gl_backend.c

   1
   2 #include "quakedef.h"
   3
   4 static int max_meshs;
   5 static int max_batch;
   6 static int max_verts; // always max_meshs * 3
   7 #define TRANSDEPTHRES 4096
   8
   9 static cvar_t gl_mesh_maxtriangles = {0, "gl_mesh_maxtriangles", "21760"};
  10 static cvar_t gl_mesh_batchtriangles = {0, "gl_mesh_batchtriangles", "1024"};
  11 static cvar_t gl_mesh_merge = {0, "gl_mesh_merge", "1"};
  12 static cvar_t gl_mesh_floatcolors = {0, "gl_mesh_floatcolors", "1"};
  13
  14 typedef struct buf_mesh_s
  15 {
  16         struct buf_mesh_s *next;
  17         int depthmask;
  18         int depthtest;
  19         int blendfunc1, blendfunc2;
  20         int textures[MAX_TEXTUREUNITS];
  21         float texturergbscale[MAX_TEXTUREUNITS];
  22         int firsttriangle;
  23         int triangles;
  24         int firstvert;
  25         int lastvert;
  26 }
  27 buf_mesh_t;
  28
  29 typedef struct buf_transtri_s
  30 {
  31         struct buf_transtri_s *next;
  32         buf_mesh_t *mesh;
  33         int index[3];
  34 }
  35 buf_transtri_t;
  36
  37 typedef struct buf_tri_s
  38 {
  39         int index[3];
  40 }
  41 buf_tri_t;
  42
  43 typedef struct
  44 {
  45         float v[4];
  46 }
  47 buf_vertex_t;
  48
  49 typedef struct
  50 {
  51         float c[4];
  52 }
  53 buf_fcolor_t;
  54
  55 typedef struct
  56 {
  57         byte c[4];
  58 }
  59 buf_bcolor_t;
  60
  61 typedef struct
  62 {
  63         float t[2];
  64 }
  65 buf_texcoord_t;
  66
  67 static float meshfarclip;
  68 static int currentmesh, currenttriangle, currentvertex, backendunits, backendactive, meshmerge, floatcolors, transranout;
  69 static buf_mesh_t *buf_mesh;
  70 static buf_tri_t *buf_tri;
  71 static buf_vertex_t *buf_vertex;
  72 static buf_fcolor_t *buf_fcolor;
  73 static buf_bcolor_t *buf_bcolor;
  74 static buf_texcoord_t *buf_texcoord[MAX_TEXTUREUNITS];
  75
  76 static int currenttransmesh, currenttransvertex, currenttranstriangle;
  77 static buf_mesh_t *buf_transmesh;
  78 static buf_transtri_t *buf_transtri;
  79 static buf_transtri_t **buf_transtri_list;
  80 static buf_vertex_t *buf_transvertex;
  81 static buf_fcolor_t *buf_transfcolor;
  82 static buf_bcolor_t *buf_transbcolor;
  83 static buf_texcoord_t *buf_transtexcoord[MAX_TEXTUREUNITS];
  84
  85 static mempool_t *gl_backend_mempool;
  86
  87 static void gl_backend_start(void)
  88 {
  89         int i;
  90
  91         max_verts = max_meshs * 3;
  92
  93         gl_backend_mempool = Mem_AllocPool("GL_Backend");
  94
  95 #define BACKENDALLOC(var, count, sizeofstruct)\
  96         {\
  97                 var = Mem_Alloc(gl_backend_mempool, count * sizeof(sizeofstruct));\
  98                 if (var == NULL)\
  99                         Sys_Error("gl_backend_start: unable to allocate memory\n");\
 100                 memset(var, 0, count * sizeof(sizeofstruct));\
 101         }
 102
 103         BACKENDALLOC(buf_mesh, max_meshs, buf_mesh_t)
 104         BACKENDALLOC(buf_tri, max_meshs, buf_tri_t)
 105         BACKENDALLOC(buf_vertex, max_verts, buf_vertex_t)
 106         BACKENDALLOC(buf_fcolor, max_verts, buf_fcolor_t)
 107         BACKENDALLOC(buf_bcolor, max_verts, buf_bcolor_t)
 108
 109         BACKENDALLOC(buf_transmesh, max_meshs, buf_mesh_t)
 110         BACKENDALLOC(buf_transtri, max_meshs, buf_transtri_t)
 111         BACKENDALLOC(buf_transtri_list, TRANSDEPTHRES, buf_transtri_t *)
 112         BACKENDALLOC(buf_transvertex, max_verts, buf_vertex_t)
 113         BACKENDALLOC(buf_transfcolor, max_verts, buf_fcolor_t)
 114         BACKENDALLOC(buf_transbcolor, max_verts, buf_bcolor_t)
 115
 116         for (i = 0;i < MAX_TEXTUREUNITS;i++)
 117         {
 118                 // only allocate as many texcoord arrays as we need
 119                 if (i < gl_textureunits)
 120                 {
 121                         BACKENDALLOC(buf_texcoord[i], max_verts, buf_texcoord_t)
 122                         BACKENDALLOC(buf_transtexcoord[i], max_verts, buf_texcoord_t)
 123                 }
 124                 else
 125                 {
 126                         buf_texcoord[i] = NULL;
 127                         buf_transtexcoord[i] = NULL;
 128                 }
 129         }
 130         backendunits = min(MAX_TEXTUREUNITS, gl_textureunits);
 131         backendactive = true;
 132 }
 133
 134 static void gl_backend_shutdown(void)
 135 {
 136         int i;
 137         /*
 138 #define BACKENDFREE(var)\
 139         if (var)\
 140         {\
 141                 Mem_Free(var);\
 142                 var = NULL;\
 143         }
 144         */
 145 #define BACKENDFREE(var) var = NULL;
 146
 147         BACKENDFREE(buf_mesh)
 148         BACKENDFREE(buf_tri)
 149         BACKENDFREE(buf_vertex)
 150         BACKENDFREE(buf_fcolor)
 151         BACKENDFREE(buf_bcolor)
 152
 153         BACKENDFREE(buf_transmesh)
 154         BACKENDFREE(buf_transtri)
 155         BACKENDFREE(buf_transtri_list)
 156         BACKENDFREE(buf_transvertex)
 157         BACKENDFREE(buf_transfcolor)
 158         BACKENDFREE(buf_transbcolor)
 159
 160         for (i = 0;i < MAX_TEXTUREUNITS;i++)
 161         {
 162                 BACKENDFREE(buf_texcoord[i])
 163                 BACKENDFREE(buf_transtexcoord[i])
 164         }
 165
 166         Mem_FreePool(&gl_backend_mempool);
 167
 168         backendunits = 0;
 169         backendactive = false;
 170 }
 171
 172 static void gl_backend_bufferchanges(int init)
 173 {
 174         // 21760 is (65536 / 3) rounded off to a multiple of 128
 175         if (gl_mesh_maxtriangles.integer < 256)
 176                 Cvar_SetValue("gl_mesh_maxtriangles", 256);
 177         if (gl_mesh_maxtriangles.integer > 21760)
 178                 Cvar_SetValue("gl_mesh_maxtriangles", 21760);
 179
 180         if (gl_mesh_batchtriangles.integer < 0)
 181                 Cvar_SetValue("gl_mesh_batchtriangles", 0);
 182         if (gl_mesh_batchtriangles.integer > gl_mesh_maxtriangles.integer)
 183                 Cvar_SetValue("gl_mesh_batchtriangles", gl_mesh_maxtriangles.integer);
 184
 185         max_batch = gl_mesh_batchtriangles.integer;
 186
 187         if (max_meshs != gl_mesh_maxtriangles.integer)
 188         {
 189                 max_meshs = gl_mesh_maxtriangles.integer;
 190
 191                 if (!init)
 192                 {
 193                         gl_backend_shutdown();
 194                         gl_backend_start();
 195                 }
 196         }
 197 }
 198
 199 float r_farclip, r_newfarclip;
 200
 201 static void gl_backend_newmap(void)
 202 {
 203         r_farclip = r_newfarclip = 2048.0f;
 204 }
 205
 206 int polyindexarray[768];
 207
 208 void gl_backend_init(void)
 209 {
 210         int i;
 211         Cvar_RegisterVariable(&gl_mesh_maxtriangles);
 212         Cvar_RegisterVariable(&gl_mesh_batchtriangles);
 213         Cvar_RegisterVariable(&gl_mesh_merge);
 214         Cvar_RegisterVariable(&gl_mesh_floatcolors);
 215         R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
 216         gl_backend_bufferchanges(true);
 217         for (i = 0;i < 256;i++)
 218         {
 219                 polyindexarray[i*3+0] = 0;
 220                 polyindexarray[i*3+1] = i + 1;
 221                 polyindexarray[i*3+2] = i + 2;
 222         }
 223 }
 224
 225 static float viewdist;
 226
 227 int c_meshtris;
 228
 229 // called at beginning of frame
 230 void R_Mesh_Clear(void)
 231 {
 232         if (!backendactive)
 233                 Sys_Error("R_Mesh_Clear: called when backend is not active\n");
 234
 235         gl_backend_bufferchanges(false);
 236
 237         currentmesh = 0;
 238         currenttriangle = 0;
 239         currentvertex = 0;
 240         currenttransmesh = 0;
 241         currenttranstriangle = 0;
 242         currenttransvertex = 0;
 243         meshfarclip = 0;
 244         meshmerge = gl_mesh_merge.integer;
 245         floatcolors = gl_mesh_floatcolors.integer;
 246         transranout = false;
 247         viewdist = DotProduct(r_origin, vpn);
 248
 249         c_meshtris = 0;
 250 }
 251
 252 #ifdef DEBUGGL
 253 void GL_PrintError(int errornumber, char *filename, int linenumber)
 254 {
 255         switch(errornumber)
 256         {
 257         case GL_INVALID_ENUM:
 258                 Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
 259                 break;
 260         case GL_INVALID_VALUE:
 261                 Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
 262                 break;
 263         case GL_INVALID_OPERATION:
 264                 Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
 265                 break;
 266         case GL_STACK_OVERFLOW:
 267                 Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
 268                 break;
 269         case GL_STACK_UNDERFLOW:
 270                 Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
 271                 break;
 272         case GL_OUT_OF_MEMORY:
 273                 Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
 274                 break;
 275 #ifdef GL_TABLE_TOO_LARGE
 276     case GL_TABLE_TOO_LARGE:
 277                 Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
 278                 break;
 279 #endif
 280         default:
 281                 Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
 282                 break;
 283         }
 284 }
 285
 286 int errornumber = 0;
 287 #endif
 288
 289 // renders mesh buffers, called to flush buffers when full
 290 void R_Mesh_Render(void)
 291 {
 292         int i, k, blendfunc1, blendfunc2, blend, depthmask, depthtest, unit = 0, clientunit = 0, firsttriangle, triangles, firstvert, lastvert, texture[MAX_TEXTUREUNITS];
 293         float farclip, texturergbscale[MAX_TEXTUREUNITS];
 294         buf_mesh_t *mesh;
 295         if (!backendactive)
 296                 Sys_Error("R_Mesh_Render: called when backend is not active\n");
 297         if (!currentmesh)
 298                 return;
 299
 300 CHECKGLERROR
 301
 302         farclip = meshfarclip + 256.0f - viewdist; // + 256 just to be safe
 303
 304         // push out farclip for next frame
 305         if (farclip > r_newfarclip)
 306                 r_newfarclip = ceil((farclip + 255) / 256) * 256 + 256;
 307
 308         for (i = 0;i < backendunits;i++)
 309                 texturergbscale[i] = 1;
 310
 311         glEnable(GL_CULL_FACE);
 312 CHECKGLERROR
 313         glCullFace(GL_FRONT);
 314 CHECKGLERROR
 315         depthtest = true;
 316         glEnable(GL_DEPTH_TEST);
 317 CHECKGLERROR
 318         blendfunc1 = GL_ONE;
 319         blendfunc2 = GL_ZERO;
 320         glBlendFunc(blendfunc1, blendfunc2);
 321 CHECKGLERROR
 322         blend = 0;
 323         glDisable(GL_BLEND);
 324 CHECKGLERROR
 325         depthmask = true;
 326         glDepthMask((GLboolean) depthmask);
 327 CHECKGLERROR
 328
 329 CHECKGLERROR
 330         glVertexPointer(3, GL_FLOAT, sizeof(buf_vertex_t), buf_vertex);
 331 CHECKGLERROR
 332         glEnableClientState(GL_VERTEX_ARRAY);
 333 CHECKGLERROR
 334         if (floatcolors)
 335         {
 336                 glColorPointer(4, GL_FLOAT, sizeof(buf_fcolor_t), buf_fcolor);
 337 CHECKGLERROR
 338         }
 339         else
 340         {
 341                 glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(buf_bcolor_t), buf_bcolor);
 342 CHECKGLERROR
 343         }
 344         glEnableClientState(GL_COLOR_ARRAY);
 345 CHECKGLERROR
 346
 347         if (backendunits > 1)
 348         {
 349                 for (i = 0;i < backendunits;i++)
 350                 {
 351                         qglActiveTexture(GL_TEXTURE0_ARB + (unit = i));
 352 CHECKGLERROR
 353                         glBindTexture(GL_TEXTURE_2D, (texture[i] = 0));
 354 CHECKGLERROR
 355                         glDisable(GL_TEXTURE_2D);
 356 CHECKGLERROR
 357                         if (gl_combine.integer)
 358                         {
 359                                 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
 360 CHECKGLERROR
 361                                 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);
 362 CHECKGLERROR
 363                                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);
 364 CHECKGLERROR
 365                                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);
 366 CHECKGLERROR
 367                                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB);
 368 CHECKGLERROR
 369                                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);
 370 CHECKGLERROR
 371                                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);
 372 CHECKGLERROR
 373                                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);
 374 CHECKGLERROR
 375                                 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);
 376 CHECKGLERROR
 377                                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);
 378 CHECKGLERROR
 379                                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);
 380 CHECKGLERROR
 381                                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);
 382 CHECKGLERROR
 383                                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);
 384 CHECKGLERROR
 385                                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);
 386 CHECKGLERROR
 387                                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);
 388 CHECKGLERROR
 389                                 glTexEnvf(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1.0f);
 390 CHECKGLERROR
 391                                 glTexEnvf(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1.0f);
 392 CHECKGLERROR
 393                         }
 394                         else
 395                         {
 396                                 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 397 CHECKGLERROR
 398                         }
 399
 400                         qglClientActiveTexture(GL_TEXTURE0_ARB + (clientunit = i));
 401 CHECKGLERROR
 402                         glTexCoordPointer(2, GL_FLOAT, sizeof(buf_texcoord_t), buf_texcoord[i]);
 403 CHECKGLERROR
 404                         glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 405 CHECKGLERROR
 406                 }
 407         }
 408         else
 409         {
 410                 glBindTexture(GL_TEXTURE_2D, (texture[0] = 0));
 411 CHECKGLERROR
 412                 glDisable(GL_TEXTURE_2D);
 413 CHECKGLERROR
 414                 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 415 CHECKGLERROR
 416
 417                 glTexCoordPointer(2, GL_FLOAT, sizeof(buf_texcoord_t), buf_texcoord[0]);
 418 CHECKGLERROR
 419                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 420 CHECKGLERROR
 421         }
 422
 423         // lock as early as possible
 424         GL_LockArray(0, currentvertex);
 425 CHECKGLERROR
 426
 427         for (k = 0;k < currentmesh;)
 428         {
 429                 mesh = &buf_mesh[k];
 430
 431                 if (backendunits > 1)
 432                 {
 433 //                      int topunit = 0;
 434                         for (i = 0;i < backendunits;i++)
 435                         {
 436                                 if (texture[i] != mesh->textures[i])
 437                                 {
 438                                         if (unit != i)
 439                                         {
 440                                                 qglActiveTexture(GL_TEXTURE0_ARB + (unit = i));
 441 CHECKGLERROR
 442                                         }
 443                                         if (texture[i] == 0)
 444                                         {
 445                                                 glEnable(GL_TEXTURE_2D);
 446 CHECKGLERROR
 447                                                 // have to disable texcoord array on disabled texture
 448                                                 // units due to NVIDIA driver bug with
 449                                                 // compiled_vertex_array
 450                                                 if (clientunit != i)
 451                                                 {
 452                                                         qglClientActiveTexture(GL_TEXTURE0_ARB + (clientunit = i));
 453 CHECKGLERROR
 454                                                 }
 455                                                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 456 CHECKGLERROR
 457                                         }
 458                                         glBindTexture(GL_TEXTURE_2D, (texture[i] = mesh->textures[i]));
 459 CHECKGLERROR
 460                                         if (texture[i] == 0)
 461                                         {
 462                                                 glDisable(GL_TEXTURE_2D);
 463 CHECKGLERROR
 464                                                 // have to disable texcoord array on disabled texture
 465                                                 // units due to NVIDIA driver bug with
 466                                                 // compiled_vertex_array
 467                                                 if (clientunit != i)
 468                                                 {
 469                                                         qglClientActiveTexture(GL_TEXTURE0_ARB + (clientunit = i));
 470 CHECKGLERROR
 471                                                 }
 472                                                 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 473 CHECKGLERROR
 474                                         }
 475                                 }
 476                                 if (texturergbscale[i] != mesh->texturergbscale[i])
 477                                 {
 478                                         if (unit != i)
 479                                         {
 480                                                 qglActiveTexture(GL_TEXTURE0_ARB + (unit = i));
 481 CHECKGLERROR
 482                                         }
 483                                         glTexEnvf(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (texturergbscale[i] = mesh->texturergbscale[i]));
 484 CHECKGLERROR
 485                                 }
 486 //                              if (texture[i])
 487 //                                      topunit = i;
 488                         }
 489 //                      if (unit != topunit)
 490 //                      {
 491 //                              qglActiveTexture(GL_TEXTURE0_ARB + (unit = topunit));
 492 //CHECKGLERROR
 493 //                      }
 494                 }
 495                 else
 496                 {
 497                         if (texture[0] != mesh->textures[0])
 498                         {
 499                                 if (texture[0] == 0)
 500                                 {
 501                                         glEnable(GL_TEXTURE_2D);
 502 CHECKGLERROR
 503                                         glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 504 CHECKGLERROR
 505                                 }
 506                                 glBindTexture(GL_TEXTURE_2D, (texture[0] = mesh->textures[0]));
 507 CHECKGLERROR
 508                                 if (texture[0] == 0)
 509                                 {
 510                                         glDisable(GL_TEXTURE_2D);
 511 CHECKGLERROR
 512                                         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 513 CHECKGLERROR
 514                                 }
 515                         }
 516                 }
 517                 if (blendfunc1 != mesh->blendfunc1 || blendfunc2 != mesh->blendfunc2)
 518                 {
 519                         blendfunc1 = mesh->blendfunc1;
 520                         blendfunc2 = mesh->blendfunc2;
 521                         glBlendFunc(blendfunc1, blendfunc2);
 522 CHECKGLERROR
 523                         if (blendfunc2 == GL_ZERO)
 524                         {
 525                                 if (blendfunc1 == GL_ONE)
 526                                 {
 527                                         if (blend)
 528                                         {
 529                                                 blend = 0;
 530                                                 glDisable(GL_BLEND);
 531 CHECKGLERROR
 532                                         }
 533                                 }
 534                                 else
 535                                 {
 536                                         if (!blend)
 537                                         {
 538                                                 blend = 1;
 539                                                 glEnable(GL_BLEND);
 540 CHECKGLERROR
 541                                         }
 542                                 }
 543                         }
 544                         else
 545                         {
 546                                 if (!blend)
 547                                 {
 548                                         blend = 1;
 549                                         glEnable(GL_BLEND);
 550 CHECKGLERROR
 551                                 }
 552                         }
 553                 }
 554                 if (depthtest != mesh->depthtest)
 555                 {
 556                         depthtest = mesh->depthtest;
 557                         if (depthtest)
 558                                 glEnable(GL_DEPTH_TEST);
 559                         else
 560                                 glDisable(GL_DEPTH_TEST);
 561                 }
 562                 if (depthmask != mesh->depthmask)
 563                 {
 564                         depthmask = mesh->depthmask;
 565                         glDepthMask((GLboolean) depthmask);
 566 CHECKGLERROR
 567                 }
 568
 569                 firsttriangle = mesh->firsttriangle;
 570                 triangles = mesh->triangles;
 571                 firstvert = mesh->firstvert;
 572                 lastvert = mesh->lastvert;
 573                 mesh = &buf_mesh[++k];
 574
 575                 if (meshmerge)
 576                 {
 577                         #if MAX_TEXTUREUNITS != 4
 578                         #error update this code
 579                         #endif
 580                         while (k < currentmesh
 581                                 && mesh->blendfunc1 == blendfunc1
 582                                 && mesh->blendfunc2 == blendfunc2
 583                                 && mesh->depthtest == depthtest
 584                                 && mesh->depthmask == depthmask
 585                                 && mesh->textures[0] == texture[0]
 586                                 && mesh->textures[1] == texture[1]
 587                                 && mesh->textures[2] == texture[2]
 588                                 && mesh->textures[3] == texture[3]
 589                                 && mesh->texturergbscale[0] == texturergbscale[0]
 590                                 && mesh->texturergbscale[1] == texturergbscale[1]
 591                                 && mesh->texturergbscale[2] == texturergbscale[2]
 592                                 && mesh->texturergbscale[3] == texturergbscale[3])
 593                         {
 594                                 triangles += mesh->triangles;
 595                                 if (firstvert > mesh->firstvert)
 596                                         firstvert = mesh->firstvert;
 597                                 if (lastvert < mesh->lastvert)
 598                                         lastvert = mesh->lastvert;
 599                                 mesh = &buf_mesh[++k];
 600                         }
 601                 }
 602
 603 #ifdef WIN32
 604                 // FIXME: dynamic link to GL so we can get DrawRangeElements on WIN32
 605                 glDrawElements(GL_TRIANGLES, triangles * 3, GL_UNSIGNED_INT, (unsigned int *)&buf_tri[firsttriangle]);
 606 #else
 607                 glDrawRangeElements(GL_TRIANGLES, firstvert, lastvert + 1, triangles * 3, GL_UNSIGNED_INT, (unsigned int *)&buf_tri[firsttriangle]);
 608 #endif
 609 CHECKGLERROR
 610         }
 611
 612         currentmesh = 0;
 613         currenttriangle = 0;
 614         currentvertex = 0;
 615
 616         GL_UnlockArray();
 617 CHECKGLERROR
 618
 619         if (backendunits > 1)
 620         {
 621                 for (i = backendunits - 1;i >= 0;i--)
 622                 {
 623                         qglActiveTexture(GL_TEXTURE0_ARB + (unit = i));
 624 CHECKGLERROR
 625                         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 626 CHECKGLERROR
 627                         if (gl_combine.integer)
 628                         {
 629                                 glTexEnvf(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1.0f);
 630 CHECKGLERROR
 631                         }
 632                         if (i > 0)
 633                         {
 634                                 glDisable(GL_TEXTURE_2D);
 635 CHECKGLERROR
 636                         }
 637                         else
 638                         {
 639                                 glEnable(GL_TEXTURE_2D);
 640 CHECKGLERROR
 641                         }
 642                         glBindTexture(GL_TEXTURE_2D, 0);
 643 CHECKGLERROR
 644
 645                         qglClientActiveTexture(GL_TEXTURE0_ARB + (clientunit = i));
 646 CHECKGLERROR
 647                         glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 648 CHECKGLERROR
 649                 }
 650         }
 651         else
 652         {
 653                 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 654 CHECKGLERROR
 655                 glEnable(GL_TEXTURE_2D);
 656 CHECKGLERROR
 657                 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 658 CHECKGLERROR
 659         }
 660         glDisableClientState(GL_COLOR_ARRAY);
 661 CHECKGLERROR
 662         glDisableClientState(GL_VERTEX_ARRAY);
 663 CHECKGLERROR
 664
 665         glDisable(GL_BLEND);
 666 CHECKGLERROR
 667         glEnable(GL_DEPTH_TEST);
 668 CHECKGLERROR
 669         glDepthMask(true);
 670 CHECKGLERROR
 671         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 672 CHECKGLERROR
 673 }
 674
 675 void R_Mesh_AddTransparent(void)
 676 {
 677         int i, j, k;
 678         float viewdistcompare, centerscaler, dist1, dist2, dist3, center, maxdist;
 679         buf_vertex_t *vert1, *vert2, *vert3;
 680         buf_transtri_t *tri;
 681         buf_mesh_t *mesh;
 682
 683         // process and add transparent mesh triangles
 684         if (!currenttranstriangle)
 685                 return;
 686
 687         // map farclip to 0-4095 list range
 688         centerscaler = (TRANSDEPTHRES / r_farclip) * (1.0f / 3.0f);
 689         viewdistcompare = viewdist + 4.0f;
 690
 691         memset(buf_transtri_list, 0, TRANSDEPTHRES * sizeof(buf_transtri_t *));
 692
 693         // process in reverse because transtri_list adding code is in reverse as well
 694         k = 0;
 695         for (j = currenttranstriangle - 1;j >= 0;j--)
 696         {
 697                 tri = &buf_transtri[j];
 698
 699                 vert1 = &buf_transvertex[tri->index[0]];
 700                 vert2 = &buf_transvertex[tri->index[1]];
 701                 vert3 = &buf_transvertex[tri->index[2]];
 702
 703                 dist1 = DotProduct(vert1->v, vpn);
 704                 dist2 = DotProduct(vert2->v, vpn);
 705                 dist3 = DotProduct(vert3->v, vpn);
 706
 707                 maxdist = max(dist1, max(dist2, dist3));
 708                 if (maxdist < viewdistcompare)
 709                         continue;
 710
 711                 center = (dist1 + dist2 + dist3) * centerscaler - viewdist;
 712 #if SLOWMATH
 713                 i = (int) center;
 714                 i = bound(0, i, (TRANSDEPTHRES - 1));
 715 #else
 716                 if (center < 0.0f)
 717                         center = 0.0f;
 718                 center += 8388608.0f;
 719                 i = *((long *)&center) & 0x7FFFFF;
 720                 i = min(i, (TRANSDEPTHRES - 1));
 721 #endif
 722                 tri->next = buf_transtri_list[i];
 723                 buf_transtri_list[i] = tri;
 724                 k++;
 725         }
 726
 727         if (currentmesh + k > max_meshs || currenttriangle + k > max_batch || currentvertex + currenttransvertex > max_verts)
 728                 R_Mesh_Render();
 729
 730         // note: can't batch these because they can be rendered in any order
 731         // there can never be more transparent triangles than fit in main buffers
 732         memcpy(&buf_vertex[currentvertex], &buf_transvertex[0], currenttransvertex * sizeof(buf_vertex_t));
 733         if (floatcolors)
 734                 memcpy(&buf_fcolor[currentvertex], &buf_transfcolor[0], currenttransvertex * sizeof(buf_fcolor_t));
 735         else
 736                 memcpy(&buf_fcolor[currentvertex], &buf_transbcolor[0], currenttransvertex * sizeof(buf_bcolor_t));
 737         for (i = 0;i < backendunits;i++)
 738                 memcpy(&buf_texcoord[i][currentvertex], &buf_transtexcoord[i][0], currenttransvertex * sizeof(buf_texcoord_t));
 739
 740         for (j = TRANSDEPTHRES - 1;j >= 0;j--)
 741         {
 742                 if ((tri = buf_transtri_list[j]))
 743                 {
 744                         while(tri)
 745                         {
 746                                 mesh = &buf_mesh[currentmesh++];
 747                                 *mesh = *tri->mesh; // copy mesh properties
 748                                 buf_tri[currenttriangle].index[0] = tri->index[0] + currentvertex;
 749                                 buf_tri[currenttriangle].index[1] = tri->index[1] + currentvertex;
 750                                 buf_tri[currenttriangle].index[2] = tri->index[2] + currentvertex;
 751                                 mesh->firstvert = min(buf_tri[currenttriangle].index[0], min(buf_tri[currenttriangle].index[1], buf_tri[currenttriangle].index[2]));
 752                                 mesh->lastvert = max(buf_tri[currenttriangle].index[0], max(buf_tri[currenttriangle].index[1], buf_tri[currenttriangle].index[2]));
 753                                 mesh->firsttriangle = currenttriangle++;
 754                                 mesh->triangles = 1;
 755                                 tri = tri->next;
 756                         }
 757                 }
 758         }
 759         currentvertex += currenttransvertex;
 760         currenttransmesh = 0;
 761         currenttranstriangle = 0;
 762         currenttransvertex = 0;
 763 }
 764
 765 void R_Mesh_Draw(const rmeshinfo_t *m)
 766 {
 767         // these are static because gcc runs out of virtual registers otherwise
 768         static int i, j, *index, overbright;
 769         static float c, *in, scaler, cr, cg, cb, ca;
 770         static buf_mesh_t *mesh;
 771         static buf_vertex_t *vert;
 772         static buf_fcolor_t *fcolor;
 773         static buf_bcolor_t *bcolor;
 774         static buf_texcoord_t *texcoord[MAX_TEXTUREUNITS];
 775         static buf_transtri_t *tri;
 776         static byte br, bg, bb, ba;
 777
 778         if (m->index == NULL
 779          || !m->numtriangles
 780          || m->vertex == NULL
 781          || !m->numverts)
 782                 return;
 783         // ignore meaningless alpha meshs
 784         if (!m->depthwrite && m->blendfunc1 == GL_SRC_ALPHA && (m->blendfunc2 == GL_ONE || m->blendfunc2 == GL_ONE_MINUS_SRC_ALPHA))
 785         {
 786                 if (m->color)
 787                 {
 788                         for (i = 0, in = m->color + 3;i < m->numverts;i++, (int)in += m->colorstep)
 789                                 if (*in >= 0.01f)
 790                                         break;
 791                         if (i == m->numverts)
 792                                 return;
 793                 }
 794                 else if (m->ca < 0.01f)
 795                         return;
 796         }
 797
 798         if (!backendactive)
 799                 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
 800
 801         scaler = 1;
 802         if (m->blendfunc2 == GL_SRC_COLOR)
 803         {
 804                 if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer
 805                         scaler *= 0.5f;
 806         }
 807         else
 808         {
 809                 if (m->tex[0])
 810                 {
 811                         overbright = gl_combine.integer;
 812                         if (overbright)
 813                                 scaler *= 0.25f;
 814                 }
 815                 if (lighthalf)
 816                         scaler *= 0.5f;
 817         }
 818
 819         if (m->transparent)
 820         {
 821                 if (currenttransmesh >= max_meshs || (currenttranstriangle + m->numtriangles) > max_meshs || (currenttransvertex + m->numverts) > max_verts)
 822                 {
 823                         if (!transranout)
 824                         {
 825                                 Con_Printf("R_Mesh_Draw: ran out of room for transparent meshs\n");
 826                                 transranout = true;
 827                         }
 828                         return;
 829                 }
 830
 831                 vert = &buf_transvertex[currenttransvertex];
 832                 fcolor = &buf_transfcolor[currenttransvertex];
 833                 bcolor = &buf_transbcolor[currenttransvertex];
 834                 for (i = 0;i < backendunits;i++)
 835                         texcoord[i] = &buf_transtexcoord[i][currenttransvertex];
 836
 837                 // transmesh is only for storage of transparent meshs until they
 838                 // are inserted into the main mesh array
 839                 mesh = &buf_transmesh[currenttransmesh++];
 840                 mesh->blendfunc1 = m->blendfunc1;
 841                 mesh->blendfunc2 = m->blendfunc2;
 842                 mesh->depthmask = false;
 843                 mesh->depthtest = !m->depthdisable;
 844                 j = -1;
 845                 for (i = 0;i < backendunits;i++)
 846                 {
 847                         if ((mesh->textures[i] = m->tex[i]))
 848                                 j = i;
 849                         mesh->texturergbscale[i] = m->texrgbscale[i];
 850                         if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
 851                                 mesh->texturergbscale[i] = 1;
 852                 }
 853                 if (overbright && j >= 0)
 854                         mesh->texturergbscale[j] = 4;
 855
 856                 // transparent meshs are broken up into individual triangles which can
 857                 // be sorted by depth
 858                 index = m->index;
 859                 for (i = 0;i < m->numtriangles;i++)
 860                 {
 861                         tri = &buf_transtri[currenttranstriangle++];
 862                         tri->mesh = mesh;
 863                         tri->index[0] = *index++ + currenttransvertex;
 864                         tri->index[1] = *index++ + currenttransvertex;
 865                         tri->index[2] = *index++ + currenttransvertex;
 866                 }
 867
 868                 currenttransvertex += m->numverts;
 869         }
 870         else
 871         {
 872                 if (m->numtriangles > max_meshs || m->numverts > max_verts)
 873                 {
 874                         Con_Printf("R_Mesh_Draw: mesh too big for buffers\n");
 875                         return;
 876                 }
 877
 878                 if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
 879                         R_Mesh_Render();
 880
 881                 vert = &buf_vertex[currentvertex];
 882                 fcolor = &buf_fcolor[currentvertex];
 883                 bcolor = &buf_bcolor[currentvertex];
 884                 for (i = 0;i < backendunits;i++)
 885                         texcoord[i] = &buf_texcoord[i][currentvertex];
 886
 887                 mesh = &buf_mesh[currentmesh++];
 888                 mesh->blendfunc1 = m->blendfunc1;
 889                 mesh->blendfunc2 = m->blendfunc2;
 890                 mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
 891                 mesh->depthtest = !m->depthdisable;
 892                 mesh->firsttriangle = currenttriangle;
 893                 mesh->triangles = m->numtriangles;
 894                 j = -1;
 895                 for (i = 0;i < backendunits;i++)
 896                 {
 897                         if ((mesh->textures[i] = m->tex[i]))
 898                                 j = i;
 899                         mesh->texturergbscale[i] = m->texrgbscale[i];
 900                         if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
 901                                 mesh->texturergbscale[i] = 1;
 902                 }
 903                 if (overbright && j >= 0)
 904                         mesh->texturergbscale[j] = 4;
 905
 906                 // opaque meshs are rendered directly
 907                 index = (int *)&buf_tri[currenttriangle];
 908                 for (i = 0;i < m->numtriangles * 3;i++)
 909                         index[i] = m->index[i] + currentvertex;
 910                 mesh->firstvert = currentvertex;
 911                 currenttriangle += m->numtriangles;
 912                 currentvertex += m->numverts;
 913                 mesh->lastvert = currentvertex - 1;
 914         }
 915
 916         // vertex array code is shared for transparent and opaque meshs
 917
 918         c_meshtris += m->numtriangles;
 919
 920         if (m->vertexstep != sizeof(buf_vertex_t))
 921         {
 922                 for (i = 0, in = m->vertex;i < m->numverts;i++, (int)in += m->vertexstep)
 923                 {
 924                         vert[i].v[0] = in[0];
 925                         vert[i].v[1] = in[1];
 926                         vert[i].v[2] = in[2];
 927                         // push out farclip based on vertices encountered
 928                         c = DotProduct(vert[i].v, vpn);
 929                         if (meshfarclip < c)
 930                                 meshfarclip = c;
 931                 }
 932         }
 933         else
 934         {
 935                 memcpy(vert, m->vertex, m->numverts * sizeof(buf_vertex_t));
 936                 // push out farclip based on vertices encountered
 937                 for (i = 0;i < m->numverts;i++)
 938                 {
 939                         c = DotProduct(vert[i].v, vpn);
 940                         if (meshfarclip < c)
 941                                 meshfarclip = c;
 942                 }
 943         }
 944
 945         if (floatcolors)
 946         {
 947                 if (m->color)
 948                 {
 949                         for (i = 0, in = m->color;i < m->numverts;i++, (int)in += m->colorstep)
 950                         {
 951                                 fcolor[i].c[0] = in[0] * scaler;
 952                                 fcolor[i].c[1] = in[1] * scaler;
 953                                 fcolor[i].c[2] = in[2] * scaler;
 954                                 fcolor[i].c[3] = in[3];
 955                         }
 956                 }
 957                 else
 958                 {
 959                         cr = m->cr * scaler;
 960                         cg = m->cg * scaler;
 961                         cb = m->cb * scaler;
 962                         ca = m->ca;
 963                         for (i = 0;i < m->numverts;i++)
 964                         {
 965                                 fcolor[i].c[0] = cr;
 966                                 fcolor[i].c[1] = cg;
 967                                 fcolor[i].c[2] = cb;
 968                                 fcolor[i].c[3] = ca;
 969                         }
 970                 }
 971         }
 972         else
 973         {
 974                 if (m->color)
 975                 {
 976                         for (i = 0, in = m->color;i < m->numverts;i++, (int)in += m->colorstep)
 977                         {
 978                                 // shift float to have 8bit fraction at base of number,
 979                                 // then read as integer and kill float bits...
 980                                 c = in[0] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bcolor[i].c[0] = (byte) j;
 981                                 c = in[1] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bcolor[i].c[1] = (byte) j;
 982                                 c = in[2] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bcolor[i].c[2] = (byte) j;
 983                                 c = in[3]          + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bcolor[i].c[3] = (byte) j;
 984                         }
 985                 }
 986                 else
 987                 {
 988                         c = in[0] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;br = (byte) j;
 989                         c = in[1] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bg = (byte) j;
 990                         c = in[2] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bb = (byte) j;
 991                         c = in[3]          + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;ba = (byte) j;
 992                         for (i = 0;i < m->numverts;i++)
 993                         {
 994                                 bcolor[i].c[0] = br;
 995                                 bcolor[i].c[1] = bg;
 996                                 bcolor[i].c[2] = bb;
 997                                 bcolor[i].c[3] = ba;
 998                         }
 999                 }
1000         }
1001
1002         for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
1003         {
1004                 if (j >= backendunits)
1005                         Sys_Error("R_Mesh_Draw: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
1006                 if (m->texcoordstep[j] != sizeof(buf_texcoord_t))
1007                 {
1008                         for (i = 0, in = m->texcoords[j];i < m->numverts;i++, (int)in += m->texcoordstep[j])
1009                         {
1010                                 texcoord[j][i].t[0] = in[0];
1011                                 texcoord[j][i].t[1] = in[1];
1012                         }
1013                 }
1014                 else
1015                         memcpy(&texcoord[j][0].t[0], m->texcoords[j], m->numverts * sizeof(buf_texcoord_t));
1016         }
1017         #if 0
1018         for (;j < backendunits;j++)
1019                 memset(&texcoord[j][0].t[0], 0, m->numverts * sizeof(buf_texcoord_t));
1020         #endif
1021 }
1022
1023 void R_Mesh_DrawPolygon(rmeshinfo_t *m, int numverts)
1024 {
1025         m->index = polyindexarray;
1026         m->numverts = numverts;
1027         m->numtriangles = numverts - 2;
1028         if (m->numtriangles < 1)
1029         {
1030                 Con_Printf("R_Mesh_DrawPolygon: invalid vertex count\n");
1031                 return;
1032         }
1033         if (m->numtriangles >= 256)
1034         {
1035                 Con_Printf("R_Mesh_DrawPolygon: only up to 256 triangles (258 verts) supported\n");
1036                 return;
1037         }
1038         R_Mesh_Draw(m);
1039 }
1040
1041 // LordHavoc: this thing is evil, but necessary because decals account for so much overhead
1042 void R_Mesh_DrawDecal(const rmeshinfo_t *m)
1043 {
1044         // these are static because gcc runs out of virtual registers otherwise
1045         static int i, j, *index, overbright;
1046         static float c, *in, scaler, cr, cg, cb, ca;
1047         static buf_mesh_t *mesh;
1048         static buf_vertex_t *vert;
1049         static buf_fcolor_t *fcolor;
1050         static buf_bcolor_t *bcolor;
1051         static buf_texcoord_t *texcoord;
1052         static buf_transtri_t *tri;
1053         static byte br, bg, bb, ba;
1054
1055         if (!backendactive)
1056                 Sys_Error("R_Mesh_Draw: called when backend is not active\n");
1057
1058         scaler = 1;
1059         if (m->tex[0])
1060         {
1061                 overbright = gl_combine.integer;
1062                 if (overbright)
1063                         scaler *= 0.25f;
1064         }
1065         if (lighthalf)
1066                 scaler *= 0.5f;
1067
1068         if (m->transparent)
1069         {
1070                 if (currenttransmesh >= max_meshs || (currenttranstriangle + 2) > max_meshs || (currenttransvertex + 4) > max_verts)
1071                 {
1072                         if (!transranout)
1073                         {
1074                                 Con_Printf("R_Mesh_Draw: ran out of room for transparent meshs\n");
1075                                 transranout = true;
1076                         }
1077                         return;
1078                 }
1079
1080                 vert = &buf_transvertex[currenttransvertex];
1081                 fcolor = &buf_transfcolor[currenttransvertex];
1082                 bcolor = &buf_transbcolor[currenttransvertex];
1083                 texcoord = &buf_transtexcoord[0][currenttransvertex];
1084
1085                 // transmesh is only for storage of transparent meshs until they
1086                 // are inserted into the main mesh array
1087                 mesh = &buf_transmesh[currenttransmesh++];
1088                 mesh->blendfunc1 = m->blendfunc1;
1089                 mesh->blendfunc2 = m->blendfunc2;
1090                 mesh->depthmask = false;
1091                 mesh->depthtest = true;
1092                 mesh->textures[0] = m->tex[0];
1093                 mesh->texturergbscale[0] = overbright ? 4 : 1;
1094                 for (i = 1;i < backendunits;i++)
1095                 {
1096                         mesh->textures[i] = 0;
1097                         mesh->texturergbscale[i] = 1;
1098                 }
1099
1100                 // transparent meshs are broken up into individual triangles which can
1101                 // be sorted by depth
1102                 index = m->index;
1103                 tri = &buf_transtri[currenttranstriangle++];
1104                 tri->mesh = mesh;
1105                 tri->index[0] = 0 + currenttransvertex;
1106                 tri->index[1] = 1 + currenttransvertex;
1107                 tri->index[2] = 2 + currenttransvertex;
1108                 tri = &buf_transtri[currenttranstriangle++];
1109                 tri->mesh = mesh;
1110                 tri->index[0] = 0 + currenttransvertex;
1111                 tri->index[1] = 2 + currenttransvertex;
1112                 tri->index[2] = 3 + currenttransvertex;
1113
1114                 currenttransvertex += 4;
1115         }
1116         else
1117         {
1118                 if (2 > max_meshs || 4 > max_verts)
1119                 {
1120                         Con_Printf("R_Mesh_Draw: mesh too big for buffers\n");
1121                         return;
1122                 }
1123
1124                 if (currentmesh >= max_meshs || (currenttriangle + 2) > max_batch || (currentvertex + 4) > max_verts)
1125                         R_Mesh_Render();
1126
1127                 vert = &buf_vertex[currentvertex];
1128                 fcolor = &buf_fcolor[currentvertex];
1129                 bcolor = &buf_bcolor[currentvertex];
1130                 texcoord = &buf_texcoord[0][currentvertex];
1131
1132                 mesh = &buf_mesh[currentmesh++];
1133                 mesh->blendfunc1 = m->blendfunc1;
1134                 mesh->blendfunc2 = m->blendfunc2;
1135                 mesh->depthmask = false;
1136                 mesh->depthtest = !m->depthdisable;
1137                 mesh->firsttriangle = currenttriangle;
1138                 mesh->triangles = 2;
1139                 mesh->textures[0] = m->tex[0];
1140                 mesh->texturergbscale[0] = overbright ? 4 : 1;
1141                 for (i = 1;i < backendunits;i++)
1142                 {
1143                         mesh->textures[i] = 0;
1144                         mesh->texturergbscale[i] = 1;
1145                 }
1146
1147                 // opaque meshs are rendered directly
1148                 index = (int *)&buf_tri[currenttriangle];
1149                 index[0] = 0 + currentvertex;
1150                 index[1] = 1 + currentvertex;
1151                 index[2] = 2 + currentvertex;
1152                 index[3] = 0 + currentvertex;
1153                 index[4] = 2 + currentvertex;
1154                 index[5] = 3 + currentvertex;
1155                 mesh->firstvert = currentvertex;
1156                 currenttriangle += 2;
1157                 currentvertex += 4;
1158                 mesh->lastvert = currentvertex - 1;
1159         }
1160
1161         // vertex array code is shared for transparent and opaque meshs
1162
1163         c_meshtris += 2;
1164
1165         // buf_vertex_t must match the size of the decal vertex array (or vice versa)
1166         memcpy(vert, m->vertex, 4 * sizeof(buf_vertex_t));
1167         // push out farclip based on vertices encountered
1168         c = DotProduct(vert[0].v, vpn);if (meshfarclip < c) meshfarclip = c;
1169         c = DotProduct(vert[1].v, vpn);if (meshfarclip < c) meshfarclip = c;
1170         c = DotProduct(vert[2].v, vpn);if (meshfarclip < c) meshfarclip = c;
1171         c = DotProduct(vert[3].v, vpn);if (meshfarclip < c) meshfarclip = c;
1172
1173         if (floatcolors)
1174         {
1175                 cr = m->cr * scaler;
1176                 cg = m->cg * scaler;
1177                 cb = m->cb * scaler;
1178                 ca = m->ca;
1179                 fcolor[0].c[0] = cr;
1180                 fcolor[0].c[1] = cg;
1181                 fcolor[0].c[2] = cb;
1182                 fcolor[0].c[3] = ca;
1183                 fcolor[1].c[0] = cr;
1184                 fcolor[1].c[1] = cg;
1185                 fcolor[1].c[2] = cb;
1186                 fcolor[1].c[3] = ca;
1187                 fcolor[2].c[0] = cr;
1188                 fcolor[2].c[1] = cg;
1189                 fcolor[2].c[2] = cb;
1190                 fcolor[2].c[3] = ca;
1191                 fcolor[3].c[0] = cr;
1192                 fcolor[3].c[1] = cg;
1193                 fcolor[3].c[2] = cb;
1194                 fcolor[3].c[3] = ca;
1195         }
1196         else
1197         {
1198                 c = in[0] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;br = (byte) j;
1199                 c = in[1] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bg = (byte) j;
1200                 c = in[2] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bb = (byte) j;
1201                 c = in[3]          + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;ba = (byte) j;
1202                 bcolor[0].c[0] = br;
1203                 bcolor[0].c[1] = bg;
1204                 bcolor[0].c[2] = bb;
1205                 bcolor[0].c[3] = ba;
1206                 bcolor[1].c[0] = br;
1207                 bcolor[1].c[1] = bg;
1208                 bcolor[1].c[2] = bb;
1209                 bcolor[1].c[3] = ba;
1210                 bcolor[2].c[0] = br;
1211                 bcolor[2].c[1] = bg;
1212                 bcolor[2].c[2] = bb;
1213                 bcolor[2].c[3] = ba;
1214                 bcolor[3].c[0] = br;
1215                 bcolor[3].c[1] = bg;
1216                 bcolor[3].c[2] = bb;
1217                 bcolor[3].c[3] = ba;
1218         }
1219
1220         // buf_texcoord_t must be the same size as the decal texcoord array (or vice versa)
1221         memcpy(&texcoord[0].t[0], m->texcoords[0], 4 * sizeof(buf_texcoord_t));
1222 }