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 void R_MarkLeaves (void);
  62
  63 //cvar_t        r_norefresh = {0, "r_norefresh","0"};
  64 cvar_t  r_drawentities = {0, "r_drawentities","1"};
  65 cvar_t  r_drawviewmodel = {0, "r_drawviewmodel","1"};
  66 cvar_t  r_speeds = {0, "r_speeds","0"};
  67 cvar_t  r_speeds2 = {0, "r_speeds2","0"};
  68 cvar_t  r_fullbright = {0, "r_fullbright","0"};
  69 //cvar_t        r_lightmap = {0, "r_lightmap","0"};
  70 cvar_t  r_wateralpha = {CVAR_SAVE, "r_wateralpha","1"};
  71 cvar_t  r_dynamic = {CVAR_SAVE, "r_dynamic","1"};
  72 cvar_t  r_waterripple = {CVAR_SAVE, "r_waterripple","0"};
  73 cvar_t  r_fullbrights = {CVAR_SAVE, "r_fullbrights", "1"};
  74
  75 cvar_t  gl_lightmode = {CVAR_SAVE, "gl_lightmode", "1"}; // LordHavoc: overbright lighting
  76 //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...
  77 cvar_t  r_farclip = {0, "r_farclip", "6144"}; // FIXME: make this go away (calculate based on farthest visible object/polygon)
  78
  79 cvar_t  gl_fogenable = {0, "gl_fogenable", "0"};
  80 cvar_t  gl_fogdensity = {0, "gl_fogdensity", "0.25"};
  81 cvar_t  gl_fogred = {0, "gl_fogred","0.3"};
  82 cvar_t  gl_foggreen = {0, "gl_foggreen","0.3"};
  83 cvar_t  gl_fogblue = {0, "gl_fogblue","0.3"};
  84 cvar_t  gl_fogstart = {0, "gl_fogstart", "0"};
  85 cvar_t  gl_fogend = {0, "gl_fogend","0"};
  86 cvar_t  glfog = {0, "glfog", "0"};
  87
  88 cvar_t  r_ser = {CVAR_SAVE, "r_ser", "1"};
  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         FOG_registercvars();
 269         Cvar_RegisterVariable (&r_drawentities);
 270         Cvar_RegisterVariable (&r_drawviewmodel);
 271         Cvar_RegisterVariable (&r_speeds);
 272         Cvar_RegisterVariable (&r_speeds2);
 273         Cvar_RegisterVariable (&gl_lightmode);
 274 //      Cvar_RegisterVariable (&r_dynamicwater);
 275 //      Cvar_RegisterVariable (&r_dynamicbothsides);
 276         Cvar_RegisterVariable (&r_fullbrights);
 277         Cvar_RegisterVariable (&r_wateralpha);
 278         Cvar_RegisterVariable (&r_dynamic);
 279         Cvar_RegisterVariable (&r_waterripple);
 280         Cvar_RegisterVariable (&r_farclip);
 281         if (nehahra)
 282                 Cvar_SetValue("r_fullbrights", 0);
 283 //      if (gl_vendor && strstr(gl_vendor, "3Dfx"))
 284 //              gl_lightmode.value = 0;
 285         Cvar_RegisterVariable (&r_fullbright);
 286         Cvar_RegisterVariable (&r_ser);
 287         R_RegisterModule("GL_Main", gl_main_start, gl_main_shutdown, gl_main_newmap);
 288 }
 289
 290 extern void GL_Draw_Init(void);
 291 extern void GL_Main_Init(void);
 292 extern void GL_Models_Init(void);
 293 extern void GL_Poly_Init(void);
 294 extern void GL_Surf_Init(void);
 295 extern void GL_Screen_Init(void);
 296 extern void GL_Misc_Init(void);
 297 extern void R_Crosshairs_Init(void);
 298 extern void R_Light_Init(void);
 299 extern void R_Particles_Init(void);
 300 extern void R_Explosion_Init(void);
 301 extern void CL_Effects_Init(void);
 302 extern void R_Clip_Init(void);
 303 extern void ui_init(void);
 304
 305 void Render_Init(void)
 306 {
 307         R_Modules_Shutdown();
 308         R_Clip_Init();
 309         GL_Draw_Init();
 310         GL_Main_Init();
 311         GL_Models_Init();
 312         GL_Poly_Init();
 313         GL_Surf_Init();
 314         GL_Screen_Init();
 315         GL_Misc_Init();
 316         R_Crosshairs_Init();
 317         R_Light_Init();
 318         R_Particles_Init();
 319         R_Explosion_Init();
 320         CL_Effects_Init();
 321         R_Decals_Init();
 322         ui_init();
 323         R_Modules_Start();
 324 }
 325
 326 /*
 327 ===============
 328 GL_Init
 329 ===============
 330 */
 331 extern char *ENGINE_EXTENSIONS;
 332 void GL_Init (void)
 333 {
 334         gl_vendor = glGetString (GL_VENDOR);
 335         Con_Printf ("GL_VENDOR: %s\n", gl_vendor);
 336         gl_renderer = glGetString (GL_RENDERER);
 337         Con_Printf ("GL_RENDERER: %s\n", gl_renderer);
 338
 339         gl_version = glGetString (GL_VERSION);
 340         Con_Printf ("GL_VERSION: %s\n", gl_version);
 341         gl_extensions = glGetString (GL_EXTENSIONS);
 342         Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions);
 343
 344 //      Con_Printf ("%s %s\n", gl_renderer, gl_version);
 345
 346 //      VID_CheckMultitexture();
 347 //      VID_CheckCVA();
 348 //      VID_CheckCombine();
 349         VID_CheckExtensions();
 350
 351         // LordHavoc: report supported extensions
 352         Con_Printf ("\nengine extensions: %s\n", ENGINE_EXTENSIONS);
 353
 354         glCullFace(GL_FRONT);
 355         glEnable(GL_TEXTURE_2D);
 356 //      glDisable(GL_ALPHA_TEST);
 357         glAlphaFunc(GL_GREATER, 0.5);
 358
 359 //      glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
 360 }
 361
 362
 363 /*
 364 void R_RotateForEntity (entity_t *e)
 365 {
 366         glTranslatef (e->origin[0],  e->origin[1],  e->origin[2]);
 367
 368         glRotatef (e->angles[1],  0, 0, 1);
 369         glRotatef (-e->angles[0],  0, 1, 0);
 370         glRotatef (e->angles[2],  1, 0, 0);
 371
 372         glScalef (e->scale, e->scale, e->scale); // LordHavoc: model scale
 373 }
 374 */
 375
 376 // LordHavoc: shading stuff
 377 vec3_t  shadevector;
 378 vec3_t  shadecolor;
 379
 380 float   modelalpha;
 381
 382 //==================================================================================
 383
 384 void R_LerpUpdate(entity_t *ent)
 385 {
 386         int frame;
 387         frame = ent->render.frame;
 388         if (ent->render.model && ent->render.frame >= ent->render.model->numframes)
 389         {
 390                 Con_Printf("R_LerpUpdate: no such frame%6i in \"%s\"\n", ent->render.frame, ent->render.model->name);
 391                 frame = 0;
 392         }
 393
 394         if (ent->render.lerp_model != ent->render.model)
 395         {
 396                 // reset all interpolation information
 397                 ent->render.lerp_model = ent->render.model;
 398                 ent->render.frame1 = ent->render.frame2 = frame;
 399                 ent->render.frame1start = ent->render.frame2start = cl.time;
 400                 ent->render.framelerp = 1;
 401                 ent->render.lerp_starttime = 0;
 402         }
 403         else if (ent->render.frame2 != frame)
 404         {
 405                 // transition to new frame
 406                 ent->render.frame1 = ent->render.frame2;
 407                 ent->render.frame1start = ent->render.frame2start;
 408                 ent->render.frame2 = frame;
 409                 ent->render.frame2start = cl.time;
 410                 ent->render.framelerp = 0;
 411                 ent->render.lerp_starttime = cl.time;
 412         }
 413         else
 414         {
 415                 // lerp_starttime < 0 is used to prevent changing of framelerp
 416                 if (ent->render.lerp_starttime >= 0)
 417                 {
 418                         // update transition
 419                         ent->render.framelerp = (cl.time - ent->render.lerp_starttime) * 10;
 420                         ent->render.framelerp = bound(0, ent->render.framelerp, 1);
 421                 }
 422         }
 423 }
 424
 425
 426 void R_PrepareEntities (void)
 427 {
 428         int i;
 429         entity_t *ent;
 430         vec3_t v;
 431         // this updates entities that are supposed to be view relative
 432         for (i = 0;i < cl_numvisedicts;i++)
 433         {
 434                 ent = cl_visedicts[i];
 435
 436                 if (ent->render.flags & RENDER_VIEWMODEL)
 437                 {
 438                         // remove flag so it will not be repeated incase RelinkEntities is not called again for a while
 439                         ent->render.flags -= RENDER_VIEWMODEL;
 440                         // transform origin
 441                         VectorCopy(ent->render.origin, v);
 442                         ent->render.origin[0] = v[0] * vpn[0] + v[1] * vright[0] + v[2] * vup[0] + r_origin[0];
 443                         ent->render.origin[1] = v[0] * vpn[1] + v[1] * vright[1] + v[2] * vup[1] + r_origin[1];
 444                         ent->render.origin[2] = v[0] * vpn[2] + v[1] * vright[2] + v[2] * vup[2] + r_origin[2];
 445                         // adjust angles
 446                         VectorAdd(ent->render.angles, r_refdef.viewangles, ent->render.angles);
 447                 }
 448         }
 449 }
 450
 451 void R_Entity_Callback(void *data, void *junk)
 452 {
 453         ((entity_t *)data)->render.visframe = r_framecount;
 454 }
 455
 456 void R_AddModelEntities (void)
 457 {
 458         int             i;
 459         vec3_t  mins, maxs;
 460         frameblend_t blend[4];
 461
 462         if (!r_drawentities.value)
 463                 return;
 464
 465         for (i = 0;i < cl_numvisedicts;i++)
 466         {
 467                 currententity = cl_visedicts[i];
 468                 if (currententity->render.model->type == mod_brush)
 469                 {
 470                         modelalpha = currententity->render.alpha;
 471                         R_DrawBrushModel (currententity);
 472                 }
 473                 else if (currententity->render.model->type == mod_alias)
 474                 {
 475                         VectorAdd(currententity->render.origin, currententity->render.model->mins, mins);
 476                         VectorAdd(currententity->render.origin, currententity->render.model->maxs, maxs);
 477                         if (r_ser.value)
 478                                 R_Clip_AddBox(mins, maxs, R_Entity_Callback, currententity, NULL);
 479                         else if (R_NotCulledBox(mins, maxs))
 480                                 currententity->render.visframe = r_framecount;
 481                 }
 482                 else if (currententity->render.model->type == mod_sprite)
 483                 {
 484                         R_LerpUpdate(currententity);
 485                         if (r_ser.value)
 486                         {
 487                                 R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 488                                 R_ClipSprite(currententity, blend);
 489                         }
 490                         else
 491                         {
 492                                 VectorAdd(currententity->render.origin, currententity->render.model->mins, mins);
 493                                 VectorAdd(currententity->render.origin, currententity->render.model->maxs, maxs);
 494                                 if (R_NotCulledBox(mins, maxs))
 495                                         currententity->render.visframe = r_framecount;
 496                         }
 497                 }
 498         }
 499 }
 500
 501 /*
 502 =============
 503 R_DrawEntitiesOnList
 504 =============
 505 */
 506 /*
 507 void R_DrawEntitiesOnList1 (void)
 508 {
 509         int             i;
 510
 511         if (!r_drawentities.value)
 512                 return;
 513
 514         for (i = 0;i < cl_numvisedicts;i++)
 515         {
 516                 if (cl_visedicts[i]->render.visframe != r_framecount)
 517                         continue;
 518                 if (cl_visedicts[i]->render.model->type != mod_brush)
 519                         continue;
 520                 currententity = cl_visedicts[i];
 521                 modelalpha = currententity->render.alpha;
 522
 523                 R_DrawBrushModel (currententity);
 524         }
 525 }
 526 */
 527
 528 void R_DrawModels (void)
 529 {
 530         int             i;
 531         frameblend_t blend[4];
 532 //      vec3_t  mins, maxs;
 533
 534         if (!r_drawentities.value)
 535                 return;
 536
 537         for (i = 0;i < cl_numvisedicts;i++)
 538         {
 539                 if (cl_visedicts[i]->render.visframe != r_framecount)
 540                         continue;
 541                 currententity = cl_visedicts[i];
 542                 if (currententity->render.model->type != mod_alias && currententity->render.model->type != mod_sprite)
 543                         continue;
 544
 545                 modelalpha = currententity->render.alpha;
 546
 547                 if (currententity->render.model->type == mod_alias)
 548                 {
 549                         // only lerp models here because sprites were already lerped for their clip polygon
 550                         R_LerpUpdate(currententity);
 551                         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 552                         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);
 553                 }
 554                 else //if (currententity->render.model->type == mod_sprite)
 555                 {
 556                         // build blend array
 557                         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 558                         R_DrawSpriteModel (currententity, blend);
 559                 }
 560
 561                 /*
 562                 VectorAdd(cl_visedicts[i]->render.origin, cl_visedicts[i]->render.model->mins, mins);
 563                 VectorAdd(cl_visedicts[i]->render.origin, cl_visedicts[i]->render.model->maxs, maxs);
 564
 565                 switch (cl_visedicts[i]->render.model->type)
 566                 {
 567                 case mod_alias:
 568                         R_Clip_AddBox(mins, maxs, R_DrawModelCallback, cl_visedicts[i], NULL);
 569                         break;
 570                 case mod_sprite:
 571                         R_Clip_AddBox(mins, maxs, R_DrawSpriteCallback, cl_visedicts[i], NULL);
 572                         break;
 573                 }
 574                 */
 575         }
 576 }
 577
 578 /*
 579 =============
 580 R_DrawViewModel
 581 =============
 582 */
 583 void R_DrawViewModel (void)
 584 {
 585         frameblend_t blend[4];
 586
 587         if (!r_drawviewmodel.value || chase_active.value || envmap || !r_drawentities.value || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.render.model)
 588                 return;
 589
 590         currententity = &cl.viewent;
 591         currententity->render.alpha = modelalpha = cl_entities[cl.viewentity].render.alpha; // LordHavoc: if the player is transparent, so is the gun
 592         currententity->render.effects = cl_entities[cl.viewentity].render.effects;
 593         currententity->render.scale = 1;
 594         VectorCopy(cl_entities[cl.viewentity].render.colormod, currententity->render.colormod);
 595
 596         R_LerpUpdate(currententity);
 597         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 598
 599         // hack the depth range to prevent view model from poking into walls
 600         glDepthRange (gldepthmin, gldepthmin + 0.3*(gldepthmax-gldepthmin));
 601         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);
 602         glDepthRange (gldepthmin, gldepthmax);
 603 }
 604
 605 void R_DrawBrushModel (entity_t *e);
 606
 607 void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees );
 608
 609 void R_SetFrustum (void)
 610 {
 611         int             i;
 612
 613         // LordHavoc: note to all quake engine coders, this code was making the
 614         // view frustum taller than it should have been (it assumed the view is
 615         // square; it is not square), so I disabled it
 616         /*
 617         if (r_refdef.fov_x == 90)
 618         {
 619                 // front side is visible
 620
 621                 VectorAdd (vpn, vright, frustum[0].normal);
 622                 VectorSubtract (vpn, vright, frustum[1].normal);
 623
 624                 VectorAdd (vpn, vup, frustum[2].normal);
 625                 VectorSubtract (vpn, vup, frustum[3].normal);
 626         }
 627         else
 628         {
 629         */
 630                 // rotate VPN right by FOV_X/2 degrees
 631                 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
 632                 // rotate VPN left by FOV_X/2 degrees
 633                 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
 634                 // rotate VPN up by FOV_X/2 degrees
 635                 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
 636                 // rotate VPN down by FOV_X/2 degrees
 637                 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
 638         //}
 639
 640         for (i=0 ; i<4 ; i++)
 641         {
 642                 frustum[i].type = PLANE_ANYZ;
 643                 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
 644 //              frustum[i].signbits = SignbitsForPlane (&frustum[i]);
 645                 PlaneClassify(&frustum[i]);
 646         }
 647 }
 648
 649 void R_AnimateLight (void);
 650 void V_CalcBlend (void);
 651
 652 /*
 653 ===============
 654 R_SetupFrame
 655 ===============
 656 */
 657 void R_SetupFrame (void)
 658 {
 659 // don't allow cheats in multiplayer
 660         if (cl.maxclients > 1)
 661         {
 662                 Cvar_Set ("r_fullbright", "0");
 663                 Cvar_Set ("r_ambient", "0");
 664         }
 665
 666         r_framecount++;
 667
 668 // build the transformation matrix for the given view angles
 669         VectorCopy (r_refdef.vieworg, r_origin);
 670
 671         AngleVectors (r_refdef.viewangles, vpn, vright, vup);
 672
 673 // current viewleaf
 674         r_oldviewleaf = r_viewleaf;
 675         r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
 676
 677         V_SetContentsColor (r_viewleaf->contents);
 678         V_CalcBlend ();
 679
 680         r_cache_thrash = false;
 681
 682         c_brush_polys = 0;
 683         c_alias_polys = 0;
 684         c_light_polys = 0;
 685         c_faces = 0;
 686         c_nodes = 0;
 687         c_leafs = 0;
 688         c_models = 0;
 689         c_bmodels = 0;
 690         c_sprites = 0;
 691         c_particles = 0;
 692 //      c_dlights = 0;
 693
 694         R_AnimateLight ();
 695 }
 696
 697
 698 void MYgluPerspective( GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar )
 699 {
 700    GLdouble xmin, xmax, ymin, ymax;
 701
 702    ymax = zNear * tan( fovy * M_PI / 360.0 );
 703    ymin = -ymax;
 704
 705    xmin = ymin * aspect;
 706    xmax = ymax * aspect;
 707
 708    glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
 709 }
 710
 711
 712 /*
 713 =============
 714 R_SetupGL
 715 =============
 716 */
 717 void R_SetupGL (void)
 718 {
 719         float   screenaspect;
 720         int             x, x2, y2, y, w, h;
 721
 722         if (!r_render.value)
 723                 return;
 724         //
 725         // set up viewpoint
 726         //
 727         glMatrixMode(GL_PROJECTION);
 728     glLoadIdentity ();
 729         x = r_refdef.vrect.x * glwidth/vid.width;
 730         x2 = (r_refdef.vrect.x + r_refdef.vrect.width) * glwidth/vid.width;
 731         y = (vid.height-r_refdef.vrect.y) * glheight/vid.height;
 732         y2 = (vid.height - (r_refdef.vrect.y + r_refdef.vrect.height)) * glheight/vid.height;
 733
 734         // fudge around because of frac screen scale
 735         if (x > 0)
 736                 x--;
 737         if (x2 < glwidth)
 738                 x2++;
 739         if (y2 < 0)
 740                 y2--;
 741         if (y < glheight)
 742                 y++;
 743
 744         w = x2 - x;
 745         h = y - y2;
 746
 747         if (envmap)
 748         {
 749                 x = y2 = 0;
 750                 w = h = 256;
 751         }
 752
 753         glViewport (glx + x, gly + y2, w, h);
 754     screenaspect = (float)r_refdef.vrect.width/r_refdef.vrect.height;
 755 //      yfov = 2*atan((float)r_refdef.vrect.height/r_refdef.vrect.width)*180/M_PI;
 756         MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  r_farclip.value);
 757
 758         glCullFace(GL_FRONT);
 759
 760         glMatrixMode(GL_MODELVIEW);
 761     glLoadIdentity ();
 762
 763     glRotatef (-90,  1, 0, 0);      // put Z going up
 764     glRotatef (90,  0, 0, 1);       // put Z going up
 765     glRotatef (-r_refdef.viewangles[2],  1, 0, 0);
 766     glRotatef (-r_refdef.viewangles[0],  0, 1, 0);
 767     glRotatef (-r_refdef.viewangles[1],  0, 0, 1);
 768     glTranslatef (-r_refdef.vieworg[0],  -r_refdef.vieworg[1],  -r_refdef.vieworg[2]);
 769
 770         glGetFloatv (GL_MODELVIEW_MATRIX, r_world_matrix);
 771
 772         //
 773         // set drawing parms
 774         //
 775 //      if (gl_cull.value)
 776                 glEnable(GL_CULL_FACE);
 777 //      else
 778 //              glDisable(GL_CULL_FACE);
 779
 780         glEnable(GL_BLEND); // was Disable
 781         glDisable(GL_ALPHA_TEST);
 782         glAlphaFunc(GL_GREATER, 0.5);
 783         glEnable(GL_DEPTH_TEST);
 784         glDepthMask(1);
 785         glShadeModel(GL_SMOOTH);
 786 }
 787
 788 /*
 789 =============
 790 R_Clear
 791 =============
 792 */
 793 void R_Clear (void)
 794 {
 795         if (!r_render.value)
 796                 return;
 797 //      glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // LordHavoc: moved to SCR_UpdateScreen
 798         gldepthmin = 0;
 799         gldepthmax = 1;
 800         glDepthFunc (GL_LEQUAL);
 801
 802         glDepthRange (gldepthmin, gldepthmax);
 803 }
 804
 805 // LordHavoc: my trick to *FIX* GLQuake lighting once and for all :)
 806 void GL_Brighten(void)
 807 {
 808         if (!r_render.value)
 809                 return;
 810         glMatrixMode(GL_PROJECTION);
 811     glLoadIdentity ();
 812         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 813         glMatrixMode(GL_MODELVIEW);
 814     glLoadIdentity ();
 815         glDisable (GL_DEPTH_TEST);
 816         glDisable (GL_CULL_FACE);
 817         glDisable(GL_TEXTURE_2D);
 818         glEnable(GL_BLEND);
 819         glBlendFunc (GL_DST_COLOR, GL_ONE);
 820         glBegin (GL_TRIANGLES);
 821         glColor3f (1, 1, 1);
 822         glVertex2f (-5000, -5000);
 823         glVertex2f (10000, -5000);
 824         glVertex2f (-5000, 10000);
 825         glEnd ();
 826         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 827         glDisable(GL_BLEND);
 828         glEnable(GL_TEXTURE_2D);
 829         glEnable (GL_DEPTH_TEST);
 830         glEnable (GL_CULL_FACE);
 831 }
 832
 833 void GL_BlendView(void)
 834 {
 835         if (!r_render.value)
 836                 return;
 837
 838         if (v_blend[3] < 0.01f)
 839                 return;
 840
 841         glMatrixMode(GL_PROJECTION);
 842     glLoadIdentity ();
 843         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 844         glMatrixMode(GL_MODELVIEW);
 845     glLoadIdentity ();
 846         glDisable (GL_DEPTH_TEST);
 847         glDisable (GL_CULL_FACE);
 848         glDisable(GL_TEXTURE_2D);
 849         glEnable(GL_BLEND);
 850         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 851         glBegin (GL_TRIANGLES);
 852         if (lighthalf)
 853                 glColor4f (v_blend[0] * 0.5f, v_blend[1] * 0.5f, v_blend[2] * 0.5f, v_blend[3]);
 854         else
 855                 glColor4fv (v_blend);
 856         glVertex2f (-5000, -5000);
 857         glVertex2f (10000, -5000);
 858         glVertex2f (-5000, 10000);
 859         glEnd ();
 860
 861         glEnable (GL_CULL_FACE);
 862         glEnable (GL_DEPTH_TEST);
 863         glDisable(GL_BLEND);
 864         glEnable(GL_TEXTURE_2D);
 865 }
 866
 867 /*
 868 ================
 869 R_RenderView
 870
 871 r_refdef must be set before the first call
 872 ================
 873 */
 874 extern void R_Sky(void);
 875 extern void UploadLightmaps(void);
 876 extern void R_DrawSurfaces(void);
 877 extern void R_DrawPortals(void);
 878 char r_speeds2_string[1024];
 879 int speedstringcount;
 880
 881 void timestring(int t, char *desc)
 882 {
 883         char tempbuf[256];
 884         int length;
 885         if (t < 1000000)
 886                 sprintf(tempbuf, " %6ius %s", t, desc);
 887         else
 888                 sprintf(tempbuf, " %6ims %s", t / 1000, desc);
 889         length = strlen(tempbuf);
 890 //      while (length < 20)
 891 //              tempbuf[length++] = ' ';
 892 //      tempbuf[length] = 0;
 893         if (speedstringcount + length > 80)
 894         {
 895                 strcat(r_speeds2_string, "\n");
 896                 speedstringcount = 0;
 897         }
 898         // skip the space at the beginning if it's the first on the line
 899         if (speedstringcount == 0)
 900         {
 901                 strcat(r_speeds2_string, tempbuf + 1);
 902                 speedstringcount = length - 1;
 903         }
 904         else
 905         {
 906                 strcat(r_speeds2_string, tempbuf);
 907                 speedstringcount += length;
 908         }
 909 }
 910
 911 #define TIMEREPORT(NAME) \
 912         if (r_speeds2.value)\
 913         {\
 914                 temptime = currtime;\
 915                 currtime = Sys_DoubleTime();\
 916                 timestring((int) ((currtime - temptime) * 1000000.0), NAME);\
 917         }
 918
 919 void R_RenderView (void)
 920 {
 921         double starttime, currtime, temptime;
 922 //      if (r_norefresh.value)
 923 //              return;
 924
 925         if (!cl.worldmodel)
 926                 Host_Error ("R_RenderView: NULL worldmodel");
 927
 928         if (r_speeds2.value)
 929         {
 930                 starttime = currtime = Sys_DoubleTime();
 931
 932                 speedstringcount = 0;
 933                 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",
 934                         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]),
 935                         c_brush_polys, c_light_polys, c_alias_polys, currenttranspoly,
 936                         c_faces, c_nodes, c_leafs,
 937                         c_models, c_bmodels, c_sprites, c_particles, c_dlights);
 938         }
 939         else
 940                 starttime = currtime = 0;
 941
 942         R_MoveParticles ();
 943         R_MoveExplosions();
 944
 945         FOG_framebegin();
 946
 947         R_Clear();
 948         TIMEREPORT("clear     ")
 949
 950         // render normal view
 951
 952         R_SetupFrame ();
 953         R_SetFrustum ();
 954         R_SetupGL ();
 955         R_Clip_StartFrame();
 956
 957         R_PrepareEntities();
 958
 959         skypolyclear();
 960         wallpolyclear();
 961         transpolyclear();
 962
 963         TIMEREPORT("setup     ")
 964
 965         R_DrawWorld ();
 966         TIMEREPORT("world     ")
 967
 968         R_AddModelEntities();
 969         TIMEREPORT("addmodels")
 970
 971         R_Clip_EndFrame();
 972         TIMEREPORT("scanedge  ")
 973
 974         // now mark the lit surfaces
 975         R_PushDlights ();
 976         // yes this does add the world surfaces after the brush models
 977         R_DrawSurfaces ();
 978         R_DrawPortals ();
 979         TIMEREPORT("surfaces  ");
 980
 981         UploadLightmaps();
 982         TIMEREPORT("uploadlmap")
 983
 984         // fogged sky polys, affects depth
 985         skypolyrender();
 986
 987         // does not affect depth, draws over the sky polys
 988         if (currentskypoly)
 989                 R_Sky();
 990         TIMEREPORT("skypoly   ")
 991
 992         wallpolyrender();
 993         TIMEREPORT("wallpoly  ")
 994
 995         GL_DrawDecals();
 996         TIMEREPORT("ddecal    ")
 997
 998         // don't let sound skip if going slow
 999         if (!intimerefresh && !r_speeds2.value)
1000                 S_ExtraUpdate ();
1001
1002         R_DrawViewModel ();
1003         R_DrawModels ();
1004         TIMEREPORT("models    ")
1005
1006         R_DrawParticles ();
1007         TIMEREPORT("dparticles")
1008         R_DrawExplosions();
1009         TIMEREPORT("dexplosion")
1010
1011         transpolyrender();
1012         TIMEREPORT("transpoly ")
1013
1014         FOG_frameend();
1015
1016         GL_BlendView();
1017         TIMEREPORT("blend     ")
1018
1019         if (r_speeds2.value)
1020                 timestring((int) ((Sys_DoubleTime() - starttime) * 1000000.0), "total    ");
1021 }