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;
  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        gl_cull = {"gl_cull","1"};
  86 //cvar_t        gl_affinemodels = {"gl_affinemodels","0"};
  87 //cvar_t        gl_polyblend = {"gl_polyblend","1"};
  88 //cvar_t        gl_flashblend = {"gl_flashblend","0"};
  89 cvar_t  gl_playermip = {"gl_playermip","0"};
  90 //cvar_t        gl_nocolors = {"gl_nocolors","0"};
  91 //cvar_t        gl_keeptjunctions = {"gl_keeptjunctions","1"};
  92 //cvar_t        gl_reporttjunctions = {"gl_reporttjunctions","0"};
  93 cvar_t  contrast = {"contrast", "1.0", TRUE}; // LordHavoc: a method of operating system independent color correction
  94 cvar_t  brightness = {"brightness", "1.0", TRUE}; // LordHavoc: a method of operating system independent color correction
  95 cvar_t  gl_lightmode = {"gl_lightmode", "1", TRUE}; // LordHavoc: overbright lighting
  96 //cvar_t        r_dynamicwater = {"r_dynamicwater", "1"};
  97 //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...
  98
  99 cvar_t  gl_fogenable = {"gl_fogenable", "0"};
 100 cvar_t  gl_fogdensity = {"gl_fogdensity", "0.25"};
 101 cvar_t  gl_fogred = {"gl_fogred","0.3"};
 102 cvar_t  gl_foggreen = {"gl_foggreen","0.3"};
 103 cvar_t  gl_fogblue = {"gl_fogblue","0.3"};
 104 cvar_t  gl_fogstart = {"gl_fogstart", "0"};
 105 cvar_t  gl_fogend = {"gl_fogend","0"};
 106 cvar_t  glfog = {"glfog", "0"};
 107
 108 int chrometexture;
 109
 110 void makechrometextures()
 111 {
 112         int x, y, g, g2, amplitude, noise[64][64], min, max;
 113         byte data[64][64][4];
 114         //
 115         // particle texture
 116         //
 117         chrometexture = texture_extension_number++;
 118     glBindTexture(GL_TEXTURE_2D, chrometexture);
 119
 120 #define n(x,y) noise[(y)&63][(x)&63]
 121
 122         amplitude = 16777215;
 123         g2 = 64;
 124         noise[0][0] = 0;
 125         for (;(g = g2 >> 1) >= 1;g2 >>= 1)
 126         {
 127                 // subdivide, diamond-square algorythm (really this has little to do with squares)
 128                 // diamond
 129                 for (y = 0;y < 64;y += g2)
 130                         for (x = 0;x < 64;x += g2)
 131                                 n(x+g,y+g) = (n(x,y) + n(x+g2,y) + n(x,y+g2) + n(x+g2,y+g2)) >> 2;
 132                 // square
 133                 for (y = 0;y < 64;y += g2)
 134                         for (x = 0;x < 64;x += g2)
 135                         {
 136                                 n(x+g,y) = (n(x,y) + n(x+g2,y) + n(x+g,y-g) + n(x+g,y+g)) >> 2;
 137                                 n(x,y+g) = (n(x,y) + n(x,y+g2) + n(x-g,y+g) + n(x+g,y+g)) >> 2;
 138                         }
 139                 // brownian motion theory
 140                 amplitude >>= 1;
 141                 for (y = 0;y < 64;y += g)
 142                         for (x = 0;x < 64;x += g)
 143                                 noise[y][x] += rand()&amplitude;
 144         }
 145         // normalize the noise range
 146         min = max = 0;
 147         for (y = 0;y < 64;y++)
 148                 for (x = 0;x < 64;x++)
 149                 {
 150                         if (n(x,y) < min) min = n(x,y);
 151                         if (n(x,y) > max) max = n(x,y);
 152                 }
 153         max -= min;
 154         for (y = 0;y < 64;y++)
 155                 for (x = 0;x < 64;x++)
 156                         n(x,y) = (n(x,y) - min) * 255 / max;
 157
 158 #undef n
 159
 160         // convert to RGBA data
 161         for (y = 0;y < 64;y++)
 162                 for (x = 0;x < 64;x++)
 163                 {
 164                         data[y][x][0] = data[y][x][1] = data[y][x][2] = (byte) noise[y][x];
 165                         data[y][x][3] = 255;
 166                 }
 167
 168         glTexImage2D (GL_TEXTURE_2D, 0, 4, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
 169
 170         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 171
 172         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 173         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 174 }
 175
 176 extern qboolean isRagePro;
 177
 178 qboolean lighthalf;
 179
 180 vec3_t fogcolor;
 181 vec_t fogdensity;
 182 float fog_density, fog_red, fog_green, fog_blue;
 183 qboolean fogenabled;
 184 qboolean oldgl_fogenable;
 185 void FOG_framebegin()
 186 {
 187         if (nehahra)
 188         {
 189 //              if (!Nehahrademcompatibility)
 190 //                      gl_fogenable.value = 0;
 191                 if (gl_fogenable.value)
 192                 {
 193                         oldgl_fogenable = true;
 194                         fog_density = gl_fogdensity.value;
 195                         fog_red = gl_fogred.value;
 196                         fog_green = gl_foggreen.value;
 197                         fog_blue = gl_fogblue.value;
 198                 }
 199                 else if (oldgl_fogenable)
 200                 {
 201                         oldgl_fogenable = false;
 202                         fog_density = 0;
 203                         fog_red = 0;
 204                         fog_green = 0;
 205                         fog_blue = 0;
 206                 }
 207         }
 208         if (glfog.value)
 209         {
 210                 if(fog_density)
 211                 {
 212                         // LordHavoc: Borland C++ 5.0 was choking on this line, stupid compiler...
 213                         //GLfloat colors[4] = {(GLfloat) gl_fogred.value, (GLfloat) gl_foggreen.value, (GLfloat) gl_fogblue.value, (GLfloat) 1};
 214                         GLfloat colors[4];
 215                         colors[0] = fog_red;
 216                         colors[1] = fog_green;
 217                         colors[2] = fog_blue;
 218                         colors[3] = 1;
 219                         if (lighthalf)
 220                         {
 221                                 colors[0] *= 0.5f;
 222                                 colors[1] *= 0.5f;
 223                                 colors[2] *= 0.5f;
 224                         }
 225
 226                         glFogi (GL_FOG_MODE, GL_EXP2);
 227                         glFogf (GL_FOG_DENSITY, (GLfloat) fog_density / 100);
 228                         glFogfv (GL_FOG_COLOR, colors);
 229                         glEnable (GL_FOG);
 230                 }
 231                 else
 232                         glDisable(GL_FOG);
 233         }
 234         else
 235         {
 236                 if (fog_density)
 237                 {
 238                         fogenabled = true;
 239                         fogdensity = -4000.0f / (fog_density * fog_density);
 240                         fogcolor[0] = fog_red   = bound(0.0f, fog_red  , 1.0f);
 241                         fogcolor[1] = fog_green = bound(0.0f, fog_green, 1.0f);
 242                         fogcolor[2] = fog_blue  = bound(0.0f, fog_blue , 1.0f);
 243                         if (lighthalf)
 244                         {
 245                                 fogcolor[0] *= 0.5f;
 246                                 fogcolor[1] *= 0.5f;
 247                                 fogcolor[2] *= 0.5f;
 248                         }
 249                 }
 250                 else
 251                         fogenabled = false;
 252         }
 253 }
 254
 255 void FOG_frameend()
 256 {
 257         if (glfog.value)
 258                 glDisable(GL_FOG);
 259 }
 260
 261 void FOG_clear()
 262 {
 263         if (nehahra)
 264         {
 265                 Cvar_Set("gl_fogenable", "0");
 266                 Cvar_Set("gl_fogdensity", "0.2");
 267                 Cvar_Set("gl_fogred", "0.3");
 268                 Cvar_Set("gl_foggreen", "0.3");
 269                 Cvar_Set("gl_fogblue", "0.3");
 270         }
 271         fog_density = fog_red = fog_green = fog_blue = 0.0f;
 272 }
 273
 274 void FOG_registercvars()
 275 {
 276         Cvar_RegisterVariable (&glfog);
 277         if (nehahra)
 278         {
 279                 Cvar_RegisterVariable (&gl_fogenable);
 280                 Cvar_RegisterVariable (&gl_fogdensity);
 281                 Cvar_RegisterVariable (&gl_fogred);
 282                 Cvar_RegisterVariable (&gl_foggreen);
 283                 Cvar_RegisterVariable (&gl_fogblue);
 284                 Cvar_RegisterVariable (&gl_fogstart);
 285                 Cvar_RegisterVariable (&gl_fogend);
 286         }
 287 }
 288
 289 void glpoly_init();
 290 void glrsurf_init();
 291 void rlight_init();
 292
 293 // LordHavoc: vertex array
 294 float *aliasvert;
 295 float *aliasvertnorm;
 296 byte *aliasvertcolor;
 297
 298 void rmain_registercvars()
 299 {
 300         // allocate vertex processing arrays
 301         aliasvert = malloc(sizeof(float[MD2MAX_VERTS][3]));
 302         aliasvertnorm = malloc(sizeof(float[MD2MAX_VERTS][3]));
 303         aliasvertcolor = malloc(sizeof(byte[MD2MAX_VERTS][4]));
 304
 305         FOG_registercvars();
 306         Cvar_RegisterVariable (&r_speeds2);
 307         Cvar_RegisterVariable (&contrast);
 308         Cvar_RegisterVariable (&brightness);
 309         Cvar_RegisterVariable (&gl_lightmode);
 310 //      Cvar_RegisterVariable (&r_dynamicwater);
 311 //      Cvar_RegisterVariable (&r_dynamicbothsides);
 312         Cvar_RegisterVariable (&r_fullbrights);
 313         if (nehahra)
 314                 Cvar_SetValue("r_fullbrights", 0);
 315 //      if (gl_vendor && strstr(gl_vendor, "3Dfx"))
 316 //              gl_lightmode.value = 0;
 317         Cvar_RegisterVariable (&r_fullbright);
 318         makechrometextures();
 319         glpoly_init();
 320         glrsurf_init();
 321         rlight_init();
 322 }
 323
 324 /*
 325 void R_RotateForEntity (entity_t *e)
 326 {
 327         glTranslatef (e->origin[0],  e->origin[1],  e->origin[2]);
 328
 329         glRotatef (e->angles[1],  0, 0, 1);
 330         glRotatef (-e->angles[0],  0, 1, 0);
 331         glRotatef (e->angles[2],  1, 0, 0);
 332
 333         glScalef (e->scale, e->scale, e->scale); // LordHavoc: model scale
 334 }
 335 */
 336
 337 // LordHavoc: if not for the fact BRIGHTFIELD particles require this, it would be removed...
 338 #define NUMVERTEXNORMALS        162
 339
 340 float   r_avertexnormals[NUMVERTEXNORMALS][3] = {
 341 #include "anorms.h"
 342 };
 343
 344 // LordHavoc: moved this shading stuff up because the sprites need shading stuff
 345 vec3_t  shadevector;
 346 vec3_t  shadecolor;
 347
 348 float   modelalpha;
 349
 350 void R_LightPoint (vec3_t color, vec3_t p);
 351 void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
 352 void R_DynamicLightPointNoMask(vec3_t color, vec3_t org);
 353
 354 float R_CalcAnimLerp(int pose, float lerpscale)
 355 {
 356         if (currententity->draw_lastmodel == currententity->model && currententity->draw_lerpstart <= cl.time)
 357         {
 358                 if (pose != currententity->draw_pose)
 359                 {
 360                         currententity->draw_lastpose = currententity->draw_pose;
 361                         currententity->draw_pose = pose;
 362                         currententity->draw_lerpstart = cl.time;
 363                         return 0;
 364                 }
 365                 else
 366                         return ((cl.time - currententity->draw_lerpstart) * lerpscale);
 367         }
 368         else // uninitialized
 369         {
 370                 currententity->draw_lastmodel = currententity->model;
 371                 currententity->draw_lastpose = currententity->draw_pose = pose;
 372                 currententity->draw_lerpstart = cl.time;
 373                 return 0;
 374         }
 375 }
 376
 377 /*
 378 =============================================================
 379
 380   SPRITE MODELS
 381
 382 =============================================================
 383 */
 384
 385 /*
 386 ================
 387 R_GetSpriteFrame
 388 ================
 389 */
 390 void R_GetSpriteFrame (entity_t *currententity, mspriteframe_t **oldframe, mspriteframe_t **newframe, float *framelerp)
 391 {
 392         msprite_t               *psprite;
 393         mspritegroup_t  *pspritegroup;
 394         int                             i, j, numframes, frame;
 395         float                   *pintervals, fullinterval, targettime, time, jtime, jinterval;
 396
 397         psprite = currententity->model->cache.data;
 398         frame = currententity->frame;
 399
 400         if ((frame >= psprite->numframes) || (frame < 0))
 401         {
 402                 Con_Printf ("R_DrawSprite: no such frame %d\n", frame);
 403                 frame = 0;
 404         }
 405
 406         if (psprite->frames[frame].type == SPR_SINGLE)
 407         {
 408                 if (currententity->draw_lastmodel == currententity->model && currententity->draw_lerpstart < cl.time)
 409                 {
 410                         if (frame != currententity->draw_pose)
 411                         {
 412                                 currententity->draw_lastpose = currententity->draw_pose;
 413                                 currententity->draw_pose = frame;
 414                                 currententity->draw_lerpstart = cl.time;
 415                                 *framelerp = 0;
 416                         }
 417                         else
 418                                 *framelerp = (cl.time - currententity->draw_lerpstart) * 10.0;
 419                 }
 420                 else // uninitialized
 421                 {
 422                         currententity->draw_lastmodel = currententity->model;
 423                         currententity->draw_lastpose = currententity->draw_pose = frame;
 424                         currententity->draw_lerpstart = cl.time;
 425                         *framelerp = 0;
 426                 }
 427                 *oldframe = psprite->frames[currententity->draw_lastpose].frameptr;
 428                 *newframe = psprite->frames[frame].frameptr;
 429         }
 430         else
 431         {
 432                 pspritegroup = (mspritegroup_t *)psprite->frames[frame].frameptr;
 433                 pintervals = pspritegroup->intervals;
 434                 numframes = pspritegroup->numframes;
 435                 fullinterval = pintervals[numframes-1];
 436
 437                 time = cl.time + currententity->syncbase;
 438
 439         // when loading in Mod_LoadSpriteGroup, we guaranteed all interval values
 440         // are positive, so we don't have to worry about division by 0
 441                 targettime = time - ((int)(time / fullinterval)) * fullinterval;
 442
 443                 // LordHavoc: since I can't measure the time properly when it loops from numframes-1 to 0,
 444                 //            I instead measure the time of the first frame, hoping it is consistent
 445                 j = numframes-1;jtime = 0;jinterval = pintervals[1] - pintervals[0];
 446                 for (i=0 ; i<(numframes-1) ; i++)
 447                 {
 448                         if (pintervals[i] > targettime)
 449                                 break;
 450                         j = i;jinterval = pintervals[i] - jtime;jtime = pintervals[i];
 451                 }
 452                 *framelerp = (targettime - jtime) / jinterval;
 453
 454                 *oldframe = pspritegroup->frames[j];
 455                 *newframe = pspritegroup->frames[i];
 456         }
 457 }
 458
 459 void GL_DrawSpriteImage (mspriteframe_t *frame, vec3_t origin, vec3_t up, vec3_t right, int red, int green, int blue, int alpha)
 460 {
 461         // LordHavoc: rewrote this to use the transparent poly system
 462         transpolybegin(frame->gl_texturenum, 0, frame->gl_fogtexturenum, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 463         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);
 464         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);
 465         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);
 466         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);
 467         transpolyend();
 468 }
 469
 470 extern qboolean isG200, isRagePro, lighthalf;
 471
 472 /*
 473 =================
 474 R_DrawSpriteModel
 475
 476 =================
 477 */
 478 void R_DrawSpriteModel (entity_t *e)
 479 {
 480         mspriteframe_t  *oldframe, *newframe;
 481         float           *up, *right, lerp, ilerp;
 482         vec3_t          v_forward, v_right, v_up, org;
 483         msprite_t               *psprite;
 484
 485         // don't even bother culling, because it's just a single
 486         // polygon without a surface cache
 487         R_GetSpriteFrame (e, &oldframe, &newframe, &lerp);
 488         if (lerp < 0) lerp = 0;
 489         if (lerp > 1) lerp = 1;
 490         if (isRagePro) // LordHavoc: no alpha scaling supported on per pixel alpha images on ATI Rage Pro... ACK!
 491                 lerp = 1;
 492         ilerp = 1.0 - lerp;
 493         psprite = e->model->cache.data;
 494
 495         if (psprite->type == SPR_ORIENTED)
 496         {       // bullet marks on walls
 497                 AngleVectors (e->angles, v_forward, v_right, v_up);
 498                 up = v_up;
 499                 right = v_right;
 500                 VectorSubtract(e->origin, vpn, org);
 501         }
 502         else
 503         {       // normal sprite
 504                 up = vup;
 505                 right = vright;
 506                 VectorCopy(e->origin, org);
 507         }
 508         if (e->scale != 1)
 509         {
 510                 VectorScale(up, e->scale, up);
 511                 VectorScale(right, e->scale, right);
 512         }
 513
 514         if (e->model->flags & EF_FULLBRIGHT || e->effects & EF_FULLBRIGHT)
 515         {
 516                 if (lighthalf)
 517                 {
 518                         shadecolor[0] = e->colormod[0] * 128;
 519                         shadecolor[1] = e->colormod[1] * 128;
 520                         shadecolor[2] = e->colormod[2] * 128;
 521                 }
 522                 else
 523                 {
 524                         shadecolor[0] = e->colormod[0] * 255;
 525                         shadecolor[1] = e->colormod[1] * 255;
 526                         shadecolor[2] = e->colormod[2] * 255;
 527                 }
 528         }
 529         else
 530         {
 531                 R_LightPoint (shadecolor, e->origin);
 532                 R_DynamicLightPointNoMask(shadecolor, e->origin);
 533                 if (lighthalf)
 534                 {
 535                         shadecolor[0] *= e->colormod[0] * 0.5;
 536                         shadecolor[1] *= e->colormod[1] * 0.5;
 537                         shadecolor[2] *= e->colormod[2] * 0.5;
 538                 }
 539         }
 540
 541         // LordHavoc: interpolated sprite rendering
 542         if (ilerp != 0)
 543                 GL_DrawSpriteImage(oldframe, org, up, right, shadecolor[0],shadecolor[1],shadecolor[2],e->alpha*255*ilerp);
 544         if (lerp != 0)
 545                 GL_DrawSpriteImage(newframe, org, up, right, shadecolor[0],shadecolor[1],shadecolor[2],e->alpha*255*lerp);
 546 }
 547
 548 /*
 549 =============================================================
 550
 551   ALIAS MODELS
 552
 553 =============================================================
 554 */
 555
 556 extern vec3_t softwaretransform_x;
 557 extern vec3_t softwaretransform_y;
 558 extern vec3_t softwaretransform_z;
 559 extern vec_t softwaretransform_scale;
 560 extern vec3_t softwaretransform_offset;
 561 void R_AliasLerpVerts(int vertcount, float lerp, trivert2 *verts1, vec3_t scale1, vec3_t translate1, trivert2 *verts2, vec3_t scale2, vec3_t translate2)
 562 {
 563         int i;
 564         vec3_t point, matrix_x, matrix_y, matrix_z;
 565         float *av, *avn;
 566         av = aliasvert;
 567         avn = aliasvertnorm;
 568         if (lerp < 0) lerp = 0;
 569         if (lerp > 1) lerp = 1;
 570         if (lerp != 0)
 571         {
 572                 float ilerp, ilerp127, lerp127, scalex1, scalex2, translatex, scaley1, scaley2, translatey, scalez1, scalez2, translatez;
 573                 if (lerp < 0) lerp = 0;
 574                 if (lerp > 1) lerp = 1;
 575                 ilerp = 1 - lerp;
 576                 ilerp127 = ilerp * (1.0 / 127.0);
 577                 lerp127 = lerp * (1.0 / 127.0);
 578                 VectorScale(softwaretransform_x, softwaretransform_scale, matrix_x);
 579                 VectorScale(softwaretransform_y, softwaretransform_scale, matrix_y);
 580                 VectorScale(softwaretransform_z, softwaretransform_scale, matrix_z);
 581                 // calculate combined interpolation variables
 582                 scalex1 = scale1[0] * ilerp;scalex2 = scale2[0] *  lerp;translatex = translate1[0] * ilerp + translate2[0] *  lerp;
 583                 scaley1 = scale1[1] * ilerp;scaley2 = scale2[1] *  lerp;translatey = translate1[1] * ilerp + translate2[1] *  lerp;
 584                 scalez1 = scale1[2] * ilerp;scalez2 = scale2[2] *  lerp;translatez = translate1[2] * ilerp + translate2[2] *  lerp;
 585                 // generate vertices
 586                 for (i = 0;i < vertcount;i++)
 587                 {
 588                         // rotate, scale, and translate the vertex locations
 589                         point[0] = verts1->v[0] * scalex1 + verts2->v[0] * scalex2 + translatex;
 590                         point[1] = verts1->v[1] * scaley1 + verts2->v[1] * scaley2 + translatey;
 591                         point[2] = verts1->v[2] * scalez1 + verts2->v[2] * scalez2 + translatez;
 592                         *av++ = point[0] * matrix_x[0] + point[1] * matrix_y[0] + point[2] * matrix_z[0] + softwaretransform_offset[0];
 593                         *av++ = point[0] * matrix_x[1] + point[1] * matrix_y[1] + point[2] * matrix_z[1] + softwaretransform_offset[1];
 594                         *av++ = point[0] * matrix_x[2] + point[1] * matrix_y[2] + point[2] * matrix_z[2] + softwaretransform_offset[2];
 595                         // rotate the normals
 596                         point[0] = verts1->n[0] * ilerp127 + verts2->n[0] * lerp127;
 597                         point[1] = verts1->n[1] * ilerp127 + verts2->n[1] * lerp127;
 598                         point[2] = verts1->n[2] * ilerp127 + verts2->n[2] * lerp127;
 599                         *avn++ = point[0] * softwaretransform_x[0] + point[1] * softwaretransform_y[0] + point[2] * softwaretransform_z[0];
 600                         *avn++ = point[0] * softwaretransform_x[1] + point[1] * softwaretransform_y[1] + point[2] * softwaretransform_z[1];
 601                         *avn++ = point[0] * softwaretransform_x[2] + point[1] * softwaretransform_y[2] + point[2] * softwaretransform_z[2];
 602                         verts1++;verts2++;
 603                 }
 604         }
 605         else
 606         {
 607                 float i127;
 608                 i127 = 1.0f / 127.0f;
 609                 VectorScale(softwaretransform_x, softwaretransform_scale, matrix_x);
 610                 VectorScale(softwaretransform_y, softwaretransform_scale, matrix_y);
 611                 VectorScale(softwaretransform_z, softwaretransform_scale, matrix_z);
 612                 // generate vertices
 613                 for (i = 0;i < vertcount;i++)
 614                 {
 615                         // rotate, scale, and translate the vertex locations
 616                         point[0] = verts1->v[0] * scale1[0] + translate1[0];
 617                         point[1] = verts1->v[1] * scale1[1] + translate1[1];
 618                         point[2] = verts1->v[2] * scale1[2] + translate1[2];
 619                         *av++ = point[0] * matrix_x[0] + point[1] * matrix_y[0] + point[2] * matrix_z[0] + softwaretransform_offset[0];
 620                         *av++ = point[0] * matrix_x[1] + point[1] * matrix_y[1] + point[2] * matrix_z[1] + softwaretransform_offset[1];
 621                         *av++ = point[0] * matrix_x[2] + point[1] * matrix_y[2] + point[2] * matrix_z[2] + softwaretransform_offset[2];
 622                         // rotate the normals
 623                         point[0] = verts1->n[0] * i127;
 624                         point[1] = verts1->n[1] * i127;
 625                         point[2] = verts1->n[2] * i127;
 626                         *avn++ = point[0] * softwaretransform_x[0] + point[1] * softwaretransform_y[0] + point[2] * softwaretransform_z[0];
 627                         *avn++ = point[0] * softwaretransform_x[1] + point[1] * softwaretransform_y[1] + point[2] * softwaretransform_z[1];
 628                         *avn++ = point[0] * softwaretransform_x[2] + point[1] * softwaretransform_y[2] + point[2] * softwaretransform_z[2];
 629                         verts1++;
 630                 }
 631         }
 632 }
 633
 634 /*
 635 =================
 636 R_DrawAliasFrame
 637
 638 =================
 639 */
 640 extern vec3_t lightspot;
 641 void R_LightModel(int numverts, vec3_t center);
 642 extern cvar_t gl_vertexarrays;
 643 void R_DrawAliasFrame (aliashdr_t *paliashdr)
 644 {
 645         int                             i, pose, frame = currententity->frame;
 646         float                   lerpscale, lerp;
 647
 648         softwaretransformforentity(currententity);
 649
 650         if ((frame >= paliashdr->numframes) || (frame < 0))
 651         {
 652                 Con_DPrintf ("R_AliasSetupFrame: no such frame %d\n", frame);
 653                 frame = 0;
 654         }
 655
 656         pose = paliashdr->frames[frame].firstpose;
 657
 658         if (paliashdr->frames[frame].numposes > 1)
 659         {
 660                 lerpscale = 1.0 / paliashdr->frames[frame].interval;
 661                 pose += (int)(cl.time * lerpscale) % paliashdr->frames[frame].numposes;
 662         }
 663         else
 664                 lerpscale = 10.0;
 665
 666         lerp = R_CalcAnimLerp(pose, lerpscale);
 667
 668         R_AliasLerpVerts(paliashdr->numverts, lerp, (trivert2 *)((byte *)paliashdr + paliashdr->posedata) + currententity->draw_lastpose * paliashdr->numverts, paliashdr->scale, paliashdr->scale_origin, (trivert2 *)((byte *)paliashdr + paliashdr->posedata) + currententity->draw_pose * paliashdr->numverts, paliashdr->scale, paliashdr->scale_origin);
 669
 670         R_LightModel(paliashdr->numverts, currententity->origin);
 671
 672         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 673         glShadeModel(GL_SMOOTH);
 674         if (currententity->effects & EF_ADDITIVE)
 675         {
 676                 glBlendFunc(GL_SRC_ALPHA, GL_ONE); // additive rendering
 677                 glEnable(GL_BLEND);
 678                 glDepthMask(0);
 679         }
 680         else if (modelalpha != 1.0)
 681         {
 682                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 683                 glEnable(GL_BLEND);
 684                 glDepthMask(0);
 685         }
 686         else
 687         {
 688                 glDisable(GL_BLEND);
 689                 glDepthMask(1);
 690         }
 691
 692         if (gl_vertexarrays.value)
 693         {
 694                 // LordHavoc: I would use InterleavedArrays here,
 695                 // but the texture coordinates are a seperate array,
 696                 // and it would be wasteful to copy them into the main array...
 697         //      glColor4f(shadecolor[0], shadecolor[1], shadecolor[2], modelalpha);
 698                 qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 699                 qglColorPointer(4, GL_UNSIGNED_BYTE, 0, aliasvertcolor);
 700                 glEnableClientState(GL_VERTEX_ARRAY);
 701                 glEnableClientState(GL_COLOR_ARRAY);
 702
 703                 // draw the front faces
 704                 qglTexCoordPointer(2, GL_FLOAT, 0, (void *)((int) paliashdr->texcoords + (int) paliashdr));
 705                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 706                 qglDrawElements(GL_TRIANGLES, paliashdr->frontfaces * 3, GL_UNSIGNED_SHORT, (void *)((int) paliashdr->vertindices + (int) paliashdr));
 707                 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 708
 709                 // draw the back faces
 710                 qglTexCoordPointer(2, GL_FLOAT, 0, (void *)((int) paliashdr->texcoords + sizeof(float[2]) * paliashdr->numverts + (int) paliashdr));
 711                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 712                 qglDrawElements(GL_TRIANGLES, paliashdr->backfaces * 3, GL_UNSIGNED_SHORT, (void *)((int) paliashdr->vertindices + sizeof(unsigned short[3]) * paliashdr->frontfaces + (int) paliashdr));
 713                 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 714
 715                 glDisableClientState(GL_COLOR_ARRAY);
 716                 glDisableClientState(GL_VERTEX_ARRAY);
 717         }
 718         else
 719         {
 720                 unsigned short *in, index;
 721                 float *tex;
 722                 in = (void *)((int) paliashdr->vertindices + (int) paliashdr);
 723                 glBegin(GL_TRIANGLES);
 724                 // draw the front faces
 725                 tex = (void *)((int) paliashdr->texcoords + (int) paliashdr);
 726                 //if (isG200)
 727                 //{
 728                         for (i = 0;i < paliashdr->frontfaces * 3;i++)
 729                         {
 730                                 index = *in++;
 731                                 glTexCoord2f(tex[index*2], tex[index*2+1]);
 732                                 glColor4f(aliasvertcolor[index*4] * (1.0f / 255.0f), aliasvertcolor[index*4+1] * (1.0f / 255.0f), aliasvertcolor[index*4+2] * (1.0f / 255.0f), aliasvertcolor[index*4+3] * (1.0f / 255.0f));
 733                                 glVertex3fv(&aliasvert[index*3]);
 734                         }
 735                 /*
 736                 }
 737                 else
 738                 {
 739                         for (i = 0;i < paliashdr->frontfaces * 3;i++)
 740                         {
 741                                 index = *in++;
 742                                 glTexCoord2f(tex[index*2], tex[index*2+1]);
 743                                 glColor4ub(aliasvertcolor[index*4], aliasvertcolor[index*4+1], aliasvertcolor[index*4+2], aliasvertcolor[index*4+3]);
 744                                 glVertex3fv(&aliasvert[index*3]);
 745                         }
 746                 }
 747                 */
 748                 // draw the back faces
 749                 tex += 2 * paliashdr->numverts;
 750                 //if (isG200)
 751                 //{
 752                         for (i = 0;i < paliashdr->backfaces * 3;i++)
 753                         {
 754                                 index = *in++;
 755                                 glTexCoord2f(tex[index*2], tex[index*2+1]);
 756                                 glColor4f(aliasvertcolor[index*4] * (1.0f / 255.0f), aliasvertcolor[index*4+1] * (1.0f / 255.0f), aliasvertcolor[index*4+2] * (1.0f / 255.0f), aliasvertcolor[index*4+3] * (1.0f / 255.0f));
 757                                 glVertex3fv(&aliasvert[index*3]);
 758                         }
 759                 /*
 760                 }
 761                 else
 762                 {
 763                         for (i = 0;i < paliashdr->backfaces * 3;i++)
 764                         {
 765                                 index = *in++;
 766                                 glTexCoord2f(tex[index*2], tex[index*2+1]);
 767                                 glColor4ub(aliasvertcolor[index*4], aliasvertcolor[index*4+1], aliasvertcolor[index*4+2], aliasvertcolor[index*4+3]);
 768                                 glVertex3fv(&aliasvert[index*3]);
 769                         }
 770                 }
 771                 */
 772                 glEnd();
 773         }
 774
 775         if (fogenabled)
 776         {
 777                 vec3_t diff;
 778                 glDisable (GL_TEXTURE_2D);
 779                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 780                 glEnable (GL_BLEND);
 781                 glDepthMask(0); // disable zbuffer updates
 782
 783                 VectorSubtract(currententity->origin, r_refdef.vieworg, diff);
 784                 glColor4f(fogcolor[0], fogcolor[1], fogcolor[2], exp(fogdensity/DotProduct(diff,diff)));
 785
 786                 if (gl_vertexarrays.value)
 787                 {
 788                         qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 789                         glEnableClientState(GL_VERTEX_ARRAY);
 790                         qglDrawElements(GL_TRIANGLES, paliashdr->numtris * 3, GL_UNSIGNED_SHORT, (void *)((int) paliashdr->vertindices + (int) paliashdr));
 791                         glDisableClientState(GL_VERTEX_ARRAY);
 792                 }
 793                 else
 794                 {
 795                         unsigned short *in;
 796                         in = (void *)((int) paliashdr->vertindices + (int) paliashdr);
 797                         glBegin(GL_TRIANGLES);
 798                         for (i = 0;i < paliashdr->numtris * 3;i++)
 799                                 glVertex3fv(&aliasvert[*in++ * 3]);
 800                         glEnd();
 801                 }
 802
 803                 glEnable (GL_TEXTURE_2D);
 804                 glColor3f (1,1,1);
 805         }
 806
 807         /*
 808         if (r_shadows.value && !(currententity->effects & EF_ADDITIVE) && currententity != &cl.viewent)
 809         {
 810                 // flatten it to make a shadow
 811                 float *av = aliasvert + 2, l = lightspot[2] + 0.125;
 812                 av = aliasvert + 2;
 813                 for (i = 0;i < paliashdr->numverts;i++, av+=3)
 814                         if (*av > l)
 815                                 *av = l;
 816                 glDisable (GL_TEXTURE_2D);
 817                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 818                 glEnable (GL_BLEND);
 819                 glDepthMask(0); // disable zbuffer updates
 820                 glColor4f (0,0,0,0.5 * modelalpha);
 821
 822                 if (gl_vertexarrays.value)
 823                 {
 824                         qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 825                         glEnableClientState(GL_VERTEX_ARRAY);
 826                         qglDrawElements(GL_TRIANGLES, paliashdr->numtris * 3, GL_UNSIGNED_SHORT, (void *)((int) paliashdr->vertindices + (int) paliashdr));
 827                         glDisableClientState(GL_VERTEX_ARRAY);
 828                 }
 829                 else
 830                 {
 831                         unsigned short *in;
 832                         in = (void *)((int) paliashdr->vertindices + (int) paliashdr);
 833                         glBegin(GL_TRIANGLES);
 834                         for (i = 0;i < paliashdr->numtris * 3;i++)
 835                                 glVertex3fv(&aliasvert[*in++ * 3]);
 836                         glEnd();
 837                 }
 838
 839                 glEnable (GL_TEXTURE_2D);
 840                 glColor3f (1,1,1);
 841         }
 842         */
 843
 844         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 845         glEnable (GL_BLEND);
 846         glDepthMask(1);
 847 }
 848
 849 /*
 850 =================
 851 R_DrawQ2AliasFrame
 852
 853 =================
 854 */
 855 void R_DrawQ2AliasFrame (md2mem_t *pheader)
 856 {
 857         int *order, count, frame = currententity->frame;
 858         float lerp;
 859         md2memframe_t *frame1, *frame2;
 860
 861         softwaretransformforentity(currententity);
 862
 863         if ((frame >= pheader->num_frames) || (frame < 0))
 864         {
 865                 Con_DPrintf ("R_SetupQ2AliasFrame: no such frame %d\n", frame);
 866                 frame = 0;
 867         }
 868
 869         lerp = R_CalcAnimLerp(frame, 10);
 870
 871         frame1 = (void *)((int) pheader + pheader->ofs_frames + (pheader->framesize * currententity->draw_lastpose));
 872         frame2 = (void *)((int) pheader + pheader->ofs_frames + (pheader->framesize * currententity->draw_pose));
 873         R_AliasLerpVerts(pheader->num_xyz, lerp, frame1->verts, frame1->scale, frame1->translate, frame2->verts, frame2->scale, frame2->translate);
 874
 875         R_LightModel(pheader->num_xyz, currententity->origin);
 876
 877         if (gl_vertexarrays.value)
 878         {
 879                 // LordHavoc: big mess...
 880                 // using arrays only slightly, although it is enough to prevent duplicates
 881                 // (saving half the transforms)
 882                 //glColor4f(shadecolor[0], shadecolor[1], shadecolor[2], modelalpha);
 883                 qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 884                 qglColorPointer(4, GL_UNSIGNED_BYTE, 0, aliasvertcolor);
 885                 glEnableClientState(GL_VERTEX_ARRAY);
 886                 glEnableClientState(GL_COLOR_ARRAY);
 887
 888                 order = (int *)((int)pheader + pheader->ofs_glcmds);
 889                 while(1)
 890                 {
 891                         if (!(count = *order++))
 892                                 break;
 893                         if (count > 0)
 894                                 glBegin(GL_TRIANGLE_STRIP);
 895                         else
 896                         {
 897                                 glBegin(GL_TRIANGLE_FAN);
 898                                 count = -count;
 899                         }
 900                         do
 901                         {
 902                                 glTexCoord2f(((float *)order)[0], ((float *)order)[1]);
 903                                 qglArrayElement(order[2]);
 904                                 order += 3;
 905                         }
 906                         while (count--);
 907                 }
 908
 909                 glDisableClientState(GL_COLOR_ARRAY);
 910                 glDisableClientState(GL_VERTEX_ARRAY);
 911         }
 912         else
 913         {
 914                 order = (int *)((int)pheader + pheader->ofs_glcmds);
 915                 while(1)
 916                 {
 917                         if (!(count = *order++))
 918                                 break;
 919                         if (count > 0)
 920                                 glBegin(GL_TRIANGLE_STRIP);
 921                         else
 922                         {
 923                                 glBegin(GL_TRIANGLE_FAN);
 924                                 count = -count;
 925                         }
 926                         //if (isG200)
 927                         //{
 928                                 do
 929                                 {
 930                                         glTexCoord2f(((float *)order)[0], ((float *)order)[1]);
 931                                         glColor4f(aliasvertcolor[order[2] * 4] * (1.0f / 255.0f), aliasvertcolor[order[2] * 4 + 1] * (1.0f / 255.0f), aliasvertcolor[order[2] * 4 + 2] * (1.0f / 255.0f), aliasvertcolor[order[2] * 4 + 3] * (1.0f / 255.0f));
 932                                         glVertex3fv(&aliasvert[order[2] * 3]);
 933                                         order += 3;
 934                                 }
 935                                 while (count--);
 936                         /*
 937                         }
 938                         else
 939                         {
 940                                 do
 941                                 {
 942                                         glTexCoord2f(((float *)order)[0], ((float *)order)[1]);
 943                                         glColor4ub(aliasvertcolor[order[2] * 4], aliasvertcolor[order[2] * 4 + 1], aliasvertcolor[order[2] * 4 + 2], aliasvertcolor[order[2] * 4 + 3]);
 944                                         glVertex3fv(&aliasvert[order[2] * 3]);
 945                                         order += 3;
 946                                 }
 947                                 while (count--);
 948                         }
 949                         */
 950                 }
 951         }
 952
 953         if (fogenabled)
 954         {
 955                 glDisable (GL_TEXTURE_2D);
 956                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 957                 glEnable (GL_BLEND);
 958                 glDepthMask(0); // disable zbuffer updates
 959                 {
 960                         vec3_t diff;
 961                         VectorSubtract(currententity->origin, r_refdef.vieworg, diff);
 962                         glColor4f(fogcolor[0], fogcolor[1], fogcolor[2], exp(fogdensity/DotProduct(diff,diff)));
 963                 }
 964
 965                 if (gl_vertexarrays.value)
 966                 {
 967                         // LordHavoc: big mess...
 968                         // using arrays only slightly, although it is enough to prevent duplicates
 969                         // (saving half the transforms)
 970                         //glColor4f(shadecolor[0], shadecolor[1], shadecolor[2], modelalpha);
 971                         qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 972                         glEnableClientState(GL_VERTEX_ARRAY);
 973
 974                         order = (int *)((int)pheader + pheader->ofs_glcmds);
 975                         while(1)
 976                         {
 977                                 if (!(count = *order++))
 978                                         break;
 979                                 if (count > 0)
 980                                         glBegin(GL_TRIANGLE_STRIP);
 981                                 else
 982                                 {
 983                                         glBegin(GL_TRIANGLE_FAN);
 984                                         count = -count;
 985                                 }
 986                                 do
 987                                 {
 988                                         qglArrayElement(order[2]);
 989                                         order += 3;
 990                                 }
 991                                 while (count--);
 992                         }
 993
 994                         glDisableClientState(GL_VERTEX_ARRAY);
 995                 }
 996                 else
 997                 {
 998                         order = (int *)((int)pheader + pheader->ofs_glcmds);
 999                         while(1)
1000                         {
1001                                 if (!(count = *order++))
1002                                         break;
1003                                 if (count > 0)
1004                                         glBegin(GL_TRIANGLE_STRIP);
1005                                 else
1006                                 {
1007                                         glBegin(GL_TRIANGLE_FAN);
1008                                         count = -count;
1009                                 }
1010                                 do
1011                                 {
1012                                         glVertex3fv(&aliasvert[order[2] * 3]);
1013                                         order += 3;
1014                                 }
1015                                 while (count--);
1016                         }
1017                 }
1018
1019                 glEnable (GL_TEXTURE_2D);
1020                 glColor3f (1,1,1);
1021         }
1022
1023         /*
1024         if (r_shadows.value && !(currententity->effects & EF_ADDITIVE) && currententity != &cl.viewent)
1025         {
1026                 int i;
1027                 float *av = aliasvert + 2, l = lightspot[2] + 0.125;
1028                 av = aliasvert + 2;
1029                 for (i = 0;i < pheader->num_xyz;i++, av+=3)
1030                         if (*av > l)
1031                                 *av = l;
1032                 glDisable (GL_TEXTURE_2D);
1033                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1034                 glEnable (GL_BLEND);
1035                 glDepthMask(0); // disable zbuffer updates
1036                 glColor4f (0,0,0,0.5 * modelalpha);
1037
1038                 if (gl_vertexarrays.value)
1039                 {
1040                         qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
1041                         glEnableClientState(GL_VERTEX_ARRAY);
1042
1043                         while(1)
1044                         {
1045                                 if (!(count = *order++))
1046                                         break;
1047                                 if (count > 0)
1048                                         glBegin(GL_TRIANGLE_STRIP);
1049                                 else
1050                                 {
1051                                         glBegin(GL_TRIANGLE_FAN);
1052                                         count = -count;
1053                                 }
1054                                 do
1055                                 {
1056                                         qglArrayElement(order[2]);
1057                                         order += 3;
1058                                 }
1059                                 while (count--);
1060                         }
1061
1062                         glDisableClientState(GL_VERTEX_ARRAY);
1063                 }
1064                 else
1065                 {
1066                         while(1)
1067                         {
1068                                 if (!(count = *order++))
1069                                         break;
1070                                 if (count > 0)
1071                                         glBegin(GL_TRIANGLE_STRIP);
1072                                 else
1073                                 {
1074                                         glBegin(GL_TRIANGLE_FAN);
1075                                         count = -count;
1076                                 }
1077                                 do
1078                                 {
1079                                         glVertex3fv(&aliasvert[order[2] * 3]);
1080                                         order += 3;
1081                                 }
1082                                 while (count--);
1083                         }
1084                 }
1085
1086                 glEnable (GL_TEXTURE_2D);
1087                 glColor3f (1,1,1);
1088         }
1089         */
1090
1091         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1092         glEnable (GL_BLEND);
1093         glDepthMask(1);
1094 }
1095
1096 /*
1097 =================
1098 R_DrawAliasModel
1099
1100 =================
1101 */
1102 void R_DrawAliasModel (entity_t *e, int cull)
1103 {
1104         int                     i;
1105         model_t         *clmodel;
1106         vec3_t          mins, maxs;
1107         aliashdr_t      *paliashdr;
1108         md2mem_t                *pheader;
1109         int                     anim;
1110
1111         if (modelalpha < (1.0 / 64.0))
1112                 return; // basically completely transparent
1113
1114         clmodel = currententity->model;
1115
1116         VectorAdd (currententity->origin, clmodel->mins, mins);
1117         VectorAdd (currententity->origin, clmodel->maxs, maxs);
1118
1119         if (cull && R_CullBox (mins, maxs))
1120                 return;
1121
1122         VectorCopy (currententity->origin, r_entorigin);
1123         VectorSubtract (r_origin, r_entorigin, modelorg);
1124
1125         // get lighting information
1126
1127         if (currententity->model->flags & EF_FULLBRIGHT || currententity->effects & EF_FULLBRIGHT)
1128         {
1129                 shadecolor[0] = currententity->colormod[0] * 256;
1130                 shadecolor[1] = currententity->colormod[1] * 256;
1131                 shadecolor[2] = currententity->colormod[2] * 256;
1132         }
1133         else
1134         {
1135                 R_LightPoint (shadecolor, currententity->origin);
1136
1137                 // HACK HACK HACK -- no fullbright colors, so make torches full light
1138                 if (!strcmp (currententity->model->name, "progs/flame2.mdl") || !strcmp (currententity->model->name, "progs/flame.mdl") )
1139                         shadecolor[0] = shadecolor[1] = shadecolor[2] = 128;
1140
1141                 shadecolor[0] *= currententity->colormod[0];
1142                 shadecolor[1] *= currententity->colormod[1];
1143                 shadecolor[2] *= currententity->colormod[2];
1144         }
1145
1146         // locate the proper data
1147         if (clmodel->aliastype == ALIASTYPE_MD2)
1148         {
1149                 pheader = (void *)Mod_Extradata (currententity->model);
1150                 c_alias_polys += pheader->num_tris;
1151         }
1152         else
1153         {
1154                 paliashdr = (void *)Mod_Extradata (currententity->model);
1155                 c_alias_polys += paliashdr->numtris;
1156         }
1157
1158         // draw all the triangles
1159
1160         if (clmodel->aliastype == ALIASTYPE_MD2)
1161         {
1162                 if (currententity->skinnum < 0 || currententity->skinnum >= pheader->num_skins)
1163                 {
1164                         currententity->skinnum = 0;
1165                         Con_DPrintf("invalid skin number %d for model %s\n", currententity->skinnum, clmodel->name);
1166                 }
1167                 glBindTexture(GL_TEXTURE_2D, pheader->gl_texturenum[currententity->skinnum]);
1168         }
1169         else
1170         {
1171                 if (currententity->skinnum < 0 || currententity->skinnum >= paliashdr->numskins)
1172                 {
1173                         currententity->skinnum = 0;
1174                         Con_DPrintf("invalid skin number %d for model %s\n", currententity->skinnum, clmodel->name);
1175                 }
1176                 anim = (int)(cl.time*10) & 3;
1177             glBindTexture(GL_TEXTURE_2D, paliashdr->gl_texturenum[currententity->skinnum][anim]);
1178         }
1179         glDisable(GL_ALPHA_TEST);
1180         glEnable (GL_TEXTURE_2D);
1181
1182         // we can't dynamically colormap textures, so they are cached
1183         // seperately for the players.  Heads are just uncolored.
1184         if (currententity->colormap != vid.colormap/* && !gl_nocolors.value*/)
1185         {
1186                 i = currententity - cl_entities;
1187                 if (i >= 1 && i<=cl.maxclients /* && !strcmp (currententity->model->name, "progs/player.mdl") */)
1188                     glBindTexture(GL_TEXTURE_2D, playertextures - 1 + i);
1189         }
1190
1191 //      if (gl_affinemodels.value)
1192 //              glHint (GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
1193         if (clmodel->aliastype == ALIASTYPE_MD2)
1194                 R_DrawQ2AliasFrame (pheader);
1195         else
1196                 R_DrawAliasFrame (paliashdr);
1197
1198         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1199 }
1200
1201 //==================================================================================
1202
1203 void R_DrawBrushModel (entity_t *e);
1204
1205 /*
1206 =============
1207 R_DrawEntitiesOnList
1208 =============
1209 */
1210 // LordHavoc: split so bmodels are rendered before any other objects
1211 void R_DrawEntitiesOnList1 (void)
1212 {
1213         int             i;
1214
1215         if (!r_drawentities.value)
1216                 return;
1217
1218         for (i=0 ; i<cl_numvisedicts ; i++)
1219         {
1220                 if (cl_visedicts[i]->model->type != mod_brush)
1221                         continue;
1222                 currententity = cl_visedicts[i];
1223                 modelalpha = currententity->alpha;
1224
1225                 R_DrawBrushModel (currententity);
1226         }
1227 }
1228
1229 void R_DrawEntitiesOnList2 (void)
1230 {
1231         int             i;
1232
1233         if (!r_drawentities.value)
1234                 return;
1235
1236         for (i=0 ; i<cl_numvisedicts ; i++)
1237         {
1238                 currententity = cl_visedicts[i];
1239                 modelalpha = currententity->alpha;
1240
1241                 switch (currententity->model->type)
1242                 {
1243                 case mod_alias:
1244                         R_DrawAliasModel (currententity, true);
1245                         break;
1246
1247                 case mod_sprite:
1248                         R_DrawSpriteModel (currententity);
1249                         break;
1250
1251                 default:
1252                         break;
1253                 }
1254         }
1255 }
1256
1257 /*
1258 =============
1259 R_DrawViewModel
1260 =============
1261 */
1262 void R_DrawViewModel (void)
1263 {
1264         if (!r_drawviewmodel.value || chase_active.value || envmap || !r_drawentities.value || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.model)
1265                 return;
1266
1267         currententity = &cl.viewent;
1268         currententity->alpha = modelalpha = cl_entities[cl.viewentity].alpha; // LordHavoc: if the player is transparent, so is his gun
1269         currententity->effects = cl_entities[cl.viewentity].effects;
1270         currententity->scale = 1;
1271         VectorCopy(cl_entities[cl.viewentity].colormod, currententity->colormod);
1272
1273         // hack the depth range to prevent view model from poking into walls
1274         glDepthRange (gldepthmin, gldepthmin + 0.3*(gldepthmax-gldepthmin));
1275         R_DrawAliasModel (currententity, FALSE);
1276         glDepthRange (gldepthmin, gldepthmax);
1277 }
1278
1279 void R_DrawBrushModel (entity_t *e);
1280
1281 void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees );
1282
1283 void R_SetFrustum (void)
1284 {
1285         int             i;
1286
1287         if (r_refdef.fov_x == 90)
1288         {
1289                 // front side is visible
1290
1291                 VectorAdd (vpn, vright, frustum[0].normal);
1292                 VectorSubtract (vpn, vright, frustum[1].normal);
1293
1294                 VectorAdd (vpn, vup, frustum[2].normal);
1295                 VectorSubtract (vpn, vup, frustum[3].normal);
1296         }
1297         else
1298         {
1299                 // rotate VPN right by FOV_X/2 degrees
1300                 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
1301                 // rotate VPN left by FOV_X/2 degrees
1302                 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
1303                 // rotate VPN up by FOV_X/2 degrees
1304                 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
1305                 // rotate VPN down by FOV_X/2 degrees
1306                 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
1307         }
1308
1309         for (i=0 ; i<4 ; i++)
1310         {
1311                 frustum[i].type = PLANE_ANYZ;
1312                 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
1313 //              frustum[i].signbits = SignbitsForPlane (&frustum[i]);
1314                 BoxOnPlaneSideClassify(&frustum[i]);
1315         }
1316 }
1317
1318 void R_AnimateLight (void);
1319 void V_CalcBlend (void);
1320
1321 /*
1322 ===============
1323 R_SetupFrame
1324 ===============
1325 */
1326 void R_SetupFrame (void)
1327 {
1328 // don't allow cheats in multiplayer
1329         if (cl.maxclients > 1)
1330                 Cvar_Set ("r_fullbright", "0");
1331
1332         R_AnimateLight ();
1333
1334         r_framecount++;
1335
1336 // build the transformation matrix for the given view angles
1337         VectorCopy (r_refdef.vieworg, r_origin);
1338
1339         AngleVectors (r_refdef.viewangles, vpn, vright, vup);
1340
1341 // current viewleaf
1342         r_oldviewleaf = r_viewleaf;
1343         r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
1344
1345         V_SetContentsColor (r_viewleaf->contents);
1346         V_CalcBlend ();
1347
1348         r_cache_thrash = false;
1349
1350         c_brush_polys = 0;
1351         c_alias_polys = 0;
1352
1353 }
1354
1355
1356 void MYgluPerspective( GLdouble fovy, GLdouble aspect,
1357                      GLdouble zNear, GLdouble zFar )
1358 {
1359    GLdouble xmin, xmax, ymin, ymax;
1360
1361    ymax = zNear * tan( fovy * M_PI / 360.0 );
1362    ymin = -ymax;
1363
1364    xmin = ymin * aspect;
1365    xmax = ymax * aspect;
1366
1367    glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
1368 }
1369
1370
1371 extern char skyname[];
1372
1373 /*
1374 =============
1375 R_SetupGL
1376 =============
1377 */
1378 void R_SetupGL (void)
1379 {
1380         float   screenaspect;
1381         extern  int glwidth, glheight;
1382         int             x, x2, y2, y, w, h;
1383
1384         //
1385         // set up viewpoint
1386         //
1387         glMatrixMode(GL_PROJECTION);
1388     glLoadIdentity ();
1389         x = r_refdef.vrect.x * glwidth/vid.width;
1390         x2 = (r_refdef.vrect.x + r_refdef.vrect.width) * glwidth/vid.width;
1391         y = (vid.height-r_refdef.vrect.y) * glheight/vid.height;
1392         y2 = (vid.height - (r_refdef.vrect.y + r_refdef.vrect.height)) * glheight/vid.height;
1393
1394         // fudge around because of frac screen scale
1395         if (x > 0)
1396                 x--;
1397         if (x2 < glwidth)
1398                 x2++;
1399         if (y2 < 0)
1400                 y2--;
1401         if (y < glheight)
1402                 y++;
1403
1404         w = x2 - x;
1405         h = y - y2;
1406
1407         if (envmap)
1408         {
1409                 x = y2 = 0;
1410                 w = h = 256;
1411         }
1412
1413         glViewport (glx + x, gly + y2, w, h);
1414     screenaspect = (float)r_refdef.vrect.width/r_refdef.vrect.height;
1415 //      yfov = 2*atan((float)r_refdef.vrect.height/r_refdef.vrect.width)*180/M_PI;
1416 //      if (skyname[0]) // skybox enabled?
1417 //              MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  r_skyboxsize.value*1.732050807569 + 256); // this is size*sqrt(3) + 256
1418 //      else
1419                 MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  6144);
1420
1421         glCullFace(GL_FRONT);
1422
1423         glMatrixMode(GL_MODELVIEW);
1424     glLoadIdentity ();
1425
1426     glRotatef (-90,  1, 0, 0);      // put Z going up
1427     glRotatef (90,  0, 0, 1);       // put Z going up
1428     glRotatef (-r_refdef.viewangles[2],  1, 0, 0);
1429     glRotatef (-r_refdef.viewangles[0],  0, 1, 0);
1430     glRotatef (-r_refdef.viewangles[1],  0, 0, 1);
1431     glTranslatef (-r_refdef.vieworg[0],  -r_refdef.vieworg[1],  -r_refdef.vieworg[2]);
1432
1433         glGetFloatv (GL_MODELVIEW_MATRIX, r_world_matrix);
1434
1435         //
1436         // set drawing parms
1437         //
1438 //      if (gl_cull.value)
1439                 glEnable(GL_CULL_FACE);
1440 //      else
1441 //              glDisable(GL_CULL_FACE);
1442
1443         glEnable(GL_BLEND); // was Disable
1444         glDisable(GL_ALPHA_TEST);
1445         glAlphaFunc(GL_GREATER, 0.5);
1446         glEnable(GL_DEPTH_TEST);
1447         glDepthMask(1);
1448         glShadeModel(GL_SMOOTH);
1449 }
1450
1451 void R_DrawWorld (void);
1452 //void R_RenderDlights (void);
1453 void R_DrawParticles (void);
1454
1455 /*
1456 =============
1457 R_Clear
1458 =============
1459 */
1460 void R_Clear (void)
1461 {
1462 //      glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // LordHavoc: moved to SCR_UpdateScreen
1463         gldepthmin = 0;
1464         gldepthmax = 1;
1465         glDepthFunc (GL_LEQUAL);
1466
1467         glDepthRange (gldepthmin, gldepthmax);
1468 }
1469
1470 // LordHavoc: my trick to *FIX* GLQuake lighting once and for all :)
1471 void GL_Brighten()
1472 {
1473         glMatrixMode(GL_PROJECTION);
1474     glLoadIdentity ();
1475         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
1476         glMatrixMode(GL_MODELVIEW);
1477     glLoadIdentity ();
1478         glDisable (GL_DEPTH_TEST);
1479         glDisable (GL_CULL_FACE);
1480         glDisable(GL_TEXTURE_2D);
1481         glEnable(GL_BLEND);
1482         glBlendFunc (GL_DST_COLOR, GL_ONE);
1483         glBegin (GL_TRIANGLES);
1484         glColor3f (1, 1, 1);
1485         glVertex2f (-5000, -5000);
1486         glVertex2f (10000, -5000);
1487         glVertex2f (-5000, 10000);
1488         glEnd ();
1489         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1490         glDisable(GL_BLEND);
1491         glEnable(GL_TEXTURE_2D);
1492         glEnable (GL_DEPTH_TEST);
1493         glEnable (GL_CULL_FACE);
1494 }
1495
1496 extern cvar_t contrast;
1497 extern cvar_t brightness;
1498 extern cvar_t gl_lightmode;
1499
1500 void GL_BlendView()
1501 {
1502         glMatrixMode(GL_PROJECTION);
1503     glLoadIdentity ();
1504         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
1505         glMatrixMode(GL_MODELVIEW);
1506     glLoadIdentity ();
1507         glDisable (GL_DEPTH_TEST);
1508         glDisable (GL_CULL_FACE);
1509         glDisable(GL_TEXTURE_2D);
1510         glEnable(GL_BLEND);
1511         if (lighthalf)
1512         {
1513                 glBlendFunc (GL_DST_COLOR, GL_ONE);
1514                 glBegin (GL_TRIANGLES);
1515                 glColor3f (1, 1, 1);
1516                 glVertex2f (-5000, -5000);
1517                 glVertex2f (10000, -5000);
1518                 glVertex2f (-5000, 10000);
1519                 glEnd ();
1520         }
1521         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1522         contrast.value = bound(0.2, contrast.value, 1.0);
1523         if (/*gl_polyblend.value && */v_blend[3])
1524         {
1525                 glBegin (GL_TRIANGLES);
1526                 glColor4fv (v_blend);
1527                 glVertex2f (-5000, -5000);
1528                 glVertex2f (10000, -5000);
1529                 glVertex2f (-5000, 10000);
1530                 glEnd ();
1531         }
1532
1533         glEnable (GL_CULL_FACE);
1534         glEnable (GL_DEPTH_TEST);
1535         glDisable(GL_BLEND);
1536         glEnable(GL_TEXTURE_2D);
1537 }
1538
1539 #define TIMEREPORT(DESC) \
1540         if (r_speeds2.value)\
1541         {\
1542                 temptime = -currtime;\
1543                 currtime = Sys_FloatTime();\
1544                 temptime += currtime;\
1545                 Con_Printf(DESC " %.4fms ", temptime * 1000.0);\
1546         }
1547
1548 /*
1549 ================
1550 R_RenderView
1551
1552 r_refdef must be set before the first call
1553 ================
1554 */
1555 void R_RenderView (void)
1556 {
1557 //      double currtime, temptime;
1558 //      if (r_norefresh.value)
1559 //              return;
1560
1561         if (!r_worldentity.model || !cl.worldmodel)
1562                 Sys_Error ("R_RenderView: NULL worldmodel");
1563
1564         lighthalf = gl_lightmode.value;
1565
1566         FOG_framebegin();
1567         transpolyclear();
1568
1569 //      if (r_speeds2.value)
1570 //      {
1571 //              currtime = Sys_FloatTime();
1572 //              Con_Printf("render time: ");
1573 //      }
1574         R_Clear();
1575 //      TIMEREPORT("R_Clear")
1576
1577         // render normal view
1578
1579         R_SetupFrame ();
1580         R_SetFrustum ();
1581         R_SetupGL ();
1582         R_MarkLeaves ();        // done here so we know if we're in water
1583         R_DrawWorld ();         // adds static entities to the list
1584         S_ExtraUpdate ();       // don't let sound get messed up if going slow
1585         wallpolyclear();
1586         R_DrawEntitiesOnList1 (); // BSP models
1587         wallpolyrender();
1588         R_DrawEntitiesOnList2 (); // other models
1589 //      R_RenderDlights ();
1590         R_DrawViewModel ();
1591         R_DrawParticles ();
1592         transpolyrender();
1593
1594         FOG_frameend();
1595         GL_BlendView();
1596 //      if (r_speeds2.value)
1597 //              Con_Printf("\n");
1598 }