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 entity_t        r_worldentity;
  25
  26 qboolean        r_cache_thrash;         // compatability
  27
  28 vec3_t          modelorg, r_entorigin;
  29 entity_t        *currententity;
  30
  31 int                     r_visframecount;        // bumped when going to a new PVS
  32 int                     r_framecount;           // used for dlight push checking
  33
  34 mplane_t        frustum[4];
  35
  36 int                     c_brush_polys, c_alias_polys, c_light_polys, c_nodes, c_leafs;
  37
  38 qboolean        envmap;                         // true during envmap command capture
  39
  40 // LordHavoc: moved all code related to particles into r_part.c
  41 //int                   particletexture;        // little dot for particles
  42 //int                   playertextures;         // up to 16 color translated skins
  43
  44 extern qboolean isG200, isRagePro; // LordHavoc: special card hacks
  45
  46 //
  47 // view origin
  48 //
  49 vec3_t  vup;
  50 vec3_t  vpn;
  51 vec3_t  vright;
  52 vec3_t  r_origin;
  53
  54 float   r_world_matrix[16];
  55 float   r_base_world_matrix[16];
  56
  57 //
  58 // screen size info
  59 //
  60 refdef_t        r_refdef;
  61
  62 mleaf_t         *r_viewleaf, *r_oldviewleaf;
  63
  64 texture_t       *r_notexture_mip;
  65
  66 unsigned short  d_lightstylevalue[256]; // 8.8 fraction of base light value
  67
  68
  69 void R_MarkLeaves (void);
  70
  71 //cvar_t        r_norefresh = {"r_norefresh","0"};
  72 cvar_t  r_drawentities = {"r_drawentities","1"};
  73 cvar_t  r_drawviewmodel = {"r_drawviewmodel","1"};
  74 cvar_t  r_speeds = {"r_speeds","0"};
  75 cvar_t  r_speeds2 = {"r_speeds2","0"};
  76 cvar_t  r_fullbright = {"r_fullbright","0"};
  77 //cvar_t        r_lightmap = {"r_lightmap","0"};
  78 cvar_t  r_shadows = {"r_shadows","0"};
  79 cvar_t  r_wateralpha = {"r_wateralpha","1"};
  80 cvar_t  r_dynamic = {"r_dynamic","1"};
  81 cvar_t  r_novis = {"r_novis","0"};
  82 cvar_t  r_waterripple = {"r_waterripple","0"};
  83 cvar_t  r_fullbrights = {"r_fullbrights", "1"};
  84
  85 cvar_t  contrast = {"contrast", "1.0", TRUE}; // LordHavoc: a method of operating system independent color correction
  86 cvar_t  brightness = {"brightness", "1.0", TRUE}; // LordHavoc: a method of operating system independent color correction
  87 cvar_t  gl_lightmode = {"gl_lightmode", "1", TRUE}; // LordHavoc: overbright lighting
  88 //cvar_t        r_dynamicbothsides = {"r_dynamicbothsides", "1"}; // LordHavoc: can disable dynamic lighting of backfaces, but quake maps are weird so it doesn't always work right...
  89 cvar_t  r_farclip = {"r_farclip", "6144"};
  90
  91 cvar_t  gl_fogenable = {"gl_fogenable", "0"};
  92 cvar_t  gl_fogdensity = {"gl_fogdensity", "0.25"};
  93 cvar_t  gl_fogred = {"gl_fogred","0.3"};
  94 cvar_t  gl_foggreen = {"gl_foggreen","0.3"};
  95 cvar_t  gl_fogblue = {"gl_fogblue","0.3"};
  96 cvar_t  gl_fogstart = {"gl_fogstart", "0"};
  97 cvar_t  gl_fogend = {"gl_fogend","0"};
  98 cvar_t  glfog = {"glfog", "0"};
  99
 100 extern qboolean isRagePro;
 101
 102 qboolean lighthalf;
 103
 104 vec3_t fogcolor;
 105 vec_t fogdensity;
 106 float fog_density, fog_red, fog_green, fog_blue;
 107 qboolean fogenabled;
 108 qboolean oldgl_fogenable;
 109 void FOG_framebegin()
 110 {
 111         if (nehahra)
 112         {
 113 //              if (!Nehahrademcompatibility)
 114 //                      gl_fogenable.value = 0;
 115                 if (gl_fogenable.value)
 116                 {
 117                         oldgl_fogenable = true;
 118                         fog_density = gl_fogdensity.value;
 119                         fog_red = gl_fogred.value;
 120                         fog_green = gl_foggreen.value;
 121                         fog_blue = gl_fogblue.value;
 122                 }
 123                 else if (oldgl_fogenable)
 124                 {
 125                         oldgl_fogenable = false;
 126                         fog_density = 0;
 127                         fog_red = 0;
 128                         fog_green = 0;
 129                         fog_blue = 0;
 130                 }
 131         }
 132         if (glfog.value)
 133         {
 134                 if (!r_render.value)
 135                         return;
 136                 if(fog_density)
 137                 {
 138                         // LordHavoc: Borland C++ 5.0 was choking on this line, stupid compiler...
 139                         //GLfloat colors[4] = {(GLfloat) gl_fogred.value, (GLfloat) gl_foggreen.value, (GLfloat) gl_fogblue.value, (GLfloat) 1};
 140                         GLfloat colors[4];
 141                         colors[0] = fog_red;
 142                         colors[1] = fog_green;
 143                         colors[2] = fog_blue;
 144                         colors[3] = 1;
 145                         if (lighthalf)
 146                         {
 147                                 colors[0] *= 0.5f;
 148                                 colors[1] *= 0.5f;
 149                                 colors[2] *= 0.5f;
 150                         }
 151
 152                         glFogi (GL_FOG_MODE, GL_EXP2);
 153                         glFogf (GL_FOG_DENSITY, (GLfloat) fog_density / 100);
 154                         glFogfv (GL_FOG_COLOR, colors);
 155                         glEnable (GL_FOG);
 156                 }
 157                 else
 158                         glDisable(GL_FOG);
 159         }
 160         else
 161         {
 162                 if (fog_density)
 163                 {
 164                         fogenabled = true;
 165                         fogdensity = -4000.0f / (fog_density * fog_density);
 166                         fogcolor[0] = fog_red   = bound(0.0f, fog_red  , 1.0f);
 167                         fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
 168                         fogcolor[2] = fog_blue  = bound(0.0f, fog_blue , 1.0f);
 169                         if (lighthalf)
 170                         {
 171                                 fogcolor[0] *= 0.5f;
 172                                 fogcolor[1] *= 0.5f;
 173                                 fogcolor[2] *= 0.5f;
 174                         }
 175                 }
 176                 else
 177                         fogenabled = false;
 178         }
 179 }
 180
 181 void FOG_frameend()
 182 {
 183         if (glfog.value)
 184                 glDisable(GL_FOG);
 185 }
 186
 187 void FOG_clear()
 188 {
 189         if (nehahra)
 190         {
 191                 Cvar_Set("gl_fogenable", "0");
 192                 Cvar_Set("gl_fogdensity", "0.2");
 193                 Cvar_Set("gl_fogred", "0.3");
 194                 Cvar_Set("gl_foggreen", "0.3");
 195                 Cvar_Set("gl_fogblue", "0.3");
 196         }
 197         fog_density = fog_red = fog_green = fog_blue = 0.0f;
 198 }
 199
 200 void FOG_registercvars()
 201 {
 202         Cvar_RegisterVariable (&glfog);
 203         if (nehahra)
 204         {
 205                 Cvar_RegisterVariable (&gl_fogenable);
 206                 Cvar_RegisterVariable (&gl_fogdensity);
 207                 Cvar_RegisterVariable (&gl_fogred);
 208                 Cvar_RegisterVariable (&gl_foggreen);
 209                 Cvar_RegisterVariable (&gl_fogblue);
 210                 Cvar_RegisterVariable (&gl_fogstart);
 211                 Cvar_RegisterVariable (&gl_fogend);
 212         }
 213 }
 214
 215 void glmain_start()
 216 {
 217 }
 218
 219 void glmain_shutdown()
 220 {
 221 }
 222
 223 void GL_Main_Init()
 224 {
 225         FOG_registercvars();
 226         Cvar_RegisterVariable (&r_speeds2);
 227         Cvar_RegisterVariable (&contrast);
 228         Cvar_RegisterVariable (&brightness);
 229         Cvar_RegisterVariable (&gl_lightmode);
 230 //      Cvar_RegisterVariable (&r_dynamicwater);
 231 //      Cvar_RegisterVariable (&r_dynamicbothsides);
 232         Cvar_RegisterVariable (&r_fullbrights);
 233         if (nehahra)
 234                 Cvar_SetValue("r_fullbrights", 0);
 235 //      if (gl_vendor && strstr(gl_vendor, "3Dfx"))
 236 //              gl_lightmode.value = 0;
 237         Cvar_RegisterVariable (&r_fullbright);
 238         R_RegisterModule("GL_Main", glmain_start, glmain_shutdown);
 239 }
 240
 241 extern void GL_Draw_Init();
 242 extern void GL_Main_Init();
 243 extern void GL_Models_Init();
 244 extern void GL_Poly_Init();
 245 extern void GL_Surf_Init();
 246 extern void GL_Screen_Init();
 247 extern void GL_Misc_Init();
 248 extern void R_Crosshairs_Init();
 249 extern void R_Light_Init();
 250 extern void R_Particles_Init();
 251
 252 void Render_Init()
 253 {
 254         R_ShutdownModules();
 255         GL_Draw_Init();
 256         GL_Main_Init();
 257         GL_Models_Init();
 258         GL_Poly_Init();
 259         GL_Surf_Init();
 260         GL_Screen_Init();
 261         GL_Misc_Init();
 262         R_Crosshairs_Init();
 263         R_Light_Init();
 264         R_Particles_Init();
 265         R_StartModules();
 266 }
 267
 268 /*
 269 void R_RotateForEntity (entity_t *e)
 270 {
 271         glTranslatef (e->origin[0],  e->origin[1],  e->origin[2]);
 272
 273         glRotatef (e->angles[1],  0, 0, 1);
 274         glRotatef (-e->angles[0],  0, 1, 0);
 275         glRotatef (e->angles[2],  1, 0, 0);
 276
 277         glScalef (e->scale, e->scale, e->scale); // LordHavoc: model scale
 278 }
 279 */
 280
 281 // LordHavoc: if not for the fact BRIGHTFIELD particles require this, it would be removed...
 282 #define NUMVERTEXNORMALS        162
 283
 284 float   r_avertexnormals[NUMVERTEXNORMALS][3] = {
 285 #include "anorms.h"
 286 };
 287
 288 // LordHavoc: moved this shading stuff up because the sprites need shading stuff
 289 vec3_t  shadevector;
 290 vec3_t  shadecolor;
 291
 292 float   modelalpha;
 293
 294 extern void R_LightPoint (vec3_t color, vec3_t p);
 295 extern void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
 296 extern void R_DynamicLightPointNoMask(vec3_t color, vec3_t org);
 297
 298 /*
 299 =============================================================
 300
 301   SPRITE MODELS
 302
 303 =============================================================
 304 */
 305
 306 /*
 307 ================
 308 R_GetSpriteFrame
 309 ================
 310 */
 311 void R_GetSpriteFrame (entity_t *currententity, mspriteframe_t **oldframe, mspriteframe_t **newframe, float *framelerp)
 312 {
 313         msprite_t               *psprite;
 314         mspritegroup_t  *pspritegroup;
 315         int                             i, j, numframes, frame;
 316         float                   *pintervals, fullinterval, targettime, time, jtime, jinterval;
 317
 318         psprite = currententity->model->cache.data;
 319         frame = currententity->frame;
 320
 321         if ((frame >= psprite->numframes) || (frame < 0))
 322         {
 323                 Con_Printf ("R_DrawSprite: no such frame %d\n", frame);
 324                 frame = 0;
 325         }
 326
 327         if (psprite->frames[frame].type == SPR_SINGLE)
 328         {
 329                 if (currententity->draw_lastmodel == currententity->model && currententity->draw_lerpstart < cl.time)
 330                 {
 331                         if (frame != currententity->draw_pose)
 332                         {
 333                                 currententity->draw_lastpose = currententity->draw_pose;
 334                                 currententity->draw_pose = frame;
 335                                 currententity->draw_lerpstart = cl.time;
 336                                 *framelerp = 0;
 337                         }
 338                         else
 339                                 *framelerp = (cl.time - currententity->draw_lerpstart) * 10.0;
 340                 }
 341                 else // uninitialized
 342                 {
 343                         currententity->draw_lastmodel = currententity->model;
 344                         currententity->draw_lastpose = currententity->draw_pose = frame;
 345                         currententity->draw_lerpstart = cl.time;
 346                         *framelerp = 0;
 347                 }
 348                 *oldframe = psprite->frames[currententity->draw_lastpose].frameptr;
 349                 *newframe = psprite->frames[frame].frameptr;
 350         }
 351         else
 352         {
 353                 pspritegroup = (mspritegroup_t *)psprite->frames[frame].frameptr;
 354                 pintervals = pspritegroup->intervals;
 355                 numframes = pspritegroup->numframes;
 356                 fullinterval = pintervals[numframes-1];
 357
 358                 time = cl.time + currententity->syncbase;
 359
 360         // when loading in Mod_LoadSpriteGroup, we guaranteed all interval values
 361         // are positive, so we don't have to worry about division by 0
 362                 targettime = time - ((int)(time / fullinterval)) * fullinterval;
 363
 364                 // LordHavoc: since I can't measure the time properly when it loops from numframes-1 to 0,
 365                 //            I instead measure the time of the first frame, hoping it is consistent
 366                 j = numframes-1;jtime = 0;jinterval = pintervals[1] - pintervals[0];
 367                 for (i=0 ; i<(numframes-1) ; i++)
 368                 {
 369                         if (pintervals[i] > targettime)
 370                                 break;
 371                         j = i;jinterval = pintervals[i] - jtime;jtime = pintervals[i];
 372                 }
 373                 *framelerp = (targettime - jtime) / jinterval;
 374
 375                 *oldframe = pspritegroup->frames[j];
 376                 *newframe = pspritegroup->frames[i];
 377         }
 378 }
 379
 380 void GL_DrawSpriteImage (mspriteframe_t *frame, vec3_t origin, vec3_t up, vec3_t right, int red, int green, int blue, int alpha)
 381 {
 382         // LordHavoc: rewrote this to use the transparent poly system
 383         transpolybegin(frame->gl_texturenum, 0, frame->gl_fogtexturenum, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 384         transpolyvert(origin[0] + frame->down * up[0] + frame->left * right[0], origin[1] + frame->down * up[1] + frame->left * right[1], origin[2] + frame->down * up[2] + frame->left * right[2], 0, 1, red, green, blue, alpha);
 385         transpolyvert(origin[0] + frame->up * up[0] + frame->left * right[0], origin[1] + frame->up * up[1] + frame->left * right[1], origin[2] + frame->up * up[2] + frame->left * right[2], 0, 0, red, green, blue, alpha);
 386         transpolyvert(origin[0] + frame->up * up[0] + frame->right * right[0], origin[1] + frame->up * up[1] + frame->right * right[1], origin[2] + frame->up * up[2] + frame->right * right[2], 1, 0, red, green, blue, alpha);
 387         transpolyvert(origin[0] + frame->down * up[0] + frame->right * right[0], origin[1] + frame->down * up[1] + frame->right * right[1], origin[2] + frame->down * up[2] + frame->right * right[2], 1, 1, red, green, blue, alpha);
 388         transpolyend();
 389 }
 390
 391 extern qboolean isG200, isRagePro, lighthalf;
 392
 393 /*
 394 =================
 395 R_DrawSpriteModel
 396
 397 =================
 398 */
 399 void R_DrawSpriteModel (entity_t *e)
 400 {
 401         mspriteframe_t  *oldframe, *newframe;
 402         float           *up, *right, lerp, ilerp;
 403         vec3_t          v_forward, v_right, v_up, org;
 404         msprite_t               *psprite;
 405
 406         // don't even bother culling, because it's just a single
 407         // polygon without a surface cache
 408         R_GetSpriteFrame (e, &oldframe, &newframe, &lerp);
 409         if (lerp < 0) lerp = 0;
 410         if (lerp > 1) lerp = 1;
 411         if (isRagePro) // LordHavoc: no alpha scaling supported on per pixel alpha images on ATI Rage Pro... ACK!
 412                 lerp = 1;
 413         ilerp = 1.0 - lerp;
 414         psprite = e->model->cache.data;
 415
 416         if (psprite->type == SPR_ORIENTED)
 417         {       // bullet marks on walls
 418                 AngleVectors (e->angles, v_forward, v_right, v_up);
 419                 up = v_up;
 420                 right = v_right;
 421                 VectorSubtract(e->origin, vpn, org);
 422         }
 423         else
 424         {       // normal sprite
 425                 up = vup;
 426                 right = vright;
 427                 VectorCopy(e->origin, org);
 428         }
 429         if (e->scale != 1)
 430         {
 431                 VectorScale(up, e->scale, up);
 432                 VectorScale(right, e->scale, right);
 433         }
 434
 435         if (e->model->flags & EF_FULLBRIGHT || e->effects & EF_FULLBRIGHT)
 436         {
 437                 shadecolor[0] = e->colormod[0] * 255;
 438                 shadecolor[1] = e->colormod[1] * 255;
 439                 shadecolor[2] = e->colormod[2] * 255;
 440         }
 441         else
 442         {
 443                 R_LightPoint (shadecolor, e->origin);
 444                 R_DynamicLightPointNoMask(shadecolor, e->origin);
 445         }
 446
 447         // LordHavoc: interpolated sprite rendering
 448         if (ilerp != 0)
 449                 GL_DrawSpriteImage(oldframe, org, up, right, shadecolor[0],shadecolor[1],shadecolor[2],e->alpha*255*ilerp);
 450         if (lerp != 0)
 451                 GL_DrawSpriteImage(newframe, org, up, right, shadecolor[0],shadecolor[1],shadecolor[2],e->alpha*255*lerp);
 452 }
 453
 454 //==================================================================================
 455
 456 void R_DrawBrushModel (entity_t *e);
 457
 458 /*
 459 =============
 460 R_DrawEntitiesOnList
 461 =============
 462 */
 463 // LordHavoc: split so bmodels are rendered before any other objects
 464 void R_DrawEntitiesOnList1 (void)
 465 {
 466         int             i;
 467
 468         if (!r_drawentities.value)
 469                 return;
 470
 471         for (i=0 ; i<cl_numvisedicts ; i++)
 472         {
 473                 if (cl_visedicts[i]->model->type != mod_brush)
 474                         continue;
 475                 currententity = cl_visedicts[i];
 476                 modelalpha = currententity->alpha;
 477
 478                 R_DrawBrushModel (currententity);
 479         }
 480 }
 481
 482 void R_DrawEntitiesOnList2 (void)
 483 {
 484         int             i;
 485
 486         if (!r_drawentities.value)
 487                 return;
 488
 489         for (i=0 ; i<cl_numvisedicts ; i++)
 490         {
 491                 currententity = cl_visedicts[i];
 492                 modelalpha = currententity->alpha;
 493
 494                 switch (currententity->model->type)
 495                 {
 496                 case mod_alias:
 497                         R_DrawAliasModel (currententity, true, modelalpha, currententity->model, currententity->frame, currententity->skinnum, currententity->origin, currententity->effects, currententity->model->flags, currententity->colormap);
 498                         break;
 499
 500                 case mod_sprite:
 501                         R_DrawSpriteModel (currententity);
 502                         break;
 503
 504                 default:
 505                         break;
 506                 }
 507         }
 508 }
 509
 510 /*
 511 =============
 512 R_DrawViewModel
 513 =============
 514 */
 515 void R_DrawViewModel (void)
 516 {
 517         if (!r_drawviewmodel.value || chase_active.value || envmap || !r_drawentities.value || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.model)
 518                 return;
 519
 520         currententity = &cl.viewent;
 521         currententity->alpha = modelalpha = cl_entities[cl.viewentity].alpha; // LordHavoc: if the player is transparent, so is his gun
 522         currententity->effects = cl_entities[cl.viewentity].effects;
 523         currententity->scale = 1;
 524         VectorCopy(cl_entities[cl.viewentity].colormod, currententity->colormod);
 525
 526         // hack the depth range to prevent view model from poking into walls
 527         glDepthRange (gldepthmin, gldepthmin + 0.3*(gldepthmax-gldepthmin));
 528         R_DrawAliasModel (currententity, FALSE, modelalpha, currententity->model, currententity->frame, currententity->skinnum, currententity->origin, currententity->effects, currententity->model->flags, currententity->colormap);
 529         glDepthRange (gldepthmin, gldepthmax);
 530 }
 531
 532 void R_DrawBrushModel (entity_t *e);
 533
 534 void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees );
 535
 536 void R_SetFrustum (void)
 537 {
 538         int             i;
 539
 540         if (r_refdef.fov_x == 90)
 541         {
 542                 // front side is visible
 543
 544                 VectorAdd (vpn, vright, frustum[0].normal);
 545                 VectorSubtract (vpn, vright, frustum[1].normal);
 546
 547                 VectorAdd (vpn, vup, frustum[2].normal);
 548                 VectorSubtract (vpn, vup, frustum[3].normal);
 549         }
 550         else
 551         {
 552                 // rotate VPN right by FOV_X/2 degrees
 553                 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
 554                 // rotate VPN left by FOV_X/2 degrees
 555                 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
 556                 // rotate VPN up by FOV_X/2 degrees
 557                 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
 558                 // rotate VPN down by FOV_X/2 degrees
 559                 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
 560         }
 561
 562         for (i=0 ; i<4 ; i++)
 563         {
 564                 frustum[i].type = PLANE_ANYZ;
 565                 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
 566 //              frustum[i].signbits = SignbitsForPlane (&frustum[i]);
 567                 BoxOnPlaneSideClassify(&frustum[i]);
 568         }
 569 }
 570
 571 void R_AnimateLight (void);
 572 void V_CalcBlend (void);
 573
 574 /*
 575 ===============
 576 R_SetupFrame
 577 ===============
 578 */
 579 void R_SetupFrame (void)
 580 {
 581 // don't allow cheats in multiplayer
 582         if (cl.maxclients > 1)
 583         {
 584                 Cvar_Set ("r_fullbright", "0");
 585                 Cvar_Set ("r_ambient", "0");
 586         }
 587
 588         R_AnimateLight ();
 589
 590         r_framecount++;
 591
 592 // build the transformation matrix for the given view angles
 593         VectorCopy (r_refdef.vieworg, r_origin);
 594
 595         AngleVectors (r_refdef.viewangles, vpn, vright, vup);
 596
 597 // current viewleaf
 598         r_oldviewleaf = r_viewleaf;
 599         r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
 600
 601         V_SetContentsColor (r_viewleaf->contents);
 602         V_CalcBlend ();
 603
 604         r_cache_thrash = false;
 605
 606         c_brush_polys = 0;
 607         c_alias_polys = 0;
 608         c_light_polys = 0;
 609         c_nodes = 0;
 610         c_leafs = 0;
 611
 612 }
 613
 614
 615 void MYgluPerspective( GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar )
 616 {
 617    GLdouble xmin, xmax, ymin, ymax;
 618
 619    ymax = zNear * tan( fovy * M_PI / 360.0 );
 620    ymin = -ymax;
 621
 622    xmin = ymin * aspect;
 623    xmax = ymax * aspect;
 624
 625    glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
 626 }
 627
 628
 629 extern char skyname[];
 630
 631 /*
 632 =============
 633 R_SetupGL
 634 =============
 635 */
 636 void R_SetupGL (void)
 637 {
 638         float   screenaspect;
 639         extern  int glwidth, glheight;
 640         int             x, x2, y2, y, w, h;
 641
 642         if (!r_render.value)
 643                 return;
 644         //
 645         // set up viewpoint
 646         //
 647         glMatrixMode(GL_PROJECTION);
 648     glLoadIdentity ();
 649         x = r_refdef.vrect.x * glwidth/vid.width;
 650         x2 = (r_refdef.vrect.x + r_refdef.vrect.width) * glwidth/vid.width;
 651         y = (vid.height-r_refdef.vrect.y) * glheight/vid.height;
 652         y2 = (vid.height - (r_refdef.vrect.y + r_refdef.vrect.height)) * glheight/vid.height;
 653
 654         // fudge around because of frac screen scale
 655         if (x > 0)
 656                 x--;
 657         if (x2 < glwidth)
 658                 x2++;
 659         if (y2 < 0)
 660                 y2--;
 661         if (y < glheight)
 662                 y++;
 663
 664         w = x2 - x;
 665         h = y - y2;
 666
 667         if (envmap)
 668         {
 669                 x = y2 = 0;
 670                 w = h = 256;
 671         }
 672
 673         glViewport (glx + x, gly + y2, w, h);
 674     screenaspect = (float)r_refdef.vrect.width/r_refdef.vrect.height;
 675 //      yfov = 2*atan((float)r_refdef.vrect.height/r_refdef.vrect.width)*180/M_PI;
 676 //      if (skyname[0]) // skybox enabled?
 677 //              MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  r_skyboxsize.value*1.732050807569 + 256); // this is size*sqrt(3) + 256
 678 //      else
 679                 MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  r_farclip.value);
 680
 681         glCullFace(GL_FRONT);
 682
 683         glMatrixMode(GL_MODELVIEW);
 684     glLoadIdentity ();
 685
 686     glRotatef (-90,  1, 0, 0);      // put Z going up
 687     glRotatef (90,  0, 0, 1);       // put Z going up
 688     glRotatef (-r_refdef.viewangles[2],  1, 0, 0);
 689     glRotatef (-r_refdef.viewangles[0],  0, 1, 0);
 690     glRotatef (-r_refdef.viewangles[1],  0, 0, 1);
 691     glTranslatef (-r_refdef.vieworg[0],  -r_refdef.vieworg[1],  -r_refdef.vieworg[2]);
 692
 693         glGetFloatv (GL_MODELVIEW_MATRIX, r_world_matrix);
 694
 695         //
 696         // set drawing parms
 697         //
 698 //      if (gl_cull.value)
 699                 glEnable(GL_CULL_FACE);
 700 //      else
 701 //              glDisable(GL_CULL_FACE);
 702
 703         glEnable(GL_BLEND); // was Disable
 704         glDisable(GL_ALPHA_TEST);
 705         glAlphaFunc(GL_GREATER, 0.5);
 706         glEnable(GL_DEPTH_TEST);
 707         glDepthMask(1);
 708         glShadeModel(GL_SMOOTH);
 709 }
 710
 711 void R_DrawWorld (void);
 712 //void R_RenderDlights (void);
 713 void R_DrawParticles (void);
 714
 715 /*
 716 =============
 717 R_Clear
 718 =============
 719 */
 720 void R_Clear (void)
 721 {
 722         if (!r_render.value)
 723                 return;
 724 //      glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // LordHavoc: moved to SCR_UpdateScreen
 725         gldepthmin = 0;
 726         gldepthmax = 1;
 727         glDepthFunc (GL_LEQUAL);
 728
 729         glDepthRange (gldepthmin, gldepthmax);
 730 }
 731
 732 // LordHavoc: my trick to *FIX* GLQuake lighting once and for all :)
 733 void GL_Brighten()
 734 {
 735         if (!r_render.value)
 736                 return;
 737         glMatrixMode(GL_PROJECTION);
 738     glLoadIdentity ();
 739         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 740         glMatrixMode(GL_MODELVIEW);
 741     glLoadIdentity ();
 742         glDisable (GL_DEPTH_TEST);
 743         glDisable (GL_CULL_FACE);
 744         glDisable(GL_TEXTURE_2D);
 745         glEnable(GL_BLEND);
 746         glBlendFunc (GL_DST_COLOR, GL_ONE);
 747         glBegin (GL_TRIANGLES);
 748         glColor3f (1, 1, 1);
 749         glVertex2f (-5000, -5000);
 750         glVertex2f (10000, -5000);
 751         glVertex2f (-5000, 10000);
 752         glEnd ();
 753         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 754         glDisable(GL_BLEND);
 755         glEnable(GL_TEXTURE_2D);
 756         glEnable (GL_DEPTH_TEST);
 757         glEnable (GL_CULL_FACE);
 758 }
 759
 760 extern cvar_t contrast;
 761 extern cvar_t brightness;
 762 extern cvar_t gl_lightmode;
 763
 764 void GL_BlendView()
 765 {
 766         if (!r_render.value)
 767                 return;
 768         glMatrixMode(GL_PROJECTION);
 769     glLoadIdentity ();
 770         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 771         glMatrixMode(GL_MODELVIEW);
 772     glLoadIdentity ();
 773         glDisable (GL_DEPTH_TEST);
 774         glDisable (GL_CULL_FACE);
 775         glDisable(GL_TEXTURE_2D);
 776         glEnable(GL_BLEND);
 777         if (lighthalf)
 778         {
 779                 glBlendFunc (GL_DST_COLOR, GL_ONE);
 780                 glBegin (GL_TRIANGLES);
 781                 glColor3f (1, 1, 1);
 782                 glVertex2f (-5000, -5000);
 783                 glVertex2f (10000, -5000);
 784                 glVertex2f (-5000, 10000);
 785                 glEnd ();
 786         }
 787         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 788         contrast.value = bound(0.2, contrast.value, 1.0);
 789         if (/*gl_polyblend.value && */v_blend[3])
 790         {
 791                 glBegin (GL_TRIANGLES);
 792                 glColor4fv (v_blend);
 793                 glVertex2f (-5000, -5000);
 794                 glVertex2f (10000, -5000);
 795                 glVertex2f (-5000, 10000);
 796                 glEnd ();
 797         }
 798
 799         glEnable (GL_CULL_FACE);
 800         glEnable (GL_DEPTH_TEST);
 801         glDisable(GL_BLEND);
 802         glEnable(GL_TEXTURE_2D);
 803 }
 804
 805 #define TIMEREPORT(DESC) \
 806         if (r_speeds2.value)\
 807         {\
 808                 temptime = -currtime;\
 809                 currtime = Sys_FloatTime();\
 810                 temptime += currtime;\
 811                 Con_Printf(DESC " %.4fms ", temptime * 1000.0);\
 812         }
 813
 814 /*
 815 ================
 816 R_RenderView
 817
 818 r_refdef must be set before the first call
 819 ================
 820 */
 821 extern qboolean intimerefresh;
 822 extern qboolean skyisvisible;
 823 extern void R_Sky();
 824 extern void UploadLightmaps();
 825 void R_RenderView (void)
 826 {
 827 //      double currtime, temptime;
 828 //      if (r_norefresh.value)
 829 //              return;
 830
 831         if (!r_worldentity.model || !cl.worldmodel)
 832                 Sys_Error ("R_RenderView: NULL worldmodel");
 833
 834         lighthalf = gl_lightmode.value;
 835
 836         FOG_framebegin();
 837
 838 //      if (r_speeds2.value)
 839 //      {
 840 //              currtime = Sys_FloatTime();
 841 //              Con_Printf("render time: ");
 842 //      }
 843         R_Clear();
 844 //      TIMEREPORT("R_Clear")
 845
 846         // render normal view
 847
 848         R_SetupFrame ();
 849         R_SetFrustum ();
 850         R_SetupGL ();
 851
 852         skypolyclear();
 853         wallpolyclear();
 854         transpolyclear();
 855         skyisvisible = false;
 856
 857         R_MarkLeaves ();        // done here so we know if we're in water
 858         R_DrawWorld ();         // adds static entities to the list
 859         if (!intimerefresh)
 860                 S_ExtraUpdate ();       // don't let sound get messed up if going slow
 861         R_DrawEntitiesOnList1 (); // BSP models
 862
 863         skypolyrender(); // fogged sky polys, affects depth
 864         if (skyname[0] && skyisvisible && !fogenabled)
 865                 R_Sky(); // does not affect depth, draws over the sky polys
 866
 867         UploadLightmaps();
 868         wallpolyrender();
 869
 870         R_DrawEntitiesOnList2 (); // other models
 871 //      R_RenderDlights ();
 872         R_DrawViewModel ();
 873         R_DrawParticles ();
 874
 875         transpolyrender();
 876
 877         FOG_frameend();
 878         GL_BlendView();
 879 //      if (r_speeds2.value)
 880 //              Con_Printf("\n");
 881 }