gl_rmain.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // r_main.c
  21
  22 #include "quakedef.h"
  23
  24 qboolean        r_cache_thrash;         // compatability
  25
  26 vec3_t          modelorg, r_entorigin;
  27 entity_t        *currententity;
  28
  29 int                     r_framecount;           // used for dlight push checking
  30
  31 mplane_t        frustum[4];
  32
  33 int                     c_brush_polys, c_alias_polys, c_light_polys, c_faces, c_nodes, c_leafs, c_models, c_bmodels, c_sprites, c_particles, c_dlights;
  34
  35 qboolean        envmap;                         // true during envmap command capture
  36
  37 // LordHavoc: moved all code related to particles into r_part.c
  38 //int                   particletexture;        // little dot for particles
  39 //int                   playertextures;         // up to 16 color translated skins
  40
  41 //
  42 // view origin
  43 //
  44 vec3_t  vup;
  45 vec3_t  vpn;
  46 vec3_t  vright;
  47 vec3_t  r_origin;
  48
  49 float   r_world_matrix[16];
  50 float   r_base_world_matrix[16];
  51
  52 //
  53 // screen size info
  54 //
  55 refdef_t        r_refdef;
  56
  57 mleaf_t         *r_viewleaf, *r_oldviewleaf;
  58
  59 unsigned short  d_lightstylevalue[256]; // 8.8 fraction of base light value
  60
  61 float ixtable[4096];
  62
  63 void R_MarkLeaves (void);
  64
  65 //cvar_t        r_norefresh = {0, "r_norefresh","0"};
  66 cvar_t  r_drawentities = {0, "r_drawentities","1"};
  67 cvar_t  r_drawviewmodel = {0, "r_drawviewmodel","1"};
  68 cvar_t  r_speeds = {0, "r_speeds","0"};
  69 cvar_t  r_speeds2 = {0, "r_speeds2","0"};
  70 cvar_t  r_fullbright = {0, "r_fullbright","0"};
  71 //cvar_t        r_lightmap = {0, "r_lightmap","0"};
  72 cvar_t  r_wateralpha = {CVAR_SAVE, "r_wateralpha","1"};
  73 cvar_t  r_dynamic = {CVAR_SAVE, "r_dynamic","1"};
  74 cvar_t  r_waterripple = {CVAR_SAVE, "r_waterripple","0"};
  75 cvar_t  r_fullbrights = {CVAR_SAVE, "r_fullbrights", "1"};
  76
  77 cvar_t  gl_lightmode = {CVAR_SAVE, "gl_lightmode", "1"}; // LordHavoc: overbright lighting
  78 //cvar_t        r_dynamicbothsides = {CVAR_SAVE, "r_dynamicbothsides", "1"}; // LordHavoc: can disable dynamic lighting of backfaces, but quake maps are weird so it doesn't always work right...
  79 cvar_t  r_farclip = {0, "r_farclip", "6144"}; // FIXME: make this go away (calculate based on farthest visible object/polygon)
  80
  81 cvar_t  gl_fogenable = {0, "gl_fogenable", "0"};
  82 cvar_t  gl_fogdensity = {0, "gl_fogdensity", "0.25"};
  83 cvar_t  gl_fogred = {0, "gl_fogred","0.3"};
  84 cvar_t  gl_foggreen = {0, "gl_foggreen","0.3"};
  85 cvar_t  gl_fogblue = {0, "gl_fogblue","0.3"};
  86 cvar_t  gl_fogstart = {0, "gl_fogstart", "0"};
  87 cvar_t  gl_fogend = {0, "gl_fogend","0"};
  88 cvar_t  glfog = {0, "glfog", "0"};
  89
  90 /*
  91 int R_VisibleCullBox (vec3_t mins, vec3_t maxs)
  92 {
  93         int sides;
  94         mnode_t *nodestack[8192], *node;
  95         int stack = 0;
  96
  97         node = cl.worldmodel->nodes;
  98 loc0:
  99         if (node->contents < 0)
 100         {
 101                 if (((mleaf_t *)node)->visframe == r_framecount)
 102                 {
 103                         if (R_CullBox(mins, maxs))
 104                                 return true;
 105                         return false;
 106                 }
 107                 if (!stack)
 108                         return true;
 109                 node = nodestack[--stack];
 110                 goto loc0;
 111         }
 112
 113         sides = BOX_ON_PLANE_SIDE(mins, maxs, node->plane);
 114
 115 // recurse down the contacted sides
 116         if (sides & 1)
 117         {
 118                 if (sides & 2) // 3
 119                 {
 120                         // put second child on the stack for later examination
 121                         nodestack[stack++] = node->children[1];
 122                         node = node->children[0];
 123                         goto loc0;
 124                 }
 125                 else // 1
 126                 {
 127                         node = node->children[0];
 128                         goto loc0;
 129                 }
 130         }
 131         // 2
 132         node = node->children[1];
 133         goto loc0;
 134 }
 135 */
 136
 137 qboolean lighthalf;
 138
 139 vec3_t fogcolor;
 140 vec_t fogdensity;
 141 float fog_density, fog_red, fog_green, fog_blue;
 142 qboolean fogenabled;
 143 qboolean oldgl_fogenable;
 144 void FOG_framebegin(void)
 145 {
 146         if (nehahra)
 147         {
 148 //              if (!Nehahrademcompatibility)
 149 //                      gl_fogenable.value = 0;
 150                 if (gl_fogenable.value)
 151                 {
 152                         oldgl_fogenable = true;
 153                         fog_density = gl_fogdensity.value;
 154                         fog_red = gl_fogred.value;
 155                         fog_green = gl_foggreen.value;
 156                         fog_blue = gl_fogblue.value;
 157                 }
 158                 else if (oldgl_fogenable)
 159                 {
 160                         oldgl_fogenable = false;
 161                         fog_density = 0;
 162                         fog_red = 0;
 163                         fog_green = 0;
 164                         fog_blue = 0;
 165                 }
 166         }
 167         if (fog_density)
 168         {
 169                         fogcolor[0] = fog_red   = bound(0.0f, fog_red  , 1.0f);
 170                         fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
 171                         fogcolor[2] = fog_blue  = bound(0.0f, fog_blue , 1.0f);
 172                         if (lighthalf)
 173                         {
 174                                 fogcolor[0] *= 0.5f;
 175                                 fogcolor[1] *= 0.5f;
 176                                 fogcolor[2] *= 0.5f;
 177                         }
 178         }
 179         if (glfog.value)
 180         {
 181                 if (!r_render.value)
 182                         return;
 183                 if(fog_density)
 184                 {
 185                         // LordHavoc: Borland C++ 5.0 was choking on this line, stupid compiler...
 186                         //GLfloat colors[4] = {(GLfloat) gl_fogred.value, (GLfloat) gl_foggreen.value, (GLfloat) gl_fogblue.value, (GLfloat) 1};
 187                         GLfloat colors[4];
 188                         colors[0] = fog_red;
 189                         colors[1] = fog_green;
 190                         colors[2] = fog_blue;
 191                         colors[3] = 1;
 192                         if (lighthalf)
 193                         {
 194                                 colors[0] *= 0.5f;
 195                                 colors[1] *= 0.5f;
 196                                 colors[2] *= 0.5f;
 197                         }
 198
 199                         glFogi (GL_FOG_MODE, GL_EXP2);
 200                         glFogf (GL_FOG_DENSITY, (GLfloat) fog_density / 100);
 201                         glFogfv (GL_FOG_COLOR, colors);
 202                         glEnable (GL_FOG);
 203                 }
 204                 else
 205                         glDisable(GL_FOG);
 206         }
 207         else
 208         {
 209                 if (fog_density)
 210                 {
 211                         fogenabled = true;
 212                         fogdensity = -4000.0f / (fog_density * fog_density);
 213                         // fog color was already set
 214                 }
 215                 else
 216                         fogenabled = false;
 217         }
 218 }
 219
 220 void FOG_frameend(void)
 221 {
 222         if (glfog.value)
 223                 glDisable(GL_FOG);
 224 }
 225
 226 void FOG_clear(void)
 227 {
 228         if (nehahra)
 229         {
 230                 Cvar_Set("gl_fogenable", "0");
 231                 Cvar_Set("gl_fogdensity", "0.2");
 232                 Cvar_Set("gl_fogred", "0.3");
 233                 Cvar_Set("gl_foggreen", "0.3");
 234                 Cvar_Set("gl_fogblue", "0.3");
 235         }
 236         fog_density = fog_red = fog_green = fog_blue = 0.0f;
 237 }
 238
 239 void FOG_registercvars(void)
 240 {
 241         Cvar_RegisterVariable (&glfog);
 242         if (nehahra)
 243         {
 244                 Cvar_RegisterVariable (&gl_fogenable);
 245                 Cvar_RegisterVariable (&gl_fogdensity);
 246                 Cvar_RegisterVariable (&gl_fogred);
 247                 Cvar_RegisterVariable (&gl_foggreen);
 248                 Cvar_RegisterVariable (&gl_fogblue);
 249                 Cvar_RegisterVariable (&gl_fogstart);
 250                 Cvar_RegisterVariable (&gl_fogend);
 251         }
 252 }
 253
 254 void gl_main_start(void)
 255 {
 256 }
 257
 258 void gl_main_shutdown(void)
 259 {
 260 }
 261
 262 void gl_main_newmap(void)
 263 {
 264 }
 265
 266 void GL_Main_Init(void)
 267 {
 268         int a;
 269         FOG_registercvars();
 270         // LordHavoc: setup 1.0f / N table for quick recipricols of integers
 271         ixtable[0] = 0;
 272         for (a = 1;a < 4096;a++)
 273                 ixtable[a] = 1.0f / a;
 274         Cvar_RegisterVariable (&r_drawentities);
 275         Cvar_RegisterVariable (&r_drawviewmodel);
 276         Cvar_RegisterVariable (&r_speeds);
 277         Cvar_RegisterVariable (&r_speeds2);
 278         Cvar_RegisterVariable (&gl_lightmode);
 279 //      Cvar_RegisterVariable (&r_dynamicwater);
 280 //      Cvar_RegisterVariable (&r_dynamicbothsides);
 281         Cvar_RegisterVariable (&r_fullbrights);
 282         Cvar_RegisterVariable (&r_wateralpha);
 283         Cvar_RegisterVariable (&r_dynamic);
 284         Cvar_RegisterVariable (&r_waterripple);
 285         Cvar_RegisterVariable (&r_farclip);
 286         if (nehahra)
 287                 Cvar_SetValue("r_fullbrights", 0);
 288 //      if (gl_vendor && strstr(gl_vendor, "3Dfx"))
 289 //              gl_lightmode.value = 0;
 290         Cvar_RegisterVariable (&r_fullbright);
 291         R_RegisterModule("GL_Main", gl_main_start, gl_main_shutdown, gl_main_newmap);
 292 }
 293
 294 extern void GL_Draw_Init(void);
 295 extern void GL_Main_Init(void);
 296 extern void GL_Models_Init(void);
 297 extern void GL_Poly_Init(void);
 298 extern void GL_Surf_Init(void);
 299 extern void GL_Screen_Init(void);
 300 extern void GL_Misc_Init(void);
 301 extern void R_Crosshairs_Init(void);
 302 extern void R_Light_Init(void);
 303 extern void R_Particles_Init(void);
 304 extern void R_Explosion_Init(void);
 305 extern void CL_Effects_Init(void);
 306 extern void R_Clip_Init(void);
 307 extern void ui_init(void);
 308
 309 void Render_Init(void)
 310 {
 311         R_Modules_Shutdown();
 312         R_Clip_Init();
 313         GL_Draw_Init();
 314         GL_Main_Init();
 315         GL_Models_Init();
 316         GL_Poly_Init();
 317         GL_Surf_Init();
 318         GL_Screen_Init();
 319         GL_Misc_Init();
 320         R_Crosshairs_Init();
 321         R_Light_Init();
 322         R_Particles_Init();
 323         R_Explosion_Init();
 324         CL_Effects_Init();
 325         R_Decals_Init();
 326         ui_init();
 327         R_Modules_Start();
 328 }
 329
 330 /*
 331 ===============
 332 GL_Init
 333 ===============
 334 */
 335 extern char *ENGINE_EXTENSIONS;
 336 void GL_Init (void)
 337 {
 338         gl_vendor = glGetString (GL_VENDOR);
 339         Con_Printf ("GL_VENDOR: %s\n", gl_vendor);
 340         gl_renderer = glGetString (GL_RENDERER);
 341         Con_Printf ("GL_RENDERER: %s\n", gl_renderer);
 342
 343         gl_version = glGetString (GL_VERSION);
 344         Con_Printf ("GL_VERSION: %s\n", gl_version);
 345         gl_extensions = glGetString (GL_EXTENSIONS);
 346         Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions);
 347
 348 //      Con_Printf ("%s %s\n", gl_renderer, gl_version);
 349
 350         VID_CheckMultitexture();
 351         VID_CheckCVA();
 352
 353         // LordHavoc: report supported extensions
 354         Con_Printf ("\nengine extensions: %s\n", ENGINE_EXTENSIONS);
 355
 356         glCullFace(GL_FRONT);
 357         glEnable(GL_TEXTURE_2D);
 358 //      glDisable(GL_ALPHA_TEST);
 359         glAlphaFunc(GL_GREATER, 0.5);
 360
 361 //      glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
 362 }
 363
 364
 365 /*
 366 void R_RotateForEntity (entity_t *e)
 367 {
 368         glTranslatef (e->origin[0],  e->origin[1],  e->origin[2]);
 369
 370         glRotatef (e->angles[1],  0, 0, 1);
 371         glRotatef (-e->angles[0],  0, 1, 0);
 372         glRotatef (e->angles[2],  1, 0, 0);
 373
 374         glScalef (e->scale, e->scale, e->scale); // LordHavoc: model scale
 375 }
 376 */
 377
 378 // LordHavoc: shading stuff
 379 vec3_t  shadevector;
 380 vec3_t  shadecolor;
 381
 382 float   modelalpha;
 383
 384 //==================================================================================
 385
 386 void R_LerpUpdate(entity_t *ent)
 387 {
 388         int frame;
 389         frame = ent->render.frame;
 390         if (ent->render.model && ent->render.frame >= ent->render.model->numframes)
 391         {
 392                 Con_Printf("R_LerpUpdate: no such frame%6i in \"%s\"\n", ent->render.frame, ent->render.model->name);
 393                 frame = 0;
 394         }
 395
 396         if (ent->render.lerp_model != ent->render.model)
 397         {
 398                 // reset all interpolation information
 399                 ent->render.lerp_model = ent->render.model;
 400                 ent->render.frame1 = ent->render.frame2 = frame;
 401                 ent->render.frame1start = ent->render.frame2start = cl.time;
 402                 ent->render.framelerp = 1;
 403                 ent->render.lerp_starttime = 0;
 404         }
 405         else if (ent->render.frame2 != frame)
 406         {
 407                 // transition to new frame
 408                 ent->render.frame1 = ent->render.frame2;
 409                 ent->render.frame1start = ent->render.frame2start;
 410                 ent->render.frame2 = frame;
 411                 ent->render.frame2start = cl.time;
 412                 ent->render.framelerp = 0;
 413                 ent->render.lerp_starttime = cl.time;
 414         }
 415         else
 416         {
 417                 // lerp_starttime < 0 is used to prevent changing of framelerp
 418                 if (ent->render.lerp_starttime >= 0)
 419                 {
 420                         // update transition
 421                         ent->render.framelerp = (cl.time - ent->render.lerp_starttime) * 10;
 422                         ent->render.framelerp = bound(0, ent->render.framelerp, 1);
 423                 }
 424         }
 425 }
 426
 427
 428 void R_PrepareEntities (void)
 429 {
 430         int i;
 431         entity_t *ent;
 432         vec3_t v;
 433         // this updates entities that are supposed to be view relative
 434         for (i = 0;i < cl_numvisedicts;i++)
 435         {
 436                 ent = cl_visedicts[i];
 437
 438                 if (ent->render.flags & RENDER_VIEWMODEL)
 439                 {
 440                         // remove flag so it will not be repeated incase RelinkEntities is not called again for a while
 441                         ent->render.flags -= RENDER_VIEWMODEL;
 442                         // transform origin
 443                         VectorCopy(ent->render.origin, v);
 444                         ent->render.origin[0] = v[0] * vpn[0] + v[1] * vright[0] + v[2] * vup[0] + r_origin[0];
 445                         ent->render.origin[1] = v[0] * vpn[1] + v[1] * vright[1] + v[2] * vup[1] + r_origin[1];
 446                         ent->render.origin[2] = v[0] * vpn[2] + v[1] * vright[2] + v[2] * vup[2] + r_origin[2];
 447                         // adjust angles
 448                         VectorAdd(ent->render.angles, r_refdef.viewangles, ent->render.angles);
 449                 }
 450         }
 451 }
 452
 453 void R_Entity_Callback(void *data, void *junk)
 454 {
 455         ((entity_t *)data)->render.visframe = r_framecount;
 456 }
 457
 458 void R_AddModelEntities (void)
 459 {
 460         int             i;
 461         vec3_t  mins, maxs;
 462         frameblend_t blend[4];
 463
 464         if (!r_drawentities.value)
 465                 return;
 466
 467         for (i = 0;i < cl_numvisedicts;i++)
 468         {
 469                 currententity = cl_visedicts[i];
 470                 if (currententity->render.model->type == mod_brush)
 471                 {
 472                         modelalpha = currententity->render.alpha;
 473                         R_DrawBrushModel (currententity);
 474                 }
 475                 else if (currententity->render.model->type == mod_alias)
 476                 {
 477                         VectorAdd(currententity->render.origin, currententity->render.model->mins, mins);
 478                         VectorAdd(currententity->render.origin, currententity->render.model->maxs, maxs);
 479                         R_Clip_AddBox(mins, maxs, R_Entity_Callback, currententity, NULL);
 480                 }
 481                 else if (currententity->render.model->type == mod_sprite)
 482                 {
 483                         R_LerpUpdate(currententity);
 484                         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 485                         R_ClipSprite(currententity, blend);
 486                 }
 487         }
 488 }
 489
 490 /*
 491 =============
 492 R_DrawEntitiesOnList
 493 =============
 494 */
 495 /*
 496 void R_DrawEntitiesOnList1 (void)
 497 {
 498         int             i;
 499
 500         if (!r_drawentities.value)
 501                 return;
 502
 503         for (i = 0;i < cl_numvisedicts;i++)
 504         {
 505                 if (cl_visedicts[i]->render.visframe != r_framecount)
 506                         continue;
 507                 if (cl_visedicts[i]->render.model->type != mod_brush)
 508                         continue;
 509                 currententity = cl_visedicts[i];
 510                 modelalpha = currententity->render.alpha;
 511
 512                 R_DrawBrushModel (currententity);
 513         }
 514 }
 515 */
 516
 517 void R_DrawModels (void)
 518 {
 519         int             i;
 520         frameblend_t blend[4];
 521 //      vec3_t  mins, maxs;
 522
 523         if (!r_drawentities.value)
 524                 return;
 525
 526         for (i = 0;i < cl_numvisedicts;i++)
 527         {
 528                 if (cl_visedicts[i]->render.visframe != r_framecount)
 529                         continue;
 530                 currententity = cl_visedicts[i];
 531                 if (currententity->render.model->type != mod_alias && currententity->render.model->type != mod_sprite)
 532                         continue;
 533
 534                 modelalpha = currententity->render.alpha;
 535
 536                 if (currententity->render.model->type == mod_alias)
 537                 {
 538                         // only lerp models here because sprites were already lerped for their clip polygon
 539                         R_LerpUpdate(currententity);
 540                         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 541                         R_DrawAliasModel (currententity, true, modelalpha, currententity->render.model, blend, currententity->render.skinnum, currententity->render.origin, currententity->render.angles, currententity->render.scale, currententity->render.effects, currententity->render.model->flags, currententity->render.colormap);
 542                 }
 543                 else //if (currententity->render.model->type == mod_sprite)
 544                 {
 545                         // build blend array
 546                         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 547                         R_DrawSpriteModel (currententity, blend);
 548                 }
 549
 550                 /*
 551                 VectorAdd(cl_visedicts[i]->render.origin, cl_visedicts[i]->render.model->mins, mins);
 552                 VectorAdd(cl_visedicts[i]->render.origin, cl_visedicts[i]->render.model->maxs, maxs);
 553
 554                 switch (cl_visedicts[i]->render.model->type)
 555                 {
 556                 case mod_alias:
 557                         R_Clip_AddBox(mins, maxs, R_DrawModelCallback, cl_visedicts[i], NULL);
 558                         break;
 559                 case mod_sprite:
 560                         R_Clip_AddBox(mins, maxs, R_DrawSpriteCallback, cl_visedicts[i], NULL);
 561                         break;
 562                 }
 563                 */
 564         }
 565 }
 566
 567 /*
 568 =============
 569 R_DrawViewModel
 570 =============
 571 */
 572 void R_DrawViewModel (void)
 573 {
 574         frameblend_t blend[4];
 575
 576         if (!r_drawviewmodel.value || chase_active.value || envmap || !r_drawentities.value || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.render.model)
 577                 return;
 578
 579         currententity = &cl.viewent;
 580         currententity->render.alpha = modelalpha = cl_entities[cl.viewentity].render.alpha; // LordHavoc: if the player is transparent, so is the gun
 581         currententity->render.effects = cl_entities[cl.viewentity].render.effects;
 582         currententity->render.scale = 1;
 583         VectorCopy(cl_entities[cl.viewentity].render.colormod, currententity->render.colormod);
 584
 585         R_LerpUpdate(currententity);
 586         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 587
 588         // hack the depth range to prevent view model from poking into walls
 589         glDepthRange (gldepthmin, gldepthmin + 0.3*(gldepthmax-gldepthmin));
 590         R_DrawAliasModel (currententity, false, modelalpha, currententity->render.model, blend, currententity->render.skinnum, currententity->render.origin, currententity->render.angles, currententity->render.scale, currententity->render.effects, currententity->render.model->flags, currententity->render.colormap);
 591         glDepthRange (gldepthmin, gldepthmax);
 592 }
 593
 594 void R_DrawBrushModel (entity_t *e);
 595
 596 void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees );
 597
 598 void R_SetFrustum (void)
 599 {
 600         int             i;
 601
 602         // LordHavoc: note to all quake engine coders, this code was making the
 603         // view frustum taller than it should have been (it assumed the view is
 604         // square; it is not square), so I disabled it
 605         /*
 606         if (r_refdef.fov_x == 90)
 607         {
 608                 // front side is visible
 609
 610                 VectorAdd (vpn, vright, frustum[0].normal);
 611                 VectorSubtract (vpn, vright, frustum[1].normal);
 612
 613                 VectorAdd (vpn, vup, frustum[2].normal);
 614                 VectorSubtract (vpn, vup, frustum[3].normal);
 615         }
 616         else
 617         {
 618         */
 619                 // rotate VPN right by FOV_X/2 degrees
 620                 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
 621                 // rotate VPN left by FOV_X/2 degrees
 622                 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
 623                 // rotate VPN up by FOV_X/2 degrees
 624                 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
 625                 // rotate VPN down by FOV_X/2 degrees
 626                 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
 627         //}
 628
 629         for (i=0 ; i<4 ; i++)
 630         {
 631                 frustum[i].type = PLANE_ANYZ;
 632                 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
 633 //              frustum[i].signbits = SignbitsForPlane (&frustum[i]);
 634                 PlaneClassify(&frustum[i]);
 635         }
 636 }
 637
 638 void R_AnimateLight (void);
 639 void V_CalcBlend (void);
 640
 641 /*
 642 ===============
 643 R_SetupFrame
 644 ===============
 645 */
 646 void R_SetupFrame (void)
 647 {
 648 // don't allow cheats in multiplayer
 649         if (cl.maxclients > 1)
 650         {
 651                 Cvar_Set ("r_fullbright", "0");
 652                 Cvar_Set ("r_ambient", "0");
 653         }
 654
 655         r_framecount++;
 656
 657 // build the transformation matrix for the given view angles
 658         VectorCopy (r_refdef.vieworg, r_origin);
 659
 660         AngleVectors (r_refdef.viewangles, vpn, vright, vup);
 661
 662 // current viewleaf
 663         r_oldviewleaf = r_viewleaf;
 664         r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
 665
 666         V_SetContentsColor (r_viewleaf->contents);
 667         V_CalcBlend ();
 668
 669         r_cache_thrash = false;
 670
 671         c_brush_polys = 0;
 672         c_alias_polys = 0;
 673         c_light_polys = 0;
 674         c_faces = 0;
 675         c_nodes = 0;
 676         c_leafs = 0;
 677         c_models = 0;
 678         c_bmodels = 0;
 679         c_sprites = 0;
 680         c_particles = 0;
 681 //      c_dlights = 0;
 682
 683         R_AnimateLight ();
 684 }
 685
 686
 687 void MYgluPerspective( GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar )
 688 {
 689    GLdouble xmin, xmax, ymin, ymax;
 690
 691    ymax = zNear * tan( fovy * M_PI / 360.0 );
 692    ymin = -ymax;
 693
 694    xmin = ymin * aspect;
 695    xmax = ymax * aspect;
 696
 697    glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
 698 }
 699
 700
 701 /*
 702 =============
 703 R_SetupGL
 704 =============
 705 */
 706 void R_SetupGL (void)
 707 {
 708         float   screenaspect;
 709         int             x, x2, y2, y, w, h;
 710
 711         if (!r_render.value)
 712                 return;
 713         //
 714         // set up viewpoint
 715         //
 716         glMatrixMode(GL_PROJECTION);
 717     glLoadIdentity ();
 718         x = r_refdef.vrect.x * glwidth/vid.width;
 719         x2 = (r_refdef.vrect.x + r_refdef.vrect.width) * glwidth/vid.width;
 720         y = (vid.height-r_refdef.vrect.y) * glheight/vid.height;
 721         y2 = (vid.height - (r_refdef.vrect.y + r_refdef.vrect.height)) * glheight/vid.height;
 722
 723         // fudge around because of frac screen scale
 724         if (x > 0)
 725                 x--;
 726         if (x2 < glwidth)
 727                 x2++;
 728         if (y2 < 0)
 729                 y2--;
 730         if (y < glheight)
 731                 y++;
 732
 733         w = x2 - x;
 734         h = y - y2;
 735
 736         if (envmap)
 737         {
 738                 x = y2 = 0;
 739                 w = h = 256;
 740         }
 741
 742         glViewport (glx + x, gly + y2, w, h);
 743     screenaspect = (float)r_refdef.vrect.width/r_refdef.vrect.height;
 744 //      yfov = 2*atan((float)r_refdef.vrect.height/r_refdef.vrect.width)*180/M_PI;
 745         MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  r_farclip.value);
 746
 747         glCullFace(GL_FRONT);
 748
 749         glMatrixMode(GL_MODELVIEW);
 750     glLoadIdentity ();
 751
 752     glRotatef (-90,  1, 0, 0);      // put Z going up
 753     glRotatef (90,  0, 0, 1);       // put Z going up
 754     glRotatef (-r_refdef.viewangles[2],  1, 0, 0);
 755     glRotatef (-r_refdef.viewangles[0],  0, 1, 0);
 756     glRotatef (-r_refdef.viewangles[1],  0, 0, 1);
 757     glTranslatef (-r_refdef.vieworg[0],  -r_refdef.vieworg[1],  -r_refdef.vieworg[2]);
 758
 759         glGetFloatv (GL_MODELVIEW_MATRIX, r_world_matrix);
 760
 761         //
 762         // set drawing parms
 763         //
 764 //      if (gl_cull.value)
 765                 glEnable(GL_CULL_FACE);
 766 //      else
 767 //              glDisable(GL_CULL_FACE);
 768
 769         glEnable(GL_BLEND); // was Disable
 770         glDisable(GL_ALPHA_TEST);
 771         glAlphaFunc(GL_GREATER, 0.5);
 772         glEnable(GL_DEPTH_TEST);
 773         glDepthMask(1);
 774         glShadeModel(GL_SMOOTH);
 775 }
 776
 777 /*
 778 =============
 779 R_Clear
 780 =============
 781 */
 782 void R_Clear (void)
 783 {
 784         if (!r_render.value)
 785                 return;
 786 //      glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // LordHavoc: moved to SCR_UpdateScreen
 787         gldepthmin = 0;
 788         gldepthmax = 1;
 789         glDepthFunc (GL_LEQUAL);
 790
 791         glDepthRange (gldepthmin, gldepthmax);
 792 }
 793
 794 // LordHavoc: my trick to *FIX* GLQuake lighting once and for all :)
 795 void GL_Brighten(void)
 796 {
 797         if (!r_render.value)
 798                 return;
 799         glMatrixMode(GL_PROJECTION);
 800     glLoadIdentity ();
 801         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 802         glMatrixMode(GL_MODELVIEW);
 803     glLoadIdentity ();
 804         glDisable (GL_DEPTH_TEST);
 805         glDisable (GL_CULL_FACE);
 806         glDisable(GL_TEXTURE_2D);
 807         glEnable(GL_BLEND);
 808         glBlendFunc (GL_DST_COLOR, GL_ONE);
 809         glBegin (GL_TRIANGLES);
 810         glColor3f (1, 1, 1);
 811         glVertex2f (-5000, -5000);
 812         glVertex2f (10000, -5000);
 813         glVertex2f (-5000, 10000);
 814         glEnd ();
 815         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 816         glDisable(GL_BLEND);
 817         glEnable(GL_TEXTURE_2D);
 818         glEnable (GL_DEPTH_TEST);
 819         glEnable (GL_CULL_FACE);
 820 }
 821
 822 void GL_BlendView(void)
 823 {
 824         if (!r_render.value)
 825                 return;
 826
 827         if (v_blend[3] < 0.01f)
 828                 return;
 829
 830         glMatrixMode(GL_PROJECTION);
 831     glLoadIdentity ();
 832         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 833         glMatrixMode(GL_MODELVIEW);
 834     glLoadIdentity ();
 835         glDisable (GL_DEPTH_TEST);
 836         glDisable (GL_CULL_FACE);
 837         glDisable(GL_TEXTURE_2D);
 838         glEnable(GL_BLEND);
 839         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 840         glBegin (GL_TRIANGLES);
 841         if (lighthalf)
 842                 glColor4f (v_blend[0] * 0.5f, v_blend[1] * 0.5f, v_blend[2] * 0.5f, v_blend[3]);
 843         else
 844                 glColor4fv (v_blend);
 845         glVertex2f (-5000, -5000);
 846         glVertex2f (10000, -5000);
 847         glVertex2f (-5000, 10000);
 848         glEnd ();
 849
 850         glEnable (GL_CULL_FACE);
 851         glEnable (GL_DEPTH_TEST);
 852         glDisable(GL_BLEND);
 853         glEnable(GL_TEXTURE_2D);
 854 }
 855
 856 /*
 857 ================
 858 R_RenderView
 859
 860 r_refdef must be set before the first call
 861 ================
 862 */
 863 extern void R_Sky(void);
 864 extern void UploadLightmaps(void);
 865 extern void R_DrawSurfaces(void);
 866 extern void R_DrawPortals(void);
 867 char r_speeds2_string[1024];
 868 int speedstringcount;
 869
 870 void timestring(int t, char *desc)
 871 {
 872         char tempbuf[256];
 873         int length;
 874         if (t < 1000000)
 875                 sprintf(tempbuf, " %6ius %s", t, desc);
 876         else
 877                 sprintf(tempbuf, " %6ims %s", t / 1000, desc);
 878         length = strlen(tempbuf);
 879 //      while (length < 20)
 880 //              tempbuf[length++] = ' ';
 881 //      tempbuf[length] = 0;
 882         if (speedstringcount + length > 80)
 883         {
 884                 strcat(r_speeds2_string, "\n");
 885                 speedstringcount = 0;
 886         }
 887         // skip the space at the beginning if it's the first on the line
 888         if (speedstringcount == 0)
 889         {
 890                 strcat(r_speeds2_string, tempbuf + 1);
 891                 speedstringcount = length - 1;
 892         }
 893         else
 894         {
 895                 strcat(r_speeds2_string, tempbuf);
 896                 speedstringcount += length;
 897         }
 898 }
 899
 900 #define TIMEREPORT(NAME) \
 901         if (r_speeds2.value)\
 902         {\
 903                 temptime = currtime;\
 904                 currtime = Sys_DoubleTime();\
 905                 timestring((int) ((currtime - temptime) * 1000000.0), NAME);\
 906         }
 907
 908 void R_RenderView (void)
 909 {
 910         double starttime, currtime, temptime;
 911 //      if (r_norefresh.value)
 912 //              return;
 913
 914         if (!cl.worldmodel)
 915                 Host_Error ("R_RenderView: NULL worldmodel");
 916
 917         if (r_speeds2.value)
 918         {
 919                 starttime = currtime = Sys_DoubleTime();
 920
 921                 speedstringcount = 0;
 922                 sprintf(r_speeds2_string, "org:'%c%6.2f %c%6.2f %c%6.2f' ang:'%c%3.0f %c%3.0f %c%3.0f' dir:'%c%2.3f %c%2.3f %c%2.3f'\n%6i walls %6i dlitwalls %7i modeltris %7i transpoly\nBSP: %6i faces %6i nodes %6i leafs\n%4i models %4i bmodels %4i sprites %5i particles %3i dlights\n",
 923                         r_origin[0] < 0 ? '-' : ' ', fabs(r_origin[0]), r_origin[1] < 0 ? '-' : ' ', fabs(r_origin[1]), r_origin[2] < 0 ? '-' : ' ', fabs(r_origin[2]), r_refdef.viewangles[0] < 0 ? '-' : ' ', fabs(r_refdef.viewangles[0]), r_refdef.viewangles[1] < 0 ? '-' : ' ', fabs(r_refdef.viewangles[1]), r_refdef.viewangles[2] < 0 ? '-' : ' ', fabs(r_refdef.viewangles[2]), vpn[0] < 0 ? '-' : ' ', fabs(vpn[0]), vpn[1] < 0 ? '-' : ' ', fabs(vpn[1]), vpn[2] < 0 ? '-' : ' ', fabs(vpn[2]),
 924                         c_brush_polys, c_light_polys, c_alias_polys, currenttranspoly,
 925                         c_faces, c_nodes, c_leafs,
 926                         c_models, c_bmodels, c_sprites, c_particles, c_dlights);
 927         }
 928         else
 929                 starttime = currtime = 0;
 930
 931         R_MoveParticles ();
 932         R_MoveExplosions();
 933
 934         lighthalf = gl_lightmode.value;
 935
 936         FOG_framebegin();
 937
 938         R_Clear();
 939         TIMEREPORT("clear     ")
 940
 941         // render normal view
 942
 943         R_SetupFrame ();
 944         R_SetFrustum ();
 945         R_SetupGL ();
 946         R_Clip_StartFrame();
 947
 948         R_PrepareEntities();
 949
 950         skypolyclear();
 951         wallpolyclear();
 952         transpolyclear();
 953
 954         TIMEREPORT("setup     ")
 955
 956         R_DrawWorld ();
 957         TIMEREPORT("world     ")
 958
 959         R_AddModelEntities();
 960         TIMEREPORT("addmodels")
 961
 962         R_Clip_EndFrame();
 963         TIMEREPORT("scanedge  ")
 964
 965         // now mark the lit surfaces
 966         R_PushDlights ();
 967         // yes this does add the world surfaces after the brush models
 968         R_DrawSurfaces ();
 969         R_DrawPortals ();
 970         TIMEREPORT("surfaces  ");
 971
 972         UploadLightmaps();
 973         TIMEREPORT("uploadlmap")
 974
 975         // fogged sky polys, affects depth
 976         skypolyrender();
 977
 978         // does not affect depth, draws over the sky polys
 979         if (currentskypoly)
 980                 R_Sky();
 981         TIMEREPORT("skypoly   ")
 982
 983         wallpolyrender();
 984         TIMEREPORT("wallpoly  ")
 985
 986         GL_DrawDecals();
 987         TIMEREPORT("ddecal    ")
 988
 989         // don't let sound skip if going slow
 990         if (!intimerefresh && !r_speeds2.value)
 991                 S_ExtraUpdate ();
 992
 993         R_DrawViewModel ();
 994         R_DrawModels ();
 995         TIMEREPORT("models    ")
 996
 997         R_DrawParticles ();
 998         TIMEREPORT("dparticles")
 999         R_DrawExplosions();
1000         TIMEREPORT("dexplosion")
1001
1002         transpolyrender();
1003         TIMEREPORT("transpoly ")
1004
1005         FOG_frameend();
1006
1007         GL_BlendView();
1008         TIMEREPORT("blend     ")
1009
1010         if (r_speeds2.value)
1011                 timestring((int) ((Sys_DoubleTime() - starttime) * 1000000.0), "total    ");
1012 }