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