r_part.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
  23 #define MAX_PARTICLES                   4096    // default max # of particles at one time
  24 #define ABSOLUTE_MIN_PARTICLES  512             // no fewer than this no matter what's on the command line
  25
  26 // LordHavoc: added dust, smoke, snow, bloodcloud, and many others
  27 typedef enum {
  28         pt_static, pt_grav, pt_blob, pt_blob2, pt_smoke, pt_snow, pt_bloodcloud, pt_fallfadespark, pt_bubble, pt_fade, pt_smokecloud
  29 } ptype_t;
  30
  31 typedef struct particle_s
  32 {
  33         vec3_t          org;
  34         float           color;
  35         vec3_t          vel;
  36         float           die;
  37         ptype_t         type;
  38         // LordHavoc: added for improved particle effects
  39         float           scale;
  40         short           texnum;
  41         float           alpha; // 0-255
  42         float           time2; // used for various things (snow fluttering, for example)
  43         vec3_t          vel2; // used for snow fluttering (base velocity, wind for instance)
  44 } particle_t;
  45
  46 int             ramp1[8] = {0x6f, 0x6d, 0x6b, 0x69, 0x67, 0x65, 0x63, 0x61};
  47 int             ramp2[8] = {0x6f, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x68, 0x66};
  48 int             ramp3[8] = {0x6d, 0x6b, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01};
  49
  50 int             particletexture;
  51 int             smokeparticletexture[8];
  52 int             rainparticletexture;
  53 int             bubbleparticletexture;
  54
  55 particle_t      *particles;
  56 int                     r_numparticles;
  57
  58 vec3_t                  r_pright, r_pup, r_ppn;
  59
  60 int                     numparticles;
  61 particle_t      **freeparticles; // list used only in compacting particles array
  62
  63 // LordHavoc: reduced duplicate code, and allow particle allocation system independence
  64 #define ALLOCPARTICLE \
  65         if (numparticles >= r_numparticles)\
  66                 return;\
  67         p = &particles[numparticles++];
  68
  69 cvar_t r_particles = {"r_particles", "1"};
  70 cvar_t r_dynamicparticles = {"r_dynamicparticles", "0", TRUE};
  71
  72 void R_InitParticleTexture (void)
  73 {
  74         int             x,y,d,i;
  75         float   dx, dy, dz, f, dot;
  76         byte    data[32][32][4], noise1[32][32], noise2[32][32];
  77         vec3_t  normal, light;
  78
  79         for (x=0 ; x<32 ; x++)
  80         {
  81                 for (y=0 ; y<32 ; y++)
  82                 {
  83                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
  84                         dx = x - 16;
  85                         dy = y - 16;
  86                         d = (255 - (dx*dx+dy*dy));
  87                         if (d < 0) d = 0;
  88                         data[y][x][3] = (byte) d;
  89                 }
  90         }
  91         particletexture = GL_LoadTexture ("particletexture", 32, 32, &data[0][0][0], true, true, 4);
  92
  93         for (i = 0;i < 8;i++)
  94         {
  95                 fractalnoise(&noise1[0][0], 32);
  96                 fractalnoise(&noise2[0][0], 32);
  97                 for (y = 0;y < 32;y++)
  98                         for (x = 0;x < 32;x++)
  99                         {
 100                                 data[y][x][0] = data[y][x][1] = data[y][x][2] = (noise1[y][x] >> 1) + 128;
 101                                 dx = x - 16;
 102                                 dy = y - 16;
 103                                 d = noise2[y][x] * 4 - 512;
 104                                 if (d > 0)
 105                                 {
 106                                         if (d > 255)
 107                                                 d = 255;
 108                                         d = (d * (255 - (int) (dx*dx+dy*dy))) >> 8;
 109                                         if (d < 0) d = 0;
 110                                         if (d > 255) d = 255;
 111                                         data[y][x][3] = (byte) d;
 112                                 }
 113                                 else
 114                                         data[y][x][3] = 0;
 115                         }
 116
 117                 smokeparticletexture[i] = GL_LoadTexture (va("smokeparticletexture%d", i), 32, 32, &data[0][0][0], true, true, 4);
 118         }
 119
 120         for (x=0 ; x<32 ; x++)
 121         {
 122                 for (y=0 ; y<32 ; y++)
 123                 {
 124                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
 125                         if (y < 24) // stretch the upper half to make a raindrop
 126                         {
 127                                 dx = (x - 16)*2;
 128                                 dy = (y - 24)*2/3;
 129                                 d = (255 - (dx*dx+dy*dy))/2;
 130                         }
 131                         else
 132                         {
 133                                 dx = (x - 16)*2;
 134                                 dy = (y - 24)*2;
 135                                 d = (255 - (dx*dx+dy*dy))/2;
 136                         }
 137                         if (d < 0) d = 0;
 138                         data[y][x][3] = (byte) d;
 139                 }
 140         }
 141         rainparticletexture = GL_LoadTexture ("rainparticletexture", 32, 32, &data[0][0][0], true, true, 4);
 142
 143         light[0] = 1;light[1] = 1;light[2] = 1;
 144         VectorNormalize(light);
 145         for (x=0 ; x<32 ; x++)
 146         {
 147                 for (y=0 ; y<32 ; y++)
 148                 {
 149                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
 150                         dx = x * (1.0 / 16.0) - 1.0;
 151                         dy = y * (1.0 / 16.0) - 1.0;
 152                         if (dx*dx+dy*dy < 1) // it does hit the sphere
 153                         {
 154                                 dz = 1 - (dx*dx+dy*dy);
 155                                 f = 0;
 156                                 // back side
 157                                 normal[0] = dx;normal[1] = dy;normal[2] = dz;
 158                                 VectorNormalize(normal);
 159                                 dot = DotProduct(normal, light);
 160                                 if (dot > 0.5) // interior reflection
 161                                         f += ((dot *  2) - 1);
 162                                 else if (dot < -0.5) // exterior reflection
 163                                         f += ((dot * -2) - 1);
 164                                 // front side
 165                                 normal[0] = dx;normal[1] = dy;normal[2] = -dz;
 166                                 VectorNormalize(normal);
 167                                 dot = DotProduct(normal, light);
 168                                 if (dot > 0.5) // interior reflection
 169                                         f += ((dot *  2) - 1);
 170                                 else if (dot < -0.5) // exterior reflection
 171                                         f += ((dot * -2) - 1);
 172                                 f *= 64;
 173                                 f = bound(0, f, 255);
 174                                 data[y][x][3] = (byte) f;
 175                         }
 176                         else
 177                                 data[y][x][3] = 0;
 178                 }
 179         }
 180         bubbleparticletexture = GL_LoadTexture ("bubbleparticletexture", 32, 32, &data[0][0][0], true, true, 4);
 181 }
 182
 183 void r_part_start()
 184 {
 185         particles = (particle_t *) malloc (r_numparticles * sizeof(particle_t));
 186         freeparticles = (void *) malloc (r_numparticles * sizeof(particle_t *));
 187         R_InitParticleTexture ();
 188 }
 189
 190 void r_part_shutdown()
 191 {
 192         free(particles);
 193         free(freeparticles);
 194 }
 195
 196 /*
 197 ===============
 198 R_InitParticles
 199 ===============
 200 */
 201 void R_Particles_Init (void)
 202 {
 203         int             i;
 204
 205         i = COM_CheckParm ("-particles");
 206
 207         if (i)
 208         {
 209                 r_numparticles = (int)(atoi(com_argv[i+1]));
 210                 if (r_numparticles < ABSOLUTE_MIN_PARTICLES)
 211                         r_numparticles = ABSOLUTE_MIN_PARTICLES;
 212         }
 213         else
 214         {
 215                 r_numparticles = MAX_PARTICLES;
 216         }
 217
 218         Cvar_RegisterVariable (&r_particles);
 219         Cvar_RegisterVariable (&r_dynamicparticles);
 220
 221         R_RegisterModule("R_Particles", r_part_start, r_part_shutdown);
 222 }
 223
 224 #define particle(ptype, pcolor, ptex, pscale, palpha, ptime, px, py, pz, pvx, pvy, pvz)\
 225 {\
 226         particle_t      *p;\
 227         ALLOCPARTICLE\
 228         p->type = (ptype);\
 229         p->color = (pcolor);\
 230         p->texnum = (ptex);\
 231         p->scale = (pscale);\
 232         p->alpha = (palpha);\
 233         p->die = cl.time + (ptime);\
 234         p->org[0] = (px);\
 235         p->org[1] = (py);\
 236         p->org[2] = (pz);\
 237         p->vel[0] = (pvx);\
 238         p->vel[1] = (pvy);\
 239         p->vel[2] = (pvz);\
 240 }
 241 #define particle2(ptype, pcolor, ptex, pscale, palpha, ptime, pbase, poscale, pvscale)\
 242 {\
 243         particle_t      *p;\
 244         ALLOCPARTICLE\
 245         p->type = (ptype);\
 246         p->color = (pcolor);\
 247         p->texnum = (ptex);\
 248         p->scale = (pscale);\
 249         p->alpha = (palpha);\
 250         p->die = cl.time + (ptime);\
 251         p->org[0] = lhrandom(-(poscale), (poscale)) + (pbase)[0];\
 252         p->org[1] = lhrandom(-(poscale), (poscale)) + (pbase)[1];\
 253         p->org[2] = lhrandom(-(poscale), (poscale)) + (pbase)[2];\
 254         p->vel[0] = lhrandom(-(pvscale), (pvscale));\
 255         p->vel[1] = lhrandom(-(pvscale), (pvscale));\
 256         p->vel[2] = lhrandom(-(pvscale), (pvscale));\
 257 }
 258 #define particle3(ptype, pcolor, ptex, pscale, palpha, ptime, pbase, pscalex, pscaley, pscalez, pvscalex, pvscaley, pvscalez)\
 259 {\
 260         particle_t      *p;\
 261         ALLOCPARTICLE\
 262         p->type = (ptype);\
 263         p->color = (pcolor);\
 264         p->texnum = (ptex);\
 265         p->scale = (pscale);\
 266         p->alpha = (palpha);\
 267         p->die = cl.time + (ptime);\
 268         p->org[0] = lhrandom(-(pscalex), (pscalex)) + (pbase)[0];\
 269         p->org[1] = lhrandom(-(pscaley), (pscaley)) + (pbase)[1];\
 270         p->org[2] = lhrandom(-(pscalez), (pscalez)) + (pbase)[2];\
 271         p->vel[0] = lhrandom(-(pvscalex), (pvscalex));\
 272         p->vel[1] = lhrandom(-(pvscaley), (pvscaley));\
 273         p->vel[2] = lhrandom(-(pvscalez), (pvscalez));\
 274 }
 275 /*
 276 void particle(int type, int color, int tex, float scale, int alpha, float time, float x, float y, float z, float vx, float vy, float vz)
 277 {
 278         particle_t      *p;
 279         ALLOCPARTICLE
 280
 281         p->type = type;
 282         p->color = color;
 283         p->texnum = tex;
 284         p->scale = scale;
 285         p->alpha = alpha;
 286         p->die = cl.time + time;
 287         p->org[0] = x;
 288         p->org[1] = y;
 289         p->org[2] = z;
 290         p->vel[0] = vx;
 291         p->vel[1] = vy;
 292         p->vel[2] = vz;
 293 }
 294 void particle2(int type, int color, int tex, float scale, int alpha, float time, vec3_t base, float oscale, float vscale)
 295 {
 296         particle_t      *p;
 297         ALLOCPARTICLE
 298
 299         p->type = type;
 300         p->color = color;
 301         p->texnum = tex;
 302         p->scale = scale;
 303         p->alpha = alpha;
 304         p->die = cl.time + time;
 305         p->org[0] = lhrandom(-oscale, oscale) + base[0];
 306         p->org[1] = lhrandom(-oscale, oscale) + base[1];
 307         p->org[2] = lhrandom(-oscale, oscale) + base[2];
 308         p->vel[0] = lhrandom(-vscale, vscale);
 309         p->vel[1] = lhrandom(-vscale, vscale);
 310         p->vel[2] = lhrandom(-vscale, vscale);
 311 }
 312 void particle3(int type, int color, int tex, float scale, int alpha, float time, vec3_t base, float scalex, float scaley, float scalez, float vscalex, float vscaley, float vscalez)
 313 {
 314         particle_t      *p;
 315         ALLOCPARTICLE
 316
 317         p->type = type;
 318         p->color = color;
 319         p->texnum = tex;
 320         p->scale = scale;
 321         p->alpha = alpha;
 322         p->die = cl.time + time;
 323         p->org[0] = lhrandom(-scalex, scalex) + base[0];
 324         p->org[1] = lhrandom(-scaley, scaley) + base[1];
 325         p->org[2] = lhrandom(-scalez, scalez) + base[2];
 326         p->vel[0] = lhrandom(-vscalex, vscalex);
 327         p->vel[1] = lhrandom(-vscaley, vscaley);
 328         p->vel[2] = lhrandom(-vscalez, vscalez);
 329 }
 330 */
 331
 332 /*
 333 ===============
 334 R_EntityParticles
 335 ===============
 336 */
 337
 338 #define NUMVERTEXNORMALS        162
 339 extern  float   r_avertexnormals[NUMVERTEXNORMALS][3];
 340 vec3_t  avelocities[NUMVERTEXNORMALS];
 341 float   beamlength = 16;
 342 vec3_t  avelocity = {23, 7, 3};
 343 float   partstep = 0.01;
 344 float   timescale = 0.01;
 345
 346 void R_EntityParticles (entity_t *ent)
 347 {
 348         int                     count;
 349         int                     i;
 350         float           angle;
 351         float           sp, sy, cp, cy;
 352         vec3_t          forward;
 353         float           dist;
 354         if (!r_particles.value) return; // LordHavoc: particles are optional
 355
 356         dist = 64;
 357         count = 50;
 358
 359         if (!avelocities[0][0])
 360                 for (i=0 ; i<NUMVERTEXNORMALS*3 ; i++)
 361                         avelocities[0][i] = (rand()&255) * 0.01;
 362
 363         for (i=0 ; i<NUMVERTEXNORMALS ; i++)
 364         {
 365                 angle = cl.time * avelocities[i][0];
 366                 sy = sin(angle);
 367                 cy = cos(angle);
 368                 angle = cl.time * avelocities[i][1];
 369                 sp = sin(angle);
 370                 cp = cos(angle);
 371
 372                 forward[0] = cp*cy;
 373                 forward[1] = cp*sy;
 374                 forward[2] = -sp;
 375
 376                 particle(pt_static, 0x6f, particletexture, 2, 255, 0, ent->origin[0] + r_avertexnormals[i][0]*dist + forward[0]*beamlength, ent->origin[1] + r_avertexnormals[i][1]*dist + forward[1]*beamlength, ent->origin[2] + r_avertexnormals[i][2]*dist + forward[2]*beamlength, 0, 0, 0);
 377         }
 378 }
 379
 380
 381 /*
 382 ===============
 383 R_ClearParticles
 384 ===============
 385 */
 386 void R_ClearParticles (void)
 387 {
 388 //      int             i;
 389 //      free_particles = &particles[0];
 390 //      active_particles = NULL;
 391
 392 //      for (i=0 ;i<r_numparticles ; i++)
 393 //              particles[i].next = &particles[i+1];
 394 //      particles[r_numparticles-1].next = NULL;
 395
 396         numparticles = 0;
 397 }
 398
 399
 400 void R_ReadPointFile_f (void)
 401 {
 402         FILE    *f;
 403         vec3_t  org;
 404         int             r;
 405         int             c;
 406         char    name[MAX_OSPATH];
 407
 408         sprintf (name,"maps/%s.pts", sv.name);
 409
 410         COM_FOpenFile (name, &f, false);
 411         if (!f)
 412         {
 413                 Con_Printf ("couldn't open %s\n", name);
 414                 return;
 415         }
 416
 417         Con_Printf ("Reading %s...\n", name);
 418         c = 0;
 419         for (;;)
 420         {
 421                 r = fscanf (f,"%f %f %f\n", &org[0], &org[1], &org[2]);
 422                 if (r != 3)
 423                         break;
 424                 c++;
 425
 426                 if (numparticles >= r_numparticles)
 427                 {
 428                         Con_Printf ("Not enough free particles\n");
 429                         break;
 430                 }
 431                 particle(pt_static, (-c)&15, particletexture, 2, 255, 99999, org[0], org[1], org[2], 0, 0, 0);
 432         }
 433
 434         fclose (f);
 435         Con_Printf ("%i points read\n", c);
 436 }
 437
 438 /*
 439 ===============
 440 R_ParseParticleEffect
 441
 442 Parse an effect out of the server message
 443 ===============
 444 */
 445 void R_ParseParticleEffect (void)
 446 {
 447         vec3_t          org, dir;
 448         int                     i, count, msgcount, color;
 449
 450         for (i=0 ; i<3 ; i++)
 451                 org[i] = MSG_ReadCoord ();
 452         for (i=0 ; i<3 ; i++)
 453                 dir[i] = MSG_ReadChar () * (1.0/16);
 454         msgcount = MSG_ReadByte ();
 455         color = MSG_ReadByte ();
 456
 457 if (msgcount == 255)
 458         count = 1024;
 459 else
 460         count = msgcount;
 461
 462         R_RunParticleEffect (org, dir, color, count);
 463 }
 464
 465 /*
 466 ===============
 467 R_ParticleExplosion
 468
 469 ===============
 470 */
 471 void R_ParticleExplosion (vec3_t org, int smoke)
 472 {
 473         int                     i;
 474         if (!r_particles.value) return; // LordHavoc: particles are optional
 475
 476         particle(pt_smokecloud, (rand()&7) + 8, smokeparticletexture[rand()&7], 30, 96, 2, org[0], org[1], org[2], 0, 0, 0);
 477
 478         i = Mod_PointInLeaf(org, cl.worldmodel)->contents;
 479         if (i == CONTENTS_SLIME || i == CONTENTS_WATER)
 480                 for (i=0 ; i<32 ; i++)
 481                         particle2(pt_bubble, (rand()&3) + 12, bubbleparticletexture, lhrandom(1, 2), 255, 2, org, 16, 16);
 482 }
 483
 484 /*
 485 ===============
 486 R_ParticleExplosion2
 487
 488 ===============
 489 */
 490 void R_ParticleExplosion2 (vec3_t org, int colorStart, int colorLength)
 491 {
 492         int                     i;
 493         if (!r_particles.value) return; // LordHavoc: particles are optional
 494
 495         for (i = 0;i < 512;i++)
 496                 particle2(pt_fade, colorStart + (i % colorLength), particletexture, 1.5, 255, 0.3, org, 8, 192);
 497 }
 498
 499 /*
 500 ===============
 501 R_BlobExplosion
 502
 503 ===============
 504 */
 505 void R_BlobExplosion (vec3_t org)
 506 {
 507         int                     i;
 508         if (!r_particles.value) return; // LordHavoc: particles are optional
 509
 510         for (i=0 ; i<512 ; i++)
 511                 particle3(pt_blob, 66+(rand()%6), particletexture, 2, 255, lhrandom(1, 1.4), org, 16, 16, 16, 4, 4, 128);
 512         for (i=0 ; i<512 ; i++)
 513                 particle3(pt_blob2, 150+(rand()%6), particletexture, 2, 255, lhrandom(1, 1.4), org, 16, 16, 16, 4, 4, 128);
 514 }
 515
 516 /*
 517 ===============
 518 R_RunParticleEffect
 519
 520 ===============
 521 */
 522 void R_RunParticleEffect (vec3_t org, vec3_t dir, int color, int count)
 523 {
 524         if (!r_particles.value) return; // LordHavoc: particles are optional
 525
 526         if (count == 1024)
 527         {
 528                 R_ParticleExplosion(org, false);
 529                 return;
 530         }
 531         color &= ~7;
 532         if (count & 7)
 533         {
 534                 particle2(pt_fade, color + (rand()&7), particletexture, 6, (count & 7) * 16 + (rand()&15), 1, org, 8, 15);
 535                 count &= ~7;
 536         }
 537         count >>= 3;
 538         while (count--)
 539                 particle2(pt_fade, color + (rand()&7), particletexture, 6, 128, 1, org, 8, 15);
 540 }
 541
 542 // LordHavoc: added this for spawning sparks/dust (which have strong gravity)
 543 /*
 544 ===============
 545 R_SparkShower
 546 ===============
 547 */
 548 void R_SparkShower (vec3_t org, vec3_t dir, int count)
 549 {
 550         if (!r_particles.value) return; // LordHavoc: particles are optional
 551
 552         // smoke puff
 553         particle(pt_smokecloud, 12+(rand()&3), smokeparticletexture[rand()&7], 8, 64, 99, org[0], org[1], org[2], 0, 0, 0);
 554         // sparks
 555         while(count--)
 556                 particle2(pt_fallfadespark, ramp3[rand()%6], particletexture, 1, lhrandom(0, 255), 5, org, 4, 96);
 557 }
 558
 559 void R_BloodPuff (vec3_t org)
 560 {
 561         if (!r_particles.value) return; // LordHavoc: particles are optional
 562
 563         particle(pt_bloodcloud, 68+(rand()&3), smokeparticletexture[rand()&7], 12, 128, 99, org[0], org[1], org[2], 0, 0, 0);
 564 }
 565
 566 void R_BloodShower (vec3_t mins, vec3_t maxs, float velspeed, int count)
 567 {
 568         int                     j;
 569         particle_t      *p;
 570         vec3_t          diff;
 571         vec3_t          center;
 572         vec3_t          velscale;
 573         if (!r_particles.value) return; // LordHavoc: particles are optional
 574
 575         VectorSubtract(maxs, mins, diff);
 576         center[0] = (mins[0] + maxs[0]) * 0.5;
 577         center[1] = (mins[1] + maxs[1]) * 0.5;
 578         center[2] = (mins[2] + maxs[2]) * 0.5;
 579         // FIXME: change velspeed back to 2.0x after fixing mod
 580         velscale[0] = velspeed * 0.5 / diff[0];
 581         velscale[1] = velspeed * 0.5 / diff[1];
 582         velscale[2] = velspeed * 0.5 / diff[2];
 583
 584         while (count--)
 585         {
 586                 ALLOCPARTICLE
 587
 588                 p->texnum = smokeparticletexture[rand()&7];
 589                 p->scale = lhrandom(6, 8);
 590                 p->alpha = 96 + (rand()&63);
 591                 p->die = cl.time + 2;
 592                 p->type = pt_bloodcloud;
 593                 p->color = (rand()&3)+68;
 594                 for (j=0 ; j<3 ; j++)
 595                 {
 596                         p->org[j] = diff[j] * (float) (rand()%1024) * (1.0 / 1024.0) + mins[j];
 597                         p->vel[j] = (p->org[j] - center[j]) * velscale[j];
 598                 }
 599         }
 600 }
 601
 602 void R_ParticleCube (vec3_t mins, vec3_t maxs, vec3_t dir, int count, int colorbase, int gravity, int randomvel)
 603 {
 604         int                     j;
 605         particle_t      *p;
 606         vec3_t          diff;
 607         float           t;
 608         if (!r_particles.value) return; // LordHavoc: particles are optional
 609         if (maxs[0] <= mins[0]) {t = mins[0];mins[0] = maxs[0];maxs[0] = t;}
 610         if (maxs[1] <= mins[1]) {t = mins[1];mins[1] = maxs[1];maxs[1] = t;}
 611         if (maxs[2] <= mins[2]) {t = mins[2];mins[2] = maxs[2];maxs[2] = t;}
 612
 613         VectorSubtract(maxs, mins, diff);
 614
 615         while (count--)
 616         {
 617                 ALLOCPARTICLE
 618
 619                 p->texnum = particletexture;
 620                 p->scale = 6;
 621                 p->alpha = 255;
 622                 p->die = cl.time + 1 + (rand()&15)*0.0625;
 623                 if (gravity)
 624                         p->type = pt_grav;
 625                 else
 626                         p->type = pt_static;
 627                 p->color = colorbase + (rand()&3);
 628                 for (j=0 ; j<3 ; j++)
 629                 {
 630                         p->org[j] = diff[j] * (float) (rand()&1023) * (1.0 / 1024.0) + mins[j];
 631                         if (randomvel)
 632                                 p->vel[j] = dir[j] + (rand()%randomvel)-(randomvel*0.5);
 633                         else
 634                                 p->vel[j] = 0;
 635                 }
 636         }
 637 }
 638
 639 void R_ParticleRain (vec3_t mins, vec3_t maxs, vec3_t dir, int count, int colorbase, int type)
 640 {
 641         int                     i;
 642         particle_t      *p;
 643         vec3_t          diff;
 644         vec3_t          org;
 645         vec3_t          vel;
 646         float           t, z;
 647         if (!r_particles.value) return; // LordHavoc: particles are optional
 648         if (maxs[0] <= mins[0]) {t = mins[0];mins[0] = maxs[0];maxs[0] = t;}
 649         if (maxs[1] <= mins[1]) {t = mins[1];mins[1] = maxs[1];maxs[1] = t;}
 650         if (maxs[2] <= mins[2]) {t = mins[2];mins[2] = maxs[2];maxs[2] = t;}
 651         if (dir[2] < 0) // falling
 652         {
 653                 t = (maxs[2] - mins[2]) / -dir[2];
 654                 z = maxs[2];
 655         }
 656         else // rising??
 657         {
 658                 t = (maxs[2] - mins[2]) / dir[2];
 659                 z = mins[2];
 660         }
 661         if (t < 0 || t > 2) // sanity check
 662                 t = 2;
 663         t += cl.time;
 664
 665         VectorSubtract(maxs, mins, diff);
 666
 667         for (i=0 ; i<count ; i++)
 668         {
 669                 ALLOCPARTICLE
 670
 671                 vel[0] = dir[0] + (rand()&31) - 16;
 672                 vel[1] = dir[1] + (rand()&31) - 16;
 673                 vel[2] = dir[2] + (rand()&63) - 32;
 674                 org[0] = diff[0] * (float) (rand()&1023) * (1.0 / 1024.0) + mins[0];
 675                 org[1] = diff[1] * (float) (rand()&1023) * (1.0 / 1024.0) + mins[1];
 676                 org[2] = z;
 677
 678                 p->scale = 1.5;
 679                 p->alpha = 255;
 680                 p->die = t;
 681                 if (type == 1)
 682                 {
 683                         p->texnum = particletexture;
 684                         p->type = pt_snow;
 685                 }
 686                 else // 0
 687                 {
 688                         p->texnum = rainparticletexture;
 689                         p->type = pt_static;
 690                 }
 691                 p->color = colorbase + (rand()&3);
 692                 VectorCopy(org, p->org);
 693                 VectorCopy(vel, p->vel);
 694                 VectorCopy(vel, p->vel2);
 695         }
 696 }
 697
 698
 699 /*
 700 ===============
 701 R_LavaSplash
 702
 703 ===============
 704 */
 705 void R_LavaSplash (vec3_t org)
 706 {
 707         int                     i, j;
 708         particle_t      *p;
 709         float           vel;
 710         vec3_t          dir;
 711         if (!r_particles.value) return; // LordHavoc: particles are optional
 712
 713         for (i=-128 ; i<128 ; i+=16)
 714                 for (j=-128 ; j<128 ; j+=16)
 715                 {
 716                         ALLOCPARTICLE
 717
 718                         p->texnum = particletexture;
 719                         p->scale = 10;
 720                         p->alpha = 128;
 721                         p->die = cl.time + 2 + (rand()&31) * 0.02;
 722                         p->color = 224 + (rand()&7);
 723                         p->type = pt_grav;
 724
 725                         dir[0] = j + (rand()&7);
 726                         dir[1] = i + (rand()&7);
 727                         dir[2] = 256;
 728
 729                         p->org[0] = org[0] + dir[0];
 730                         p->org[1] = org[1] + dir[1];
 731                         p->org[2] = org[2] + (rand()&63);
 732
 733                         VectorNormalize (dir);
 734                         vel = 50 + (rand()&63);
 735                         VectorScale (dir, vel, p->vel);
 736                 }
 737 }
 738
 739 /*
 740 ===============
 741 R_TeleportSplash
 742
 743 ===============
 744 */
 745 void R_TeleportSplash (vec3_t org)
 746 {
 747         int                     i, j, k;
 748         particle_t      *p;
 749         if (!r_particles.value) return; // LordHavoc: particles are optional
 750
 751         for (i=-16 ; i<16 ; i+=8)
 752                 for (j=-16 ; j<16 ; j+=8)
 753                         for (k=-24 ; k<32 ; k+=8)
 754                         {
 755                                 ALLOCPARTICLE
 756
 757                                 p->texnum = particletexture;
 758                                 p->scale = 1;
 759                                 p->alpha = lhrandom(32,128);
 760                                 p->die = cl.time + 5;
 761                                 p->color = 254;
 762                                 p->type = pt_fade;
 763
 764                                 p->org[0] = org[0] + i + (rand()&7);
 765                                 p->org[1] = org[1] + j + (rand()&7);
 766                                 p->org[2] = org[2] + k + (rand()&7);
 767
 768                                 p->vel[0] = i*2 + (rand()%25) - 12;
 769                                 p->vel[1] = j*2 + (rand()%25) - 12;
 770                                 p->vel[2] = k*2 + (rand()%25) - 12 + 40;
 771                         }
 772 }
 773
 774 void R_RocketTrail (vec3_t start, vec3_t end, int type, entity_t *ent)
 775 {
 776         vec3_t          vec;
 777         float           len, dec = 0, t, nt, speed;
 778         int                     j, contents, bubbles;
 779         particle_t      *p;
 780         static int      tracercount;
 781         if (!r_particles.value) return; // LordHavoc: particles are optional
 782
 783         t = cl.oldtime;
 784         nt = cl.time;
 785         if (ent->trail_leftover < 0)
 786                 ent->trail_leftover = 0;
 787         t += ent->trail_leftover;
 788         ent->trail_leftover -= (cl.time - cl.oldtime);
 789         if (t >= cl.time)
 790                 return;
 791
 792         contents = Mod_PointInLeaf(start, cl.worldmodel)->contents;
 793         if (contents == CONTENTS_SKY || contents == CONTENTS_LAVA)
 794                 return;
 795
 796         VectorSubtract (end, start, vec);
 797         len = VectorNormalizeLength (vec);
 798         if (len <= 0.01f)
 799                 return;
 800         speed = len / (nt - t);
 801
 802         bubbles = (contents == CONTENTS_WATER || contents == CONTENTS_SLIME);
 803
 804         while (t < nt)
 805         {
 806                 ALLOCPARTICLE
 807
 808                 p->vel[0] = p->vel[1] = p->vel[2] = 0;
 809                 p->die = cl.time + 2;
 810
 811                 switch (type)
 812                 {
 813                         case 0: // rocket trail
 814                         case 1: // grenade trail
 815                                 if (bubbles)
 816                                 {
 817                                         dec = 0.005f;
 818                                         p->texnum = bubbleparticletexture;
 819                                         p->scale = lhrandom(1,2);
 820                                         p->alpha = 255;
 821                                         p->color = (rand()&3)+12;
 822                                         p->type = pt_bubble;
 823                                         p->die = cl.time + 2;
 824                                         for (j=0 ; j<3 ; j++)
 825                                         {
 826                                                 p->vel[j] = (rand()&31)-16;
 827                                                 p->org[j] = start[j] + ((rand()&3)-2);
 828                                         }
 829                                 }
 830                                 else
 831                                 {
 832                                         dec = 0.02f;
 833                                         p->texnum = smokeparticletexture[rand()&7];
 834                                         p->scale = lhrandom(8, 12);
 835                                         p->alpha = 64 + (rand()&31);
 836                                         p->color = (rand()&3)+12;
 837                                         p->type = pt_smoke;
 838                                         p->die = cl.time + 10000;
 839                                         VectorCopy(start, p->org);
 840                                 }
 841                                 break;
 842
 843                                 /*
 844                         case 1: // smoke smoke
 845                                 dec = 0.016f;
 846                                 p->texnum = smokeparticletexture;
 847                                 p->scale = lhrandom(6,9);
 848                                 p->alpha = 64;
 849                                 if (r_smokecolor.value)
 850                                         p->color = r_smokecolor.value;
 851                                 else
 852                                         p->color = (rand()&3)+12;
 853                                 p->type = pt_smoke;
 854                                 p->die = cl.time + 1;
 855                                 VectorCopy(start, p->org);
 856                                 break;
 857                                 */
 858
 859                         case 2: // blood
 860                         case 4: // slight blood
 861                                 dec = 0.025f;
 862                                 p->texnum = smokeparticletexture[rand()&7];
 863                                 p->scale = lhrandom(6, 8);
 864                                 p->alpha = type == 4 ? 192 : 255;
 865                                 p->color = (rand()&3)+68;
 866                                 p->type = pt_bloodcloud;
 867                                 p->die = cl.time + 9999;
 868                                 for (j=0 ; j<3 ; j++)
 869                                 {
 870                                         p->vel[j] = (rand()&15)-8;
 871                                         p->org[j] = start[j] + ((rand()&3)-2);
 872                                 }
 873                                 break;
 874
 875                         case 3:
 876                         case 5: // tracer
 877                                 dec = 0.02f;
 878                                 p->texnum = smokeparticletexture[rand()&7];
 879                                 p->scale = 4;
 880                                 p->alpha = 64 + (rand()&31);
 881                                 p->color = type == 3 ? 56 : 234;
 882                                 p->type = pt_fade;
 883                                 p->die = cl.time + 10000;
 884                                 VectorCopy(start, p->org);
 885                                 break;
 886
 887                         case 6: // voor trail
 888                                 dec = 0.05f; // sparse trail
 889                                 p->texnum = smokeparticletexture[rand()&7];
 890                                 p->scale = lhrandom(3, 5);
 891                                 p->alpha = 255;
 892                                 p->color = 9*16 + 8 + (rand()&3);
 893                                 p->type = pt_fade;
 894                                 p->die = cl.time + 2;
 895                                 for (j=0 ; j<3 ; j++)
 896                                 {
 897                                         p->vel[j] = (rand()&15)-8;
 898                                         p->org[j] = start[j] + ((rand()&3)-2);
 899                                 }
 900                                 break;
 901
 902                         case 7: // Nehahra smoke tracer
 903                                 dec = 0.14f;
 904                                 p->texnum = smokeparticletexture[rand()&7];
 905                                 p->scale = lhrandom(8, 12);
 906                                 p->alpha = 64;
 907                                 p->color = (rand()&3)+12;
 908                                 p->type = pt_smoke;
 909                                 p->die = cl.time + 10000;
 910                                 for (j=0 ; j<3 ; j++)
 911                                         p->org[j] = start[j] + ((rand()&3)-2);
 912                                 break;
 913                 }
 914
 915                 t += dec;
 916                 dec *= speed;
 917                 VectorMA (start, dec, vec, start);
 918         }
 919         ent->trail_leftover = t - cl.time;
 920 }
 921
 922 void R_RocketTrail2 (vec3_t start, vec3_t end, int color, entity_t *ent)
 923 {
 924         vec3_t          vec;
 925         int                     len;
 926         if (!r_particles.value) return; // LordHavoc: particles are optional
 927
 928         VectorSubtract (end, start, vec);
 929         len = (int) (VectorNormalizeLength (vec) * (1.0f / 3.0f));
 930         VectorScale(vec, 3, vec);
 931         while (len--)
 932         {
 933                 particle(pt_smoke, color, particletexture, 8, 192, 99, start[0], start[1], start[2], 0, 0, 0);
 934                 VectorAdd (start, vec, start);
 935         }
 936 }
 937
 938
 939 extern qboolean lighthalf;
 940
 941 /*
 942 ===============
 943 R_DrawParticles
 944 ===============
 945 */
 946 extern  cvar_t  sv_gravity;
 947 void R_CompleteLightPoint (vec3_t color, vec3_t p);
 948
 949 void R_DrawParticles (void)
 950 {
 951         particle_t              *p;
 952         int                             i, r,g,b,a;
 953         float                   gravity, dvel, frametime, scale, scale2, minparticledist;
 954         byte                    *color24;
 955         vec3_t                  up, right, uprightangles, forward2, up2, right2, tempcolor;
 956         int                             activeparticles, maxparticle, j, k;
 957
 958         // LordHavoc: early out condition
 959         if (!numparticles)
 960                 return;
 961
 962         VectorScale (vup, 1.5, up);
 963         VectorScale (vright, 1.5, right);
 964
 965         uprightangles[0] = 0;
 966         uprightangles[1] = r_refdef.viewangles[1];
 967         uprightangles[2] = 0;
 968         AngleVectors (uprightangles, forward2, right2, up2);
 969
 970         frametime = cl.time - cl.oldtime;
 971         gravity = frametime * sv_gravity.value;
 972         dvel = 1+4*frametime;
 973
 974         minparticledist = DotProduct(r_refdef.vieworg, vpn) + 16.0f;
 975
 976         activeparticles = 0;
 977         maxparticle = -1;
 978         j = 0;
 979         for (k = 0, p = particles;k < numparticles;k++, p++)
 980         {
 981                 if (p->die < cl.time)
 982                 {
 983                         freeparticles[j++] = p;
 984                         continue;
 985                 }
 986                 maxparticle = k;
 987                 activeparticles++;
 988
 989                 // LordHavoc: only render if not too close
 990                 if (DotProduct(p->org, vpn) >= minparticledist)
 991                 {
 992                         color24 = (byte *) &d_8to24table[(int)p->color];
 993                         r = color24[0];
 994                         g = color24[1];
 995                         b = color24[2];
 996                         a = p->alpha;
 997                         if (r_dynamicparticles.value)
 998                         {
 999                                 R_CompleteLightPoint(tempcolor, p->org);
1000                                 r = (r * (int) tempcolor[0]) >> 7;
1001                                 g = (g * (int) tempcolor[1]) >> 7;
1002                                 b = (b * (int) tempcolor[2]) >> 7;
1003                         }
1004                         transpolybegin(p->texnum, 0, p->texnum, TPOLYTYPE_ALPHA);
1005                         scale = p->scale * -0.5;scale2 = p->scale * 0.5;
1006                         if (p->texnum == rainparticletexture) // rain streak
1007                         {
1008                                 transpolyvert(p->org[0] + up2[0]*scale  + right2[0]*scale , p->org[1] + up2[1]*scale  + right2[1]*scale , p->org[2] + up2[2]*scale  + right2[2]*scale , 0,1,r,g,b,a);
1009                                 transpolyvert(p->org[0] + up2[0]*scale2 + right2[0]*scale , p->org[1] + up2[1]*scale2 + right2[1]*scale , p->org[2] + up2[2]*scale2 + right2[2]*scale , 0,0,r,g,b,a);
1010                                 transpolyvert(p->org[0] + up2[0]*scale2 + right2[0]*scale2, p->org[1] + up2[1]*scale2 + right2[1]*scale2, p->org[2] + up2[2]*scale2 + right2[2]*scale2, 1,0,r,g,b,a);
1011                                 transpolyvert(p->org[0] + up2[0]*scale  + right2[0]*scale2, p->org[1] + up2[1]*scale  + right2[1]*scale2, p->org[2] + up2[2]*scale  + right2[2]*scale2, 1,1,r,g,b,a);
1012                         }
1013                         else
1014                         {
1015                                 transpolyvert(p->org[0] + up[0]*scale  + right[0]*scale , p->org[1] + up[1]*scale  + right[1]*scale , p->org[2] + up[2]*scale  + right[2]*scale , 0,1,r,g,b,a);
1016                                 transpolyvert(p->org[0] + up[0]*scale2 + right[0]*scale , p->org[1] + up[1]*scale2 + right[1]*scale , p->org[2] + up[2]*scale2 + right[2]*scale , 0,0,r,g,b,a);
1017                                 transpolyvert(p->org[0] + up[0]*scale2 + right[0]*scale2, p->org[1] + up[1]*scale2 + right[1]*scale2, p->org[2] + up[2]*scale2 + right[2]*scale2, 1,0,r,g,b,a);
1018                                 transpolyvert(p->org[0] + up[0]*scale  + right[0]*scale2, p->org[1] + up[1]*scale  + right[1]*scale2, p->org[2] + up[2]*scale  + right[2]*scale2, 1,1,r,g,b,a);
1019                         }
1020                         transpolyend();
1021                 }
1022
1023                 p->org[0] += p->vel[0]*frametime;
1024                 p->org[1] += p->vel[1]*frametime;
1025                 p->org[2] += p->vel[2]*frametime;
1026
1027                 switch (p->type)
1028                 {
1029                 case pt_static:
1030                         break;
1031
1032                 case pt_blob:
1033                         for (i=0 ; i<3 ; i++)
1034                                 p->vel[i] *= dvel;
1035                         break;
1036
1037                 case pt_blob2:
1038                         for (i=0 ; i<2 ; i++)
1039                                 p->vel[i] *= dvel;
1040                         break;
1041
1042                 case pt_grav:
1043                         p->vel[2] -= gravity;
1044                         break;
1045 // LordHavoc: for smoke trails
1046                 case pt_smoke:
1047                         p->scale += frametime * 6;
1048                         p->alpha -= frametime * 128;
1049                         if (p->alpha < 1)
1050                                 p->die = -1;
1051                         break;
1052                 case pt_snow:
1053                         if (cl.time > p->time2)
1054                         {
1055                                 p->time2 = cl.time + (rand() & 3) * 0.1;
1056                                 p->vel[0] = (rand()&63)-32 + p->vel2[0];
1057                                 p->vel[1] = (rand()&63)-32 + p->vel2[1];
1058                                 p->vel[2] = (rand()&63)-32 + p->vel2[2];
1059                         }
1060                         break;
1061                 case pt_bloodcloud:
1062                         if (Mod_PointInLeaf(p->org, cl.worldmodel)->contents != CONTENTS_EMPTY)
1063                         {
1064                                 p->die = -1;
1065                                 break;
1066                         }
1067                         p->scale += frametime * 4;
1068                         p->alpha -= frametime * 64;
1069                         if (p->alpha < 1 || p->scale < 1)
1070                                 p->die = -1;
1071                         break;
1072                 case pt_fallfadespark:
1073                         p->alpha -= frametime * 256;
1074                         p->vel[2] -= gravity;
1075                         if (p->alpha < 1)
1076                                 p->die = -1;
1077                         break;
1078                 case pt_fade:
1079                         p->alpha -= frametime * 512;
1080                         if (p->alpha < 1)
1081                                 p->die = -1;
1082                         break;
1083                 case pt_bubble:
1084                         a = Mod_PointInLeaf(p->org, cl.worldmodel)->contents;
1085                         if (a != CONTENTS_WATER && a != CONTENTS_SLIME)
1086                                 p->die = -1;
1087                         p->vel[2] += gravity * 0.25;
1088                         p->vel[0] *= (1 - (frametime * 0.0625));
1089                         p->vel[1] *= (1 - (frametime * 0.0625));
1090                         p->vel[2] *= (1 - (frametime * 0.0625));
1091                         if (cl.time > p->time2)
1092                         {
1093                                 p->time2 = cl.time + lhrandom(0, 0.5);
1094                                 p->vel[0] += lhrandom(-32,32);
1095                                 p->vel[1] += lhrandom(-32,32);
1096                                 p->vel[2] += lhrandom(-32,32);
1097                         }
1098                         p->alpha -= frametime * 64;
1099                         if (p->alpha < 1)
1100                                 p->die = -1;
1101                         break;
1102                 case pt_smokecloud:
1103                         p->scale += frametime * 60;
1104                         p->alpha -= frametime * 96;
1105                         if (p->alpha < 1)
1106                                 p->die = -1;
1107                         break;
1108                 }
1109         }
1110         // fill in gaps to compact the array
1111         i = 0;
1112         while (maxparticle >= activeparticles)
1113         {
1114                 *freeparticles[i++] = particles[maxparticle--];
1115                 while (maxparticle >= activeparticles && particles[maxparticle].die < cl.time)
1116                         maxparticle--;
1117         }
1118         numparticles = activeparticles;
1119 }
1120