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_faces, c_nodes, c_leafs, c_models, c_bmodels, c_sprites, c_particles, c_dlights;
  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 //
  45 // view origin
  46 //
  47 vec3_t  vup;
  48 vec3_t  vpn;
  49 vec3_t  vright;
  50 vec3_t  r_origin;
  51
  52 float   r_world_matrix[16];
  53 float   r_base_world_matrix[16];
  54
  55 //
  56 // screen size info
  57 //
  58 refdef_t        r_refdef;
  59
  60 mleaf_t         *r_viewleaf, *r_oldviewleaf;
  61
  62 texture_t       *r_notexture_mip;
  63
  64 unsigned short  d_lightstylevalue[256]; // 8.8 fraction of base light value
  65
  66
  67 void R_MarkLeaves (void);
  68
  69 //cvar_t        r_norefresh = {"r_norefresh","0"};
  70 cvar_t  r_drawentities = {"r_drawentities","1"};
  71 cvar_t  r_drawviewmodel = {"r_drawviewmodel","1"};
  72 cvar_t  r_speeds = {"r_speeds","0"};
  73 cvar_t  r_speeds2 = {"r_speeds2","0"};
  74 cvar_t  r_fullbright = {"r_fullbright","0"};
  75 //cvar_t        r_lightmap = {"r_lightmap","0"};
  76 cvar_t  r_wateralpha = {"r_wateralpha","1"};
  77 cvar_t  r_dynamic = {"r_dynamic","1"};
  78 cvar_t  r_novis = {"r_novis","0"};
  79 cvar_t  r_waterripple = {"r_waterripple","0"};
  80 cvar_t  r_fullbrights = {"r_fullbrights", "1"};
  81
  82 cvar_t  contrast = {"contrast", "1.0", true}; // LordHavoc: a method of operating system independent color correction
  83 cvar_t  brightness = {"brightness", "1.0", true}; // LordHavoc: a method of operating system independent color correction
  84 cvar_t  gl_lightmode = {"gl_lightmode", "1", true}; // LordHavoc: overbright lighting
  85 //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...
  86 cvar_t  r_farclip = {"r_farclip", "6144"};
  87
  88 cvar_t  gl_fogenable = {"gl_fogenable", "0"};
  89 cvar_t  gl_fogdensity = {"gl_fogdensity", "0.25"};
  90 cvar_t  gl_fogred = {"gl_fogred","0.3"};
  91 cvar_t  gl_foggreen = {"gl_foggreen","0.3"};
  92 cvar_t  gl_fogblue = {"gl_fogblue","0.3"};
  93 cvar_t  gl_fogstart = {"gl_fogstart", "0"};
  94 cvar_t  gl_fogend = {"gl_fogend","0"};
  95 cvar_t  glfog = {"glfog", "0"};
  96
  97 qboolean lighthalf;
  98
  99 vec3_t fogcolor;
 100 vec_t fogdensity;
 101 float fog_density, fog_red, fog_green, fog_blue;
 102 qboolean fogenabled;
 103 qboolean oldgl_fogenable;
 104 void FOG_framebegin()
 105 {
 106         if (nehahra)
 107         {
 108 //              if (!Nehahrademcompatibility)
 109 //                      gl_fogenable.value = 0;
 110                 if (gl_fogenable.value)
 111                 {
 112                         oldgl_fogenable = true;
 113                         fog_density = gl_fogdensity.value;
 114                         fog_red = gl_fogred.value;
 115                         fog_green = gl_foggreen.value;
 116                         fog_blue = gl_fogblue.value;
 117                 }
 118                 else if (oldgl_fogenable)
 119                 {
 120                         oldgl_fogenable = false;
 121                         fog_density = 0;
 122                         fog_red = 0;
 123                         fog_green = 0;
 124                         fog_blue = 0;
 125                 }
 126         }
 127         if (fog_density)
 128         {
 129                         fogcolor[0] = fog_red   = bound(0.0f, fog_red  , 1.0f);
 130                         fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
 131                         fogcolor[2] = fog_blue  = bound(0.0f, fog_blue , 1.0f);
 132                         if (lighthalf)
 133                         {
 134                                 fogcolor[0] *= 0.5f;
 135                                 fogcolor[1] *= 0.5f;
 136                                 fogcolor[2] *= 0.5f;
 137                         }
 138         }
 139         if (glfog.value)
 140         {
 141                 if (!r_render.value)
 142                         return;
 143                 if(fog_density)
 144                 {
 145                         // LordHavoc: Borland C++ 5.0 was choking on this line, stupid compiler...
 146                         //GLfloat colors[4] = {(GLfloat) gl_fogred.value, (GLfloat) gl_foggreen.value, (GLfloat) gl_fogblue.value, (GLfloat) 1};
 147                         GLfloat colors[4];
 148                         colors[0] = fog_red;
 149                         colors[1] = fog_green;
 150                         colors[2] = fog_blue;
 151                         colors[3] = 1;
 152                         if (lighthalf)
 153                         {
 154                                 colors[0] *= 0.5f;
 155                                 colors[1] *= 0.5f;
 156                                 colors[2] *= 0.5f;
 157                         }
 158
 159                         glFogi (GL_FOG_MODE, GL_EXP2);
 160                         glFogf (GL_FOG_DENSITY, (GLfloat) fog_density / 100);
 161                         glFogfv (GL_FOG_COLOR, colors);
 162                         glEnable (GL_FOG);
 163                 }
 164                 else
 165                         glDisable(GL_FOG);
 166         }
 167         else
 168         {
 169                 if (fog_density)
 170                 {
 171                         fogenabled = true;
 172                         fogdensity = -4000.0f / (fog_density * fog_density);
 173                         // fog color was already set
 174                 }
 175                 else
 176                         fogenabled = false;
 177         }
 178 }
 179
 180 void FOG_frameend()
 181 {
 182         if (glfog.value)
 183                 glDisable(GL_FOG);
 184 }
 185
 186 void FOG_clear()
 187 {
 188         if (nehahra)
 189         {
 190                 Cvar_Set("gl_fogenable", "0");
 191                 Cvar_Set("gl_fogdensity", "0.2");
 192                 Cvar_Set("gl_fogred", "0.3");
 193                 Cvar_Set("gl_foggreen", "0.3");
 194                 Cvar_Set("gl_fogblue", "0.3");
 195         }
 196         fog_density = fog_red = fog_green = fog_blue = 0.0f;
 197 }
 198
 199 void FOG_registercvars()
 200 {
 201         Cvar_RegisterVariable (&glfog);
 202         if (nehahra)
 203         {
 204                 Cvar_RegisterVariable (&gl_fogenable);
 205                 Cvar_RegisterVariable (&gl_fogdensity);
 206                 Cvar_RegisterVariable (&gl_fogred);
 207                 Cvar_RegisterVariable (&gl_foggreen);
 208                 Cvar_RegisterVariable (&gl_fogblue);
 209                 Cvar_RegisterVariable (&gl_fogstart);
 210                 Cvar_RegisterVariable (&gl_fogend);
 211         }
 212 }
 213
 214 void gl_main_start()
 215 {
 216 }
 217
 218 void gl_main_shutdown()
 219 {
 220 }
 221
 222 void gl_main_newmap()
 223 {
 224 }
 225
 226 void GL_Main_Init()
 227 {
 228         FOG_registercvars();
 229         Cvar_RegisterVariable (&r_drawentities);
 230         Cvar_RegisterVariable (&r_drawviewmodel);
 231         Cvar_RegisterVariable (&r_speeds);
 232         Cvar_RegisterVariable (&r_speeds2);
 233         Cvar_RegisterVariable (&contrast);
 234         Cvar_RegisterVariable (&brightness);
 235         Cvar_RegisterVariable (&gl_lightmode);
 236 //      Cvar_RegisterVariable (&r_dynamicwater);
 237 //      Cvar_RegisterVariable (&r_dynamicbothsides);
 238         Cvar_RegisterVariable (&r_fullbrights);
 239         Cvar_RegisterVariable (&r_wateralpha);
 240         Cvar_RegisterVariable (&r_dynamic);
 241         Cvar_RegisterVariable (&r_novis);
 242         Cvar_RegisterVariable (&r_waterripple); // LordHavoc: added waterripple
 243         if (nehahra)
 244                 Cvar_SetValue("r_fullbrights", 0);
 245 //      if (gl_vendor && strstr(gl_vendor, "3Dfx"))
 246 //              gl_lightmode.value = 0;
 247         Cvar_RegisterVariable (&r_fullbright);
 248         R_RegisterModule("GL_Main", gl_main_start, gl_main_shutdown, gl_main_newmap);
 249 }
 250
 251 extern void GL_Draw_Init();
 252 extern void GL_Main_Init();
 253 extern void GL_Models_Init();
 254 extern void GL_Poly_Init();
 255 extern void GL_Surf_Init();
 256 extern void GL_Screen_Init();
 257 extern void GL_Misc_Init();
 258 extern void R_Crosshairs_Init();
 259 extern void R_Light_Init();
 260 extern void R_Particles_Init();
 261 extern void R_Explosion_Init();
 262 extern void CL_Effects_Init();
 263
 264 void Render_Init()
 265 {
 266         R_Modules_Shutdown();
 267         GL_Draw_Init();
 268         GL_Main_Init();
 269         GL_Models_Init();
 270         GL_Poly_Init();
 271         GL_Surf_Init();
 272         GL_Screen_Init();
 273         GL_Misc_Init();
 274         R_Crosshairs_Init();
 275         R_Light_Init();
 276         R_Particles_Init();
 277         R_Explosion_Init();
 278         CL_Effects_Init();
 279         R_Decals_Init();
 280         R_Modules_Start();
 281 }
 282
 283 /*
 284 ===============
 285 GL_Init
 286 ===============
 287 */
 288 extern char *ENGINE_EXTENSIONS;
 289 void GL_Init (void)
 290 {
 291         gl_vendor = glGetString (GL_VENDOR);
 292         Con_Printf ("GL_VENDOR: %s\n", gl_vendor);
 293         gl_renderer = glGetString (GL_RENDERER);
 294         Con_Printf ("GL_RENDERER: %s\n", gl_renderer);
 295
 296         gl_version = glGetString (GL_VERSION);
 297         Con_Printf ("GL_VERSION: %s\n", gl_version);
 298         gl_extensions = glGetString (GL_EXTENSIONS);
 299         Con_Printf ("GL_EXTENSIONS: %s\n", gl_extensions);
 300
 301 //      Con_Printf ("%s %s\n", gl_renderer, gl_version);
 302
 303         VID_CheckMultitexture();
 304         VID_CheckCVA();
 305
 306         // LordHavoc: report supported extensions
 307         Con_Printf ("\nengine extensions: %s\n", ENGINE_EXTENSIONS);
 308
 309         glCullFace(GL_FRONT);
 310         glEnable(GL_TEXTURE_2D);
 311 //      glDisable(GL_ALPHA_TEST);
 312         glAlphaFunc(GL_GREATER, 0.5);
 313
 314 //      glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
 315
 316         Palette_Init();
 317 }
 318
 319
 320 /*
 321 void R_RotateForEntity (entity_t *e)
 322 {
 323         glTranslatef (e->origin[0],  e->origin[1],  e->origin[2]);
 324
 325         glRotatef (e->angles[1],  0, 0, 1);
 326         glRotatef (-e->angles[0],  0, 1, 0);
 327         glRotatef (e->angles[2],  1, 0, 0);
 328
 329         glScalef (e->scale, e->scale, e->scale); // LordHavoc: model scale
 330 }
 331 */
 332
 333 // LordHavoc: shading stuff
 334 vec3_t  shadevector;
 335 vec3_t  shadecolor;
 336
 337 float   modelalpha;
 338
 339 //==================================================================================
 340
 341 void R_DrawBrushModel (entity_t *e);
 342 void R_DrawSpriteModel (entity_t *e, frameblend_t *blend);
 343
 344 void R_LerpUpdate(entity_t *ent)
 345 {
 346         int frame;
 347         frame = ent->render.frame;
 348         if (ent->render.model && ent->render.frame >= ent->render.model->numframes)
 349         {
 350                 Con_Printf("R_LerpUpdate: no such frame%6i in \"%s\"\n", ent->render.frame, ent->render.model->name);
 351                 frame = 0;
 352         }
 353
 354         if (ent->render.lerp_model != ent->render.model)
 355         {
 356                 // reset all interpolation information
 357                 ent->render.lerp_model = ent->render.model;
 358                 ent->render.frame1 = ent->render.frame2 = frame;
 359                 ent->render.frame1start = ent->render.frame2start = cl.time;
 360                 ent->render.framelerp = 1;
 361                 ent->render.lerp_starttime = 0;
 362         }
 363         else if (ent->render.frame2 != frame)
 364         {
 365                 // transition to new frame
 366                 ent->render.frame1 = ent->render.frame2;
 367                 ent->render.frame1start = ent->render.frame2start;
 368                 ent->render.frame2 = frame;
 369                 ent->render.frame2start = cl.time;
 370                 ent->render.framelerp = 0;
 371                 ent->render.lerp_starttime = cl.time;
 372         }
 373         else
 374         {
 375                 // lerp_starttime < 0 is used to prevent changing of framelerp
 376                 if (ent->render.lerp_starttime >= 0)
 377                 {
 378                         // update transition
 379                         ent->render.framelerp = (cl.time - ent->render.lerp_starttime) * 10;
 380                         ent->render.framelerp = bound(0, ent->render.framelerp, 1);
 381                 }
 382         }
 383 }
 384
 385
 386 void R_PrepareEntities (void)
 387 {
 388         int i;
 389         entity_t *ent;
 390         vec3_t v;
 391         // this updates entities that are supposed to be view relative
 392         for (i = 0;i < cl_numvisedicts;i++)
 393         {
 394                 ent = cl_visedicts[i];
 395
 396                 if (ent->render.flags & RENDER_VIEWMODEL)
 397                 {
 398                         // remove flag so it will not be repeated incase RelinkEntities is not called again for a while
 399                         ent->render.flags -= RENDER_VIEWMODEL;
 400                         // transform origin
 401                         VectorCopy(ent->render.origin, v);
 402                         ent->render.origin[0] = v[0] * vpn[0] + v[1] * vright[0] + v[2] * vup[0] + r_refdef.vieworg[0];
 403                         ent->render.origin[1] = v[0] * vpn[1] + v[1] * vright[1] + v[2] * vup[1] + r_refdef.vieworg[1];
 404                         ent->render.origin[2] = v[0] * vpn[2] + v[1] * vright[2] + v[2] * vup[2] + r_refdef.vieworg[2];
 405                         // adjust angles
 406                         VectorAdd(ent->render.angles, r_refdef.viewangles, ent->render.angles);
 407                 }
 408         }
 409 }
 410
 411 /*
 412 =============
 413 R_DrawEntitiesOnList
 414 =============
 415 */
 416 // LordHavoc: split so bmodels are rendered before any other objects
 417 void R_DrawEntitiesOnList1 (void)
 418 {
 419         int             i;
 420
 421         if (!r_drawentities.value)
 422                 return;
 423
 424         for (i = 0;i < cl_numvisedicts;i++)
 425         {
 426                 if (cl_visedicts[i]->render.model->type != mod_brush)
 427                         continue;
 428                 currententity = cl_visedicts[i];
 429                 modelalpha = currententity->render.alpha;
 430
 431                 R_DrawBrushModel (currententity);
 432         }
 433 }
 434
 435 void R_DrawEntitiesOnList2 (void)
 436 {
 437         int             i;
 438         frameblend_t blend[4];
 439
 440         if (!r_drawentities.value)
 441                 return;
 442
 443         for (i = 0;i < cl_numvisedicts;i++)
 444         {
 445                 currententity = cl_visedicts[i];
 446                 modelalpha = currententity->render.alpha;
 447
 448                 switch (currententity->render.model->type)
 449                 {
 450                 case mod_alias:
 451                         R_LerpUpdate(currententity);
 452                         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 453                         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);
 454                         break;
 455
 456                 case mod_sprite:
 457                         R_LerpUpdate(currententity);
 458                         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 459                         R_DrawSpriteModel (currententity, blend);
 460                         break;
 461
 462                 default:
 463                         break;
 464                 }
 465         }
 466 }
 467
 468 /*
 469 =============
 470 R_DrawViewModel
 471 =============
 472 */
 473 void R_DrawViewModel (void)
 474 {
 475         frameblend_t blend[4];
 476
 477         if (!r_drawviewmodel.value || chase_active.value || envmap || !r_drawentities.value || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.render.model)
 478                 return;
 479
 480         currententity = &cl.viewent;
 481         currententity->render.alpha = modelalpha = cl_entities[cl.viewentity].render.alpha; // LordHavoc: if the player is transparent, so is the gun
 482         currententity->render.effects = cl_entities[cl.viewentity].render.effects;
 483         currententity->render.scale = 1;
 484         VectorCopy(cl_entities[cl.viewentity].render.colormod, currententity->render.colormod);
 485
 486         R_LerpUpdate(currententity);
 487         R_LerpAnimation(currententity->render.model, currententity->render.frame1, currententity->render.frame2, currententity->render.frame1start, currententity->render.frame2start, currententity->render.framelerp, blend);
 488
 489         // hack the depth range to prevent view model from poking into walls
 490         glDepthRange (gldepthmin, gldepthmin + 0.3*(gldepthmax-gldepthmin));
 491         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);
 492         glDepthRange (gldepthmin, gldepthmax);
 493 }
 494
 495 void R_DrawBrushModel (entity_t *e);
 496
 497 void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees );
 498
 499 void R_SetFrustum (void)
 500 {
 501         int             i;
 502
 503         if (r_refdef.fov_x == 90)
 504         {
 505                 // front side is visible
 506
 507                 VectorAdd (vpn, vright, frustum[0].normal);
 508                 VectorSubtract (vpn, vright, frustum[1].normal);
 509
 510                 VectorAdd (vpn, vup, frustum[2].normal);
 511                 VectorSubtract (vpn, vup, frustum[3].normal);
 512         }
 513         else
 514         {
 515                 // rotate VPN right by FOV_X/2 degrees
 516                 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
 517                 // rotate VPN left by FOV_X/2 degrees
 518                 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
 519                 // rotate VPN up by FOV_X/2 degrees
 520                 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
 521                 // rotate VPN down by FOV_X/2 degrees
 522                 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
 523         }
 524
 525         for (i=0 ; i<4 ; i++)
 526         {
 527                 frustum[i].type = PLANE_ANYZ;
 528                 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
 529 //              frustum[i].signbits = SignbitsForPlane (&frustum[i]);
 530                 BoxOnPlaneSideClassify(&frustum[i]);
 531         }
 532 }
 533
 534 void R_AnimateLight (void);
 535 void V_CalcBlend (void);
 536
 537 /*
 538 ===============
 539 R_SetupFrame
 540 ===============
 541 */
 542 void R_SetupFrame (void)
 543 {
 544 // don't allow cheats in multiplayer
 545         if (cl.maxclients > 1)
 546         {
 547                 Cvar_Set ("r_fullbright", "0");
 548                 Cvar_Set ("r_ambient", "0");
 549         }
 550
 551         R_AnimateLight ();
 552
 553         r_framecount++;
 554
 555 // build the transformation matrix for the given view angles
 556         VectorCopy (r_refdef.vieworg, r_origin);
 557
 558         AngleVectors (r_refdef.viewangles, vpn, vright, vup);
 559
 560 // current viewleaf
 561         r_oldviewleaf = r_viewleaf;
 562         r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
 563
 564         V_SetContentsColor (r_viewleaf->contents);
 565         V_CalcBlend ();
 566
 567         r_cache_thrash = false;
 568
 569         c_brush_polys = 0;
 570         c_alias_polys = 0;
 571         c_light_polys = 0;
 572         c_faces = 0;
 573         c_nodes = 0;
 574         c_leafs = 0;
 575         c_models = 0;
 576         c_bmodels = 0;
 577         c_sprites = 0;
 578         c_particles = 0;
 579 //      c_dlights = 0;
 580 }
 581
 582
 583 void MYgluPerspective( GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar )
 584 {
 585    GLdouble xmin, xmax, ymin, ymax;
 586
 587    ymax = zNear * tan( fovy * M_PI / 360.0 );
 588    ymin = -ymax;
 589
 590    xmin = ymin * aspect;
 591    xmax = ymax * aspect;
 592
 593    glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
 594 }
 595
 596
 597 extern char skyname[];
 598
 599 /*
 600 =============
 601 R_SetupGL
 602 =============
 603 */
 604 void R_SetupGL (void)
 605 {
 606         float   screenaspect;
 607         extern  int glwidth, glheight;
 608         int             x, x2, y2, y, w, h;
 609
 610         if (!r_render.value)
 611                 return;
 612         //
 613         // set up viewpoint
 614         //
 615         glMatrixMode(GL_PROJECTION);
 616     glLoadIdentity ();
 617         x = r_refdef.vrect.x * glwidth/vid.width;
 618         x2 = (r_refdef.vrect.x + r_refdef.vrect.width) * glwidth/vid.width;
 619         y = (vid.height-r_refdef.vrect.y) * glheight/vid.height;
 620         y2 = (vid.height - (r_refdef.vrect.y + r_refdef.vrect.height)) * glheight/vid.height;
 621
 622         // fudge around because of frac screen scale
 623         if (x > 0)
 624                 x--;
 625         if (x2 < glwidth)
 626                 x2++;
 627         if (y2 < 0)
 628                 y2--;
 629         if (y < glheight)
 630                 y++;
 631
 632         w = x2 - x;
 633         h = y - y2;
 634
 635         if (envmap)
 636         {
 637                 x = y2 = 0;
 638                 w = h = 256;
 639         }
 640
 641         glViewport (glx + x, gly + y2, w, h);
 642     screenaspect = (float)r_refdef.vrect.width/r_refdef.vrect.height;
 643 //      yfov = 2*atan((float)r_refdef.vrect.height/r_refdef.vrect.width)*180/M_PI;
 644 //      if (skyname[0]) // skybox enabled?
 645 //              MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  r_skyboxsize.value*1.732050807569 + 256); // this is size*sqrt(3) + 256
 646 //      else
 647                 MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  r_farclip.value);
 648
 649         glCullFace(GL_FRONT);
 650
 651         glMatrixMode(GL_MODELVIEW);
 652     glLoadIdentity ();
 653
 654     glRotatef (-90,  1, 0, 0);      // put Z going up
 655     glRotatef (90,  0, 0, 1);       // put Z going up
 656     glRotatef (-r_refdef.viewangles[2],  1, 0, 0);
 657     glRotatef (-r_refdef.viewangles[0],  0, 1, 0);
 658     glRotatef (-r_refdef.viewangles[1],  0, 0, 1);
 659     glTranslatef (-r_refdef.vieworg[0],  -r_refdef.vieworg[1],  -r_refdef.vieworg[2]);
 660
 661         glGetFloatv (GL_MODELVIEW_MATRIX, r_world_matrix);
 662
 663         //
 664         // set drawing parms
 665         //
 666 //      if (gl_cull.value)
 667                 glEnable(GL_CULL_FACE);
 668 //      else
 669 //              glDisable(GL_CULL_FACE);
 670
 671         glEnable(GL_BLEND); // was Disable
 672         glDisable(GL_ALPHA_TEST);
 673         glAlphaFunc(GL_GREATER, 0.5);
 674         glEnable(GL_DEPTH_TEST);
 675         glDepthMask(1);
 676         glShadeModel(GL_SMOOTH);
 677 }
 678
 679 /*
 680 =============
 681 R_Clear
 682 =============
 683 */
 684 void R_Clear (void)
 685 {
 686         if (!r_render.value)
 687                 return;
 688 //      glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // LordHavoc: moved to SCR_UpdateScreen
 689         gldepthmin = 0;
 690         gldepthmax = 1;
 691         glDepthFunc (GL_LEQUAL);
 692
 693         glDepthRange (gldepthmin, gldepthmax);
 694 }
 695
 696 // LordHavoc: my trick to *FIX* GLQuake lighting once and for all :)
 697 void GL_Brighten()
 698 {
 699         if (!r_render.value)
 700                 return;
 701         glMatrixMode(GL_PROJECTION);
 702     glLoadIdentity ();
 703         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 704         glMatrixMode(GL_MODELVIEW);
 705     glLoadIdentity ();
 706         glDisable (GL_DEPTH_TEST);
 707         glDisable (GL_CULL_FACE);
 708         glDisable(GL_TEXTURE_2D);
 709         glEnable(GL_BLEND);
 710         glBlendFunc (GL_DST_COLOR, GL_ONE);
 711         glBegin (GL_TRIANGLES);
 712         glColor3f (1, 1, 1);
 713         glVertex2f (-5000, -5000);
 714         glVertex2f (10000, -5000);
 715         glVertex2f (-5000, 10000);
 716         glEnd ();
 717         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 718         glDisable(GL_BLEND);
 719         glEnable(GL_TEXTURE_2D);
 720         glEnable (GL_DEPTH_TEST);
 721         glEnable (GL_CULL_FACE);
 722 }
 723
 724 extern cvar_t contrast;
 725 extern cvar_t brightness;
 726 extern cvar_t gl_lightmode;
 727
 728 void GL_BlendView()
 729 {
 730         if (!r_render.value)
 731                 return;
 732         glMatrixMode(GL_PROJECTION);
 733     glLoadIdentity ();
 734         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
 735         glMatrixMode(GL_MODELVIEW);
 736     glLoadIdentity ();
 737         glDisable (GL_DEPTH_TEST);
 738         glDisable (GL_CULL_FACE);
 739         glDisable(GL_TEXTURE_2D);
 740         glEnable(GL_BLEND);
 741         if (lighthalf)
 742         {
 743                 glBlendFunc (GL_DST_COLOR, GL_ONE);
 744                 glBegin (GL_TRIANGLES);
 745                 glColor3f (1, 1, 1);
 746                 glVertex2f (-5000, -5000);
 747                 glVertex2f (10000, -5000);
 748                 glVertex2f (-5000, 10000);
 749                 glEnd ();
 750         }
 751         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 752         contrast.value = bound(0.2, contrast.value, 1.0);
 753         if (/*gl_polyblend.value && */v_blend[3])
 754         {
 755                 glBegin (GL_TRIANGLES);
 756                 glColor4fv (v_blend);
 757                 glVertex2f (-5000, -5000);
 758                 glVertex2f (10000, -5000);
 759                 glVertex2f (-5000, 10000);
 760                 glEnd ();
 761         }
 762
 763         glEnable (GL_CULL_FACE);
 764         glEnable (GL_DEPTH_TEST);
 765         glDisable(GL_BLEND);
 766         glEnable(GL_TEXTURE_2D);
 767 }
 768
 769 #define TIMEREPORT(VAR) \
 770         if (r_speeds2.value)\
 771         {\
 772                 temptime = currtime;\
 773                 currtime = Sys_FloatTime();\
 774                 VAR = (int) ((currtime - temptime) * 1000000.0);\
 775         }\
 776         else\
 777                 VAR = 0;
 778
 779 /*
 780 ================
 781 R_RenderView
 782
 783 r_refdef must be set before the first call
 784 ================
 785 */
 786 extern qboolean intimerefresh;
 787 extern qboolean skyisvisible;
 788 extern void R_Sky();
 789 extern void UploadLightmaps();
 790 char r_speeds2_string1[81], r_speeds2_string2[81], r_speeds2_string3[81], r_speeds2_string4[81], r_speeds2_string5[81], r_speeds2_string6[81], r_speeds2_string7[81];
 791 void R_RenderView (void)
 792 {
 793         double starttime, currtime, temptime;
 794         int time_clear, time_setup, time_world, time_bmodels, time_upload, time_sky, time_wall, time_models, time_moveparticles, time_drawparticles, time_moveexplosions, time_drawexplosions, time_drawdecals, time_transpoly, time_blend, time_total;
 795 //      if (r_norefresh.value)
 796 //              return;
 797
 798         if (!r_worldentity.render.model || !cl.worldmodel)
 799                 Host_Error ("R_RenderView: NULL worldmodel");
 800
 801         lighthalf = gl_lightmode.value;
 802
 803         FOG_framebegin();
 804
 805         if (r_speeds2.value)
 806         {
 807                 starttime = currtime = Sys_FloatTime();
 808         }
 809         else
 810                 starttime = currtime = 0;
 811         R_Clear();
 812         skyisvisible = false;
 813         TIMEREPORT(time_clear)
 814
 815         // render normal view
 816
 817         R_SetupFrame ();
 818         R_SetFrustum ();
 819         R_SetupGL ();
 820
 821         R_PrepareEntities();
 822
 823         skypolyclear();
 824         wallpolyclear();
 825         transpolyclear();
 826
 827         TIMEREPORT(time_setup)
 828
 829         R_MarkLeaves ();        // done here so we know if we're in water
 830         R_DrawWorld ();         // adds static entities to the list
 831         TIMEREPORT(time_world)
 832         R_DrawEntitiesOnList1 (); // BSP models
 833         TIMEREPORT(time_bmodels)
 834
 835         UploadLightmaps();
 836         TIMEREPORT(time_upload)
 837
 838         skypolyrender(); // fogged sky polys, affects depth
 839
 840         if (skyname[0] && skyisvisible && !fogenabled)
 841                 R_Sky(); // does not affect depth, draws over the sky polys
 842         TIMEREPORT(time_sky)
 843
 844         wallpolyrender();
 845         TIMEREPORT(time_wall)
 846
 847         if (!intimerefresh && !r_speeds2.value)
 848                 S_ExtraUpdate ();       // don't let sound get messed up if going slow
 849
 850         R_DrawEntitiesOnList2 (); // other models
 851 //      R_RenderDlights ();
 852         R_DrawViewModel ();
 853         TIMEREPORT(time_models)
 854         R_MoveParticles ();
 855         TIMEREPORT(time_moveparticles)
 856         R_DrawParticles ();
 857         TIMEREPORT(time_drawparticles)
 858         R_MoveExplosions();
 859         TIMEREPORT(time_moveexplosions)
 860         R_DrawExplosions();
 861         TIMEREPORT(time_drawexplosions)
 862         R_DrawDecals();
 863         TIMEREPORT(time_drawdecals)
 864
 865         transpolyrender();
 866         TIMEREPORT(time_transpoly)
 867
 868         FOG_frameend();
 869
 870         GL_BlendView();
 871         TIMEREPORT(time_blend)
 872         if (r_speeds2.value)
 873         {
 874                 time_total = (int) ((Sys_FloatTime() - starttime) * 1000000.0);
 875                 sprintf(r_speeds2_string1, "%6i walls %6i dlitwalls %7i modeltris %7i transpoly\n", c_brush_polys, c_light_polys, c_alias_polys, currenttranspoly);
 876                 sprintf(r_speeds2_string2, "BSP: %6i faces %6i nodes %6i leafs\n", c_faces, c_nodes, c_leafs);
 877                 sprintf(r_speeds2_string3, "%4i models %4i bmodels %4i sprites %5i particles %3i dlights\n", c_models, c_bmodels, c_sprites, c_particles, c_dlights);
 878                 sprintf(r_speeds2_string4, "%6ius clear  %6ius setup  %6ius world  %6ius bmodel %6ius upload", time_clear, time_setup, time_world, time_bmodels, time_upload);
 879                 sprintf(r_speeds2_string5, "%6ius sky    %6ius wall   %6ius models %6ius mpart  %6ius dpart ", time_sky, time_wall, time_models, time_moveparticles, time_drawparticles);
 880                 sprintf(r_speeds2_string6, "%6ius mexplo %6ius dexplo %6ius decals %6ius trans  %6ius blend ", time_moveexplosions, time_drawexplosions, time_drawdecals, time_transpoly, time_blend);
 881                 sprintf(r_speeds2_string7, "%6ius permdl %6ius total ", time_models / max(c_models, 1), time_total);
 882         }
 883 }