[2] + radius;
 180
 181                 lightframe++;
 182                 k = 0;
 183                 while (k < row)
 184                 {
 185                         c = *in++;
 186                         if (c)
 187                         {
 188                                 l = model->numleafs - (k << 3);
 189                                 if (l > 8)
 190                                         l = 8;
 191                                 for (i=0 ; i<l ; i++)
 192                                 {
 193                                         if (c & (1<<i))
 194                                         {
 195                                                 leaf = &model->leafs[(k << 3)+i+1];
 196                                                 leaf->lightframe = lightframe;
 197                                                 if (leaf->visframe != r_visframecount)
 198                                                         continue;
 199                                                 if (leaf->contents == CONTENTS_SOLID)
 200                                                         continue;
 201                                                 // if out of the light radius, skip
 202                                                 /*
 203                                                 if (leaf->minmaxs[0] > high[0] || leaf->minmaxs[3] < low[0]
 204                                                  || leaf->minmaxs[1] > high[1] || leaf->minmaxs[4] < low[1]
 205                                                  || leaf->minmaxs[2] > high[2] || leaf->minmaxs[5] < low[2])
 206                                                         continue;
 207                                                 */
 208                                                 if (leaf->dlightframe != r_dlightframecount) // not dynamic until now
 209                                                 {
 210                                                         leaf->dlightbits[0] = leaf->dlightbits[1] = leaf->dlightbits[2] = leaf->dlightbits[3] = leaf->dlightbits[4] = leaf->dlightbits[5] = leaf->dlightbits[6] = leaf->dlightbits[7] = 0;
 211                                                         leaf->dlightframe = r_dlightframecount;
 212                                                 }
 213                                                 leaf->dlightbits[bitindex] |= bit;
 214                                                 if ((m = leaf->nummarksurfaces))
 215                                                 {
 216                                                         mark = leaf->firstmarksurface;
 217                                                         do
 218                                                         {
 219                                                                 surf = *mark++;
 220                                                                 if (surf->visframe != r_framecount || surf->lightframe == lightframe)
 221                                                                         continue;
 222                                                                 surf->lightframe = lightframe;
 223                                                                 //if (((surf->flags & SURF_PLANEBACK) == 0) == ((PlaneDiff(lightorigin, surf->plane)) >= 0))
 224                                                                 {
 225                                                                         if (surf->dlightframe != r_dlightframecount) // not dynamic until now
 226                                                                         {
 227                                                                                 surf->dlightbits[0] = surf->dlightbits[1] = surf->dlightbits[2] = surf->dlightbits[3] = surf->dlightbits[4] = surf->dlightbits[5] = surf->dlightbits[6] = surf->dlightbits[7] = 0;
 228                                                                                 surf->dlightframe = r_dlightframecount;
 229                                                                         }
 230                                                                         surf->dlightbits[bitindex] |= bit;
 231                                                                 }
 232                                                         }
 233                                                         while (--m);
 234                                                 }
 235                                         }
 236                                 }
 237                                 k++;
 238                                 continue;
 239                         }
 240
 241                         k += *in++;
 242                 }
 243         }
 244 }
 245
 246
 247 /*
 248 =============
 249 R_PushDlights
 250 =============
 251 */
 252 void R_PushDlights (void)
 253 {
 254         int             i;
 255         dlight_t        *l;
 256
 257         r_dlightframecount = r_framecount + 1;  // because the count hasn't advanced yet for this frame
 258
 259         if (!r_dynamic.value)
 260                 return;
 261
 262         l = cl_dlights;
 263
 264         for (i=0 ; i<MAX_DLIGHTS ; i++, l++)
 265         {
 266                 if (l->die < cl.time || !l->radius)
 267                         continue;
 268 //              R_MarkLights (l->origin, l, 1<<(i&31), i >> 5, cl.worldmodel->nodes );
 269                 R_VisMarkLights (l->origin, l, 1<<(i&31), i >> 5, cl.worldmodel);
 270         }
 271 }
 272
 273
 274 /*
 275 =============================================================================
 276
 277 LIGHT SAMPLING
 278
 279 =============================================================================
 280 */
 281
 282 mplane_t                *lightplane;
 283 vec3_t                  lightspot;
 284
 285 extern cvar_t r_ambient;
 286
 287 /*
 288 int RecursiveLightPoint (vec3_t color, mnode_t *node, vec3_t start, vec3_t end)
 289 {
 290         float           front, back, frac;
 291         vec3_t          mid;
 292
 293 loc0:
 294         if (node->contents < 0)
 295                 return false;           // didn't hit anything
 296
 297 // calculate mid point
 298         front = PlaneDiff (start, node->plane);
 299         back = PlaneDiff (end, node->plane);
 300
 301         // LordHavoc: optimized recursion
 302         if ((back < 0) == (front < 0))
 303 //              return RecursiveLightPoint (color, node->children[front < 0], start, end);
 304         {
 305                 node = node->children[front < 0];
 306                 goto loc0;
 307         }
 308
 309         frac = front / (front-back);
 310         mid[0] = start[0] + (end[0] - start[0])*frac;
 311         mid[1] = start[1] + (end[1] - start[1])*frac;
 312         mid[2] = start[2] + (end[2] - start[2])*frac;
 313
 314 // go down front side
 315         if (RecursiveLightPoint (color, node->children[front < 0], start, mid))
 316                 return true;    // hit something
 317         else
 318         {
 319                 int i, ds, dt;
 320                 msurface_t *surf;
 321         // check for impact on this node
 322                 VectorCopy (mid, lightspot);
 323                 lightplane = node->plane;
 324
 325                 surf = cl.worldmodel->surfaces + node->firstsurface;
 326                 for (i = 0;i < node->numsurfaces;i++, surf++)
 327                 {
 328                         if (surf->flags & SURF_DRAWTILED)
 329                                 continue;       // no lightmaps
 330
 331                         ds = (int) ((float) DotProduct (mid, surf->texinfo->vecs[0]) + surf->texinfo->vecs[0][3]);
 332                         dt = (int) ((float) DotProduct (mid, surf->texinfo->vecs[1]) + surf->texinfo->vecs[1][3]);
 333
 334                         if (ds < surf->texturemins[0] || dt < surf->texturemins[1])
 335                                 continue;
 336
 337                         ds -= surf->texturemins[0];
 338                         dt -= surf->texturemins[1];
 339
 340                         if (ds > surf->extents[0] || dt > surf->extents[1])
 341                                 continue;
 342
 343                         if (surf->samples)
 344                         {
 345                                 byte *lightmap;
 346                                 int maps, line3, dsfrac = ds & 15, dtfrac = dt & 15, r00 = 0, g00 = 0, b00 = 0, r01 = 0, g01 = 0, b01 = 0, r10 = 0, g10 = 0, b10 = 0, r11 = 0, g11 = 0, b11 = 0;
 347                                 float scale;
 348                                 line3 = ((surf->extents[0]>>4)+1)*3;
 349
 350                                 lightmap = surf->samples + ((dt>>4) * ((surf->extents[0]>>4)+1) + (ds>>4))*3; // LordHavoc: *3 for color
 351
 352                                 for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++)
 353                                 {
 354                                         scale = (float) d_lightstylevalue[surf->styles[maps]] * 1.0 / 256.0;
 355                                         r00 += (float) lightmap[      0] * scale;g00 += (float) lightmap[      1] * scale;b00 += (float) lightmap[2] * scale;
 356                                         r01 += (float) lightmap[      3] * scale;g01 += (float) lightmap[      4] * scale;b01 += (float) lightmap[5] * scale;
 357                                         r10 += (float) lightmap[line3+0] * scale;g10 += (float) lightmap[line3+1] * scale;b10 += (float) lightmap[line3+2] * scale;
 358                                         r11 += (float) lightmap[line3+3] * scale;g11 += (float) lightmap[line3+4] * scale;b11 += (float) lightmap[line3+5] * scale;
 359                                         lightmap += ((surf->extents[0]>>4)+1) * ((surf->extents[1]>>4)+1)*3; // LordHavoc: *3 for colored lighting
 360                                 }
 361
 362                                 color[0] += (float) ((int) ((((((((r11-r10) * dsfrac) >> 4) + r10)-((((r01-r00) * dsfrac) >> 4) + r00)) * dtfrac) >> 4) + ((((r01-r00) * dsfrac) >> 4) + r00)));
 363                                 color[1] += (float) ((int) ((((((((g11-g10) * dsfrac) >> 4) + g10)-((((g01-g00) * dsfrac) >> 4) + g00)) * dtfrac) >> 4) + ((((g01-g00) * dsfrac) >> 4) + g00)));
 364                                 color[2] += (float) ((int) ((((((((b11-b10) * dsfrac) >> 4) + b10)-((((b01-b00) * dsfrac) >> 4) + b00)) * dtfrac) >> 4) + ((((b01-b00) * dsfrac) >> 4) + b00)));
 365                         }
 366                         return true; // success
 367                 }
 368
 369         // go down back side
 370                 return RecursiveLightPoint (color, node->children[front >= 0], mid, end);
 371         }
 372 }
 373
 374 void R_LightPoint (vec3_t color, vec3_t p)
 375 {
 376         vec3_t          end;
 377
 378         if (r_fullbright.value || !cl.worldmodel->lightdata)
 379         {
 380                 color[0] = color[1] = color[2] = 255;
 381                 return;
 382         }
 383
 384         end[0] = p[0];
 385         end[1] = p[1];
 386         end[2] = p[2] - 2048;
 387
 388         color[0] = color[1] = color[2] = r_ambient.value * 2.0f;
 389         RecursiveLightPoint (color, cl.worldmodel->nodes, p, end);
 390 }
 391
 392 void SV_LightPoint (vec3_t color, vec3_t p)
 393 {
 394         vec3_t          end;
 395
 396         if (!sv.worldmodel->lightdata)
 397         {
 398                 color[0] = color[1] = color[2] = 255;
 399                 return;
 400         }
 401
 402         end[0] = p[0];
 403         end[1] = p[1];
 404         end[2] = p[2] - 2048;
 405
 406         color[0] = color[1] = color[2] = 0;
 407         RecursiveLightPoint (color, sv.worldmodel->nodes, p, end);
 408 }
 409 */
 410
 411 int RecursiveLightPoint (vec3_t color, mnode_t *node, float x, float y, float startz, float endz)
 412 {
 413         int             side, distz = endz - startz;
 414         float   front, back;
 415         float   mid;
 416
 417 loc0:
 418         if (node->contents < 0)
 419                 return false;           // didn't hit anything
 420
 421         switch (node->plane->type)
 422         {
 423         case PLANE_X:
 424                 node = node->children[x < node->plane->dist];
 425                 goto loc0;
 426         case PLANE_Y:
 427                 node = node->children[y < node->plane->dist];
 428                 goto loc0;
 429         case PLANE_Z:
 430                 side = startz < node->plane->dist;
 431                 if ((endz < node->plane->dist) == side)
 432                 {
 433                         node = node->children[side];
 434                         goto loc0;
 435                 }
 436                 // found an intersection
 437 //              mid = startz + (endz - startz) * (startz - node->plane->dist) / (startz - endz);
 438 //              mid = startz + distz * (startz - node->plane->dist) / (-distz);
 439 //              mid = startz + (-(startz - node->plane->dist));
 440 //              mid = startz - (startz - node->plane->dist);
 441 //              mid = startz + node->plane->dist - startz;
 442                 mid = node->plane->dist;
 443                 break;
 444         default:
 445                 back = front = x * node->plane->normal[0] + y * node->plane->normal[1];
 446                 front += startz * node->plane->normal[2];
 447                 back += endz * node->plane->normal[2];
 448                 side = front < node->plane->dist;
 449                 if ((back < node->plane->dist) == side)
 450                 {
 451                         node = node->children[side];
 452                         goto loc0;
 453                 }
 454                 // found an intersection
 455 //              mid = startz + (endz - startz) * ((front - node->plane->dist) / ((front - node->plane->dist) - (back - node->plane->dist)));
 456 //              mid = startz + (endz - startz) * ((front - node->plane->dist) / (front - back));
 457                 mid = startz + distz * (front - node->plane->dist) / (front - back);
 458                 break;
 459         }
 460
 461         // go down front side
 462         if (node->children[side]->contents >= 0 && RecursiveLightPoint (color, node->children[side], x, y, startz, mid))
 463                 return true;    // hit something
 464         else
 465         {
 466                 // check for impact on this node
 467                 if (node->numsurfaces)
 468                 {
 469                         int i, ds, dt;
 470                         msurface_t *surf;
 471                         lightspot[0] = x;
 472                         lightspot[1] = y;
 473                         lightspot[2] = mid;
 474                         lightplane = node->plane;
 475
 476                         surf = cl.worldmodel->surfaces + node->firstsurface;
 477                         for (i = 0;i < node->numsurfaces;i++, surf++)
 478                         {
 479                                 if (surf->flags & SURF_DRAWTILED)
 480                                         continue;       // no lightmaps
 481
 482                                 ds = (int) (x * surf->texinfo->vecs[0][0] + y * surf->texinfo->vecs[0][1] + mid * surf->texinfo->vecs[0][2] + surf->texinfo->vecs[0][3]);
 483                                 dt = (int) (x * surf->texinfo->vecs[1][0] + y * surf->texinfo->vecs[1][1] + mid * surf->texinfo->vecs[1][2] + surf->texinfo->vecs[1][3]);
 484
 485                                 if (ds < surf->texturemins[0] || dt < surf->texturemins[1])
 486                                         continue;
 487
 488                                 ds -= surf->texturemins[0];
 489                                 dt -= surf->texturemins[1];
 490
 491                                 if (ds > surf->extents[0] || dt > surf->extents[1])
 492                                         continue;
 493
 494                                 if (surf->samples)
 495                                 {
 496                                         byte *lightmap;
 497                                         int maps, line3, size3, dsfrac = ds & 15, dtfrac = dt & 15, scale = 0, r00 = 0, g00 = 0, b00 = 0, r01 = 0, g01 = 0, b01 = 0, r10 = 0, g10 = 0, b10 = 0, r11 = 0, g11 = 0, b11 = 0;
 498                                         line3 = ((surf->extents[0]>>4)+1)*3;
 499                                         size3 = ((surf->extents[0]>>4)+1) * ((surf->extents[1]>>4)+1)*3; // LordHavoc: *3 for colored lighting
 500
 501                                         lightmap = surf->samples + ((dt>>4) * ((surf->extents[0]>>4)+1) + (ds>>4))*3; // LordHavoc: *3 for color
 502
 503                                         for (maps = 0;maps < MAXLIGHTMAPS && surf->styles[maps] != 255;maps++)
 504                                         {
 505                                                 scale = d_lightstylevalue[surf->styles[maps]];
 506                                                 r00 += lightmap[      0] * scale;g00 += lightmap[      1] * scale;b00 += lightmap[      2] * scale;
 507                                                 r01 += lightmap[      3] * scale;g01 += lightmap[      4] * scale;b01 += lightmap[      5] * scale;
 508                                                 r10 += lightmap[line3+0] * scale;g10 += lightmap[line3+1] * scale;b10 += lightmap[line3+2] * scale;
 509                                                 r11 += lightmap[line3+3] * scale;g11 += lightmap[line3+4] * scale;b11 += lightmap[line3+5] * scale;
 510                                                 lightmap += size3;
 511                                         }
 512
 513                                         color[0] += (float) ((((((((r11-r10) * dsfrac) >> 4) + r10)-((((r01-r00) * dsfrac) >> 4) + r00)) * dtfrac) >> 4) + ((((r01-r00) * dsfrac) >> 4) + r00)) * (1.0f / 256.0f);
 514                                         color[1] += (float) ((((((((g11-g10) * dsfrac) >> 4) + g10)-((((g01-g00) * dsfrac) >> 4) + g00)) * dtfrac) >> 4) + ((((g01-g00) * dsfrac) >> 4) + g00)) * (1.0f / 256.0f);
 515                                         color[2] += (float) ((((((((b11-b10) * dsfrac) >> 4) + b10)-((((b01-b00) * dsfrac) >> 4) + b00)) * dtfrac) >> 4) + ((((b01-b00) * dsfrac) >> 4) + b00)) * (1.0f / 256.0f);
 516                                 }
 517                                 return true; // success
 518                         }
 519                 }
 520
 521                 // go down back side
 522                 node = node->children[side ^ 1];
 523                 startz = mid;
 524                 distz = endz - startz;
 525                 goto loc0;
 526 //              return RecursiveLightPoint (color, node->children[side ^ 1], x, y, mid, endz);
 527         }
 528 }
 529
 530 void R_LightPoint (vec3_t color, vec3_t p)
 531 {
 532         if (r_fullbright.value || !cl.worldmodel->lightdata)
 533         {
 534                 color[0] = color[1] = color[2] = 255;
 535                 return;
 536         }
 537
 538         color[0] = color[1] = color[2] = r_ambient.value * 2.0f;
 539         RecursiveLightPoint (color, cl.worldmodel->nodes, p[0], p[1], p[2], p[2] - 65536);
 540 }
 541
 542 // LordHavoc: added light checking to the server
 543 void SV_LightPoint (vec3_t color, vec3_t p)
 544 {
 545         if (!sv.worldmodel->lightdata)
 546         {
 547                 color[0] = color[1] = color[2] = 255;
 548                 return;
 549         }
 550
 551         color[0] = color[1] = color[2] = 0;
 552         RecursiveLightPoint (color, sv.worldmodel->nodes, p[0], p[1], p[2], p[2] - 65536);
 553 }
 554
 555 // LordHavoc: R_DynamicLightPoint - acumulates the dynamic lighting
 556 void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits)
 557 {
 558         int             i, j, k;
 559         vec3_t  dist;
 560         float   brightness, r, f;
 561
 562         if (!r_dynamic.value || (!dlightbits[0] && !dlightbits[1] && !dlightbits[2] && !dlightbits[3] && !dlightbits[4] && !dlightbits[5] && !dlightbits[6] && !dlightbits[7]))
 563                 return;
 564
 565         for (j = 0;j < (MAX_DLIGHTS >> 5);j++)
 566         {
 567                 if (dlightbits[j])
 568                 {
 569                         for (i=0 ; i<32 ; i++)
 570                         {
 571                                 if ((!((1 << (i&31)) & dlightbits[i>>5])) || cl_dlights[i].die < cl.time || !cl_dlights[i].radius)
 572                                         continue;
 573                                 k = (j<<5)+i;
 574                                 VectorSubtract (org, cl_dlights[k].origin, dist);
 575                                 f = DotProduct(dist, dist) + LIGHTOFFSET;
 576                                 r = cl_dlights[k].radius*cl_dlights[k].radius*LIGHTSCALE;
 577                                 if (f < r)
 578                                 {
 579                                         brightness = r * 16.0f / f;
 580                                         color[0] += brightness * cl_dlights[k].color[0];
 581                                         color[1] += brightness * cl_dlights[k].color[1];
 582                                         color[2] += brightness * cl_dlights[k].color[2];
 583                                 }
 584                         }
 585                 }
 586         }
 587 }
 588
 589 // same as above but no bitmask to check
 590 void R_DynamicLightPointNoMask(vec3_t color, vec3_t org)
 591 {
 592         int             i;
 593         vec3_t  dist;
 594         float   brightness, r, f;
 595
 596         if (!r_dynamic.value)
 597                 return;
 598
 599         for (i=0 ; i<MAX_DLIGHTS ; i++)
 600         {
 601                 if (cl_dlights[i].die < cl.time || !cl_dlights[i].radius)
 602                         continue;
 603                 VectorSubtract (org, cl_dlights[i].origin, dist);
 604                 f = DotProduct(dist, dist) + LIGHTOFFSET;
 605                 r = cl_dlights[i].radius*cl_dlights[i].radius*LIGHTSCALE;
 606                 if (f < r)
 607                 {
 608                         brightness = r * 16.0f / f;
 609                         if (cl_dlights[i].dark)
 610                                 brightness = -brightness;
 611                         color[0] += brightness * cl_dlights[i].color[0];
 612                         color[1] += brightness * cl_dlights[i].color[1];
 613                         color[2] += brightness * cl_dlights[i].color[2];
 614                 }
 615         }
 616 }
 617
 618 void R_CompleteLightPoint (vec3_t color, vec3_t p)
 619 {
 620         R_LightPoint(color, p);
 621         R_DynamicLightPointNoMask(color, p);
 622 }
 623
 624 extern float *aliasvert;
 625 extern float *aliasvertnorm;
 626 extern byte *aliasvertcolor;
 627 extern float modelalpha;
 628 extern qboolean lighthalf;
 629 extern int modeldlightbits[8];
 630 void R_LightModel(int numverts, vec3_t center, vec3_t basecolor)
 631 {
 632         // LordHavoc: warning: reliance on int being 4 bytes here (of course the d_8to24table relies on that too...)
 633         int i, j, nearlights = 0, color;
 634         vec3_t dist, mod;
 635         float t, t1, t2, t3, *avn;
 636         byte r,g,b,a, *avc;
 637         struct
 638         {
 639                 vec3_t color;
 640                 vec3_t origin;
 641         } nearlight[MAX_DLIGHTS];
 642         avc = aliasvertcolor;
 643         avn = aliasvertnorm;
 644         a = (byte) bound((int) 0, (int) (modelalpha * 255.0f), (int) 255);
 645         if (currententity->effects & EF_FULLBRIGHT)
 646         {
 647                 if (lighthalf)
 648                 {
 649                         ((byte *)&color)[0] = (byte) ((float) (128.0f * currententity->colormod[0]));
 650                         ((byte *)&color)[1] = (byte) ((float) (128.0f * currententity->colormod[1]));
 651                         ((byte *)&color)[2] = (byte) ((float) (128.0f * currententity->colormod[2]));
 652                 }
 653                 else
 654                 {
 655                         ((byte *)&color)[0] = (byte) ((float) (255.0f * currententity->colormod[0]));
 656                         ((byte *)&color)[1] = (byte) ((float) (255.0f * currententity->colormod[1]));
 657                         ((byte *)&color)[2] = (byte) ((float) (255.0f * currententity->colormod[2]));
 658                 }
 659                 ((byte *)&color)[3] = a;
 660                 for (i = 0;i < numverts;i++)
 661                 {
 662                         *((int *)avc) = color;
 663                         avc += 4;
 664                 }
 665                 return;
 666         }
 667         if (lighthalf)
 668         {
 669                 mod[0] = currententity->colormod[0] * 0.5f;
 670                 mod[1] = currententity->colormod[1] * 0.5f;
 671                 mod[2] = currententity->colormod[2] * 0.5f;
 672         }
 673         else
 674         {
 675                 mod[0] = currententity->colormod[0];
 676                 mod[1] = currententity->colormod[1];
 677                 mod[2] = currententity->colormod[2];
 678         }
 679         basecolor[0] *= mod[0];
 680         basecolor[1] *= mod[1];
 681         basecolor[2] *= mod[2];
 682         if (r_lightmodels.value)
 683         {
 684                 for (i = 0;i < MAX_DLIGHTS;i++)
 685                 {
 686                         if (!modeldlightbits[i >> 5])
 687                         {
 688                                 i |= 31;
 689                                 continue;
 690                         }
 691                         if (!(modeldlightbits[i >> 5] & (1 << (i & 31))))
 692                                 continue;
 693                         VectorSubtract (center, cl_dlights[i].origin, dist);
 694                         t1 = cl_dlights[i].radius*cl_dlights[i].radius*LIGHTSCALE;
 695                         t2 = DotProduct(dist,dist) + LIGHTOFFSET;
 696                         if (t2 < t1)
 697                         {
 698                                 VectorCopy(cl_dlights[i].origin, nearlight[nearlights].origin);
 699                                 nearlight[nearlights].color[0] = cl_dlights[i].color[0] * cl_dlights[i].radius * cl_dlights[i].radius * mod[0];
 700                                 nearlight[nearlights].color[1] = cl_dlights[i].color[1] * cl_dlights[i].radius * cl_dlights[i].radius * mod[1];
 701                                 nearlight[nearlights].color[2] = cl_dlights[i].color[2] * cl_dlights[i].radius * cl_dlights[i].radius * mod[2];
 702                                 t1 = (128.0f / LIGHTSCALE) / t2;
 703                                 basecolor[0] += nearlight[nearlights].color[0] * t1;
 704                                 basecolor[1] += nearlight[nearlights].color[1] * t1;
 705                                 basecolor[2] += nearlight[nearlights].color[2] * t1;
 706                                 nearlights++;
 707                         }
 708                 }
 709         }
 710         else
 711         {
 712                 for (i = 0;i < MAX_DLIGHTS;i++)
 713                 {
 714                         if (!modeldlightbits[i >> 5])
 715                         {
 716                                 i |= 31;
 717                                 continue;
 718                         }
 719                         if (!(modeldlightbits[i >> 5] & (1 << (i & 31))))
 720                                 continue;
 721                         VectorSubtract (center, cl_dlights[i].origin, dist);
 722                         t1 = cl_dlights[i].radius*cl_dlights[i].radius*LIGHTSCALE;
 723                         t2 = DotProduct(dist,dist) + LIGHTOFFSET;
 724                         if (t2 < t1)
 725                         {
 726                                 dist[0] = cl_dlights[i].color[0] * cl_dlights[i].radius * cl_dlights[i].radius * mod[0];
 727                                 dist[1] = cl_dlights[i].color[1] * cl_dlights[i].radius * cl_dlights[i].radius * mod[1];
 728                                 dist[2] = cl_dlights[i].color[2] * cl_dlights[i].radius * cl_dlights[i].radius * mod[2];
 729                                 t1 = (192.0f / LIGHTSCALE) / t2;
 730                                 basecolor[0] += dist[0] * t1;
 731                                 basecolor[1] += dist[1] * t1;
 732                                 basecolor[2] += dist[2] * t1;
 733                         }
 734                 }
 735         }
 736         t1 = bound(0, basecolor[0], 255);r = (byte) t1;
 737         t1 = bound(0, basecolor[1], 255);g = (byte) t1;
 738         t1 = bound(0, basecolor[2], 255);b = (byte) t1;
 739         ((byte *)&color)[0] = r;
 740         ((byte *)&color)[1] = g;
 741         ((byte *)&color)[2] = b;
 742         ((byte *)&color)[3] = a;
 743         if (nearlights)
 744         {
 745                 int temp;
 746                 vec3_t v;
 747                 float *av;
 748                 av = aliasvert;
 749                 if (nearlights == 1)
 750                 {
 751                         for (i = 0;i < numverts;i++)
 752                         {
 753                                 VectorSubtract(nearlight[0].origin, av, v);
 754                                 t = DotProduct(avn,v);
 755                                 if (t > 0)
 756                                 {
 757                                         t /= DotProduct(v,v);
 758                                         temp = (int) ((float) (basecolor[0] + nearlight[0].color[0] * t));if (temp < 0) temp = 0;else if (temp > 255) temp = 255;avc[0] = temp;
 759                                         temp = (int) ((float) (basecolor[1] + nearlight[0].color[1] * t));if (temp < 0) temp = 0;else if (temp > 255) temp = 255;avc[1] = temp;
 760                                         temp = (int) ((float) (basecolor[2] + nearlight[0].color[2] * t));if (temp < 0) temp = 0;else if (temp > 255) temp = 255;avc[2] = temp;
 761                                         avc[3] = a;
 762                                 }
 763                                 else
 764                                         *((int *)avc) = color;
 765                                 avc += 4;
 766                                 av+=3;
 767                                 avn+=3;
 768                         }
 769                 }
 770                 else
 771                 {
 772                         int i1, i2, i3, k;
 773                         for (i = 0;i < numverts;i++)
 774                         {
 775                                 t1 = basecolor[0];
 776                                 t2 = basecolor[1];
 777                                 t3 = basecolor[2];
 778                                 k = false;
 779                                 for (j = 0;j < nearlights;j++)
 780                                 {
 781                                         VectorSubtract(nearlight[j].origin, av, v);
 782                                         t = DotProduct(avn,v);
 783                                         if (t > 0)
 784                                         {
 785                                                 t /= DotProduct(v,v);
 786                                                 t1 += nearlight[j].color[0] * t;
 787                                                 t2 += nearlight[j].color[1] * t;
 788                                                 t3 += nearlight[j].color[2] * t;
 789                                                 k = true;
 790                                         }
 791                                 }
 792                                 if (k) // dodge the costly float -> int conversions
 793                                 {
 794                                         i1 = t1;if (i1 < 0) i1 = 0;else if (i1 > 255) i1 = 255;avc[0] = i1;
 795                                         i2 = t2;if (i2 < 0) i2 = 0;else if (i2 > 255) i2 = 255;avc[1] = i2;
 796                                         i3 = t3;if (i3 < 0) i3 = 0;else if (i3 > 255) i3 = 255;avc[2] = i3;
 797                                         avc[3] = a;
 798                                 }
 799                                 else
 800                                         *((int *)avc) = color;
 801                                 avc += 4;
 802                         }
 803                 }
 804         }
 805         else
 806         {
 807                 for (i = 0;i < numverts;i++)
 808                 {
 809                         *((int *)avc) = color;
 810                         avc += 4;
 811                 }
 812         }
 813 }