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
 349         // LordHavoc: report supported extensions
 350         Con_Printf ("\nengine extensions: %s\n", ENGINE_EXTENSIONS);
 351
 352         glCullFace(GL_FRONT);
 353         glEnable(GL_TEXTURE_2D);
 354 //      glDisable(GL_ALPHA_TEST);
 355         glAlphaFunc(GL_GREATER, 0.5);
 356
 357 //      glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
 358 }
 359
 360
 361 /*
 362 void R_RotateForEntity (entity_t *e)
 363 {
 364         glTranslatef (e->origin[0],  e->origin[1],  e->origin[2]);
 365
 366         glRotatef (e->angles[1],  0, 0, 1);
 367         glRotatef (-e->angles[0],  0, 1, 0);
 368         glRotatef (e->angles[2],  1, 0, 0);
 369
 370         glScalef (e->scale, e->scale, e->scale); // LordHavoc: model scale
 371 }
 372 */
 373
 374 // LordHavoc: shading stuff
 375 vec3_t  shadevector;
 376 vec3_t  shadecolor;
 377
 378 float   modelalpha;
 379
 380 //==================================================================================
 381
 382 void R_LerpUpdate(entity_t *ent)
 383 {
 384         int frame;
 385         frame = ent->render.frame;
 386         if (ent->render.model && ent->render.frame >= ent->render.model->numframes)
 387         {
 388                 Con_Printf("R_LerpUpdate: no such frame%6i in \"%s\"\n", ent->render.frame, ent->render.model->name);
 389                 frame = 0;
 390         }
 391
 392         if (ent->render.lerp_model != ent->render.model)
 393         {
 394                 // reset all interpolation information
 395                 ent->render.lerp_model = ent->render.model;
 396                 ent->render.frame1 = ent->render.frame2 = frame;
 397                 ent->render.frame1start = ent->render.frame2start = cl.time;
 398                 ent->render.framelerp = 1;
 399                 ent->render.lerp_starttime = 0;
 400         }
 401         else if (ent->render.frame2 != frame)
 402         {
 403                 // transition to new frame
 404                 ent->render.frame1 = ent->render.frame2;
 405                 ent->render.frame1start = ent->render.frame2start;
 406                 ent->render.frame2 = frame;
 407                 ent->render.frame2start = cl.time;
 408                 ent->render.framelerp = 0;
 409                 ent->render.lerp_starttime = cl.time;
 410         }
 411         else
 412         {
 413                 // lerp_starttime < 0 is used to prevent changing of framelerp
 414                 if (ent->render.lerp_starttime >= 0)
 415                 {
 416                         // update transition
 417                         ent->render.framelerp = (cl.time - ent->render.lerp_starttime) * 10;
 418                         ent->render.framelerp = bound(0, ent->render.framelerp, 1);
 419                 }
 420         }
 421 }
 422
 423
 424 void R_PrepareEntities (void)
 425 {
 426         int i;
 427         entity_t *ent;
 428         vec3_t v;
 429         // this updates entities that are supposed to be view relative
 430         for (i = 0;i < cl_numvisedicts;i++)
 431         {
 432                 ent = cl_visedicts[i];
 433
 434                 if (ent->render.flags & RENDER_VIEWMODEL)
 435                 {
 436                         // remove flag so it will not be repeated incase RelinkEntities is not called again for a while
 437                         ent->render.flags -= RENDER_VIEWMODEL;
 438                         // transform origin
 439                         VectorCopy(ent->render.origin, v);
 440                         ent->render.origin[0] = v[0] * vpn[0] + v[1] * vright[0] + v[2] * vup[0] + r_origin[0];
 441                         ent->render.origin[1] = v[0] * vpn[1] + v[1] * vright[1] + v[2] * vup[1] + r_origin[1];
 442                         ent->render.origin[2] = v[0] * vpn[2] + v[1] * vright[2] + v[2] * vup[2] + r_origin[2];
 443                         // adjust angles
 444                         VectorAdd(ent->render.angles, r_refdef.viewangles, ent->render.angles);
 445                 }
 446         }
 447 }
 448
 449 void R_Entity_Callback(void *data, void *junk)
 450 {
 451         ((entity_t *)data)->render.visframe = r_framecount;
 452 }
 453
 454 void R_AddModelEntities (void)
 455 {
 456         int             i;
 457         vec3_t  mins, maxs;
 458         frameblend_t blend[4];
 459
 460         if (!r_drawentities.value)
 461                 return;
 462
 463         for (i = 0;i < cl_numvisedicts;i++)
 464         {
 465                 currententity = cl_visedicts[i];
 466                 if (currententity->render.model->type == mod_brush)
 467                 {
 468                         modelalpha = currententity->render.alpha;
 469                         R_DrawBrushModel (currententity);
 470                 }
 471                 else if (currententity->render.model->type == mod_alias)
 472                 {
 473                         VectorAdd(currententity->render.origin, currententity->render.model->mins, mins);
 474                         VectorAdd(currententity->render.origin, currententity->render.model->maxs, maxs);
 475                         if (r_ser.value)
 476                                 R_Clip_AddBox(mins, maxs, R_Entity_Callback, currententity, NULL);
 477                         else if (R_NotCulledBox(mins, maxs))
 478                                 currententity->render.visframe = r_framecount;
 479                 }
 480                 else if (currententity->render.model->type == mod_sprite)
 481                 {
 482                         R_LerpUpdate(currententity);
 483                         if (r_ser.value)
 484                         {
 485                                 R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 486                                 R_ClipSprite(currententity, blend);
 487                         }
 488                         else
 489                         {
 490                                 VectorAdd(currententity->render.origin, currententity->render.model->mins, mins);
 491                                 VectorAdd(currententity->render.origin, currententity->render.model->maxs, maxs);
 492                                 if (R_NotCulledBox(mins, maxs))
 493                                         currententity->render.visframe = r_framecount;
 494                         }
 495                 }
 496         }
 497 }
 498
 499 /*
 500 =============
 501 R_DrawEntitiesOnList
 502 =============
 503 */
 504 /*
 505 void R_DrawEntitiesOnList1 (void)
 506 {
 507         int             i;
 508
 509         if (!r_drawentities.value)
 510                 return;
 511
 512         for (i = 0;i < cl_numvisedicts;i++)
 513         {
 514                 if (cl_visedicts[i]->render.visframe != r_framecount)
 515                         continue;
 516                 if (cl_visedicts[i]->render.model->type != mod_brush)
 517                         continue;
 518                 currententity = cl_visedicts[i];
 519                 modelalpha = currententity->render.alpha;
 520
 521                 R_DrawBrushModel (currententity);
 522         }
 523 }
 524 */
 525
 526 void R_DrawModels (void)
 527 {
 528         int             i;
 529         frameblend_t blend[4];
 530 //      vec3_t  mins, maxs;
 531
 532         if (!r_drawentities.value)
 533                 return;
 534
 535         for (i = 0;i < cl_numvisedicts;i++)
 536         {
 537                 if (cl_visedicts[i]->render.visframe != r_framecount)
 538                         continue;
 539                 currententity = cl_visedicts[i];
 540                 if (currententity->render.model->type != mod_alias && currententity->render.model->type != mod_sprite)
 541                         continue;
 542
 543                 modelalpha = currententity->render.alpha;
 544
 545                 if (currententity->render.model->type == mod_alias)
 546                 {
 547                         // only lerp models here because sprites were already lerped for their clip polygon
 548                         R_LerpUpdate(currententity);
 549                         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 550                         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);
 551                 }
 552                 else //if (currententity->render.model->type == mod_sprite)
 553                 {
 554                         // build blend array
 555                         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 556                         R_DrawSpriteModel (currententity, blend);
 557                 }
 558
 559                 /*
 560                 VectorAdd(cl_visedicts[i]->render.origin, cl_visedicts[i]->render.model->mins, mins);
 561                 VectorAdd(cl_visedicts[i]->render.origin, cl_visedicts[i]->render.model->maxs, maxs);
 562
 563                 switch (cl_visedicts[i]->render.model->type)
 564                 {
 565                 case mod_alias:
 566                         R_Clip_AddBox(mins, maxs, R_DrawModelCallback, cl_visedicts[i], NULL);
 567                         break;
 568                 case mod_sprite:
 569                         R_Clip_AddBox(mins, maxs, R_DrawSpriteCallback, cl_visedicts[i], NULL);
 570                         break;
 571                 }
 572                 */
 573         }
 574 }
 575
 576 /*
 577 =============
 578 R_DrawViewModel
 579 =============
 580 */
 581 void R_DrawViewModel (void)
 582 {
 583         frameblend_t blend[4];
 584
 585         if (!r_drawviewmodel.value || chase_active.value || envmap || !r_drawentities.value || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.render.model)
 586                 return;
 587
 588         currententity = &cl.viewent;
 589         currententity->render.alpha = modelalpha = cl_entities[cl.viewentity].render.alpha; // LordHavoc: if the player is transparent, so is the gun
 590         currententity->render.effects = cl_entities[cl.viewentity].render.effects;
 591         currententity->render.scale = 1;
 592         VectorCopy(cl_entities[cl.viewentity].render.colormod, currententity->render.colormod);
 593
 594         R_LerpUpdate(currententity);
 595         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 596
 597         // hack the depth range to prevent view model from poking into walls
 598         glDepthRange (gldepthmin, gldepthmin + 0.3*(gldepthmax-gldepthmin));
 599         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);
 600         glDepthRange (gldepthmin, gldepthmax);
 601 }
 602
 603 void R_DrawBrushModel (entity_t *e);
 604
 605 void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees );
 606
 607 void R_SetFrustum (void)
 608 {
 609         int             i;
 610
 611         // LordHavoc: note to all quake engine coders, this code was making the
 612         // view frustum taller than it should have been (it assumed the view is
 613         // square; it is not square), so I disabled it
 614         /*
 615         if (r_refdef.fov_x == 90)
 616         {
 617                 // front side is visible
 618
 619                 VectorAdd (vpn, vright, frustum[0].normal);
 620                 VectorSubtract (vpn, vright, frustum[1].normal);
 621
 622                 VectorAdd (vpn, vup, frustum[2].normal);
 623                 VectorSubtract (vpn, vup, frustum[3].normal);
 624         }
 625         else
 626         {
 627         */
 628                 // rotate VPN right by FOV_X/2 degrees
 629                 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
 630                 // rotate VPN left by FOV_X/2 degrees
 631                 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
 632                 // rotate VPN up by FOV_X/2 degrees
 633                 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
 634                 // rotate VPN down by FOV_X/2 degrees
 635                 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
 636         //}
 637
 638         for (i=0 ; i<4 ; i++)
 639         {
 640                 frustum[i].type = PLANE_ANYZ;
 641                 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
 642 //              frustum[i].signbits = SignbitsForPlane (&frustum[i]);
 643                 PlaneClassify(&frustum[i]);
 644         }
 645 }
 646
 647 void R_AnimateLight (void);
 648 void V_CalcBlend (void);
 649
 650 /*
 651 ===============
 652 R_SetupFrame
 653 ===============
 654 */
 655 void R_SetupFrame (void)
 656 {
 657 // don't allow cheats in multiplayer
 658         if (cl.maxclients > 1)
 659         {
 660                 Cvar_Set ("r_fullbright", "0");
 661                 Cvar_Set ("r_ambient", "0");
 662         }
 663
 664         r_framecount++;
 665
 666 // build the transformation matrix for the given view angles
 667         VectorCopy (r_refdef.vieworg, r_origin);
 668
 669         AngleVectors (r_refdef.viewangles, vpn, vright, vup);
 670
 671 // current viewleaf
 672         r_oldviewleaf = r_viewleaf;
 673         r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
 674
 675         V_SetContentsColor (r_viewleaf->contents);
 676         V_CalcBlend ();
 677
 678         r_cache_thrash = false;
 679
 680         c_brush_polys = 0;
 681         c_alias_polys = 0;
 682         c_light_polys = 0;
 683         c_faces = 0;
 684         c_nodes = 0;
 685         c_leafs = 0;
 686         c_models = 0;
 687         c_bmodels = 0;
 688         c_sprites = 0;
 689         c_particles = 0;
 690 //      c_dlights = 0;
 691
 692         R_AnimateLight ();
 693 }
 694
 695
 696 void MYgluPerspective( GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar )
 697 {
 698    GLdouble xmin, xmax, ymin, ymax;
 699
 700    ymax = zNear * tan( fovy * M_PI / 360.0 );
 701    ymin = -ymax;
 702
 703    xmin = ymin * aspect;
 704    xmax = ymax * aspect;
 705
 706    glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
 707 }
 708
 709
 710 /*
 711 =============
 712 R_SetupGL
 713 =============
 714 */
 715 void R_SetupGL (void)
 716 {
 717         float   screenaspect;
 718         int             x, x2, y2, y, w, h;
 719
 720         if (!r_render.value)
 721                 return;
 722         //
 723         // set up viewpoint
 724         //
 725         glMatrixMode(GL_PROJECTION);
 726     glLoadIdentity ();
 727         x = r_refdef.vrect.x * glwidth/vid.width;
 728         x2 = (r_refdef.vrect.x + r_refdef.vrect.width) * glwidth/vid.width;
 729         y = (vid.height-r_refdef.vrect.y) * glheight/vid.height;
 730         y2 = (vid.height - (r_refdef.vrect.y + r_refdef.vrect.height)) * glheight/vid.height;
 731
 732         // fudge around because of frac screen scale
 733         if (x > 0)
 734                 x--;
 735         if (x2 < glwidth)
 736                 x2++;
 737         if (y2 < 0)
 738                 y2--;
 739         if (y < glheight)
 740                 y++;
 741
 742         w = x2 - x;
 743         h = y - y2;
 744
 745         if (envmap)
 746         {
 747                 x = y2 = 0;
 748                 w = h = 256;
 749         }
 750
 751         glViewport (glx + x, gly + y2, w, h);
 752     screenaspect = (float)r_refdef.vrect.width/r_refdef.vrect.height;
 753 //      yfov = 2*atan((float)r_refdef.vrect.height/r_refdef.vrect.width)*180/M_PI;
 754         MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  r_farclip.value);
 755
 756         glCullFace(GL_FRONT);
 757
 758         glMatrixMode(GL_MODELVIEW);
 759     glLoadIdentity ();
 760
 761     glRotatef (-90,  1, 0, 0);      // put Z going up
 762     glRotatef (90,  0, 0, 1);       // put Z going up
 763     glRotatef (-r_refdef.viewangles[2],  1, 0, 0);
 764     glRotatef (-r_refdef.viewangles[0],  0, 1, 0);
 765     glRotatef (-r_refdef.viewangles[1],  0, 0, 1);
 766     glTranslatef (-r_refdef.vieworg[0],  -r_refdef.vieworg[1],  -r_refdef.vieworg[2]);
 767
 768         glGetFloatv (GL_MODELVIEW_MATRIX, r_world_matrix);
 769
 770         //
 771         // set drawing parms
 772         //
 773 //      if (gl_cull.value)
 774                 glEnable(GL_CULL_FACE);
 775 //      else
 776 //              glDisable(GL_CULL_FACE);
 777
 778         glEnable(GL_BLEND); // was Disable
 779         glDisable(GL_ALPHA_TEST);
 780         glAlphaFunc(GL_GREATER, 0.5);
 781         glEnable(GL_DEPTH_TEST);
 782         glDepthMask(1);
 783         glShadeModel(GL_SMOOTH);
 784 }
 785
 786 /*
 787 =============
 788 R_Clear
 789 =============
 790 */
 791 void R_Clear (void)
 792 {
 793         if (!r_render.value)
 794                 return;
 795 //      glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // LordHavoc: moved to SCR_UpdateScreen
 796         gldepthmin = 0;
 797         gldepthmax = 1;
 798         glDepthFunc (GL_LEQUAL);
 799
 800         glDepthRange (gldepthmin, gldepthmax);
 801 }
 802
 803 // LordHavoc: my trick to *FIX* GLQuake lighting once and for all :)
 804 void GL_Brighten(void)
 805 {
 806         if (!r_render.value)
 807                 return;
 808         glMatrixMode(GL_PROJECTION);
 809     glLoadIdentity ();
 810         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 811         glMatrixMode(GL_MODELVIEW);
 812     glLoadIdentity ();
 813         glDisable (GL_DEPTH_TEST);
 814         glDisable (GL_CULL_FACE);
 815         glDisable(GL_TEXTURE_2D);
 816         glEnable(GL_BLEND);
 817         glBlendFunc (GL_DST_COLOR, GL_ONE);
 818         glBegin (GL_TRIANGLES);
 819         glColor3f (1, 1, 1);
 820         glVertex2f (-5000, -5000);
 821         glVertex2f (10000, -5000);
 822         glVertex2f (-5000, 10000);
 823         glEnd ();
 824         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 825         glDisable(GL_BLEND);
 826         glEnable(GL_TEXTURE_2D);
 827         glEnable (GL_DEPTH_TEST);
 828         glEnable (GL_CULL_FACE);
 829 }
 830
 831 void GL_BlendView(void)
 832 {
 833         if (!r_render.value)
 834                 return;
 835
 836         if (v_blend[3] < 0.01f)
 837                 return;
 838
 839         glMatrixMode(GL_PROJECTION);
 840     glLoadIdentity ();
 841         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 842         glMatrixMode(GL_MODELVIEW);
 843     glLoadIdentity ();
 844         glDisable (GL_DEPTH_TEST);
 845         glDisable (GL_CULL_FACE);
 846         glDisable(GL_TEXTURE_2D);
 847         glEnable(GL_BLEND);
 848         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 849         glBegin (GL_TRIANGLES);
 850         if (lighthalf)
 851                 glColor4f (v_blend[0] * 0.5f, v_blend[1] * 0.5f, v_blend[2] * 0.5f, v_blend[3]);
 852         else
 853                 glColor4fv (v_blend);
 854         glVertex2f (-5000, -5000);
 855         glVertex2f (10000, -5000);
 856         glVertex2f (-5000, 10000);
 857         glEnd ();
 858
 859         glEnable (GL_CULL_FACE);
 860         glEnable (GL_DEPTH_TEST);
 861         glDisable(GL_BLEND);
 862         glEnable(GL_TEXTURE_2D);
 863 }
 864
 865 /*
 866 ================
 867 R_RenderView
 868
 869 r_refdef must be set before the first call
 870 ================
 871 */
 872 extern void R_Sky(void);
 873 extern void UploadLightmaps(void);
 874 extern void R_DrawSurfaces(void);
 875 extern void R_DrawPortals(void);
 876 char r_speeds2_string[1024];
 877 int speedstringcount;
 878
 879 void timestring(int t, char *desc)
 880 {
 881         char tempbuf[256];
 882         int length;
 883         if (t < 1000000)
 884                 sprintf(tempbuf, " %6ius %s", t, desc);
 885         else
 886                 sprintf(tempbuf, " %6ims %s", t / 1000, desc);
 887         length = strlen(tempbuf);
 888 //      while (length < 20)
 889 //              tempbuf[length++] = ' ';
 890 //      tempbuf[length] = 0;
 891         if (speedstringcount + length > 80)
 892         {
 893                 strcat(r_speeds2_string, "\n");
 894                 speedstringcount = 0;
 895         }
 896         // skip the space at the beginning if it's the first on the line
 897         if (speedstringcount == 0)
 898         {
 899                 strcat(r_speeds2_string, tempbuf + 1);
 900                 speedstringcount = length - 1;
 901         }
 902         else
 903         {
 904                 strcat(r_speeds2_string, tempbuf);
 905                 speedstringcount += length;
 906         }
 907 }
 908
 909 #define TIMEREPORT(NAME) \
 910         if (r_speeds2.value)\
 911         {\
 912                 temptime = currtime;\
 913                 currtime = Sys_DoubleTime();\
 914                 timestring((int) ((currtime - temptime) * 1000000.0), NAME);\
 915         }
 916
 917 void R_RenderView (void)
 918 {
 919         double starttime, currtime, temptime;
 920 //      if (r_norefresh.value)
 921 //              return;
 922
 923         if (!cl.worldmodel)
 924                 Host_Error ("R_RenderView: NULL worldmodel");
 925
 926         if (r_speeds2.value)
 927         {
 928                 starttime = currtime = Sys_DoubleTime();
 929
 930                 speedstringcount = 0;
 931                 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",
 932                         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]),
 933                         c_brush_polys, c_light_polys, c_alias_polys, currenttranspoly,
 934                         c_faces, c_nodes, c_leafs,
 935                         c_models, c_bmodels, c_sprites, c_particles, c_dlights);
 936         }
 937         else
 938                 starttime = currtime = 0;
 939
 940         R_MoveParticles ();
 941         R_MoveExplosions();
 942
 943         lighthalf = gl_lightmode.value;
 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 }