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_particles = {"r_particles", "1"};
  97 //cvar_t        r_dynamicwater = {"r_dynamicwater", "1"};
  98 //cvar_t        r_smokealpha = {"r_smokealpha", "0.25"};
  99 //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...
 100
 101 cvar_t  r_fogdensity = {"r_fogdensity", "0"};
 102 cvar_t  r_fogred = {"r_fogred","0.3"};
 103 cvar_t  r_foggreen = {"r_foggreen","0.3"};
 104 cvar_t  r_fogblue = {"r_fogblue","0.3"};
 105
 106 cvar_t  gl_fogenable = {"gl_fogenable", "0"};
 107 cvar_t  gl_fogdensity = {"gl_fogdensity", "0.25"};
 108 cvar_t  gl_fogred = {"gl_fogred","0.3"};
 109 cvar_t  gl_foggreen = {"gl_foggreen","0.3"};
 110 cvar_t  gl_fogblue = {"gl_fogblue","0.3"};
 111 cvar_t  gl_fogstart = {"gl_fogstart", "0"};
 112 cvar_t  gl_fogend = {"gl_fogend","0"};
 113
 114 int chrometexture;
 115
 116 void makechrometextures()
 117 {
 118         int x, y, g, g2, amplitude, noise[64][64], min, max;
 119         byte data[64][64][4];
 120         //
 121         // particle texture
 122         //
 123         chrometexture = texture_extension_number++;
 124     glBindTexture(GL_TEXTURE_2D, chrometexture);
 125
 126 #define n(x,y) noise[(y)&63][(x)&63]
 127
 128         amplitude = 16777215;
 129         g2 = 64;
 130         noise[0][0] = 0;
 131         for (;(g = g2 >> 1) >= 1;g2 >>= 1)
 132         {
 133                 // subdivide, diamond-square algorythm (really this has little to do with squares)
 134                 // diamond
 135                 for (y = 0;y < 64;y += g2)
 136                         for (x = 0;x < 64;x += g2)
 137                                 n(x+g,y+g) = (n(x,y) + n(x+g2,y) + n(x,y+g2) + n(x+g2,y+g2)) >> 2;
 138                 // square
 139                 for (y = 0;y < 64;y += g2)
 140                         for (x = 0;x < 64;x += g2)
 141                         {
 142                                 n(x+g,y) = (n(x,y) + n(x+g2,y) + n(x+g,y-g) + n(x+g,y+g)) >> 2;
 143                                 n(x,y+g) = (n(x,y) + n(x,y+g2) + n(x-g,y+g) + n(x+g,y+g)) >> 2;
 144                         }
 145                 // brownian motion theory
 146                 amplitude >>= 1;
 147                 for (y = 0;y < 64;y += g)
 148                         for (x = 0;x < 64;x += g)
 149                                 noise[y][x] += rand()&amplitude;
 150         }
 151         // normalize the noise range
 152         min = max = 0;
 153         for (y = 0;y < 64;y++)
 154                 for (x = 0;x < 64;x++)
 155                 {
 156                         if (n(x,y) < min) min = n(x,y);
 157                         if (n(x,y) > max) max = n(x,y);
 158                 }
 159         max -= min;
 160         for (y = 0;y < 64;y++)
 161                 for (x = 0;x < 64;x++)
 162                         n(x,y) = (n(x,y) - min) * 255 / max;
 163
 164 #undef n
 165
 166         // convert to RGBA data
 167         for (y = 0;y < 64;y++)
 168                 for (x = 0;x < 64;x++)
 169                 {
 170                         data[y][x][0] = data[y][x][1] = data[y][x][2] = (byte) noise[y][x];
 171                         data[y][x][3] = 255;
 172                 }
 173
 174         glTexImage2D (GL_TEXTURE_2D, 0, 4, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
 175
 176         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 177
 178         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 179         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 180 }
 181
 182 extern qboolean isRagePro;
 183
 184 qboolean lighthalf;
 185
 186 vec3_t fogcolor;
 187 vec_t fogdensity;
 188 qboolean fogenabled;
 189 qboolean oldgl_fogenable;
 190 void FOG_framebegin()
 191 {
 192         if (gl_fogenable.value)
 193         {
 194                 oldgl_fogenable = true;
 195                 r_fogdensity.value = gl_fogdensity.value;
 196                 r_fogred.value = gl_fogred.value;
 197                 r_foggreen.value = gl_foggreen.value;
 198                 r_fogblue.value = gl_fogblue.value;
 199         }
 200         else if (oldgl_fogenable)
 201         {
 202                 oldgl_fogenable = false;
 203                 r_fogdensity.value = 0;
 204                 r_fogred.value = 0.3;
 205                 r_foggreen.value = 0.3;
 206                 r_fogblue.value = 0.3;
 207         }
 208         /*
 209         if(gl_fogdensity.value)
 210         {
 211                 // LordHavoc: Borland C++ 5.0 was choking on this line, stupid compiler...
 212                 //GLfloat colors[4] = {(GLfloat) gl_fogred.value, (GLfloat) gl_foggreen.value, (GLfloat) gl_fogblue.value, (GLfloat) 1};
 213                 GLfloat colors[4];
 214                 colors[0] = gl_fogred.value;
 215                 colors[1] = gl_foggreen.value;
 216                 colors[2] = gl_fogblue.value;
 217                 colors[3] = 1;
 218
 219                 glFogi (GL_FOG_MODE, GL_EXP2);
 220                 glFogf (GL_FOG_DENSITY, (GLfloat) gl_fogdensity.value / 100);
 221                 glFogfv (GL_FOG_COLOR, colors);
 222                 glEnable (GL_FOG);
 223         }
 224         else
 225                 glDisable(GL_FOG);
 226         */
 227         if (r_fogdensity.value)
 228         {
 229                 fogenabled = true;
 230                 fogdensity = -6144.0f / (r_fogdensity.value * r_fogdensity.value);
 231                 fogcolor[0] = bound(0.0f, r_fogred.value, 1.0f);
 232                 fogcolor[1] = bound(0.0f, r_foggreen.value, 1.0f);
 233                 fogcolor[2] = bound(0.0f, r_fogblue.value, 1.0f);
 234                 if (lighthalf)
 235                 {
 236                         fogcolor[0] *= 0.5f;
 237                         fogcolor[1] *= 0.5f;
 238                         fogcolor[2] *= 0.5f;
 239                 }
 240         }
 241         else
 242                 fogenabled = false;
 243 }
 244
 245 void FOG_frameend()
 246 {
 247 //      glDisable(GL_FOG);
 248 }
 249
 250 void FOG_clear()
 251 {
 252         gl_fogenable.value = 0;
 253         r_fogdensity.value = 0;
 254         r_fogred.value = 0.3;
 255         r_fogblue.value = 0.3;
 256         r_foggreen.value = 0.3;
 257 }
 258
 259 void FOG_registercvars()
 260 {
 261         Cvar_RegisterVariable (&r_fogdensity);
 262         Cvar_RegisterVariable (&r_fogred);
 263         Cvar_RegisterVariable (&r_foggreen);
 264         Cvar_RegisterVariable (&r_fogblue);
 265         Cvar_RegisterVariable (&gl_fogenable);
 266         Cvar_RegisterVariable (&gl_fogdensity);
 267         Cvar_RegisterVariable (&gl_fogred);
 268         Cvar_RegisterVariable (&gl_foggreen);
 269         Cvar_RegisterVariable (&gl_fogblue);
 270         Cvar_RegisterVariable (&gl_fogstart);
 271         Cvar_RegisterVariable (&gl_fogend);
 272 }
 273
 274 void glpoly_init();
 275 void glrsurf_init();
 276 void rlight_init();
 277
 278 // LordHavoc: vertex array
 279 float *aliasvert;
 280 float *aliasvertnorm;
 281 byte *aliasvertcolor;
 282
 283 void rmain_registercvars()
 284 {
 285         // allocate vertex processing arrays
 286         aliasvert = malloc(sizeof(float[MD2MAX_VERTS][3]));
 287         aliasvertnorm = malloc(sizeof(float[MD2MAX_VERTS][3]));
 288         aliasvertcolor = malloc(sizeof(byte[MD2MAX_VERTS][4]));
 289
 290         FOG_registercvars();
 291         Cvar_RegisterVariable (&r_speeds2);
 292         Cvar_RegisterVariable (&contrast);
 293         Cvar_RegisterVariable (&brightness);
 294         Cvar_RegisterVariable (&gl_lightmode);
 295 //      Cvar_RegisterVariable (&r_dynamicwater);
 296 //      Cvar_RegisterVariable (&r_particles);
 297 //      Cvar_RegisterVariable (&r_smokealpha);
 298 //      Cvar_RegisterVariable (&r_dynamicbothsides);
 299         Cvar_RegisterVariable (&r_fullbrights);
 300         if (nehahra)
 301                 Cvar_SetValue("r_fullbrights", 0);
 302 //      if (gl_vendor && strstr(gl_vendor, "3Dfx"))
 303 //              gl_lightmode.value = 0;
 304         Cvar_RegisterVariable (&r_fullbright);
 305         makechrometextures();
 306         glpoly_init();
 307         glrsurf_init();
 308         rlight_init();
 309 }
 310
 311 /*
 312 void R_RotateForEntity (entity_t *e)
 313 {
 314         glTranslatef (e->origin[0],  e->origin[1],  e->origin[2]);
 315
 316         glRotatef (e->angles[1],  0, 0, 1);
 317         glRotatef (-e->angles[0],  0, 1, 0);
 318         glRotatef (e->angles[2],  1, 0, 0);
 319
 320         glScalef (e->scale, e->scale, e->scale); // LordHavoc: model scale
 321 }
 322 */
 323
 324 // LordHavoc: if not for the fact BRIGHTFIELD particles require this, it would be removed...
 325 #define NUMVERTEXNORMALS        162
 326
 327 float   r_avertexnormals[NUMVERTEXNORMALS][3] = {
 328 #include "anorms.h"
 329 };
 330
 331 // LordHavoc: moved this shading stuff up because the sprites need shading stuff
 332 vec3_t  shadevector;
 333 vec3_t  shadecolor;
 334
 335 float   modelalpha;
 336
 337 void R_LightPoint (vec3_t color, vec3_t p);
 338 void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
 339 void R_DynamicLightPointNoMask(vec3_t color, vec3_t org);
 340
 341 float R_CalcAnimLerp(int pose, float lerpscale)
 342 {
 343         if (currententity->draw_lastmodel == currententity->model && currententity->draw_lerpstart <= cl.time)
 344         {
 345                 if (pose != currententity->draw_pose)
 346                 {
 347                         currententity->draw_lastpose = currententity->draw_pose;
 348                         currententity->draw_pose = pose;
 349                         currententity->draw_lerpstart = cl.time;
 350                         return 0;
 351                 }
 352                 else
 353                         return ((cl.time - currententity->draw_lerpstart) * lerpscale);
 354         }
 355         else // uninitialized
 356         {
 357                 currententity->draw_lastmodel = currententity->model;
 358                 currententity->draw_lastpose = currententity->draw_pose = pose;
 359                 currententity->draw_lerpstart = cl.time;
 360                 return 0;
 361         }
 362 }
 363
 364 /*
 365 =============================================================
 366
 367   SPRITE MODELS
 368
 369 =============================================================
 370 */
 371
 372 /*
 373 ================
 374 R_GetSpriteFrame
 375 ================
 376 */
 377 void R_GetSpriteFrame (entity_t *currententity, mspriteframe_t **oldframe, mspriteframe_t **newframe, float *framelerp)
 378 {
 379         msprite_t               *psprite;
 380         mspritegroup_t  *pspritegroup;
 381         int                             i, j, numframes, frame;
 382         float                   *pintervals, fullinterval, targettime, time, jtime, jinterval;
 383
 384         psprite = currententity->model->cache.data;
 385         frame = currententity->frame;
 386
 387         if ((frame >= psprite->numframes) || (frame < 0))
 388         {
 389                 Con_Printf ("R_DrawSprite: no such frame %d\n", frame);
 390                 frame = 0;
 391         }
 392
 393         if (psprite->frames[frame].type == SPR_SINGLE)
 394         {
 395                 if (currententity->draw_lastmodel == currententity->model && currententity->draw_lerpstart < cl.time)
 396                 {
 397                         if (frame != currententity->draw_pose)
 398                         {
 399                                 currententity->draw_lastpose = currententity->draw_pose;
 400                                 currententity->draw_pose = frame;
 401                                 currententity->draw_lerpstart = cl.time;
 402                                 *framelerp = 0;
 403                         }
 404                         else
 405                                 *framelerp = (cl.time - currententity->draw_lerpstart) * 10.0;
 406                 }
 407                 else // uninitialized
 408                 {
 409                         currententity->draw_lastmodel = currententity->model;
 410                         currententity->draw_lastpose = currententity->draw_pose = frame;
 411                         currententity->draw_lerpstart = cl.time;
 412                         *framelerp = 0;
 413                 }
 414                 *oldframe = psprite->frames[currententity->draw_lastpose].frameptr;
 415                 *newframe = psprite->frames[frame].frameptr;
 416         }
 417         else
 418         {
 419                 pspritegroup = (mspritegroup_t *)psprite->frames[frame].frameptr;
 420                 pintervals = pspritegroup->intervals;
 421                 numframes = pspritegroup->numframes;
 422                 fullinterval = pintervals[numframes-1];
 423
 424                 time = cl.time + currententity->syncbase;
 425
 426         // when loading in Mod_LoadSpriteGroup, we guaranteed all interval values
 427         // are positive, so we don't have to worry about division by 0
 428                 targettime = time - ((int)(time / fullinterval)) * fullinterval;
 429
 430                 // LordHavoc: since I can't measure the time properly when it loops from numframes-1 to 0,
 431                 //            I instead measure the time of the first frame, hoping it is consistent
 432                 j = numframes-1;jtime = 0;jinterval = pintervals[1] - pintervals[0];
 433                 for (i=0 ; i<(numframes-1) ; i++)
 434                 {
 435                         if (pintervals[i] > targettime)
 436                                 break;
 437                         j = i;jinterval = pintervals[i] - jtime;jtime = pintervals[i];
 438                 }
 439                 *framelerp = (targettime - jtime) / jinterval;
 440
 441                 *oldframe = pspritegroup->frames[j];
 442                 *newframe = pspritegroup->frames[i];
 443         }
 444 }
 445
 446 void GL_DrawSpriteImage (mspriteframe_t *frame, vec3_t origin, vec3_t up, vec3_t right, int red, int green, int blue, int alpha)
 447 {
 448         // LordHavoc: rewrote this to use the transparent poly system
 449         transpolybegin(frame->gl_texturenum, 0, frame->gl_fogtexturenum, currententity->effects & EF_ADDITIVE ? TPOLYTYPE_ADD : TPOLYTYPE_ALPHA);
 450         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);
 451         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);
 452         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);
 453         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);
 454         transpolyend();
 455 }
 456
 457 extern qboolean isG200, isRagePro, lighthalf;
 458
 459 /*
 460 =================
 461 R_DrawSpriteModel
 462
 463 =================
 464 */
 465 void R_DrawSpriteModel (entity_t *e)
 466 {
 467         mspriteframe_t  *oldframe, *newframe;
 468         float           *up, *right, lerp, ilerp;
 469         vec3_t          v_forward, v_right, v_up, org;
 470         msprite_t               *psprite;
 471
 472         // don't even bother culling, because it's just a single
 473         // polygon without a surface cache
 474         R_GetSpriteFrame (e, &oldframe, &newframe, &lerp);
 475         if (lerp < 0) lerp = 0;
 476         if (lerp > 1) lerp = 1;
 477         if (isRagePro) // LordHavoc: no alpha scaling supported on per pixel alpha images on ATI Rage Pro... ACK!
 478                 lerp = 1;
 479         ilerp = 1.0 - lerp;
 480         psprite = e->model->cache.data;
 481
 482         if (psprite->type == SPR_ORIENTED)
 483         {       // bullet marks on walls
 484                 AngleVectors (e->angles, v_forward, v_right, v_up);
 485                 up = v_up;
 486                 right = v_right;
 487                 VectorSubtract(e->origin, vpn, org);
 488         }
 489         else
 490         {       // normal sprite
 491                 up = vup;
 492                 right = vright;
 493                 VectorCopy(e->origin, org);
 494         }
 495         if (e->scale != 1)
 496         {
 497                 VectorScale(up, e->scale, up);
 498                 VectorScale(right, e->scale, right);
 499         }
 500
 501         if (e->model->flags & EF_FULLBRIGHT || e->effects & EF_FULLBRIGHT)
 502         {
 503                 if (lighthalf)
 504                 {
 505                         shadecolor[0] = e->colormod[0] * 128;
 506                         shadecolor[1] = e->colormod[1] * 128;
 507                         shadecolor[2] = e->colormod[2] * 128;
 508                 }
 509                 else
 510                 {
 511                         shadecolor[0] = e->colormod[0] * 255;
 512                         shadecolor[1] = e->colormod[1] * 255;
 513                         shadecolor[2] = e->colormod[2] * 255;
 514                 }
 515         }
 516         else
 517         {
 518                 R_LightPoint (shadecolor, e->origin);
 519                 R_DynamicLightPointNoMask(shadecolor, e->origin);
 520                 if (lighthalf)
 521                 {
 522                         shadecolor[0] *= e->colormod[0] * 0.5;
 523                         shadecolor[1] *= e->colormod[1] * 0.5;
 524                         shadecolor[2] *= e->colormod[2] * 0.5;
 525                 }
 526         }
 527
 528         // LordHavoc: interpolated sprite rendering
 529         if (ilerp != 0)
 530                 GL_DrawSpriteImage(oldframe, org, up, right, shadecolor[0],shadecolor[1],shadecolor[2],e->alpha*255*ilerp);
 531         if (lerp != 0)
 532                 GL_DrawSpriteImage(newframe, org, up, right, shadecolor[0],shadecolor[1],shadecolor[2],e->alpha*255*lerp);
 533 }
 534
 535 /*
 536 =============================================================
 537
 538   ALIAS MODELS
 539
 540 =============================================================
 541 */
 542
 543 extern vec3_t softwaretransform_x;
 544 extern vec3_t softwaretransform_y;
 545 extern vec3_t softwaretransform_z;
 546 extern vec_t softwaretransform_scale;
 547 extern vec3_t softwaretransform_offset;
 548 void R_AliasLerpVerts(int vertcount, float lerp, trivert2 *verts1, vec3_t scale1, vec3_t translate1, trivert2 *verts2, vec3_t scale2, vec3_t translate2)
 549 {
 550         int i;
 551         vec3_t point, matrix_x, matrix_y, matrix_z;
 552         float *av, *avn;
 553         av = aliasvert;
 554         avn = aliasvertnorm;
 555         if (lerp < 0) lerp = 0;
 556         if (lerp > 1) lerp = 1;
 557         if (lerp != 0)
 558         {
 559                 float ilerp, ilerp127, lerp127, scalex1, scalex2, translatex, scaley1, scaley2, translatey, scalez1, scalez2, translatez;
 560                 if (lerp < 0) lerp = 0;
 561                 if (lerp > 1) lerp = 1;
 562                 ilerp = 1 - lerp;
 563                 ilerp127 = ilerp * (1.0 / 127.0);
 564                 lerp127 = lerp * (1.0 / 127.0);
 565                 VectorScale(softwaretransform_x, softwaretransform_scale, matrix_x);
 566                 VectorScale(softwaretransform_y, softwaretransform_scale, matrix_y);
 567                 VectorScale(softwaretransform_z, softwaretransform_scale, matrix_z);
 568                 // calculate combined interpolation variables
 569                 scalex1 = scale1[0] * ilerp;scalex2 = scale2[0] *  lerp;translatex = translate1[0] * ilerp + translate2[0] *  lerp;
 570                 scaley1 = scale1[1] * ilerp;scaley2 = scale2[1] *  lerp;translatey = translate1[1] * ilerp + translate2[1] *  lerp;
 571                 scalez1 = scale1[2] * ilerp;scalez2 = scale2[2] *  lerp;translatez = translate1[2] * ilerp + translate2[2] *  lerp;
 572                 // generate vertices
 573                 for (i = 0;i < vertcount;i++)
 574                 {
 575                         // rotate, scale, and translate the vertex locations
 576                         point[0] = verts1->v[0] * scalex1 + verts2->v[0] * scalex2 + translatex;
 577                         point[1] = verts1->v[1] * scaley1 + verts2->v[1] * scaley2 + translatey;
 578                         point[2] = verts1->v[2] * scalez1 + verts2->v[2] * scalez2 + translatez;
 579                         *av++ = point[0] * matrix_x[0] + point[1] * matrix_y[0] + point[2] * matrix_z[0] + softwaretransform_offset[0];
 580                         *av++ = point[0] * matrix_x[1] + point[1] * matrix_y[1] + point[2] * matrix_z[1] + softwaretransform_offset[1];
 581                         *av++ = point[0] * matrix_x[2] + point[1] * matrix_y[2] + point[2] * matrix_z[2] + softwaretransform_offset[2];
 582                         // rotate the normals
 583                         point[0] = verts1->n[0] * ilerp127 + verts2->n[0] * lerp127;
 584                         point[1] = verts1->n[1] * ilerp127 + verts2->n[1] * lerp127;
 585                         point[2] = verts1->n[2] * ilerp127 + verts2->n[2] * lerp127;
 586                         *avn++ = point[0] * softwaretransform_x[0] + point[1] * softwaretransform_y[0] + point[2] * softwaretransform_z[0];
 587                         *avn++ = point[0] * softwaretransform_x[1] + point[1] * softwaretransform_y[1] + point[2] * softwaretransform_z[1];
 588                         *avn++ = point[0] * softwaretransform_x[2] + point[1] * softwaretransform_y[2] + point[2] * softwaretransform_z[2];
 589                         verts1++;verts2++;
 590                 }
 591         }
 592         else
 593         {
 594                 float i127;
 595                 i127 = 1.0f / 127.0f;
 596                 VectorScale(softwaretransform_x, softwaretransform_scale, matrix_x);
 597                 VectorScale(softwaretransform_y, softwaretransform_scale, matrix_y);
 598                 VectorScale(softwaretransform_z, softwaretransform_scale, matrix_z);
 599                 // generate vertices
 600                 for (i = 0;i < vertcount;i++)
 601                 {
 602                         // rotate, scale, and translate the vertex locations
 603                         point[0] = verts1->v[0] * scale1[0] + translate1[0];
 604                         point[1] = verts1->v[1] * scale1[1] + translate1[1];
 605                         point[2] = verts1->v[2] * scale1[2] + translate1[2];
 606                         *av++ = point[0] * matrix_x[0] + point[1] * matrix_y[0] + point[2] * matrix_z[0] + softwaretransform_offset[0];
 607                         *av++ = point[0] * matrix_x[1] + point[1] * matrix_y[1] + point[2] * matrix_z[1] + softwaretransform_offset[1];
 608                         *av++ = point[0] * matrix_x[2] + point[1] * matrix_y[2] + point[2] * matrix_z[2] + softwaretransform_offset[2];
 609                         // rotate the normals
 610                         point[0] = verts1->n[0] * i127;
 611                         point[1] = verts1->n[1] * i127;
 612                         point[2] = verts1->n[2] * i127;
 613                         *avn++ = point[0] * softwaretransform_x[0] + point[1] * softwaretransform_y[0] + point[2] * softwaretransform_z[0];
 614                         *avn++ = point[0] * softwaretransform_x[1] + point[1] * softwaretransform_y[1] + point[2] * softwaretransform_z[1];
 615                         *avn++ = point[0] * softwaretransform_x[2] + point[1] * softwaretransform_y[2] + point[2] * softwaretransform_z[2];
 616                         verts1++;
 617                 }
 618         }
 619 }
 620
 621 /*
 622 =================
 623 R_DrawAliasFrame
 624
 625 =================
 626 */
 627 extern vec3_t lightspot;
 628 void R_LightModel(int numverts, vec3_t center);
 629 extern cvar_t gl_vertexarrays;
 630 void R_DrawAliasFrame (aliashdr_t *paliashdr)
 631 {
 632         int                             i, pose, frame = currententity->frame;
 633         float                   lerpscale, lerp;
 634
 635         softwaretransformforentity(currententity);
 636
 637         if ((frame >= paliashdr->numframes) || (frame < 0))
 638         {
 639                 Con_DPrintf ("R_AliasSetupFrame: no such frame %d\n", frame);
 640                 frame = 0;
 641         }
 642
 643         pose = paliashdr->frames[frame].firstpose;
 644
 645         if (paliashdr->frames[frame].numposes > 1)
 646         {
 647                 lerpscale = 1.0 / paliashdr->frames[frame].interval;
 648                 pose += (int)(cl.time * lerpscale) % paliashdr->frames[frame].numposes;
 649         }
 650         else
 651                 lerpscale = 10.0;
 652
 653         lerp = R_CalcAnimLerp(pose, lerpscale);
 654
 655         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);
 656
 657         R_LightModel(paliashdr->numverts, currententity->origin);
 658
 659         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 660         glShadeModel(GL_SMOOTH);
 661         if (currententity->effects & EF_ADDITIVE)
 662         {
 663                 glBlendFunc(GL_SRC_ALPHA, GL_ONE); // additive rendering
 664                 glEnable(GL_BLEND);
 665                 glDepthMask(0);
 666         }
 667         else if (modelalpha != 1.0)
 668         {
 669                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 670                 glEnable(GL_BLEND);
 671                 glDepthMask(0);
 672         }
 673         else
 674         {
 675                 glDisable(GL_BLEND);
 676                 glDepthMask(1);
 677         }
 678
 679         if (gl_vertexarrays.value)
 680         {
 681                 // LordHavoc: I would use InterleavedArrays here,
 682                 // but the texture coordinates are a seperate array,
 683                 // and it would be wasteful to copy them into the main array...
 684         //      glColor4f(shadecolor[0], shadecolor[1], shadecolor[2], modelalpha);
 685                 qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 686                 qglColorPointer(4, GL_UNSIGNED_BYTE, 0, aliasvertcolor);
 687                 glEnableClientState(GL_VERTEX_ARRAY);
 688                 glEnableClientState(GL_COLOR_ARRAY);
 689
 690                 // draw the front faces
 691                 qglTexCoordPointer(2, GL_FLOAT, 0, (void *)((int) paliashdr->texcoords + (int) paliashdr));
 692                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 693                 qglDrawElements(GL_TRIANGLES, paliashdr->frontfaces * 3, GL_UNSIGNED_SHORT, (void *)((int) paliashdr->vertindices + (int) paliashdr));
 694                 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 695
 696                 // draw the back faces
 697                 qglTexCoordPointer(2, GL_FLOAT, 0, (void *)((int) paliashdr->texcoords + sizeof(float[2]) * paliashdr->numverts + (int) paliashdr));
 698                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 699                 qglDrawElements(GL_TRIANGLES, paliashdr->backfaces * 3, GL_UNSIGNED_SHORT, (void *)((int) paliashdr->vertindices + sizeof(unsigned short[3]) * paliashdr->frontfaces + (int) paliashdr));
 700                 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 701
 702                 glDisableClientState(GL_COLOR_ARRAY);
 703                 glDisableClientState(GL_VERTEX_ARRAY);
 704         }
 705         else
 706         {
 707                 unsigned short *in, index;
 708                 float *tex;
 709                 in = (void *)((int) paliashdr->vertindices + (int) paliashdr);
 710                 glBegin(GL_TRIANGLES);
 711                 // draw the front faces
 712                 tex = (void *)((int) paliashdr->texcoords + (int) paliashdr);
 713                 //if (isG200)
 714                 //{
 715                         for (i = 0;i < paliashdr->frontfaces * 3;i++)
 716                         {
 717                                 index = *in++;
 718                                 glTexCoord2f(tex[index*2], tex[index*2+1]);
 719                                 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));
 720                                 glVertex3fv(&aliasvert[index*3]);
 721                         }
 722                 /*
 723                 }
 724                 else
 725                 {
 726                         for (i = 0;i < paliashdr->frontfaces * 3;i++)
 727                         {
 728                                 index = *in++;
 729                                 glTexCoord2f(tex[index*2], tex[index*2+1]);
 730                                 glColor4ub(aliasvertcolor[index*4], aliasvertcolor[index*4+1], aliasvertcolor[index*4+2], aliasvertcolor[index*4+3]);
 731                                 glVertex3fv(&aliasvert[index*3]);
 732                         }
 733                 }
 734                 */
 735                 // draw the back faces
 736                 tex += 2 * paliashdr->numverts;
 737                 //if (isG200)
 738                 //{
 739                         for (i = 0;i < paliashdr->backfaces * 3;i++)
 740                         {
 741                                 index = *in++;
 742                                 glTexCoord2f(tex[index*2], tex[index*2+1]);
 743                                 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));
 744                                 glVertex3fv(&aliasvert[index*3]);
 745                         }
 746                 /*
 747                 }
 748                 else
 749                 {
 750                         for (i = 0;i < paliashdr->backfaces * 3;i++)
 751                         {
 752                                 index = *in++;
 753                                 glTexCoord2f(tex[index*2], tex[index*2+1]);
 754                                 glColor4ub(aliasvertcolor[index*4], aliasvertcolor[index*4+1], aliasvertcolor[index*4+2], aliasvertcolor[index*4+3]);
 755                                 glVertex3fv(&aliasvert[index*3]);
 756                         }
 757                 }
 758                 */
 759                 glEnd();
 760         }
 761
 762         if (fogenabled)
 763         {
 764                 vec3_t diff;
 765                 glDisable (GL_TEXTURE_2D);
 766                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 767                 glEnable (GL_BLEND);
 768                 glDepthMask(0); // disable zbuffer updates
 769
 770                 VectorSubtract(currententity->origin, r_refdef.vieworg, diff);
 771                 glColor4f(fogcolor[0], fogcolor[1], fogcolor[2], exp(fogdensity/DotProduct(diff,diff)));
 772
 773                 if (gl_vertexarrays.value)
 774                 {
 775                         qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 776                         glEnableClientState(GL_VERTEX_ARRAY);
 777                         qglDrawElements(GL_TRIANGLES, paliashdr->numtris * 3, GL_UNSIGNED_SHORT, (void *)((int) paliashdr->vertindices + (int) paliashdr));
 778                         glDisableClientState(GL_VERTEX_ARRAY);
 779                 }
 780                 else
 781                 {
 782                         unsigned short *in;
 783                         in = (void *)((int) paliashdr->vertindices + (int) paliashdr);
 784                         glBegin(GL_TRIANGLES);
 785                         for (i = 0;i < paliashdr->numtris * 3;i++)
 786                                 glVertex3fv(&aliasvert[*in++ * 3]);
 787                         glEnd();
 788                 }
 789
 790                 glEnable (GL_TEXTURE_2D);
 791                 glColor3f (1,1,1);
 792         }
 793
 794         /*
 795         if (r_shadows.value && !(currententity->effects & EF_ADDITIVE) && currententity != &cl.viewent)
 796         {
 797                 // flatten it to make a shadow
 798                 float *av = aliasvert + 2, l = lightspot[2] + 0.125;
 799                 av = aliasvert + 2;
 800                 for (i = 0;i < paliashdr->numverts;i++, av+=3)
 801                         if (*av > l)
 802                                 *av = l;
 803                 glDisable (GL_TEXTURE_2D);
 804                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 805                 glEnable (GL_BLEND);
 806                 glDepthMask(0); // disable zbuffer updates
 807                 glColor4f (0,0,0,0.5 * modelalpha);
 808
 809                 if (gl_vertexarrays.value)
 810                 {
 811                         qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 812                         glEnableClientState(GL_VERTEX_ARRAY);
 813                         qglDrawElements(GL_TRIANGLES, paliashdr->numtris * 3, GL_UNSIGNED_SHORT, (void *)((int) paliashdr->vertindices + (int) paliashdr));
 814                         glDisableClientState(GL_VERTEX_ARRAY);
 815                 }
 816                 else
 817                 {
 818                         unsigned short *in;
 819                         in = (void *)((int) paliashdr->vertindices + (int) paliashdr);
 820                         glBegin(GL_TRIANGLES);
 821                         for (i = 0;i < paliashdr->numtris * 3;i++)
 822                                 glVertex3fv(&aliasvert[*in++ * 3]);
 823                         glEnd();
 824                 }
 825
 826                 glEnable (GL_TEXTURE_2D);
 827                 glColor3f (1,1,1);
 828         }
 829         */
 830
 831         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 832         glEnable (GL_BLEND);
 833         glDepthMask(1);
 834 }
 835
 836 /*
 837 =================
 838 R_DrawQ2AliasFrame
 839
 840 =================
 841 */
 842 void R_DrawQ2AliasFrame (md2mem_t *pheader)
 843 {
 844         int *order, count, frame = currententity->frame;
 845         float lerp;
 846         md2memframe_t *frame1, *frame2;
 847
 848         softwaretransformforentity(currententity);
 849
 850         if ((frame >= pheader->num_frames) || (frame < 0))
 851         {
 852                 Con_DPrintf ("R_SetupQ2AliasFrame: no such frame %d\n", frame);
 853                 frame = 0;
 854         }
 855
 856         lerp = R_CalcAnimLerp(frame, 10);
 857
 858         frame1 = (void *)((int) pheader + pheader->ofs_frames + (pheader->framesize * currententity->draw_lastpose));
 859         frame2 = (void *)((int) pheader + pheader->ofs_frames + (pheader->framesize * currententity->draw_pose));
 860         R_AliasLerpVerts(pheader->num_xyz, lerp, frame1->verts, frame1->scale, frame1->translate, frame2->verts, frame2->scale, frame2->translate);
 861
 862         R_LightModel(pheader->num_xyz, currententity->origin);
 863
 864         if (gl_vertexarrays.value)
 865         {
 866                 // LordHavoc: big mess...
 867                 // using arrays only slightly, although it is enough to prevent duplicates
 868                 // (saving half the transforms)
 869                 //glColor4f(shadecolor[0], shadecolor[1], shadecolor[2], modelalpha);
 870                 qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 871                 qglColorPointer(4, GL_UNSIGNED_BYTE, 0, aliasvertcolor);
 872                 glEnableClientState(GL_VERTEX_ARRAY);
 873                 glEnableClientState(GL_COLOR_ARRAY);
 874
 875                 order = (int *)((int)pheader + pheader->ofs_glcmds);
 876                 while(1)
 877                 {
 878                         if (!(count = *order++))
 879                                 break;
 880                         if (count > 0)
 881                                 glBegin(GL_TRIANGLE_STRIP);
 882                         else
 883                         {
 884                                 glBegin(GL_TRIANGLE_FAN);
 885                                 count = -count;
 886                         }
 887                         do
 888                         {
 889                                 glTexCoord2f(((float *)order)[0], ((float *)order)[1]);
 890                                 qglArrayElement(order[2]);
 891                                 order += 3;
 892                         }
 893                         while (count--);
 894                 }
 895
 896                 glDisableClientState(GL_COLOR_ARRAY);
 897                 glDisableClientState(GL_VERTEX_ARRAY);
 898         }
 899         else
 900         {
 901                 order = (int *)((int)pheader + pheader->ofs_glcmds);
 902                 while(1)
 903                 {
 904                         if (!(count = *order++))
 905                                 break;
 906                         if (count > 0)
 907                                 glBegin(GL_TRIANGLE_STRIP);
 908                         else
 909                         {
 910                                 glBegin(GL_TRIANGLE_FAN);
 911                                 count = -count;
 912                         }
 913                         //if (isG200)
 914                         //{
 915                                 do
 916                                 {
 917                                         glTexCoord2f(((float *)order)[0], ((float *)order)[1]);
 918                                         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));
 919                                         glVertex3fv(&aliasvert[order[2] * 3]);
 920                                         order += 3;
 921                                 }
 922                                 while (count--);
 923                         /*
 924                         }
 925                         else
 926                         {
 927                                 do
 928                                 {
 929                                         glTexCoord2f(((float *)order)[0], ((float *)order)[1]);
 930                                         glColor4ub(aliasvertcolor[order[2] * 4], aliasvertcolor[order[2] * 4 + 1], aliasvertcolor[order[2] * 4 + 2], aliasvertcolor[order[2] * 4 + 3]);
 931                                         glVertex3fv(&aliasvert[order[2] * 3]);
 932                                         order += 3;
 933                                 }
 934                                 while (count--);
 935                         }
 936                         */
 937                 }
 938         }
 939
 940         if (fogenabled)
 941         {
 942                 glDisable (GL_TEXTURE_2D);
 943                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 944                 glEnable (GL_BLEND);
 945                 glDepthMask(0); // disable zbuffer updates
 946                 {
 947                         vec3_t diff;
 948                         VectorSubtract(currententity->origin, r_refdef.vieworg, diff);
 949                         glColor4f(fogcolor[0], fogcolor[1], fogcolor[2], exp(fogdensity/DotProduct(diff,diff)));
 950                 }
 951
 952                 if (gl_vertexarrays.value)
 953                 {
 954                         // LordHavoc: big mess...
 955                         // using arrays only slightly, although it is enough to prevent duplicates
 956                         // (saving half the transforms)
 957                         //glColor4f(shadecolor[0], shadecolor[1], shadecolor[2], modelalpha);
 958                         qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
 959                         glEnableClientState(GL_VERTEX_ARRAY);
 960
 961                         order = (int *)((int)pheader + pheader->ofs_glcmds);
 962                         while(1)
 963                         {
 964                                 if (!(count = *order++))
 965                                         break;
 966                                 if (count > 0)
 967                                         glBegin(GL_TRIANGLE_STRIP);
 968                                 else
 969                                 {
 970                                         glBegin(GL_TRIANGLE_FAN);
 971                                         count = -count;
 972                                 }
 973                                 do
 974                                 {
 975                                         qglArrayElement(order[2]);
 976                                         order += 3;
 977                                 }
 978                                 while (count--);
 979                         }
 980
 981                         glDisableClientState(GL_VERTEX_ARRAY);
 982                 }
 983                 else
 984                 {
 985                         order = (int *)((int)pheader + pheader->ofs_glcmds);
 986                         while(1)
 987                         {
 988                                 if (!(count = *order++))
 989                                         break;
 990                                 if (count > 0)
 991                                         glBegin(GL_TRIANGLE_STRIP);
 992                                 else
 993                                 {
 994                                         glBegin(GL_TRIANGLE_FAN);
 995                                         count = -count;
 996                                 }
 997                                 do
 998                                 {
 999                                         glVertex3fv(&aliasvert[order[2] * 3]);
1000                                         order += 3;
1001                                 }
1002                                 while (count--);
1003                         }
1004                 }
1005
1006                 glEnable (GL_TEXTURE_2D);
1007                 glColor3f (1,1,1);
1008         }
1009
1010         /*
1011         if (r_shadows.value && !(currententity->effects & EF_ADDITIVE) && currententity != &cl.viewent)
1012         {
1013                 int i;
1014                 float *av = aliasvert + 2, l = lightspot[2] + 0.125;
1015                 av = aliasvert + 2;
1016                 for (i = 0;i < pheader->num_xyz;i++, av+=3)
1017                         if (*av > l)
1018                                 *av = l;
1019                 glDisable (GL_TEXTURE_2D);
1020                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1021                 glEnable (GL_BLEND);
1022                 glDepthMask(0); // disable zbuffer updates
1023                 glColor4f (0,0,0,0.5 * modelalpha);
1024
1025                 if (gl_vertexarrays.value)
1026                 {
1027                         qglVertexPointer(3, GL_FLOAT, 0, aliasvert);
1028                         glEnableClientState(GL_VERTEX_ARRAY);
1029
1030                         while(1)
1031                         {
1032                                 if (!(count = *order++))
1033                                         break;
1034                                 if (count > 0)
1035                                         glBegin(GL_TRIANGLE_STRIP);
1036                                 else
1037                                 {
1038                                         glBegin(GL_TRIANGLE_FAN);
1039                                         count = -count;
1040                                 }
1041                                 do
1042                                 {
1043                                         qglArrayElement(order[2]);
1044                                         order += 3;
1045                                 }
1046                                 while (count--);
1047                         }
1048
1049                         glDisableClientState(GL_VERTEX_ARRAY);
1050                 }
1051                 else
1052                 {
1053                         while(1)
1054                         {
1055                                 if (!(count = *order++))
1056                                         break;
1057                                 if (count > 0)
1058                                         glBegin(GL_TRIANGLE_STRIP);
1059                                 else
1060                                 {
1061                                         glBegin(GL_TRIANGLE_FAN);
1062                                         count = -count;
1063                                 }
1064                                 do
1065                                 {
1066                                         glVertex3fv(&aliasvert[order[2] * 3]);
1067                                         order += 3;
1068                                 }
1069                                 while (count--);
1070                         }
1071                 }
1072
1073                 glEnable (GL_TEXTURE_2D);
1074                 glColor3f (1,1,1);
1075         }
1076         */
1077
1078         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1079         glEnable (GL_BLEND);
1080         glDepthMask(1);
1081 }
1082
1083 /*
1084 =================
1085 R_DrawAliasModel
1086
1087 =================
1088 */
1089 void R_DrawAliasModel (entity_t *e, int cull)
1090 {
1091         int                     i;
1092         model_t         *clmodel;
1093         vec3_t          mins, maxs;
1094         aliashdr_t      *paliashdr;
1095         md2mem_t                *pheader;
1096         int                     anim;
1097
1098         if (modelalpha < (1.0 / 64.0))
1099                 return; // basically completely transparent
1100
1101         clmodel = currententity->model;
1102
1103         VectorAdd (currententity->origin, clmodel->mins, mins);
1104         VectorAdd (currententity->origin, clmodel->maxs, maxs);
1105
1106         if (cull && R_CullBox (mins, maxs))
1107                 return;
1108
1109         VectorCopy (currententity->origin, r_entorigin);
1110         VectorSubtract (r_origin, r_entorigin, modelorg);
1111
1112         // get lighting information
1113
1114         if (currententity->model->flags & EF_FULLBRIGHT || currententity->effects & EF_FULLBRIGHT)
1115         {
1116                 shadecolor[0] = currententity->colormod[0] * 256;
1117                 shadecolor[1] = currententity->colormod[1] * 256;
1118                 shadecolor[2] = currententity->colormod[2] * 256;
1119         }
1120         else
1121         {
1122                 R_LightPoint (shadecolor, currententity->origin);
1123
1124                 // HACK HACK HACK -- no fullbright colors, so make torches full light
1125                 if (!strcmp (currententity->model->name, "progs/flame2.mdl") || !strcmp (currententity->model->name, "progs/flame.mdl") )
1126                         shadecolor[0] = shadecolor[1] = shadecolor[2] = 128;
1127
1128                 shadecolor[0] *= currententity->colormod[0];
1129                 shadecolor[1] *= currententity->colormod[1];
1130                 shadecolor[2] *= currententity->colormod[2];
1131         }
1132
1133         // locate the proper data
1134         if (clmodel->aliastype == ALIASTYPE_MD2)
1135         {
1136                 pheader = (void *)Mod_Extradata (currententity->model);
1137                 c_alias_polys += pheader->num_tris;
1138         }
1139         else
1140         {
1141                 paliashdr = (void *)Mod_Extradata (currententity->model);
1142                 c_alias_polys += paliashdr->numtris;
1143         }
1144
1145         // draw all the triangles
1146
1147         if (clmodel->aliastype == ALIASTYPE_MD2)
1148         {
1149                 if (currententity->skinnum < 0 || currententity->skinnum >= pheader->num_skins)
1150                 {
1151                         currententity->skinnum = 0;
1152                         Con_DPrintf("invalid skin number %d for model %s\n", currententity->skinnum, clmodel->name);
1153                 }
1154                 glBindTexture(GL_TEXTURE_2D, pheader->gl_texturenum[currententity->skinnum]);
1155         }
1156         else
1157         {
1158                 if (currententity->skinnum < 0 || currententity->skinnum >= paliashdr->numskins)
1159                 {
1160                         currententity->skinnum = 0;
1161                         Con_DPrintf("invalid skin number %d for model %s\n", currententity->skinnum, clmodel->name);
1162                 }
1163                 anim = (int)(cl.time*10) & 3;
1164             glBindTexture(GL_TEXTURE_2D, paliashdr->gl_texturenum[currententity->skinnum][anim]);
1165         }
1166         glDisable(GL_ALPHA_TEST);
1167         glEnable (GL_TEXTURE_2D);
1168
1169         // we can't dynamically colormap textures, so they are cached
1170         // seperately for the players.  Heads are just uncolored.
1171         if (currententity->colormap != vid.colormap/* && !gl_nocolors.value*/)
1172         {
1173                 i = currententity - cl_entities;
1174                 if (i >= 1 && i<=cl.maxclients /* && !strcmp (currententity->model->name, "progs/player.mdl") */)
1175                     glBindTexture(GL_TEXTURE_2D, playertextures - 1 + i);
1176         }
1177
1178 //      if (gl_affinemodels.value)
1179 //              glHint (GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
1180         if (clmodel->aliastype == ALIASTYPE_MD2)
1181                 R_DrawQ2AliasFrame (pheader);
1182         else
1183                 R_DrawAliasFrame (paliashdr);
1184
1185         glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
1186 }
1187
1188 //==================================================================================
1189
1190 void R_DrawBrushModel (entity_t *e);
1191
1192 /*
1193 =============
1194 R_DrawEntitiesOnList
1195 =============
1196 */
1197 // LordHavoc: split so bmodels are rendered before any other objects
1198 void R_DrawEntitiesOnList1 (void)
1199 {
1200         int             i;
1201
1202         if (!r_drawentities.value)
1203                 return;
1204
1205         for (i=0 ; i<cl_numvisedicts ; i++)
1206         {
1207                 if (cl_visedicts[i]->model->type != mod_brush)
1208                         continue;
1209                 currententity = cl_visedicts[i];
1210                 modelalpha = currententity->alpha;
1211
1212                 R_DrawBrushModel (currententity);
1213         }
1214 }
1215
1216 void R_DrawEntitiesOnList2 (void)
1217 {
1218         int             i;
1219
1220         if (!r_drawentities.value)
1221                 return;
1222
1223         for (i=0 ; i<cl_numvisedicts ; i++)
1224         {
1225                 currententity = cl_visedicts[i];
1226                 modelalpha = currententity->alpha;
1227
1228                 switch (currententity->model->type)
1229                 {
1230                 case mod_alias:
1231                         R_DrawAliasModel (currententity, true);
1232                         break;
1233
1234                 case mod_sprite:
1235                         R_DrawSpriteModel (currententity);
1236                         break;
1237
1238                 default:
1239                         break;
1240                 }
1241         }
1242 }
1243
1244 /*
1245 =============
1246 R_DrawViewModel
1247 =============
1248 */
1249 void R_DrawViewModel (void)
1250 {
1251         if (!r_drawviewmodel.value || chase_active.value || envmap || !r_drawentities.value || cl.items & IT_INVISIBILITY || cl.stats[STAT_HEALTH] <= 0 || !cl.viewent.model)
1252                 return;
1253
1254         currententity = &cl.viewent;
1255         currententity->alpha = modelalpha = cl_entities[cl.viewentity].alpha; // LordHavoc: if the player is transparent, so is his gun
1256         currententity->effects = cl_entities[cl.viewentity].effects;
1257         currententity->scale = 1;
1258         VectorCopy(cl_entities[cl.viewentity].colormod, currententity->colormod);
1259
1260         // hack the depth range to prevent view model from poking into walls
1261         glDepthRange (gldepthmin, gldepthmin + 0.3*(gldepthmax-gldepthmin));
1262         R_DrawAliasModel (currententity, FALSE);
1263         glDepthRange (gldepthmin, gldepthmax);
1264 }
1265
1266 void R_DrawBrushModel (entity_t *e);
1267
1268 void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees );
1269
1270 void R_SetFrustum (void)
1271 {
1272         int             i;
1273
1274         if (r_refdef.fov_x == 90)
1275         {
1276                 // front side is visible
1277
1278                 VectorAdd (vpn, vright, frustum[0].normal);
1279                 VectorSubtract (vpn, vright, frustum[1].normal);
1280
1281                 VectorAdd (vpn, vup, frustum[2].normal);
1282                 VectorSubtract (vpn, vup, frustum[3].normal);
1283         }
1284         else
1285         {
1286                 // rotate VPN right by FOV_X/2 degrees
1287                 RotatePointAroundVector( frustum[0].normal, vup, vpn, -(90-r_refdef.fov_x / 2 ) );
1288                 // rotate VPN left by FOV_X/2 degrees
1289                 RotatePointAroundVector( frustum[1].normal, vup, vpn, 90-r_refdef.fov_x / 2 );
1290                 // rotate VPN up by FOV_X/2 degrees
1291                 RotatePointAroundVector( frustum[2].normal, vright, vpn, 90-r_refdef.fov_y / 2 );
1292                 // rotate VPN down by FOV_X/2 degrees
1293                 RotatePointAroundVector( frustum[3].normal, vright, vpn, -( 90 - r_refdef.fov_y / 2 ) );
1294         }
1295
1296         for (i=0 ; i<4 ; i++)
1297         {
1298                 frustum[i].type = PLANE_ANYZ;
1299                 frustum[i].dist = DotProduct (r_origin, frustum[i].normal);
1300 //              frustum[i].signbits = SignbitsForPlane (&frustum[i]);
1301                 BoxOnPlaneSideClassify(&frustum[i]);
1302         }
1303 }
1304
1305 void R_AnimateLight (void);
1306 void V_CalcBlend (void);
1307
1308 /*
1309 ===============
1310 R_SetupFrame
1311 ===============
1312 */
1313 void R_SetupFrame (void)
1314 {
1315 // don't allow cheats in multiplayer
1316         if (cl.maxclients > 1)
1317                 Cvar_Set ("r_fullbright", "0");
1318
1319         R_AnimateLight ();
1320
1321         r_framecount++;
1322
1323 // build the transformation matrix for the given view angles
1324         VectorCopy (r_refdef.vieworg, r_origin);
1325
1326         AngleVectors (r_refdef.viewangles, vpn, vright, vup);
1327
1328 // current viewleaf
1329         r_oldviewleaf = r_viewleaf;
1330         r_viewleaf = Mod_PointInLeaf (r_origin, cl.worldmodel);
1331
1332         V_SetContentsColor (r_viewleaf->contents);
1333         V_CalcBlend ();
1334
1335         r_cache_thrash = false;
1336
1337         c_brush_polys = 0;
1338         c_alias_polys = 0;
1339
1340 }
1341
1342
1343 void MYgluPerspective( GLdouble fovy, GLdouble aspect,
1344                      GLdouble zNear, GLdouble zFar )
1345 {
1346    GLdouble xmin, xmax, ymin, ymax;
1347
1348    ymax = zNear * tan( fovy * M_PI / 360.0 );
1349    ymin = -ymax;
1350
1351    xmin = ymin * aspect;
1352    xmax = ymax * aspect;
1353
1354    glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
1355 }
1356
1357
1358 extern char skyname[];
1359
1360 /*
1361 =============
1362 R_SetupGL
1363 =============
1364 */
1365 void R_SetupGL (void)
1366 {
1367         float   screenaspect;
1368         extern  int glwidth, glheight;
1369         int             x, x2, y2, y, w, h;
1370
1371         //
1372         // set up viewpoint
1373         //
1374         glMatrixMode(GL_PROJECTION);
1375     glLoadIdentity ();
1376         x = r_refdef.vrect.x * glwidth/vid.width;
1377         x2 = (r_refdef.vrect.x + r_refdef.vrect.width) * glwidth/vid.width;
1378         y = (vid.height-r_refdef.vrect.y) * glheight/vid.height;
1379         y2 = (vid.height - (r_refdef.vrect.y + r_refdef.vrect.height)) * glheight/vid.height;
1380
1381         // fudge around because of frac screen scale
1382         if (x > 0)
1383                 x--;
1384         if (x2 < glwidth)
1385                 x2++;
1386         if (y2 < 0)
1387                 y2--;
1388         if (y < glheight)
1389                 y++;
1390
1391         w = x2 - x;
1392         h = y - y2;
1393
1394         if (envmap)
1395         {
1396                 x = y2 = 0;
1397                 w = h = 256;
1398         }
1399
1400         glViewport (glx + x, gly + y2, w, h);
1401     screenaspect = (float)r_refdef.vrect.width/r_refdef.vrect.height;
1402 //      yfov = 2*atan((float)r_refdef.vrect.height/r_refdef.vrect.width)*180/M_PI;
1403 //      if (skyname[0]) // skybox enabled?
1404 //              MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  r_skyboxsize.value*1.732050807569 + 256); // this is size*sqrt(3) + 256
1405 //      else
1406                 MYgluPerspective (r_refdef.fov_y,  screenaspect,  4,  6144);
1407
1408         glCullFace(GL_FRONT);
1409
1410         glMatrixMode(GL_MODELVIEW);
1411     glLoadIdentity ();
1412
1413     glRotatef (-90,  1, 0, 0);      // put Z going up
1414     glRotatef (90,  0, 0, 1);       // put Z going up
1415     glRotatef (-r_refdef.viewangles[2],  1, 0, 0);
1416     glRotatef (-r_refdef.viewangles[0],  0, 1, 0);
1417     glRotatef (-r_refdef.viewangles[1],  0, 0, 1);
1418     glTranslatef (-r_refdef.vieworg[0],  -r_refdef.vieworg[1],  -r_refdef.vieworg[2]);
1419
1420         glGetFloatv (GL_MODELVIEW_MATRIX, r_world_matrix);
1421
1422         //
1423         // set drawing parms
1424         //
1425 //      if (gl_cull.value)
1426                 glEnable(GL_CULL_FACE);
1427 //      else
1428 //              glDisable(GL_CULL_FACE);
1429
1430         glEnable(GL_BLEND); // was Disable
1431         glDisable(GL_ALPHA_TEST);
1432         glAlphaFunc(GL_GREATER, 0.5);
1433         glEnable(GL_DEPTH_TEST);
1434         glDepthMask(1);
1435         glShadeModel(GL_SMOOTH);
1436 }
1437
1438 void R_DrawWorld (void);
1439 //void R_RenderDlights (void);
1440 void R_DrawParticles (void);
1441
1442 /*
1443 =============
1444 R_Clear
1445 =============
1446 */
1447 void R_Clear (void)
1448 {
1449 //      glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // LordHavoc: moved to SCR_UpdateScreen
1450         gldepthmin = 0;
1451         gldepthmax = 1;
1452         glDepthFunc (GL_LEQUAL);
1453
1454         glDepthRange (gldepthmin, gldepthmax);
1455 }
1456
1457 // LordHavoc: my trick to *FIX* GLQuake lighting once and for all :)
1458 void GL_Brighten()
1459 {
1460         glMatrixMode(GL_PROJECTION);
1461     glLoadIdentity ();
1462         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
1463         glMatrixMode(GL_MODELVIEW);
1464     glLoadIdentity ();
1465         glDisable (GL_DEPTH_TEST);
1466         glDisable (GL_CULL_FACE);
1467         glDisable(GL_TEXTURE_2D);
1468         glEnable(GL_BLEND);
1469         glBlendFunc (GL_DST_COLOR, GL_ONE);
1470         glBegin (GL_TRIANGLES);
1471         glColor3f (1, 1, 1);
1472         glVertex2f (-5000, -5000);
1473         glVertex2f (10000, -5000);
1474         glVertex2f (-5000, 10000);
1475         glEnd ();
1476         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1477         glDisable(GL_BLEND);
1478         glEnable(GL_TEXTURE_2D);
1479         glEnable (GL_DEPTH_TEST);
1480         glEnable (GL_CULL_FACE);
1481 }
1482
1483 extern cvar_t contrast;
1484 extern cvar_t brightness;
1485 extern cvar_t gl_lightmode;
1486
1487 void GL_BlendView()
1488 {
1489         glMatrixMode(GL_PROJECTION);
1490     glLoadIdentity ();
1491         glOrtho  (0, vid.width, vid.height, 0, -99999, 99999);
1492         glMatrixMode(GL_MODELVIEW);
1493     glLoadIdentity ();
1494         glDisable (GL_DEPTH_TEST);
1495         glDisable (GL_CULL_FACE);
1496         glDisable(GL_TEXTURE_2D);
1497         glEnable(GL_BLEND);
1498         if (lighthalf)
1499         {
1500                 glBlendFunc (GL_DST_COLOR, GL_ONE);
1501                 glBegin (GL_TRIANGLES);
1502                 glColor3f (1, 1, 1);
1503                 glVertex2f (-5000, -5000);
1504                 glVertex2f (10000, -5000);
1505                 glVertex2f (-5000, 10000);
1506                 glEnd ();
1507         }
1508         glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1509         contrast.value = bound(0.2, contrast.value, 1.0);
1510         if (/*gl_polyblend.value && */v_blend[3])
1511         {
1512                 glBegin (GL_TRIANGLES);
1513                 glColor4fv (v_blend);
1514                 glVertex2f (-5000, -5000);
1515                 glVertex2f (10000, -5000);
1516                 glVertex2f (-5000, 10000);
1517                 glEnd ();
1518         }
1519
1520         glEnable (GL_CULL_FACE);
1521         glEnable (GL_DEPTH_TEST);
1522         glDisable(GL_BLEND);
1523         glEnable(GL_TEXTURE_2D);
1524 }
1525
1526 #define TIMEREPORT(DESC) \
1527         if (r_speeds2.value)\
1528         {\
1529                 temptime = -currtime;\
1530                 currtime = Sys_FloatTime();\
1531                 temptime += currtime;\
1532                 Con_Printf(DESC " %.4fms ", temptime * 1000.0);\
1533         }
1534
1535 /*
1536 ================
1537 R_RenderView
1538
1539 r_refdef must be set before the first call
1540 ================
1541 */
1542 void R_RenderView (void)
1543 {
1544         double currtime, temptime;
1545 //      if (r_norefresh.value)
1546 //              return;
1547
1548         if (!r_worldentity.model || !cl.worldmodel)
1549                 Sys_Error ("R_RenderView: NULL worldmodel");
1550
1551         lighthalf = gl_lightmode.value;
1552
1553         FOG_framebegin();
1554         transpolyclear();
1555         wallpolyclear();
1556
1557         if (r_speeds2.value)
1558         {
1559                 currtime = Sys_FloatTime();
1560                 Con_Printf("render time: ");
1561         }
1562         R_Clear();
1563         TIMEREPORT("R_Clear")
1564
1565         // render normal view
1566
1567         R_SetupFrame ();
1568         TIMEREPORT("R_SetupFrame")
1569         R_SetFrustum ();
1570         TIMEREPORT("R_SetFrustum")
1571         R_SetupGL ();
1572         TIMEREPORT("R_SetupGL")
1573         R_MarkLeaves ();        // done here so we know if we're in water
1574         TIMEREPORT("R_MarkLeaves")
1575         R_DrawWorld ();         // adds static entities to the list
1576         TIMEREPORT("R_DrawWorld")
1577         S_ExtraUpdate ();       // don't let sound get messed up if going slow
1578         TIMEREPORT("S_ExtraUpdate")
1579         R_DrawEntitiesOnList1 (); // BSP models
1580         TIMEREPORT("R_DrawEntitiesOnList1")
1581         wallpolyrender();
1582         TIMEREPORT("wallpolyrender")
1583         R_DrawEntitiesOnList2 (); // other models
1584         TIMEREPORT("R_DrawEntitiesOnList2")
1585 //      R_RenderDlights ();
1586         R_DrawViewModel ();
1587         TIMEREPORT("R_DrawViewModel")
1588         R_DrawParticles ();
1589         TIMEREPORT("R_DrawParticles")
1590         transpolyrender();
1591         TIMEREPORT("transpolyrender")
1592
1593         FOG_frameend();
1594         GL_BlendView();
1595         TIMEREPORT("GL_BlendView")
1596         if (r_speeds2.value)
1597                 Con_Printf("\n");
1598 }