cl_particles.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
  21 #include "quakedef.h"
  22 #include "cl_collision.h"
  23
  24 #define MAX_PARTICLES                   16384   // default max # of particles at one time
  25 #define ABSOLUTE_MIN_PARTICLES  512             // no fewer than this no matter what's on the command line
  26
  27 typedef enum
  28 {
  29         pt_static, pt_grav, pt_blob, pt_blob2, pt_bulletsmoke, pt_smoke, pt_snow, pt_rain, pt_spark, pt_bubble, pt_fade, pt_steam, pt_splash, pt_splashpuff, pt_flame, pt_blood, pt_oneframe, pt_lavasplash, pt_raindropsplash, pt_underwaterspark, pt_explosionsplash, pt_stardust
  30 }
  31 ptype_t;
  32
  33 #define P_TEXNUM_FIRSTBIT 0
  34 #define P_TEXNUM_BITS 6
  35 #define P_ORIENTATION_FIRSTBIT (P_TEXNUM_FIRSTBIT + P_TEXNUM_BITS)
  36 #define P_ORIENTATION_BITS 2
  37 #define P_FLAGS_FIRSTBIT (P_ORIENTATION_FIRSTBIT + P_ORIENTATION_BITS)
  38 #define P_DYNLIGHT (1 << (P_FLAGS_FIRSTBIT + 0))
  39 #define P_ADDITIVE (1 << (P_FLAGS_FIRSTBIT + 1))
  40
  41 typedef struct particle_s
  42 {
  43         ptype_t         type;
  44         unsigned int    flags; // dynamically lit, orientation, additive blending, texnum
  45         vec3_t          org;
  46         vec3_t          vel;
  47         float           die;
  48         float           scalex;
  49         float           scaley;
  50         float           alpha; // 0-255
  51         float           time2; // used for various things (snow fluttering, for example)
  52         float           bounce; // how much bounce-back from a surface the particle hits (0 = no physics, 1 = stop and slide, 2 = keep bouncing forever, 1.5 is typical)
  53         vec3_t          oldorg;
  54         vec3_t          vel2; // used for snow fluttering (base velocity, wind for instance)
  55         float           friction; // how much air friction affects this object (objects with a low mass/size ratio tend to get more air friction)
  56         float           pressure; // if non-zero, apply pressure to other particles
  57         qbyte           color[4];
  58 }
  59 particle_t;
  60
  61 static int particlepalette[256] =
  62 {
  63         0x000000,0x0f0f0f,0x1f1f1f,0x2f2f2f,0x3f3f3f,0x4b4b4b,0x5b5b5b,0x6b6b6b,
  64         0x7b7b7b,0x8b8b8b,0x9b9b9b,0xababab,0xbbbbbb,0xcbcbcb,0xdbdbdb,0xebebeb,
  65         0x0f0b07,0x170f0b,0x1f170b,0x271b0f,0x2f2313,0x372b17,0x3f2f17,0x4b371b,
  66         0x533b1b,0x5b431f,0x634b1f,0x6b531f,0x73571f,0x7b5f23,0x836723,0x8f6f23,
  67         0x0b0b0f,0x13131b,0x1b1b27,0x272733,0x2f2f3f,0x37374b,0x3f3f57,0x474767,
  68         0x4f4f73,0x5b5b7f,0x63638b,0x6b6b97,0x7373a3,0x7b7baf,0x8383bb,0x8b8bcb,
  69         0x000000,0x070700,0x0b0b00,0x131300,0x1b1b00,0x232300,0x2b2b07,0x2f2f07,
  70         0x373707,0x3f3f07,0x474707,0x4b4b0b,0x53530b,0x5b5b0b,0x63630b,0x6b6b0f,
  71         0x070000,0x0f0000,0x170000,0x1f0000,0x270000,0x2f0000,0x370000,0x3f0000,
  72         0x470000,0x4f0000,0x570000,0x5f0000,0x670000,0x6f0000,0x770000,0x7f0000,
  73         0x131300,0x1b1b00,0x232300,0x2f2b00,0x372f00,0x433700,0x4b3b07,0x574307,
  74         0x5f4707,0x6b4b0b,0x77530f,0x835713,0x8b5b13,0x975f1b,0xa3631f,0xaf6723,
  75         0x231307,0x2f170b,0x3b1f0f,0x4b2313,0x572b17,0x632f1f,0x733723,0x7f3b2b,
  76         0x8f4333,0x9f4f33,0xaf632f,0xbf772f,0xcf8f2b,0xdfab27,0xefcb1f,0xfff31b,
  77         0x0b0700,0x1b1300,0x2b230f,0x372b13,0x47331b,0x533723,0x633f2b,0x6f4733,
  78         0x7f533f,0x8b5f47,0x9b6b53,0xa77b5f,0xb7876b,0xc3937b,0xd3a38b,0xe3b397,
  79         0xab8ba3,0x9f7f97,0x937387,0x8b677b,0x7f5b6f,0x775363,0x6b4b57,0x5f3f4b,
  80         0x573743,0x4b2f37,0x43272f,0x371f23,0x2b171b,0x231313,0x170b0b,0x0f0707,
  81         0xbb739f,0xaf6b8f,0xa35f83,0x975777,0x8b4f6b,0x7f4b5f,0x734353,0x6b3b4b,
  82         0x5f333f,0x532b37,0x47232b,0x3b1f23,0x2f171b,0x231313,0x170b0b,0x0f0707,
  83         0xdbc3bb,0xcbb3a7,0xbfa39b,0xaf978b,0xa3877b,0x977b6f,0x876f5f,0x7b6353,
  84         0x6b5747,0x5f4b3b,0x533f33,0x433327,0x372b1f,0x271f17,0x1b130f,0x0f0b07,
  85         0x6f837b,0x677b6f,0x5f7367,0x576b5f,0x4f6357,0x475b4f,0x3f5347,0x374b3f,
  86         0x2f4337,0x2b3b2f,0x233327,0x1f2b1f,0x172317,0x0f1b13,0x0b130b,0x070b07,
  87         0xfff31b,0xefdf17,0xdbcb13,0xcbb70f,0xbba70f,0xab970b,0x9b8307,0x8b7307,
  88         0x7b6307,0x6b5300,0x5b4700,0x4b3700,0x3b2b00,0x2b1f00,0x1b0f00,0x0b0700,
  89         0x0000ff,0x0b0bef,0x1313df,0x1b1bcf,0x2323bf,0x2b2baf,0x2f2f9f,0x2f2f8f,
  90         0x2f2f7f,0x2f2f6f,0x2f2f5f,0x2b2b4f,0x23233f,0x1b1b2f,0x13131f,0x0b0b0f,
  91         0x2b0000,0x3b0000,0x4b0700,0x5f0700,0x6f0f00,0x7f1707,0x931f07,0xa3270b,
  92         0xb7330f,0xc34b1b,0xcf632b,0xdb7f3b,0xe3974f,0xe7ab5f,0xefbf77,0xf7d38b,
  93         0xa77b3b,0xb79b37,0xc7c337,0xe7e357,0x7fbfff,0xabe7ff,0xd7ffff,0x670000,
  94         0x8b0000,0xb30000,0xd70000,0xff0000,0xfff393,0xfff7c7,0xffffff,0x9f5b53
  95 };
  96
  97 static int explosparkramp[8] = {0x4b0700, 0x6f0f00, 0x931f07, 0xb7330f, 0xcf632b, 0xe3974f, 0xffe7b5, 0xffffff};
  98
  99 // these must match r_part.c's textures
 100 static const int tex_smoke[8] = {0, 1, 2, 3, 4, 5, 6, 7};
 101 static const int tex_rainsplash[16] = {8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23};
 102 static const int tex_particle = 24;
 103 static const int tex_rain = 25;
 104 static const int tex_bubble = 26;
 105
 106 static int                      cl_maxparticles;
 107 static int                      cl_numparticles;
 108 static particle_t       *particles;
 109 static particle_t       **freeparticles; // list used only in compacting particles array
 110
 111 static cvar_t cl_particles = {CVAR_SAVE, "cl_particles", "1"};
 112 static cvar_t cl_particles_size = {CVAR_SAVE, "cl_particles_size", "1"};
 113 static cvar_t cl_particles_bloodshowers = {CVAR_SAVE, "cl_particles_bloodshowers", "1"};
 114 static cvar_t cl_particles_blood = {CVAR_SAVE, "cl_particles_blood", "1"};
 115 static cvar_t cl_particles_blood_size_min = {CVAR_SAVE, "cl_particles_blood_size_min", "5"};
 116 static cvar_t cl_particles_blood_size_max = {CVAR_SAVE, "cl_particles_blood_size_max", "10"};
 117 static cvar_t cl_particles_blood_alpha = {CVAR_SAVE, "cl_particles_blood_alpha", "0.5"};
 118 static cvar_t cl_particles_smoke = {CVAR_SAVE, "cl_particles_smoke", "1"};
 119 static cvar_t cl_particles_sparks = {CVAR_SAVE, "cl_particles_sparks", "1"};
 120 static cvar_t cl_particles_bubbles = {CVAR_SAVE, "cl_particles_bubbles", "1"};
 121 static cvar_t cl_particles_explosions = {CVAR_SAVE, "cl_particles_explosions", "0"};
 122
 123 static mempool_t *cl_part_mempool;
 124
 125 void CL_Particles_Clear(void)
 126 {
 127         cl_numparticles = 0;
 128 }
 129
 130 /*
 131 ===============
 132 CL_InitParticles
 133 ===============
 134 */
 135 void CL_ReadPointFile_f (void);
 136 void CL_Particles_Init (void)
 137 {
 138         int             i;
 139
 140         i = COM_CheckParm ("-particles");
 141
 142         if (i)
 143         {
 144                 cl_maxparticles = (int)(atoi(com_argv[i+1]));
 145                 if (cl_maxparticles < ABSOLUTE_MIN_PARTICLES)
 146                         cl_maxparticles = ABSOLUTE_MIN_PARTICLES;
 147         }
 148         else
 149                 cl_maxparticles = MAX_PARTICLES;
 150
 151         Cmd_AddCommand ("pointfile", CL_ReadPointFile_f);
 152
 153         Cvar_RegisterVariable (&cl_particles);
 154         Cvar_RegisterVariable (&cl_particles_size);
 155         Cvar_RegisterVariable (&cl_particles_bloodshowers);
 156         Cvar_RegisterVariable (&cl_particles_blood);
 157         Cvar_RegisterVariable (&cl_particles_blood_size_min);
 158         Cvar_RegisterVariable (&cl_particles_blood_size_max);
 159         Cvar_RegisterVariable (&cl_particles_blood_alpha);
 160         Cvar_RegisterVariable (&cl_particles_smoke);
 161         Cvar_RegisterVariable (&cl_particles_sparks);
 162         Cvar_RegisterVariable (&cl_particles_bubbles);
 163         Cvar_RegisterVariable (&cl_particles_explosions);
 164
 165         cl_part_mempool = Mem_AllocPool("CL_Part");
 166         particles = (particle_t *) Mem_Alloc(cl_part_mempool, cl_maxparticles * sizeof(particle_t));
 167         freeparticles = (void *) Mem_Alloc(cl_part_mempool, cl_maxparticles * sizeof(particle_t *));
 168         cl_numparticles = 0;
 169 }
 170
 171 #define particle(ptype, porientation, pcolor1, pcolor2, ptex, plight, padditive, pscalex, pscaley, palpha, ptime, pbounce, px, py, pz, pvx, pvy, pvz, ptime2, pvx2, pvy2, pvz2, pfriction, ppressure)\
 172 {\
 173         if (cl_numparticles >= cl_maxparticles)\
 174                 return;\
 175         {\
 176                 particle_t      *part;\
 177                 int tempcolor, tempcolor2, cr1, cg1, cb1, cr2, cg2, cb2;\
 178                 unsigned int partflags;\
 179                 partflags = ((porientation) << P_ORIENTATION_FIRSTBIT) | ((ptex) << P_TEXNUM_FIRSTBIT);\
 180                 if (padditive)\
 181                         partflags |= P_ADDITIVE;\
 182                 if (plight)\
 183                         partflags |= P_DYNLIGHT;\
 184                 tempcolor = (pcolor1);\
 185                 tempcolor2 = (pcolor2);\
 186                 cr2 = ((tempcolor2) >> 16) & 0xFF;\
 187                 cg2 = ((tempcolor2) >> 8) & 0xFF;\
 188                 cb2 = (tempcolor2) & 0xFF;\
 189                 if (tempcolor != tempcolor2)\
 190                 {\
 191                         cr1 = ((tempcolor) >> 16) & 0xFF;\
 192                         cg1 = ((tempcolor) >> 8) & 0xFF;\
 193                         cb1 = (tempcolor) & 0xFF;\
 194                         tempcolor = rand() & 0xFF;\
 195                         cr2 = (((cr2 - cr1) * tempcolor) >> 8) + cr1;\
 196                         cg2 = (((cg2 - cg1) * tempcolor) >> 8) + cg1;\
 197                         cb2 = (((cb2 - cb1) * tempcolor) >> 8) + cb1;\
 198                 }\
 199                 part = &particles[cl_numparticles++];\
 200                 part->type = (ptype);\
 201                 part->color[0] = cr2;\
 202                 part->color[1] = cg2;\
 203                 part->color[2] = cb2;\
 204                 part->color[3] = 0xFF;\
 205                 part->flags = partflags;\
 206                 part->scalex = (pscalex);\
 207                 part->scaley = (pscaley);\
 208                 part->alpha = (palpha);\
 209                 part->die = cl.time + (ptime);\
 210                 part->bounce = (pbounce);\
 211                 part->org[0] = (px);\
 212                 part->org[1] = (py);\
 213                 part->org[2] = (pz);\
 214                 part->vel[0] = (pvx);\
 215                 part->vel[1] = (pvy);\
 216                 part->vel[2] = (pvz);\
 217                 part->time2 = (ptime2);\
 218                 part->vel2[0] = (pvx2);\
 219                 part->vel2[1] = (pvy2);\
 220                 part->vel2[2] = (pvz2);\
 221                 part->friction = (pfriction);\
 222                 part->pressure = (ppressure);\
 223         }\
 224 }
 225
 226 /*
 227 ===============
 228 CL_EntityParticles
 229 ===============
 230 */
 231 void CL_EntityParticles (entity_t *ent)
 232 {
 233         int                     i;
 234         float           angle;
 235         float           sp, sy, cp, cy;
 236         vec3_t          forward;
 237         float           dist;
 238         float           beamlength;
 239         static vec3_t avelocities[NUMVERTEXNORMALS];
 240         if (!cl_particles.integer) return;
 241
 242         dist = 64;
 243         beamlength = 16;
 244
 245         if (!avelocities[0][0])
 246                 for (i=0 ; i<NUMVERTEXNORMALS*3 ; i++)
 247                         avelocities[0][i] = (rand()&255) * 0.01;
 248
 249         for (i=0 ; i<NUMVERTEXNORMALS ; i++)
 250         {
 251                 angle = cl.time * avelocities[i][0];
 252                 sy = sin(angle);
 253                 cy = cos(angle);
 254                 angle = cl.time * avelocities[i][1];
 255                 sp = sin(angle);
 256                 cp = cos(angle);
 257
 258                 forward[0] = cp*cy;
 259                 forward[1] = cp*sy;
 260                 forward[2] = -sp;
 261
 262                 particle(pt_oneframe, PARTICLE_BILLBOARD, particlepalette[0x6f], particlepalette[0x6f], tex_particle, false, false, 2, 2, 255, 9999, 0, ent->render.origin[0] + m_bytenormals[i][0]*dist + forward[0]*beamlength, ent->render.origin[1] + m_bytenormals[i][1]*dist + forward[1]*beamlength, ent->render.origin[2] + m_bytenormals[i][2]*dist + forward[2]*beamlength, 0, 0, 0, 0, 0, 0, 0, 0, 0);
 263         }
 264 }
 265
 266
 267 void CL_ReadPointFile_f (void)
 268 {
 269         vec3_t  org;
 270         int             r, c;
 271         char    *pointfile, *pointfilepos, *t, tchar;
 272
 273         pointfile = COM_LoadFile(va("maps/%s.pts", sv.name), true);
 274         if (!pointfile)
 275         {
 276                 Con_Printf ("couldn't open %s.pts\n", sv.name);
 277                 return;
 278         }
 279
 280         Con_Printf ("Reading %s.pts...\n", sv.name);
 281         c = 0;
 282         pointfilepos = pointfile;
 283         while (*pointfilepos)
 284         {
 285                 while (*pointfilepos == '\n' || *pointfilepos == '\r')
 286                         pointfilepos++;
 287                 if (!*pointfilepos)
 288                         break;
 289                 t = pointfilepos;
 290                 while (*t && *t != '\n' && *t != '\r')
 291                         t++;
 292                 tchar = *t;
 293                 *t = 0;
 294                 r = sscanf (pointfilepos,"%f %f %f", &org[0], &org[1], &org[2]);
 295                 *t = tchar;
 296                 pointfilepos = t;
 297                 if (r != 3)
 298                         break;
 299                 c++;
 300
 301                 if (cl_numparticles >= cl_maxparticles)
 302                 {
 303                         Con_Printf ("Not enough free particles\n");
 304                         break;
 305                 }
 306                 particle(pt_static, PARTICLE_BILLBOARD, particlepalette[(-c)&15], particlepalette[(-c)&15], tex_particle, false, false, 2, 2, 255, 99999, 0, org[0], org[1], org[2], 0, 0, 0, 0, 0, 0, 0, 0, 0);
 307         }
 308
 309         Mem_Free(pointfile);
 310         Con_Printf ("%i points read\n", c);
 311 }
 312
 313 /*
 314 ===============
 315 CL_ParseParticleEffect
 316
 317 Parse an effect out of the server message
 318 ===============
 319 */
 320 void CL_ParseParticleEffect (void)
 321 {
 322         vec3_t          org, dir;
 323         int                     i, count, msgcount, color;
 324
 325         for (i=0 ; i<3 ; i++)
 326                 org[i] = MSG_ReadCoord ();
 327         for (i=0 ; i<3 ; i++)
 328                 dir[i] = MSG_ReadChar () * (1.0/16);
 329         msgcount = MSG_ReadByte ();
 330         color = MSG_ReadByte ();
 331
 332         if (msgcount == 255)
 333                 count = 1024;
 334         else
 335                 count = msgcount;
 336
 337         CL_RunParticleEffect (org, dir, color, count);
 338 }
 339
 340 /*
 341 ===============
 342 CL_ParticleExplosion
 343
 344 ===============
 345 */
 346 void CL_ParticleExplosion (vec3_t org, int smoke)
 347 {
 348         int i;
 349         R_Stain(org, 96, 80, 80, 80, 128, 176, 176, 176, 128);
 350
 351         i = Mod_PointInLeaf(org, cl.worldmodel)->contents;
 352         if (i == CONTENTS_SLIME || i == CONTENTS_WATER)
 353                 for (i = 0;i < 128;i++)
 354                         particle(pt_bubble, PARTICLE_BILLBOARD, 0x808080, 0xFFFFFF, tex_bubble, false, true, 2, 2, 255, 9999, 1.5, org[0] + lhrandom(-16, 16), org[1] + lhrandom(-16, 16), org[2] + lhrandom(-16, 16), lhrandom(-96, 96), lhrandom(-96, 96), lhrandom(-96, 96), 0, 0, 0, 0, 0, 0);
 355
 356         if (cl_particles.integer && cl_particles_explosions.integer)
 357         {
 358                 int j, k;
 359                 float f;
 360                 vec3_t v, end, ang;
 361                 qbyte noise1[32*32], noise2[32*32];
 362
 363                 VectorClear(end); // hush MSVC
 364                 i = Mod_PointInLeaf(org, cl.worldmodel)->contents;
 365                 if (i == CONTENTS_SLIME || i == CONTENTS_WATER)
 366                 {
 367                         ang[2] = lhrandom(0, 360);
 368                         fractalnoisequick(noise1, 32, 4);
 369                         fractalnoisequick(noise2, 32, 8);
 370                         for (i = 0;i < 32;i++)
 371                         {
 372                                 for (j = 0;j < 32;j++)
 373                                 {
 374                                         VectorRandom(v);
 375                                         VectorMA(org, 16, v, v);
 376                                         CL_TraceLine(org, v, end, NULL, 0, true);
 377                                         ang[0] = (j + 0.5f) * (360.0f / 32.0f);
 378                                         ang[1] = (i + 0.5f) * (360.0f / 32.0f);
 379                                         AngleVectors(ang, v, NULL, NULL);
 380                                         f = noise1[j*32+i] * 1.5f;
 381                                         VectorScale(v, f, v);
 382                                         k = noise2[j*32+i] * 0x010101;
 383                                         particle(pt_underwaterspark, PARTICLE_BILLBOARD, k, k, tex_smoke[rand()&7], false, true, 10, 10, lhrandom(128, 255), 9999, 1.5, end[0], end[1], end[2], v[0], v[1], v[2], 512.0f, 0, 0, 0, 2, 0);
 384                                         VectorScale(v, 0.75, v);
 385                                         k = explosparkramp[(noise2[j*32+i] >> 5)];
 386                                         particle(pt_underwaterspark, PARTICLE_BILLBOARD, k, k, tex_particle, false, true, 10, 10, lhrandom(128, 255), 9999, 1.5, end[0], end[1], end[2], v[0], v[1], v[2], 512.0f, 0, 0, 0, 2, 0);
 387                                 }
 388                         }
 389                 }
 390                 else
 391                 {
 392                         ang[2] = lhrandom(0, 360);
 393                         fractalnoisequick(noise1, 32, 4);
 394                         fractalnoisequick(noise2, 32, 8);
 395                         for (i = 0;i < 32;i++)
 396                         {
 397                                 for (j = 0;j < 32;j++)
 398                                 {
 399                                         VectorRandom(v);
 400                                         VectorMA(org, 16, v, v);
 401                                         CL_TraceLine(org, v, end, NULL, 0, true);
 402                                         ang[0] = (j + 0.5f) * (360.0f / 32.0f);
 403                                         ang[1] = (i + 0.5f) * (360.0f / 32.0f);
 404                                         AngleVectors(ang, v, NULL, NULL);
 405                                         f = noise1[j*32+i] * 1.5f;
 406                                         VectorScale(v, f, v);
 407                                         k = noise2[j*32+i] * 0x010101;
 408                                         particle(pt_spark, PARTICLE_BILLBOARD, k, k, tex_smoke[rand()&7], false, true, 10, 10, lhrandom(128, 255), 9999, 1.5, end[0], end[1], end[2], v[0], v[1], v[2] + 160.0f, 512.0f, 0, 0, 0, 2, 0);
 409                                         VectorScale(v, 0.75, v);
 410                                         k = explosparkramp[(noise2[j*32+i] >> 5)];
 411                                         particle(pt_spark, PARTICLE_BILLBOARD, k, k, tex_particle, false, true, 10, 10, lhrandom(128, 255), 9999, 1.5, end[0], end[1], end[2], v[0], v[1], v[2] + 160.0f, 512.0f, 0, 0, 0, 2, 0);
 412                                 }
 413                         }
 414                 }
 415         }
 416         else
 417                 R_NewExplosion(org);
 418 }
 419
 420 /*
 421 ===============
 422 CL_ParticleExplosion2
 423
 424 ===============
 425 */
 426 void CL_ParticleExplosion2 (vec3_t org, int colorStart, int colorLength)
 427 {
 428         int i, k;
 429         if (!cl_particles.integer) return;
 430
 431         for (i = 0;i < 512;i++)
 432         {
 433                 k = particlepalette[colorStart + (i % colorLength)];
 434                 particle(pt_fade, PARTICLE_BILLBOARD, k, k, tex_particle, false, false, 1.5, 1.5, 255, 0.3, 0, org[0] + lhrandom(-8, 8), org[1] + lhrandom(-8, 8), org[2] + lhrandom(-8, 8), lhrandom(-192, 192), lhrandom(-192, 192), lhrandom(-192, 192), 384, 0, 0, 0, 1, 0);
 435         }
 436 }
 437
 438 /*
 439 ===============
 440 CL_BlobExplosion
 441
 442 ===============
 443 */
 444 void CL_BlobExplosion (vec3_t org)
 445 {
 446         if (!cl_particles.integer) return;
 447
 448         R_Stain(org, 96, 80, 80, 80, 128, 176, 176, 176, 128);
 449
 450         R_NewExplosion(org);
 451 }
 452
 453 /*
 454 ===============
 455 CL_RunParticleEffect
 456
 457 ===============
 458 */
 459 void CL_RunParticleEffect (vec3_t org, vec3_t dir, int color, int count)
 460 {
 461         int k;
 462         if (!cl_particles.integer) return;
 463
 464         if (count == 1024)
 465         {
 466                 CL_ParticleExplosion(org, false);
 467                 return;
 468         }
 469         while (count--)
 470         {
 471                 k = particlepalette[color + (rand()&7)];
 472                 particle(pt_fade, PARTICLE_BILLBOARD, k, k, tex_particle, false, false, 1, 1, 128, 9999, 0, org[0] + lhrandom(-8, 8), org[1] + lhrandom(-8, 8), org[2] + lhrandom(-8, 8), lhrandom(-15, 15), lhrandom(-15, 15), lhrandom(-15, 15), 384, 0, 0, 0, 0, 0);
 473         }
 474 }
 475
 476 // LordHavoc: added this for spawning sparks/dust (which have strong gravity)
 477 /*
 478 ===============
 479 CL_SparkShower
 480 ===============
 481 */
 482 void CL_SparkShower (vec3_t org, vec3_t dir, int count)
 483 {
 484         int k;
 485         if (!cl_particles.integer) return;
 486
 487         R_Stain(org, 32, 96, 96, 96, 32, 128, 128, 128, 32);
 488
 489         // smoke puff
 490         if (cl_particles_smoke.integer)
 491                 particle(pt_bulletsmoke, PARTICLE_BILLBOARD, 0xA0A0A0, 0xFFFFFF, tex_smoke[rand()&7], true, true, 2, 2, 255, 9999, 0, org[0], org[1], org[2], lhrandom(-8, 8), lhrandom(-8, 8), lhrandom(0, 16), 0, 0, 0, 0, 0, 0);
 492
 493         if (cl_particles_sparks.integer)
 494         {
 495                 // sparks
 496                 while(count--)
 497                 {
 498                         k = particlepalette[0x68 + (rand() & 7)];
 499                         particle(pt_spark, PARTICLE_BILLBOARD, k, k, tex_particle, false, true, 1, 1, lhrandom(64, 128), 9999, 0, org[0], org[1], org[2], lhrandom(-64, 64) + dir[0], lhrandom(-64, 64) + dir[1], lhrandom(0, 128) + dir[2], 480, 0, 0, 0, 1, 0);
 500                 }
 501         }
 502 }
 503
 504 void CL_PlasmaBurn (vec3_t org)
 505 {
 506         if (!cl_particles.integer) return;
 507
 508         R_Stain(org, 48, 96, 96, 96, 48, 128, 128, 128, 48);
 509 }
 510
 511 void CL_BloodPuff (vec3_t org, vec3_t vel, int count)
 512 {
 513         float r, s;
 514         // bloodcount is used to accumulate counts too small to cause a blood particle
 515         static int bloodcount = 0;
 516         if (!cl_particles.integer) return;
 517         if (!cl_particles_blood.integer) return;
 518
 519         s = count + 32.0f;
 520         count *= 5.0f;
 521         if (count > 1000)
 522                 count = 1000;
 523         bloodcount += count;
 524         while(bloodcount > 0)
 525         {
 526                 r = lhrandom(cl_particles_blood_size_min.value, cl_particles_blood_size_max.value);
 527                 particle(pt_blood, PARTICLE_BILLBOARD, 0x000000, 0x200000, tex_smoke[rand()&7], true, false, r, r, cl_particles_blood_alpha.value * 255, 9999, -1, org[0], org[1], org[2], vel[0] + lhrandom(-s, s), vel[1] + lhrandom(-s, s), vel[2] + lhrandom(-s, s), 0, 0, 0, 0, 1, 0);
 528                 bloodcount -= r;
 529         }
 530 }
 531
 532 void CL_BloodShower (vec3_t mins, vec3_t maxs, float velspeed, int count)
 533 {
 534         float c;
 535         float r;
 536         vec3_t diff, center, velscale;
 537         if (!cl_particles.integer) return;
 538         if (!cl_particles_bloodshowers.integer) return;
 539         if (!cl_particles_blood.integer) return;
 540
 541         VectorSubtract(maxs, mins, diff);
 542         center[0] = (mins[0] + maxs[0]) * 0.5;
 543         center[1] = (mins[1] + maxs[1]) * 0.5;
 544         center[2] = (mins[2] + maxs[2]) * 0.5;
 545         // FIXME: change velspeed back to 2.0x after fixing mod
 546         velscale[0] = velspeed * 2.0 / diff[0];
 547         velscale[1] = velspeed * 2.0 / diff[1];
 548         velscale[2] = velspeed * 2.0 / diff[2];
 549
 550         c = count * 5;
 551         while (c > 0)
 552         {
 553                 vec3_t org, vel;
 554                 org[0] = lhrandom(mins[0], maxs[0]);
 555                 org[1] = lhrandom(mins[1], maxs[1]);
 556                 org[2] = lhrandom(mins[2], maxs[2]);
 557                 vel[0] = (org[0] - center[0]) * velscale[0];
 558                 vel[1] = (org[1] - center[1]) * velscale[1];
 559                 vel[2] = (org[2] - center[2]) * velscale[2];
 560                 r = lhrandom(cl_particles_blood_size_min.value, cl_particles_blood_size_max.value);
 561                 c -= r;
 562                 particle(pt_blood, PARTICLE_BILLBOARD, 0x000000, 0x200000, tex_smoke[rand()&7], true, false, r, r, cl_particles_blood_alpha.value * 255, 9999, -1, org[0], org[1], org[2], vel[0], vel[1], vel[2], 0, 0, 0, 0, 1, 0);
 563         }
 564 }
 565
 566 void CL_ParticleCube (vec3_t mins, vec3_t maxs, vec3_t dir, int count, int colorbase, int gravity, int randomvel)
 567 {
 568         int k;
 569         float t;
 570         if (!cl_particles.integer) return;
 571         if (maxs[0] <= mins[0]) {t = mins[0];mins[0] = maxs[0];maxs[0] = t;}
 572         if (maxs[1] <= mins[1]) {t = mins[1];mins[1] = maxs[1];maxs[1] = t;}
 573         if (maxs[2] <= mins[2]) {t = mins[2];mins[2] = maxs[2];maxs[2] = t;}
 574
 575         while (count--)
 576         {
 577                 k = particlepalette[colorbase + (rand()&3)];
 578                 particle(gravity ? pt_grav : pt_static, PARTICLE_BILLBOARD, k, k, tex_particle, false, false, 2, 2, 255, lhrandom(1, 2), 0, lhrandom(mins[0], maxs[0]), lhrandom(mins[1], maxs[1]), lhrandom(mins[2], maxs[2]), dir[0] + lhrandom(-randomvel, randomvel), dir[1] + lhrandom(-randomvel, randomvel), dir[2] + lhrandom(-randomvel, randomvel), 0, 0, 0, 0, 0, 0);
 579         }
 580 }
 581
 582 void CL_ParticleRain (vec3_t mins, vec3_t maxs, vec3_t dir, int count, int colorbase, int type)
 583 {
 584         int k;
 585         vec3_t vel;
 586         float t, z;
 587         if (!cl_particles.integer) return;
 588         if (maxs[0] <= mins[0]) {t = mins[0];mins[0] = maxs[0];maxs[0] = t;}
 589         if (maxs[1] <= mins[1]) {t = mins[1];mins[1] = maxs[1];maxs[1] = t;}
 590         if (maxs[2] <= mins[2]) {t = mins[2];mins[2] = maxs[2];maxs[2] = t;}
 591         if (dir[2] < 0) // falling
 592         {
 593                 t = (maxs[2] - mins[2]) / -dir[2];
 594                 z = maxs[2];
 595         }
 596         else // rising??
 597         {
 598                 t = (maxs[2] - mins[2]) / dir[2];
 599                 z = mins[2];
 600         }
 601         if (t < 0 || t > 2) // sanity check
 602                 t = 2;
 603
 604         switch(type)
 605         {
 606         case 0:
 607                 count *= 4; // ick, this should be in the mod or maps?
 608
 609                 while(count--)
 610                 {
 611                         vel[0] = dir[0] + lhrandom(-16, 16);
 612                         vel[1] = dir[1] + lhrandom(-16, 16);
 613                         vel[2] = dir[2] + lhrandom(-32, 32);
 614                         k = particlepalette[colorbase + (rand()&3)];
 615                         particle(pt_rain, PARTICLE_UPRIGHT_FACING, k, k, tex_particle, true, true, 1, 64, 64, t, 0, lhrandom(mins[0], maxs[0]), lhrandom(mins[1], maxs[1]), z, vel[0], vel[1], vel[2], 0, vel[0], vel[1], vel[2], 0, 0);
 616                 }
 617                 break;
 618         case 1:
 619                 while(count--)
 620                 {
 621                         vel[0] = dir[0] + lhrandom(-16, 16);
 622                         vel[1] = dir[1] + lhrandom(-16, 16);
 623                         vel[2] = dir[2] + lhrandom(-32, 32);
 624                         k = particlepalette[colorbase + (rand()&3)];
 625                         particle(pt_snow, PARTICLE_BILLBOARD, k, k, tex_particle, false, true, 2, 2, 255, t, 0, lhrandom(mins[0], maxs[0]), lhrandom(mins[1], maxs[1]), z, vel[0], vel[1], vel[2], 0, vel[0], vel[1], vel[2], 0, 0);
 626                 }
 627                 break;
 628         default:
 629                 Host_Error("CL_ParticleRain: unknown type %i (0 = rain, 1 = snow)\n", type);
 630         }
 631 }
 632
 633 void CL_Stardust (vec3_t mins, vec3_t maxs, int count)
 634 {
 635         int k;
 636         float t;
 637         vec3_t o, v, center;
 638         if (!cl_particles.integer) return;
 639
 640         if (maxs[0] <= mins[0]) {t = mins[0];mins[0] = maxs[0];maxs[0] = t;}
 641         if (maxs[1] <= mins[1]) {t = mins[1];mins[1] = maxs[1];maxs[1] = t;}
 642         if (maxs[2] <= mins[2]) {t = mins[2];mins[2] = maxs[2];maxs[2] = t;}
 643
 644         center[0] = (mins[0] + maxs[0]) * 0.5f;
 645         center[1] = (mins[1] + maxs[1]) * 0.5f;
 646         center[2] = (mins[2] + maxs[2]) * 0.5f;
 647
 648         while (count--)
 649         {
 650                 k = particlepalette[224 + (rand()&15)];
 651                 o[0] = lhrandom(mins[0], maxs[0]);
 652                 o[1] = lhrandom(mins[1], maxs[1]);
 653                 o[2] = lhrandom(mins[2], maxs[2]);
 654                 VectorSubtract(o, center, v);
 655                 VectorNormalizeFast(v);
 656                 VectorScale(v, 100, v);
 657                 v[2] += sv_gravity.value * 0.15f;
 658                 particle(pt_stardust, PARTICLE_BILLBOARD, 0x903010, 0xFFD030, tex_particle, false, true, 1.5, 1.5, lhrandom(64, 128), 9999, 0, o[0], o[1], o[2], v[0], v[1], v[2], 0, 0, 0, 0, 0, 0);
 659         }
 660 }
 661
 662 void CL_FlameCube (vec3_t mins, vec3_t maxs, int count)
 663 {
 664         int k;
 665         float t;
 666         if (!cl_particles.integer) return;
 667         if (maxs[0] <= mins[0]) {t = mins[0];mins[0] = maxs[0];maxs[0] = t;}
 668         if (maxs[1] <= mins[1]) {t = mins[1];mins[1] = maxs[1];maxs[1] = t;}
 669         if (maxs[2] <= mins[2]) {t = mins[2];mins[2] = maxs[2];maxs[2] = t;}
 670
 671         while (count--)
 672         {
 673                 k = particlepalette[224 + (rand()&15)];
 674                 particle(pt_flame, PARTICLE_BILLBOARD, k, k, tex_particle, false, true, 4, 4, lhrandom(64, 128), 9999, 0, lhrandom(mins[0], maxs[0]), lhrandom(mins[1], maxs[1]), lhrandom(mins[2], maxs[2]), lhrandom(-32, 32), lhrandom(-32, 32), lhrandom(0, 64), 0, 0, 0, 0, 1, 0);
 675                 if (count & 1)
 676                         particle(pt_fade, PARTICLE_BILLBOARD, 0x303030, 0x606060, tex_smoke[rand()&7], false, true, 6, 6, lhrandom(48, 96), 9999, 0, lhrandom(mins[0], maxs[0]), lhrandom(mins[1], maxs[1]), lhrandom(mins[2], maxs[2]), lhrandom(-8, 8), lhrandom(-8, 8), lhrandom(0, 32), 64.0f, 0, 0, 0, 0, 0);
 677         }
 678 }
 679
 680 void CL_Flames (vec3_t org, vec3_t vel, int count)
 681 {
 682         int k;
 683         if (!cl_particles.integer) return;
 684
 685         while (count--)
 686         {
 687                 k = particlepalette[224 + (rand()&15)];
 688                 particle(pt_flame, PARTICLE_BILLBOARD, k, k, tex_particle, false, true, 4, 4, lhrandom(64, 128), 9999, 1.1, org[0], org[1], org[2], vel[0] + lhrandom(-128, 128), vel[1] + lhrandom(-128, 128), vel[2] + lhrandom(-128, 128), 0, 0, 0, 0, 1, 0);
 689         }
 690 }
 691
 692
 693
 694 /*
 695 ===============
 696 CL_LavaSplash
 697
 698 ===============
 699 */
 700 void CL_LavaSplash (vec3_t origin)
 701 {
 702         int                     i, j, k;
 703         float           vel;
 704         vec3_t          dir, org;
 705         if (!cl_particles.integer) return;
 706
 707         for (i=-128 ; i<128 ; i+=16)
 708         {
 709                 for (j=-128 ; j<128 ; j+=16)
 710                 {
 711                         dir[0] = j + lhrandom(0, 8);
 712                         dir[1] = i + lhrandom(0, 8);
 713                         dir[2] = 256;
 714                         org[0] = origin[0] + dir[0];
 715                         org[1] = origin[1] + dir[1];
 716                         org[2] = origin[2] + lhrandom(0, 64);
 717                         vel = lhrandom(50, 120) / VectorLength(dir); // normalize and scale
 718                         k = particlepalette[224 + (rand()&7)];
 719                         particle(pt_lavasplash, PARTICLE_BILLBOARD, k, k, tex_particle, false, true, 7, 7, 255, 9999, 0, org[0], org[1], org[2], dir[0] * vel, dir[1] * vel, dir[2] * vel, 0, 0, 0, 0, 0, 0);
 720                 }
 721         }
 722 }
 723
 724 /*
 725 ===============
 726 CL_TeleportSplash
 727
 728 ===============
 729 */
 730 void CL_TeleportSplash (vec3_t org)
 731 {
 732         int                     i, j, k;
 733         if (!cl_particles.integer) return;
 734
 735         for (i=-16 ; i<16 ; i+=8)
 736                 for (j=-16 ; j<16 ; j+=8)
 737                         for (k=-24 ; k<32 ; k+=8)
 738                                 particle(pt_fade, PARTICLE_BILLBOARD, 0xA0A0A0, 0xFFFFFF, tex_particle, false, true, 10, 10, lhrandom(64, 128), 9999, 0, org[0] + i + lhrandom(0, 8), org[1] + j + lhrandom(0, 8), org[2] + k + lhrandom(0, 8), lhrandom(-64, 64), lhrandom(-64, 64), lhrandom(-256, 256), 256.0f, 0, 0, 0, 1, 0);
 739 }
 740
 741 void CL_RocketTrail (vec3_t start, vec3_t end, int type, entity_t *ent)
 742 {
 743         vec3_t          vec, dir, vel, pos;
 744         float           len, dec, speed;
 745         int                     contents, bubbles;
 746         if (!cl_particles.integer) return;
 747
 748         VectorSubtract(end, start, dir);
 749         VectorNormalize(dir);
 750
 751         VectorSubtract (end, start, vec);
 752         len = VectorNormalizeLength (vec);
 753         dec = -ent->persistent.trail_time;
 754         ent->persistent.trail_time += len;
 755         if (ent->persistent.trail_time < 0.01f)
 756                 return;
 757
 758         speed = 1.0f / (ent->state_current.time - ent->state_previous.time);
 759         VectorSubtract(ent->state_current.origin, ent->state_previous.origin, vel);
 760         VectorScale(vel, speed, vel);
 761
 762         // advance into this frame to reach the first puff location
 763         VectorMA(start, dec, vec, pos);
 764         len -= dec;
 765
 766         // if we skip out, leave it reset
 767         ent->persistent.trail_time = 0.0f;
 768
 769         contents = Mod_PointInLeaf(pos, cl.worldmodel)->contents;
 770         if (contents == CONTENTS_SKY || contents == CONTENTS_LAVA)
 771                 return;
 772
 773         bubbles = (contents == CONTENTS_WATER || contents == CONTENTS_SLIME);
 774
 775         while (len >= 0)
 776         {
 777                 switch (type)
 778                 {
 779                         case 0: // rocket trail
 780                                 if (!cl_particles_smoke.integer)
 781                                         return;
 782                                 dec = 6;
 783                                 particle(pt_fade, PARTICLE_BILLBOARD, 0x303030, 0x606060, tex_smoke[rand()&7], true, false, dec, dec, 64, 9999, 0, pos[0], pos[1], pos[2], lhrandom(-5, 5), lhrandom(-5, 5), lhrandom(-5, 5), 64.0f, 0, 0, 0, 0, 0);
 784                                 if (bubbles && cl_particles_bubbles.integer)
 785                                 {
 786                                         particle(pt_bubble, PARTICLE_BILLBOARD, 0x404040, 0x808080, tex_bubble, false, true, 2, 2, 255, 9999, 1.5, pos[0], pos[1], pos[2], lhrandom(-16, 16), lhrandom(-16, 16), lhrandom(-16, 16), 0, 0, 0, 0, 0, 0);
 787                                 }
 788                                 break;
 789
 790                         case 1: // grenade trail
 791                                 // FIXME: make it gradually stop smoking
 792                                 if (!cl_particles_smoke.integer)
 793                                         return;
 794                                 dec = 6;
 795                                 particle(pt_fade, PARTICLE_BILLBOARD, 0x202020, 0x404040, tex_smoke[rand()&7], true, false, dec, dec, 64, 9999, 0, pos[0], pos[1], pos[2], lhrandom(-5, 5), lhrandom(-5, 5), lhrandom(-5, 5), 128.0f, 0, 0, 0, 0, 0);
 796                                 if (bubbles && cl_particles_bubbles.integer)
 797                                 {
 798                                         particle(pt_bubble, PARTICLE_BILLBOARD, 0x404040, 0x808080, tex_bubble, false, true, 2, 2, 255, 9999, 1.5, pos[0], pos[1], pos[2], lhrandom(-16, 16), lhrandom(-16, 16), lhrandom(-16, 16), 0, 0, 0, 0, 0, 0);
 799                                 }
 800                                 break;
 801
 802
 803                         case 2: // blood
 804                                 if (!cl_particles_blood.integer)
 805                                         return;
 806                                 dec = lhrandom(cl_particles_blood_size_min.value, cl_particles_blood_size_max.value);
 807                                 particle(pt_blood, PARTICLE_BILLBOARD, 0x000000, 0x200000, tex_smoke[rand()&7], true, false, dec, dec, cl_particles_blood_alpha.value * 255.0f, 9999, -1, pos[0], pos[1], pos[2], vel[0] * 0.5f + lhrandom(-64, 64), vel[1] * 0.5f + lhrandom(-64, 64), vel[2] * 0.5f + lhrandom(-64, 64), 0, 0, 0, 0, 1, 0);
 808                                 break;
 809
 810                         case 4: // slight blood
 811                                 if (!cl_particles_blood.integer)
 812                                         return;
 813                                 dec = lhrandom(cl_particles_blood_size_min.value, cl_particles_blood_size_max.value);
 814                                 particle(pt_blood, PARTICLE_BILLBOARD, 0x000000, 0x200000, tex_smoke[rand()&7], true, false, dec, dec, cl_particles_blood_alpha.value * 255.0f, 9999, -1, pos[0], pos[1], pos[2], vel[0] * 0.5f + lhrandom(-64, 64), vel[1] * 0.5f + lhrandom(-64, 64), vel[2] * 0.5f + lhrandom(-64, 64), 0, 0, 0, 0, 1, 0);
 815                                 break;
 816
 817                         case 3: // green tracer
 818                                 dec = 6;
 819                                 particle(pt_fade, PARTICLE_BILLBOARD, 0x373707, 0x373707, tex_particle, false, false, dec, dec, 128, 9999, 0, pos[0], pos[1], pos[2], lhrandom(-8, 8), lhrandom(-8, 8), lhrandom(-8, 8), 384.0f, 0, 0, 0, 0, 0);
 820                                 break;
 821
 822                         case 5: // flame tracer
 823                                 dec = 6;
 824                                 particle(pt_fade, PARTICLE_BILLBOARD, 0xCF632B, 0xCF632B, tex_particle, false, false, dec, dec, 128, 9999, 0, pos[0], pos[1], pos[2], lhrandom(-8, 8), lhrandom(-8, 8), lhrandom(-8, 8), 384.0f, 0, 0, 0, 0, 0);
 825                                 break;
 826
 827                         case 6: // voor trail
 828                                 dec = 6;
 829                                 particle(pt_fade, PARTICLE_BILLBOARD, 0x47232B, 0x47232B, tex_particle, false, false, dec, dec, 128, 9999, 0, pos[0], pos[1], pos[2], lhrandom(-8, 8), lhrandom(-8, 8), lhrandom(-8, 8), 384.0f, 0, 0, 0, 0, 0);
 830                                 break;
 831
 832                         case 7: // Nehahra smoke tracer
 833                                 if (!cl_particles_smoke.integer)
 834                                         return;
 835                                 dec = 10;
 836                                 particle(pt_smoke, PARTICLE_BILLBOARD, 0x202020, 0x404040, tex_smoke[rand()&7], true, false, dec, dec, 64, 9999, 0, pos[0], pos[1], pos[2], 0, 0, 0, 0, 0, 0, 0, 0, 0);
 837                                 break;
 838                 }
 839
 840                 // advance to next time and position
 841                 len -= dec;
 842                 VectorMA (pos, dec, vec, pos);
 843         }
 844         ent->persistent.trail_time = len;
 845 }
 846
 847 void CL_RocketTrail2 (vec3_t start, vec3_t end, int color, entity_t *ent)
 848 {
 849         vec3_t          vec, pos;
 850         int                     len;
 851         if (!cl_particles.integer) return;
 852         if (!cl_particles_smoke.integer) return;
 853
 854         VectorCopy(start, pos);
 855         VectorSubtract (end, start, vec);
 856         len = (int) (VectorNormalizeLength (vec) * (1.0f / 3.0f));
 857         VectorScale(vec, 3, vec);
 858         color = particlepalette[color];
 859         while (len--)
 860         {
 861                 particle(pt_smoke, PARTICLE_BILLBOARD, color, color, tex_particle, false, false, 5, 5, 128, 9999, 0, pos[0], pos[1], pos[2], 0, 0, 0, 0, 0, 0, 0, 0, 0);
 862                 VectorAdd (pos, vec, pos);
 863         }
 864 }
 865
 866
 867 /*
 868 ===============
 869 CL_MoveParticles
 870 ===============
 871 */
 872 void CL_MoveParticles (void)
 873 {
 874         particle_t *p;
 875         int i, activeparticles, maxparticle, j, a, pressureused = false, content;
 876         float gravity, dvel, frametime, f, dist, normal[3], v[3], org[3];
 877
 878         // LordHavoc: early out condition
 879         if (!cl_numparticles)
 880                 return;
 881
 882         frametime = cl.time - cl.oldtime;
 883         if (!frametime)
 884                 return; // if absolutely still, don't update particles
 885         gravity = frametime * sv_gravity.value;
 886         dvel = 1+4*frametime;
 887
 888         activeparticles = 0;
 889         maxparticle = -1;
 890         j = 0;
 891         for (i = 0, p = particles;i < cl_numparticles;i++, p++)
 892         {
 893                 if (p->die < cl.time)
 894                 {
 895                         freeparticles[j++] = p;
 896                         continue;
 897                 }
 898
 899                 content = 0;
 900                 VectorCopy(p->org, p->oldorg);
 901                 VectorMA(p->org, frametime, p->vel, p->org);
 902                 VectorCopy(p->org, org);
 903                 if (p->bounce)
 904                 {
 905                         if (CL_TraceLine(p->oldorg, p->org, v, normal, 0, true) < 1)
 906                         {
 907                                 VectorCopy(v, p->org);
 908                                 if (p->bounce < 0)
 909                                 {
 910                                         // assume it's blood (lame, but...)
 911                                         R_Stain(v, 64, 32, 16, 16, p->alpha * p->scalex * (1.0f / 100.0f), 192, 48, 48, p->alpha * p->scalex * (1.0f / 100.0f));
 912                                         p->die = -1;
 913                                         freeparticles[j++] = p;
 914                                         continue;
 915                                 }
 916                                 else
 917                                 {
 918                                         dist = DotProduct(p->vel, normal) * -p->bounce;
 919                                         VectorMA(p->vel, dist, normal, p->vel);
 920                                         if (DotProduct(p->vel, p->vel) < 0.03)
 921                                                 VectorClear(p->vel);
 922                                 }
 923                         }
 924                 }
 925                 if (p->friction)
 926                 {
 927                         f = p->friction * frametime;
 928                         if (!content)
 929                                 content = Mod_PointInLeaf(p->org, cl.worldmodel)->contents;
 930                         if (content != CONTENTS_EMPTY)
 931                                 f *= 4;
 932                         f = 1.0f - f;
 933                         VectorScale(p->vel, f, p->vel);
 934                 }
 935
 936                 switch (p->type)
 937                 {
 938                 case pt_static:
 939                         break;
 940
 941                         // LordHavoc: drop-through because of shared code
 942                 case pt_blob:
 943                         p->vel[2] *= dvel;
 944                 case pt_blob2:
 945                         p->vel[0] *= dvel;
 946                         p->vel[1] *= dvel;
 947                         p->alpha -= frametime * 256;
 948                         if (p->alpha < 1)
 949                                 p->die = -1;
 950                         break;
 951
 952                 case pt_grav:
 953                         p->vel[2] -= gravity;
 954                         break;
 955                 case pt_lavasplash:
 956                         p->vel[2] -= gravity * 0.05;
 957                         p->alpha -= frametime * 192;
 958                         if (p->alpha < 1)
 959                                 p->die = -1;
 960                         break;
 961                 case pt_snow:
 962                         if (cl.time > p->time2)
 963                         {
 964                                 p->time2 = cl.time + (rand() & 3) * 0.1;
 965                                 p->vel[0] = (rand()&63)-32 + p->vel2[0];
 966                                 p->vel[1] = (rand()&63)-32 + p->vel2[1];
 967                                 p->vel[2] = (rand()&63)-32 + p->vel2[2];
 968                         }
 969                         if (!content)
 970                                 content = Mod_PointInLeaf(p->org, cl.worldmodel)->contents;
 971                         a = content;
 972                         if (a != CONTENTS_EMPTY && a != CONTENTS_SKY)
 973                         {
 974                                 p->die = -1;
 975                         }
 976                         break;
 977                 case pt_blood:
 978                         p->friction = 1;
 979                         if (!content)
 980                                 content = Mod_PointInLeaf(p->org, cl.worldmodel)->contents;
 981                         a = content;
 982                         if (a != CONTENTS_EMPTY)
 983                         {
 984                                 if (a == CONTENTS_WATER || a == CONTENTS_SLIME)
 985                                 {
 986                                         p->scalex += frametime * (cl_particles_blood_size_min.value + cl_particles_blood_size_max.value);
 987                                         p->scaley += frametime * (cl_particles_blood_size_min.value + cl_particles_blood_size_max.value);
 988                                         p->alpha -= frametime * max(cl_particles_blood_alpha.value, 0.01f) * 128.0f;
 989                                         if (p->alpha < 1)
 990                                                 p->die = -1;
 991                                 }
 992                                 else
 993                                         p->die = -1;
 994                         }
 995                         else
 996                                 p->vel[2] -= gravity;
 997                         break;
 998                 case pt_spark:
 999                         p->alpha -= frametime * p->time2;
1000                         p->vel[2] -= gravity;
1001                         if (p->alpha < 1)
1002                                 p->die = -1;
1003                         else
1004                         {
1005                                 if (!content)
1006                                         content = Mod_PointInLeaf(p->org, cl.worldmodel)->contents;
1007                                 if (content != CONTENTS_EMPTY)
1008                                         p->die = -1;
1009                         }
1010                         break;
1011                 case pt_explosionsplash:
1012                         if (Mod_PointInLeaf(p->org, cl.worldmodel)->contents == CONTENTS_EMPTY)
1013                                 p->vel[2] -= gravity;
1014                         else
1015                                 p->alpha = 0;
1016                         p->scalex += frametime * 64.0f;
1017                         p->scaley += frametime * 64.0f;
1018                         p->alpha -= frametime * 1024.0f;
1019                         if (p->alpha < 1)
1020                                 p->die = -1;
1021                         break;
1022                 case pt_fade:
1023                         p->alpha -= frametime * p->time2;
1024                         if (p->alpha < 1)
1025                                 p->die = -1;
1026                         break;
1027                 case pt_bubble:
1028                         if (!content)
1029                                 content = Mod_PointInLeaf(p->org, cl.worldmodel)->contents;
1030                         if (content != CONTENTS_WATER && content != CONTENTS_SLIME)
1031                         {
1032                                 p->die = -1;
1033                                 break;
1034                         }
1035                         p->vel[0] *= (1 - (frametime * 0.0625));
1036                         p->vel[1] *= (1 - (frametime * 0.0625));
1037                         p->vel[2] = (p->vel[2] + gravity * 0.25) * (1 - (frametime * 0.0625));
1038                         if (cl.time > p->time2)
1039                         {
1040                                 p->time2 = cl.time + lhrandom(0, 0.5);
1041                                 p->vel[0] += lhrandom(-32,32);
1042                                 p->vel[1] += lhrandom(-32,32);
1043                                 p->vel[2] += lhrandom(-32,32);
1044                         }
1045                         p->alpha -= frametime * 256;
1046                         if (p->alpha < 1)
1047                                 p->die = -1;
1048                         break;
1049                 case pt_bulletsmoke:
1050                         p->scalex += frametime * 16;
1051                         p->scaley += frametime * 16;
1052                         p->alpha -= frametime * 1024;
1053                         p->vel[2] += gravity * 0.2;
1054                         if (p->alpha < 1)
1055                                 p->die = -1;
1056                         break;
1057                 case pt_smoke:
1058                         p->scalex += frametime * 16;
1059                         p->scaley += frametime * 16;
1060                         p->alpha -= frametime * 320;
1061                         if (p->alpha < 1)
1062                                 p->die = -1;
1063                         break;
1064                 case pt_steam:
1065                         p->scalex += frametime * 48;
1066                         p->scaley += frametime * 48;
1067                         p->alpha -= frametime * 512;
1068                         p->vel[2] += gravity * 0.05;
1069                         if (p->alpha < 1)
1070                                 p->die = -1;
1071                         break;
1072                 case pt_splashpuff:
1073                         p->alpha -= frametime * 1024;
1074                         if (p->alpha < 1)
1075                                 p->die = -1;
1076                         break;
1077                 case pt_rain:
1078                         if (!content)
1079                                 content = Mod_PointInLeaf(p->org, cl.worldmodel)->contents;
1080                         a = content;
1081                         if (a != CONTENTS_EMPTY && a != CONTENTS_SKY)
1082                                 p->die = -1;
1083                         break;
1084                 case pt_flame:
1085                         p->alpha -= frametime * 384;
1086                         p->vel[2] += gravity;
1087                         if (p->alpha < 16)
1088                                 p->die = -1;
1089                         break;
1090                 case pt_oneframe:
1091                         if (p->time2)
1092                                 p->die = -1;
1093                         p->time2 = 1;
1094                         break;
1095                 case pt_stardust:
1096                         p->alpha -= frametime * 128;
1097                         p->vel[2] -= gravity;
1098                         if (p->alpha < 16)
1099                                 p->die = -1;
1100                         break;
1101                 default:
1102                         printf("unknown particle type %i\n", p->type);
1103                         p->die = -1;
1104                         break;
1105                 }
1106
1107                 // LordHavoc: immediate removal of unnecessary particles (must be done to ensure compactor below operates properly in all cases)
1108                 if (p->die < cl.time)
1109                         freeparticles[j++] = p;
1110                 else
1111                 {
1112                         maxparticle = i;
1113                         activeparticles++;
1114                         if (p->pressure)
1115                                 pressureused = true;
1116                 }
1117         }
1118         // fill in gaps to compact the array
1119         i = 0;
1120         while (maxparticle >= activeparticles)
1121         {
1122                 *freeparticles[i++] = particles[maxparticle--];
1123                 while (maxparticle >= activeparticles && particles[maxparticle].die < cl.time)
1124                         maxparticle--;
1125         }
1126         cl_numparticles = activeparticles;
1127
1128         if (pressureused)
1129         {
1130                 activeparticles = 0;
1131                 for (i = 0, p = particles;i < cl_numparticles;i++, p++)
1132                         if (p->pressure)
1133                                 freeparticles[activeparticles++] = p;
1134
1135                 if (activeparticles)
1136                 {
1137                         for (i = 0, p = particles;i < cl_numparticles;i++, p++)
1138                         {
1139                                 for (j = 0;j < activeparticles;j++)
1140                                 {
1141                                         if (freeparticles[j] != p)
1142                                         {
1143                                                 float dist, diff[3];
1144                                                 VectorSubtract(p->org, freeparticles[j]->org, diff);
1145                                                 dist = DotProduct(diff, diff);
1146                                                 if (dist < 4096 && dist >= 1)
1147                                                 {
1148                                                         dist = freeparticles[j]->scalex * 4.0f * frametime / sqrt(dist);
1149                                                         VectorMA(p->vel, dist, diff, p->vel);
1150                                                 }
1151                                         }
1152                                 }
1153                         }
1154                 }
1155         }
1156 }
1157
1158 static rtexturepool_t *particletexturepool;
1159
1160 static rtexture_t *particlefonttexture;
1161 // [0] is normal, [1] is fog, they may be the same
1162 static particletexture_t particletexture[MAX_PARTICLETEXTURES][2];
1163
1164 static cvar_t r_drawparticles = {0, "r_drawparticles", "1"};
1165 static cvar_t r_particles_lighting = {0, "r_particles_lighting", "1"};
1166
1167 static qbyte shadebubble(float dx, float dy, vec3_t light)
1168 {
1169         float   dz, f, dot;
1170         vec3_t  normal;
1171         dz = 1 - (dx*dx+dy*dy);
1172         if (dz > 0) // it does hit the sphere
1173         {
1174                 f = 0;
1175                 // back side
1176                 normal[0] = dx;normal[1] = dy;normal[2] = dz;
1177                 VectorNormalize(normal);
1178                 dot = DotProduct(normal, light);
1179                 if (dot > 0.5) // interior reflection
1180                         f += ((dot *  2) - 1);
1181                 else if (dot < -0.5) // exterior reflection
1182                         f += ((dot * -2) - 1);
1183                 // front side
1184                 normal[0] = dx;normal[1] = dy;normal[2] = -dz;
1185                 VectorNormalize(normal);
1186                 dot = DotProduct(normal, light);
1187                 if (dot > 0.5) // interior reflection
1188                         f += ((dot *  2) - 1);
1189                 else if (dot < -0.5) // exterior reflection
1190                         f += ((dot * -2) - 1);
1191                 f *= 128;
1192                 f += 16; // just to give it a haze so you can see the outline
1193                 f = bound(0, f, 255);
1194                 return (qbyte) f;
1195         }
1196         else
1197                 return 0;
1198 }
1199
1200 static void setuptex(int cltexnum, int fog, int rtexnum, qbyte *data, qbyte *particletexturedata)
1201 {
1202         int basex, basey, y;
1203         basex = ((rtexnum >> 0) & 7) * 32;
1204         basey = ((rtexnum >> 3) & 7) * 32;
1205         particletexture[cltexnum][fog].s1 = (basex + 1) / 256.0f;
1206         particletexture[cltexnum][fog].t1 = (basey + 1) / 256.0f;
1207         particletexture[cltexnum][fog].s2 = (basex + 31) / 256.0f;
1208         particletexture[cltexnum][fog].t2 = (basey + 31) / 256.0f;
1209         for (y = 0;y < 32;y++)
1210                 memcpy(particletexturedata + ((basey + y) * 256 + basex) * 4, data + y * 32 * 4, 32 * 4);
1211 }
1212
1213 static void R_InitParticleTexture (void)
1214 {
1215         int             x,y,d,i,m;
1216         float   dx, dy, radius, f, f2;
1217         qbyte   data[32][32][4], noise1[64][64], noise2[64][64];
1218         vec3_t  light;
1219         qbyte   particletexturedata[256*256*4];
1220
1221         memset(particletexturedata, 255, sizeof(particletexturedata));
1222
1223         // the particletexture[][] array numbers must match the cl_part.c textures
1224         // smoke/blood
1225         for (i = 0;i < 8;i++)
1226         {
1227                 do
1228                 {
1229                         fractalnoise(&noise1[0][0], 64, 4);
1230                         fractalnoise(&noise2[0][0], 64, 8);
1231                         m = 0;
1232                         for (y = 0;y < 32;y++)
1233                         {
1234                                 dy = y - 16;
1235                                 for (x = 0;x < 32;x++)
1236                                 {
1237                                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
1238                                         dx = x - 16;
1239                                         d = (noise2[y][x] - 128) * 3 + 192;
1240                                         if (d > 0)
1241                                                 d = (d * (256 - (int) (dx*dx+dy*dy))) >> 8;
1242                                         d = (d * noise1[y][x]) >> 7;
1243                                         d = bound(0, d, 255);
1244                                         data[y][x][3] = (qbyte) d;
1245                                         if (m < d)
1246                                                 m = d;
1247                                 }
1248                         }
1249                 }
1250                 while (m < 224);
1251
1252                 setuptex(i + 0, 0, i + 0, &data[0][0][0], particletexturedata);
1253                 setuptex(i + 0, 1, i + 0, &data[0][0][0], particletexturedata);
1254         }
1255
1256         // rain splash
1257         for (i = 0;i < 16;i++)
1258         {
1259                 radius = i * 3.0f / 16.0f;
1260                 f2 = 255.0f * ((15.0f - i) / 15.0f);
1261                 for (y = 0;y < 32;y++)
1262                 {
1263                         dy = (y - 16) * 0.25f;
1264                         for (x = 0;x < 32;x++)
1265                         {
1266                                 dx = (x - 16) * 0.25f;
1267                                 data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
1268                                 f = (1.0 - fabs(radius - sqrt(dx*dx+dy*dy))) * f2;
1269                                 f = bound(0.0f, f, 255.0f);
1270                                 data[y][x][3] = (int) f;
1271                         }
1272                 }
1273                 setuptex(i + 8, 0, i + 16, &data[0][0][0], particletexturedata);
1274                 setuptex(i + 8, 1, i + 16, &data[0][0][0], particletexturedata);
1275         }
1276
1277         // normal particle
1278         for (y = 0;y < 32;y++)
1279         {
1280                 dy = y - 16;
1281                 for (x = 0;x < 32;x++)
1282                 {
1283                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
1284                         dx = x - 16;
1285                         d = (256 - (dx*dx+dy*dy));
1286                         d = bound(0, d, 255);
1287                         data[y][x][3] = (qbyte) d;
1288                 }
1289         }
1290         setuptex(24, 0, 32, &data[0][0][0], particletexturedata);
1291         setuptex(24, 1, 32, &data[0][0][0], particletexturedata);
1292
1293         // rain
1294         light[0] = 1;light[1] = 1;light[2] = 1;
1295         VectorNormalize(light);
1296         for (y = 0;y < 32;y++)
1297         {
1298                 for (x = 0;x < 32;x++)
1299                 {
1300                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
1301                         data[y][x][3] = shadebubble((x - 16) * (1.0 / 8.0), y < 24 ? (y - 24) * (1.0 / 24.0) : (y - 24) * (1.0 / 8.0), light);
1302                 }
1303         }
1304         setuptex(25, 0, 33, &data[0][0][0], particletexturedata);
1305         setuptex(25, 1, 33, &data[0][0][0], particletexturedata);
1306
1307         // bubble
1308         light[0] = 1;light[1] = 1;light[2] = 1;
1309         VectorNormalize(light);
1310         for (y = 0;y < 32;y++)
1311         {
1312                 for (x = 0;x < 32;x++)
1313                 {
1314                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
1315                         data[y][x][3] = shadebubble((x - 16) * (1.0 / 16.0), (y - 16) * (1.0 / 16.0), light);
1316                 }
1317         }
1318         setuptex(26, 0, 34, &data[0][0][0], particletexturedata);
1319         setuptex(26, 1, 34, &data[0][0][0], particletexturedata);
1320
1321         particlefonttexture = R_LoadTexture (particletexturepool, "particlefont", 256, 256, particletexturedata, TEXTYPE_RGBA, TEXF_ALPHA | TEXF_PRECACHE);
1322 }
1323
1324 static void r_part_start(void)
1325 {
1326         particletexturepool = R_AllocTexturePool();
1327         R_InitParticleTexture ();
1328 }
1329
1330 static void r_part_shutdown(void)
1331 {
1332         R_FreeTexturePool(&particletexturepool);
1333 }
1334
1335 static void r_part_newmap(void)
1336 {
1337 }
1338
1339 void R_Particles_Init (void)
1340 {
1341         Cvar_RegisterVariable(&r_drawparticles);
1342         Cvar_RegisterVariable(&r_particles_lighting);
1343         R_RegisterModule("R_Particles", r_part_start, r_part_shutdown, r_part_newmap);
1344 }
1345
1346 int partindexarray[6] = {0, 1, 2, 0, 2, 3};
1347
1348 void R_DrawParticles (void)
1349 {
1350         int i, lighting, dynlight, additive, texnum, orientation;
1351         float minparticledist, org[3], uprightangles[3], up2[3], right2[3], v[3], right[3], up[3], tvxyz[4][4], tvst[4][2], fog, ifog, fogvec[3];
1352         mleaf_t *leaf;
1353         particletexture_t *tex, *texfog;
1354         rmeshinfo_t m;
1355         particle_t *p;
1356
1357         // LordHavoc: early out conditions
1358         if ((!cl_numparticles) || (!r_drawparticles.integer))
1359                 return;
1360
1361         lighting = r_particles_lighting.integer;
1362         if (!r_dynamic.integer)
1363                 lighting = 0;
1364
1365         c_particles += cl_numparticles;
1366
1367         uprightangles[0] = 0;
1368         uprightangles[1] = r_refdef.viewangles[1];
1369         uprightangles[2] = 0;
1370         AngleVectors (uprightangles, NULL, right2, up2);
1371
1372         minparticledist = DotProduct(r_origin, vpn) + 16.0f;
1373
1374         // LordHavoc: this meshinfo must match up with R_Mesh_DrawDecal
1375         // LordHavoc: the commented out lines are hardwired behavior in R_Mesh_DrawDecal
1376         memset(&m, 0, sizeof(m));
1377         m.transparent = true;
1378         m.blendfunc1 = GL_SRC_ALPHA;
1379         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1380         m.numtriangles = 2;
1381         m.index = partindexarray;
1382         m.numverts = 4;
1383         m.vertex = &tvxyz[0][0];
1384         m.vertexstep = sizeof(float[4]);
1385         m.tex[0] = R_GetTexture(particlefonttexture);
1386         m.texcoords[0] = &tvst[0][0];
1387         m.texcoordstep[0] = sizeof(float[2]);
1388
1389         for (i = 0, p = particles;i < cl_numparticles;i++, p++)
1390         {
1391                 // LordHavoc: only render if not too close
1392                 if (DotProduct(p->org, vpn) < minparticledist)
1393                         continue;
1394
1395                 // LordHavoc: check if it's in a visible leaf
1396                 leaf = Mod_PointInLeaf(p->org, cl.worldmodel);
1397                 if (leaf->visframe != r_framecount)
1398                         continue;
1399
1400                 VectorCopy(p->org, org);
1401                 orientation = (p->flags >> P_ORIENTATION_FIRSTBIT) & ((1 << P_ORIENTATION_BITS) - 1);
1402                 texnum = (p->flags >> P_TEXNUM_FIRSTBIT) & ((1 << P_TEXNUM_BITS) - 1);
1403                 dynlight = p->flags & P_DYNLIGHT;
1404                 additive = p->flags & P_ADDITIVE;
1405                 if (orientation == PARTICLE_BILLBOARD)
1406                 {
1407                         VectorScale(vright, p->scalex, right);
1408                         VectorScale(vup, p->scaley, up);
1409                 }
1410                 else if (orientation == PARTICLE_UPRIGHT_FACING)
1411                 {
1412                         VectorScale(right2, p->scalex, right);
1413                         VectorScale(up2, p->scaley, up);
1414                 }
1415                 else if (orientation == PARTICLE_ORIENTED_DOUBLESIDED)
1416                 {
1417                         // double-sided
1418                         if (DotProduct(p->vel2, r_origin) > DotProduct(p->vel2, org))
1419                         {
1420                                 VectorNegate(p->vel2, v);
1421                                 VectorVectors(v, right, up);
1422                         }
1423                         else
1424                                 VectorVectors(p->vel2, right, up);
1425                         VectorScale(right, p->scalex, right);
1426                         VectorScale(up, p->scaley, up);
1427                 }
1428                 else
1429                         Host_Error("R_DrawParticles: unknown particle orientation %i\n", orientation);
1430
1431                 m.cr = p->color[0] * (1.0f / 255.0f);
1432                 m.cg = p->color[1] * (1.0f / 255.0f);
1433                 m.cb = p->color[2] * (1.0f / 255.0f);
1434                 m.ca = p->alpha * (1.0f / 255.0f);
1435                 if (lighting >= 1 && (dynlight || lighting >= 2))
1436                 {
1437                         R_CompleteLightPoint(v, org, true, leaf);
1438                         m.cr *= v[0];
1439                         m.cg *= v[1];
1440                         m.cb *= v[2];
1441                 }
1442
1443                 tex = &particletexture[texnum][0];
1444
1445                 tvxyz[0][0] = org[0] - right[0] - up[0];
1446                 tvxyz[0][1] = org[1] - right[1] - up[1];
1447                 tvxyz[0][2] = org[2] - right[2] - up[2];
1448                 tvxyz[1][0] = org[0] - right[0] + up[0];
1449                 tvxyz[1][1] = org[1] - right[1] + up[1];
1450                 tvxyz[1][2] = org[2] - right[2] + up[2];
1451                 tvxyz[2][0] = org[0] + right[0] + up[0];
1452                 tvxyz[2][1] = org[1] + right[1] + up[1];
1453                 tvxyz[2][2] = org[2] + right[2] + up[2];
1454                 tvxyz[3][0] = org[0] + right[0] - up[0];
1455                 tvxyz[3][1] = org[1] + right[1] - up[1];
1456                 tvxyz[3][2] = org[2] + right[2] - up[2];
1457                 tvst[0][0] = tex->s1;
1458                 tvst[0][1] = tex->t1;
1459                 tvst[1][0] = tex->s1;
1460                 tvst[1][1] = tex->t2;
1461                 tvst[2][0] = tex->s2;
1462                 tvst[2][1] = tex->t2;
1463                 tvst[3][0] = tex->s2;
1464                 tvst[3][1] = tex->t1;
1465
1466                 if (additive)
1467                 {
1468                         m.blendfunc2 = GL_ONE;
1469                         fog = 0;
1470                         if (fogenabled)
1471                         {
1472                                 texfog = &particletexture[texnum][1];
1473                                 VectorSubtract(org, r_origin, fogvec);
1474                                 ifog = 1 - exp(fogdensity/DotProduct(fogvec,fogvec));
1475                                 if (ifog < (1.0f - (1.0f / 64.0f)))
1476                                 {
1477                                         if (ifog >= (1.0f / 64.0f))
1478                                         {
1479                                                 // partially fogged, darken it
1480                                                 m.cr *= ifog;
1481                                                 m.cg *= ifog;
1482                                                 m.cb *= ifog;
1483                                                 R_Mesh_Draw(&m);
1484                                         }
1485                                 }
1486                                 else
1487                                         R_Mesh_Draw(&m);
1488                         }
1489                         else
1490                                 R_Mesh_Draw(&m);
1491                 }
1492                 else
1493                 {
1494                         m.blendfunc2 = GL_ONE_MINUS_SRC_ALPHA;
1495                         fog = 0;
1496                         if (fogenabled)
1497                         {
1498                                 texfog = &particletexture[texnum][1];
1499                                 VectorSubtract(org, r_origin, fogvec);
1500                                 fog = exp(fogdensity/DotProduct(fogvec,fogvec));
1501                                 if (fog >= (1.0f / 64.0f))
1502                                 {
1503                                         if (fog >= (1.0f - (1.0f / 64.0f)))
1504                                         {
1505                                                 // fully fogged, just use the fog texture and render as alpha
1506                                                 m.cr = fogcolor[0];
1507                                                 m.cg = fogcolor[1];
1508                                                 m.cb = fogcolor[2];
1509                                                 tvst[0][0] = texfog->s1;
1510                                                 tvst[0][1] = texfog->t1;
1511                                                 tvst[1][0] = texfog->s1;
1512                                                 tvst[1][1] = texfog->t2;
1513                                                 tvst[2][0] = texfog->s2;
1514                                                 tvst[2][1] = texfog->t2;
1515                                                 tvst[3][0] = texfog->s2;
1516                                                 tvst[3][1] = texfog->t1;
1517                                                 R_Mesh_Draw(&m);
1518                                         }
1519                                         else
1520                                         {
1521                                                 // partially fogged, darken the first pass
1522                                                 ifog = 1 - fog;
1523                                                 m.cr *= ifog;
1524                                                 m.cg *= ifog;
1525                                                 m.cb *= ifog;
1526                                                 if (tex->s1 == texfog->s1 && tex->t1 == texfog->t1)
1527                                                 {
1528                                                         // fog texture is the same as the base, just change the color
1529                                                         m.cr += fogcolor[0] * fog;
1530                                                         m.cg += fogcolor[1] * fog;
1531                                                         m.cb += fogcolor[2] * fog;
1532                                                         R_Mesh_Draw(&m);
1533                                                 }
1534                                                 else
1535                                                 {
1536                                                         // render the first pass (alpha), then do additive fog
1537                                                         R_Mesh_Draw(&m);
1538
1539                                                         m.blendfunc2 = GL_ONE;
1540                                                         m.cr = fogcolor[0] * fog;
1541                                                         m.cg = fogcolor[1] * fog;
1542                                                         m.cb = fogcolor[2] * fog;
1543                                                         tvst[0][0] = texfog->s1;
1544                                                         tvst[0][1] = texfog->t1;
1545                                                         tvst[1][0] = texfog->s1;
1546                                                         tvst[1][1] = texfog->t2;
1547                                                         tvst[2][0] = texfog->s2;
1548                                                         tvst[2][1] = texfog->t2;
1549                                                         tvst[3][0] = texfog->s2;
1550                                                         tvst[3][1] = texfog->t1;
1551                                                         R_Mesh_Draw(&m);
1552                                                 }
1553                                         }
1554                                 }
1555                                 else
1556                                         R_Mesh_Draw(&m);
1557                         }
1558                         else
1559                                 R_Mesh_Draw(&m);
1560                 }
1561         }
1562 }
1563