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