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_rain, pt_bloodcloud, pt_fallfadespark, pt_bubble, pt_fade, pt_smokecloud, pt_splash
  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         float           scale;
  39         short           texnum;
  40         float           alpha; // 0-255
  41         float           time2; // used for various things (snow fluttering, for example)
  42         vec3_t          oldorg;
  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 byte shadebubble(float dx, float dy, vec3_t light)
  73 {
  74         float   dz, f, dot;
  75         vec3_t  normal;
  76         if ((dx*dx+dy*dy) < 1) // it does hit the sphere
  77         {
  78                 dz = 1 - (dx*dx+dy*dy);
  79                 f = 0;
  80                 // back side
  81                 normal[0] = dx;normal[1] = dy;normal[2] = dz;
  82                 VectorNormalize(normal);
  83                 dot = DotProduct(normal, light);
  84                 if (dot > 0.5) // interior reflection
  85                         f += ((dot *  2) - 1);
  86                 else if (dot < -0.5) // exterior reflection
  87                         f += ((dot * -2) - 1);
  88                 // front side
  89                 normal[0] = dx;normal[1] = dy;normal[2] = -dz;
  90                 VectorNormalize(normal);
  91                 dot = DotProduct(normal, light);
  92                 if (dot > 0.5) // interior reflection
  93                         f += ((dot *  2) - 1);
  94                 else if (dot < -0.5) // exterior reflection
  95                         f += ((dot * -2) - 1);
  96                 f *= 128;
  97                 f += 16; // just to give it a haze so you can see the outline
  98                 f = bound(0, f, 255);
  99                 return (byte) f;
 100         }
 101         else
 102                 return 0;
 103 }
 104
 105 void R_InitParticleTexture (void)
 106 {
 107         int             x,y,d,i,m;
 108         float   dx, dy;
 109         byte    data[32][32][4], noise1[32][32], noise2[32][32];
 110         vec3_t  light;
 111
 112         for (y = 0;y < 32;y++)
 113         {
 114                 dy = y - 16;
 115                 for (x = 0;x < 32;x++)
 116                 {
 117                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
 118                         dx = x - 16;
 119                         d = (255 - (dx*dx+dy*dy));
 120                         if (d < 0) d = 0;
 121                         data[y][x][3] = (byte) d;
 122                 }
 123         }
 124         particletexture = GL_LoadTexture ("particletexture", 32, 32, &data[0][0][0], true, true, 4);
 125
 126         for (i = 0;i < 8;i++)
 127         {
 128                 do
 129                 {
 130                         fractalnoise(&noise1[0][0], 32, 1);
 131                         fractalnoise(&noise2[0][0], 32, 8);
 132                         m = 0;
 133                         for (y = 0;y < 32;y++)
 134                         {
 135                                 dy = y - 16;
 136                                 for (x = 0;x < 32;x++)
 137                                 {
 138                                         data[y][x][0] = data[y][x][1] = data[y][x][2] = (noise1[y][x] >> 1) + 128;
 139                                         dx = x - 16;
 140                                         d = ((noise2[y][x] * 384) >> 8) - 128;
 141                                         if (d > 0)
 142                                         {
 143                                                 if (d > 255)
 144                                                         d = 255;
 145                                                 d = (d * (255 - (int) (dx*dx+dy*dy))) >> 7;
 146                                                 if (d < 0) d = 0;
 147                                                 if (d > 255) d = 255;
 148                                                 data[y][x][3] = (byte) d;
 149                                                 if (m < d)
 150                                                         m = d;
 151                                         }
 152                                         else
 153                                                 data[y][x][3] = 0;
 154                                 }
 155                         }
 156                 }
 157                 while (m < 192);
 158
 159                 smokeparticletexture[i] = GL_LoadTexture (va("smokeparticletexture%d", i), 32, 32, &data[0][0][0], true, true, 4);
 160         }
 161
 162         light[0] = 1;light[1] = 1;light[2] = 1;
 163         VectorNormalize(light);
 164         for (x=0 ; x<32 ; x++)
 165         {
 166                 for (y=0 ; y<32 ; y++)
 167                 {
 168                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
 169                         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);
 170                 }
 171         }
 172         rainparticletexture = GL_LoadTexture ("rainparticletexture", 32, 32, &data[0][0][0], true, true, 4);
 173
 174         light[0] = 1;light[1] = 1;light[2] = 1;
 175         VectorNormalize(light);
 176         for (x=0 ; x<32 ; x++)
 177         {
 178                 for (y=0 ; y<32 ; y++)
 179                 {
 180                         data[y][x][0] = data[y][x][1] = data[y][x][2] = 255;
 181                         data[y][x][3] = shadebubble((x - 16) * (1.0 / 16.0), (y - 16) * (1.0 / 16.0), light);
 182                 }
 183         }
 184         bubbleparticletexture = GL_LoadTexture ("bubbleparticletexture", 32, 32, &data[0][0][0], true, true, 4);
 185 }
 186
 187 void r_part_start()
 188 {
 189         particles = (particle_t *) malloc (r_numparticles * sizeof(particle_t));
 190         freeparticles = (void *) malloc (r_numparticles * sizeof(particle_t *));
 191         R_InitParticleTexture ();
 192 }
 193
 194 void r_part_shutdown()
 195 {
 196         free(particles);
 197         free(freeparticles);
 198 }
 199
 200 /*
 201 ===============
 202 R_InitParticles
 203 ===============
 204 */
 205 void R_Particles_Init (void)
 206 {
 207         int             i;
 208
 209         i = COM_CheckParm ("-particles");
 210
 211         if (i)
 212         {
 213                 r_numparticles = (int)(atoi(com_argv[i+1]));
 214                 if (r_numparticles < ABSOLUTE_MIN_PARTICLES)
 215                         r_numparticles = ABSOLUTE_MIN_PARTICLES;
 216         }
 217         else
 218         {
 219                 r_numparticles = MAX_PARTICLES;
 220         }
 221
 222         Cvar_RegisterVariable (&r_particles);
 223         Cvar_RegisterVariable (&r_dynamicparticles);
 224
 225         R_RegisterModule("R_Particles", r_part_start, r_part_shutdown);
 226 }
 227
 228 #define particle(ptype, pcolor, ptex, pscale, palpha, ptime, px, py, pz, pvx, pvy, pvz)\
 229 {\
 230         particle_t      *p;\
 231         ALLOCPARTICLE\
 232         p->type = (ptype);\
 233         p->color = (pcolor);\
 234         p->texnum = (ptex);\
 235         p->scale = (pscale);\
 236         p->alpha = (palpha);\
 237         p->die = cl.time + (ptime);\
 238         p->org[0] = (px);\
 239         p->org[1] = (py);\
 240         p->org[2] = (pz);\
 241         p->vel[0] = (pvx);\
 242         p->vel[1] = (pvy);\
 243         p->vel[2] = (pvz);\
 244 }
 245 #define particle2(ptype, pcolor, ptex, pscale, palpha, ptime, pbase, poscale, pvscale)\
 246 {\
 247         particle_t      *p;\
 248         ALLOCPARTICLE\
 249         p->type = (ptype);\
 250         p->color = (pcolor);\
 251         p->texnum = (ptex);\
 252         p->scale = (pscale);\
 253         p->alpha = (palpha);\
 254         p->die = cl.time + (ptime);\
 255         p->org[0] = lhrandom(-(poscale), (poscale)) + (pbase)[0];\
 256         p->org[1] = lhrandom(-(poscale), (poscale)) + (pbase)[1];\
 257         p->org[2] = lhrandom(-(poscale), (poscale)) + (pbase)[2];\
 258         p->vel[0] = lhrandom(-(pvscale), (pvscale));\
 259         p->vel[1] = lhrandom(-(pvscale), (pvscale));\
 260         p->vel[2] = lhrandom(-(pvscale), (pvscale));\
 261 }
 262 #define particle3(ptype, pcolor, ptex, pscale, palpha, ptime, pbase, pscalex, pscaley, pscalez, pvscalex, pvscaley, pvscalez)\
 263 {\
 264         particle_t      *p;\
 265         ALLOCPARTICLE\
 266         p->type = (ptype);\
 267         p->color = (pcolor);\
 268         p->texnum = (ptex);\
 269         p->scale = (pscale);\
 270         p->alpha = (palpha);\
 271         p->die = cl.time + (ptime);\
 272         p->org[0] = lhrandom(-(pscalex), (pscalex)) + (pbase)[0];\
 273         p->org[1] = lhrandom(-(pscaley), (pscaley)) + (pbase)[1];\
 274         p->org[2] = lhrandom(-(pscalez), (pscalez)) + (pbase)[2];\
 275         p->vel[0] = lhrandom(-(pvscalex), (pvscalex));\
 276         p->vel[1] = lhrandom(-(pvscaley), (pvscaley));\
 277         p->vel[2] = lhrandom(-(pvscalez), (pvscalez));\
 278 }
 279 /*
 280 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)
 281 {
 282         particle_t      *p;
 283         ALLOCPARTICLE
 284
 285         p->type = type;
 286         p->color = color;
 287         p->texnum = tex;
 288         p->scale = scale;
 289         p->alpha = alpha;
 290         p->die = cl.time + time;
 291         p->org[0] = x;
 292         p->org[1] = y;
 293         p->org[2] = z;
 294         p->vel[0] = vx;
 295         p->vel[1] = vy;
 296         p->vel[2] = vz;
 297 }
 298 void particle2(int type, int color, int tex, float scale, int alpha, float time, vec3_t base, float oscale, float vscale)
 299 {
 300         particle_t      *p;
 301         ALLOCPARTICLE
 302
 303         p->type = type;
 304         p->color = color;
 305         p->texnum = tex;
 306         p->scale = scale;
 307         p->alpha = alpha;
 308         p->die = cl.time + time;
 309         p->org[0] = lhrandom(-oscale, oscale) + base[0];
 310         p->org[1] = lhrandom(-oscale, oscale) + base[1];
 311         p->org[2] = lhrandom(-oscale, oscale) + base[2];
 312         p->vel[0] = lhrandom(-vscale, vscale);
 313         p->vel[1] = lhrandom(-vscale, vscale);
 314         p->vel[2] = lhrandom(-vscale, vscale);
 315 }
 316 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)
 317 {
 318         particle_t      *p;
 319         ALLOCPARTICLE
 320
 321         p->type = type;
 322         p->color = color;
 323         p->texnum = tex;
 324         p->scale = scale;
 325         p->alpha = alpha;
 326         p->die = cl.time + time;
 327         p->org[0] = lhrandom(-scalex, scalex) + base[0];
 328         p->org[1] = lhrandom(-scaley, scaley) + base[1];
 329         p->org[2] = lhrandom(-scalez, scalez) + base[2];
 330         p->vel[0] = lhrandom(-vscalex, vscalex);
 331         p->vel[1] = lhrandom(-vscaley, vscaley);
 332         p->vel[2] = lhrandom(-vscalez, vscalez);
 333 }
 334 */
 335
 336 /*
 337 ===============
 338 R_EntityParticles
 339 ===============
 340 */
 341
 342 #define NUMVERTEXNORMALS        162
 343 extern  float   r_avertexnormals[NUMVERTEXNORMALS][3];
 344 vec3_t  avelocities[NUMVERTEXNORMALS];
 345 float   beamlength = 16;
 346 vec3_t  avelocity = {23, 7, 3};
 347 float   partstep = 0.01;
 348 float   timescale = 0.01;
 349
 350 void R_EntityParticles (entity_t *ent)
 351 {
 352         int                     count;
 353         int                     i;
 354         float           angle;
 355         float           sp, sy, cp, cy;
 356         vec3_t          forward;
 357         float           dist;
 358         if (!r_particles.value) return; // LordHavoc: particles are optional
 359
 360         dist = 64;
 361         count = 50;
 362
 363         if (!avelocities[0][0])
 364                 for (i=0 ; i<NUMVERTEXNORMALS*3 ; i++)
 365                         avelocities[0][i] = (rand()&255) * 0.01;
 366
 367         for (i=0 ; i<NUMVERTEXNORMALS ; i++)
 368         {
 369                 angle = cl.time * avelocities[i][0];
 370                 sy = sin(angle);
 371                 cy = cos(angle);
 372                 angle = cl.time * avelocities[i][1];
 373                 sp = sin(angle);
 374                 cp = cos(angle);
 375
 376                 forward[0] = cp*cy;
 377                 forward[1] = cp*sy;
 378                 forward[2] = -sp;
 379
 380                 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);
 381         }
 382 }
 383
 384
 385 /*
 386 ===============
 387 R_ClearParticles
 388 ===============
 389 */
 390 void R_ClearParticles (void)
 391 {
 392 //      int             i;
 393 //      free_particles = &particles[0];
 394 //      active_particles = NULL;
 395
 396 //      for (i=0 ;i<r_numparticles ; i++)
 397 //              particles[i].next = &particles[i+1];
 398 //      particles[r_numparticles-1].next = NULL;
 399
 400         numparticles = 0;
 401 }
 402
 403
 404 void R_ReadPointFile_f (void)
 405 {
 406         FILE    *f;
 407         vec3_t  org;
 408         int             r;
 409         int             c;
 410         char    name[MAX_OSPATH];
 411
 412         sprintf (name,"maps/%s.pts", sv.name);
 413
 414         COM_FOpenFile (name, &f, false);
 415         if (!f)
 416         {
 417                 Con_Printf ("couldn't open %s\n", name);
 418                 return;
 419         }
 420
 421         Con_Printf ("Reading %s...\n", name);
 422         c = 0;
 423         for (;;)
 424         {
 425                 r = fscanf (f,"%f %f %f\n", &org[0], &org[1], &org[2]);
 426                 if (r != 3)
 427                         break;
 428                 c++;
 429
 430                 if (numparticles >= r_numparticles)
 431                 {
 432                         Con_Printf ("Not enough free particles\n");
 433                         break;
 434                 }
 435                 particle(pt_static, (-c)&15, particletexture, 2, 255, 99999, org[0], org[1], org[2], 0, 0, 0);
 436         }
 437
 438         fclose (f);
 439         Con_Printf ("%i points read\n", c);
 440 }
 441
 442 /*
 443 ===============
 444 R_ParseParticleEffect
 445
 446 Parse an effect out of the server message
 447 ===============
 448 */
 449 void R_ParseParticleEffect (void)
 450 {
 451         vec3_t          org, dir;
 452         int                     i, count, msgcount, color;
 453
 454         for (i=0 ; i<3 ; i++)
 455                 org[i] = MSG_ReadCoord ();
 456         for (i=0 ; i<3 ; i++)
 457                 dir[i] = MSG_ReadChar () * (1.0/16);
 458         msgcount = MSG_ReadByte ();
 459         color = MSG_ReadByte ();
 460
 461 if (msgcount == 255)
 462         count = 1024;
 463 else
 464         count = msgcount;
 465
 466         R_RunParticleEffect (org, dir, color, count);
 467 }
 468
 469 /*
 470 ===============
 471 R_ParticleExplosion
 472
 473 ===============
 474 */
 475 void R_ParticleExplosion (vec3_t org, int smoke)
 476 {
 477         int                     i;
 478         if (!r_particles.value) return; // LordHavoc: particles are optional
 479
 480         particle(pt_smokecloud, (rand()&7) + 8, smokeparticletexture[rand()&7], 30, 160, 2, org[0], org[1], org[2], 0, 0, 0);
 481
 482         i = Mod_PointInLeaf(org, cl.worldmodel)->contents;
 483         if (i == CONTENTS_SLIME || i == CONTENTS_WATER)
 484         {
 485                 for (i=0 ; i<128 ; i++)
 486                         particle2(pt_bubble, (rand()&3) + 12, bubbleparticletexture, lhrandom(1, 2), 255, 2, org, 16, 96);
 487         }
 488         else
 489         {
 490                 for (i = 0;i < 256;i++)
 491                         particle(pt_fallfadespark, ramp3[rand()%6], particletexture, 1.5, lhrandom(0, 255), 5, lhrandom(-16, 16) + org[0], lhrandom(-16, 16) + org[1], lhrandom(-16, 16) + org[2], lhrandom(-192, 192), lhrandom(-192, 192), lhrandom(-192, 192) + 192);
 492         }
 493
 494 }
 495
 496 /*
 497 ===============
 498 R_ParticleExplosion2
 499
 500 ===============
 501 */
 502 void R_ParticleExplosion2 (vec3_t org, int colorStart, int colorLength)
 503 {
 504         int                     i;
 505         if (!r_particles.value) return; // LordHavoc: particles are optional
 506
 507         for (i = 0;i < 512;i++)
 508                 particle2(pt_fade, colorStart + (i % colorLength), particletexture, 1.5, 255, 0.3, org, 8, 192);
 509 }
 510
 511 /*
 512 ===============
 513 R_BlobExplosion
 514
 515 ===============
 516 */
 517 void R_BlobExplosion (vec3_t org)
 518 {
 519         int                     i;
 520         if (!r_particles.value) return; // LordHavoc: particles are optional
 521
 522         for (i=0 ; i<512 ; i++)
 523                 particle3(pt_blob, 66+(rand()%6), particletexture, 2, 255, lhrandom(1, 1.4), org, 16, 16, 16, 4, 4, 128);
 524         for (i=0 ; i<512 ; i++)
 525                 particle3(pt_blob2, 150+(rand()%6), particletexture, 2, 255, lhrandom(1, 1.4), org, 16, 16, 16, 4, 4, 128);
 526 }
 527
 528 /*
 529 ===============
 530 R_RunParticleEffect
 531
 532 ===============
 533 */
 534 void R_RunParticleEffect (vec3_t org, vec3_t dir, int color, int count)
 535 {
 536         if (!r_particles.value) return; // LordHavoc: particles are optional
 537
 538         if (count == 1024)
 539         {
 540                 R_ParticleExplosion(org, false);
 541                 return;
 542         }
 543         color &= ~7;
 544         if (count & 7)
 545         {
 546                 particle2(pt_fade, color + (rand()&7), particletexture, 6, (count & 7) * 16 + (rand()&15), 1, org, 8, 15);
 547                 count &= ~7;
 548         }
 549         count >>= 3;
 550         while (count--)
 551                 particle2(pt_fade, color + (rand()&7), particletexture, 6, 128, 1, org, 8, 15);
 552 }
 553
 554 // LordHavoc: added this for spawning sparks/dust (which have strong gravity)
 555 /*
 556 ===============
 557 R_SparkShower
 558 ===============
 559 */
 560 void R_SparkShower (vec3_t org, vec3_t dir, int count)
 561 {
 562         if (!r_particles.value) return; // LordHavoc: particles are optional
 563
 564         // smoke puff
 565         particle(pt_smokecloud, 12+(rand()&3), smokeparticletexture[rand()&7], 8, 64, 99, org[0], org[1], org[2], 0, 0, 0);
 566         // sparks
 567         while(count--)
 568 //              particle2(pt_fallfadespark, ramp3[rand()%6], particletexture, 1, lhrandom(0, 255), 5, org, 4, 96);
 569                 particle(pt_fallfadespark, ramp3[rand()%6], particletexture, 1, lhrandom(0, 255), 5, lhrandom(-4, 4) + org[0], lhrandom(-4, 4) + org[1], lhrandom(-4, 4) + org[2], lhrandom(-64, 64), lhrandom(-64, 64), lhrandom(-64, 64) + 64);
 570 }
 571
 572 void R_BloodPuff (vec3_t org)
 573 {
 574         if (!r_particles.value) return; // LordHavoc: particles are optional
 575
 576         particle(pt_bloodcloud, 68+(rand()&3), smokeparticletexture[rand()&7], 12, 128, 99, org[0], org[1], org[2], 0, 0, 0);
 577         particle(pt_bloodcloud, 68+(rand()&3), smokeparticletexture[rand()&7], 10, 128, 99, org[0] + lhrandom(-4, 4), org[1] + lhrandom(-4, 4), org[2] + lhrandom(-4, 4), 0, 0, 0);
 578         particle(pt_bloodcloud, 68+(rand()&3), smokeparticletexture[rand()&7], 8, 128, 99, org[0] + lhrandom(-4, 4), org[1] + lhrandom(-4, 4), org[2] + lhrandom(-4, 4), 0, 0, 0);
 579 }
 580
 581 void R_BloodShower (vec3_t mins, vec3_t maxs, float velspeed, int count)
 582 {
 583         int                     j;
 584         particle_t      *p;
 585         vec3_t          diff;
 586         vec3_t          center;
 587         vec3_t          velscale;
 588         if (!r_particles.value) return; // LordHavoc: particles are optional
 589
 590         VectorSubtract(maxs, mins, diff);
 591         center[0] = (mins[0] + maxs[0]) * 0.5;
 592         center[1] = (mins[1] + maxs[1]) * 0.5;
 593         center[2] = (mins[2] + maxs[2]) * 0.5;
 594         // FIXME: change velspeed back to 2.0x after fixing mod
 595         velscale[0] = velspeed * 0.5 / diff[0];
 596         velscale[1] = velspeed * 0.5 / diff[1];
 597         velscale[2] = velspeed * 0.5 / diff[2];
 598
 599         while (count--)
 600         {
 601                 ALLOCPARTICLE
 602
 603                 p->texnum = smokeparticletexture[rand()&7];
 604                 p->scale = lhrandom(4, 6);
 605                 p->alpha = 96 + (rand()&63);
 606                 p->die = cl.time + 2;
 607                 p->type = pt_bloodcloud;
 608                 p->color = (rand()&3)+68;
 609                 for (j=0 ; j<3 ; j++)
 610                 {
 611                         p->org[j] = diff[j] * (float) (rand()%1024) * (1.0 / 1024.0) + mins[j];
 612                         p->vel[j] = (p->org[j] - center[j]) * velscale[j];
 613                 }
 614         }
 615 }
 616
 617 void R_ParticleCube (vec3_t mins, vec3_t maxs, vec3_t dir, int count, int colorbase, int gravity, int randomvel)
 618 {
 619         int                     j;
 620         particle_t      *p;
 621         vec3_t          diff;
 622         float           t;
 623         if (!r_particles.value) return; // LordHavoc: particles are optional
 624         if (maxs[0] <= mins[0]) {t = mins[0];mins[0] = maxs[0];maxs[0] = t;}
 625         if (maxs[1] <= mins[1]) {t = mins[1];mins[1] = maxs[1];maxs[1] = t;}
 626         if (maxs[2] <= mins[2]) {t = mins[2];mins[2] = maxs[2];maxs[2] = t;}
 627
 628         VectorSubtract(maxs, mins, diff);
 629
 630         while (count--)
 631         {
 632                 ALLOCPARTICLE
 633
 634                 p->texnum = particletexture;
 635                 p->scale = 6;
 636                 p->alpha = 255;
 637                 p->die = cl.time + 1 + (rand()&15)*0.0625;
 638                 if (gravity)
 639                         p->type = pt_grav;
 640                 else
 641                         p->type = pt_static;
 642                 p->color = colorbase + (rand()&3);
 643                 for (j=0 ; j<3 ; j++)
 644                 {
 645                         p->org[j] = diff[j] * (float) (rand()&1023) * (1.0 / 1024.0) + mins[j];
 646                         if (randomvel)
 647                                 p->vel[j] = dir[j] + (rand()%randomvel)-(randomvel*0.5);
 648                         else
 649                                 p->vel[j] = 0;
 650                 }
 651         }
 652 }
 653
 654 void R_ParticleRain (vec3_t mins, vec3_t maxs, vec3_t dir, int count, int colorbase, int type)
 655 {
 656         int                     i;
 657         particle_t      *p;
 658         vec3_t          diff;
 659         vec3_t          org;
 660         vec3_t          vel;
 661         float           t, z;
 662         if (!r_particles.value) return; // LordHavoc: particles are optional
 663         if (maxs[0] <= mins[0]) {t = mins[0];mins[0] = maxs[0];maxs[0] = t;}
 664         if (maxs[1] <= mins[1]) {t = mins[1];mins[1] = maxs[1];maxs[1] = t;}
 665         if (maxs[2] <= mins[2]) {t = mins[2];mins[2] = maxs[2];maxs[2] = t;}
 666         if (dir[2] < 0) // falling
 667         {
 668                 t = (maxs[2] - mins[2]) / -dir[2];
 669                 z = maxs[2];
 670         }
 671         else // rising??
 672         {
 673                 t = (maxs[2] - mins[2]) / dir[2];
 674                 z = mins[2];
 675         }
 676         if (t < 0 || t > 2) // sanity check
 677                 t = 2;
 678         t += cl.time;
 679
 680         VectorSubtract(maxs, mins, diff);
 681
 682         for (i=0 ; i<count ; i++)
 683         {
 684                 ALLOCPARTICLE
 685
 686                 vel[0] = dir[0] + (rand()&31) - 16;
 687                 vel[1] = dir[1] + (rand()&31) - 16;
 688                 vel[2] = dir[2] + (rand()&63) - 32;
 689                 org[0] = diff[0] * (float) (rand()&1023) * (1.0 / 1024.0) + mins[0];
 690                 org[1] = diff[1] * (float) (rand()&1023) * (1.0 / 1024.0) + mins[1];
 691                 org[2] = z;
 692
 693                 p->alpha = 255;
 694                 p->die = t;
 695                 if (type == 1)
 696                 {
 697                         p->scale = 2;
 698                         p->texnum = particletexture;
 699                         p->type = pt_snow;
 700                 }
 701                 else // 0
 702                 {
 703                         p->scale = 3;
 704                         p->texnum = rainparticletexture;
 705                         p->type = pt_rain;
 706                 }
 707                 p->color = colorbase + (rand()&3);
 708                 VectorCopy(org, p->org);
 709                 VectorCopy(vel, p->vel);
 710                 VectorCopy(vel, p->vel2);
 711         }
 712 }
 713
 714
 715 /*
 716 ===============
 717 R_LavaSplash
 718
 719 ===============
 720 */
 721 void R_LavaSplash (vec3_t org)
 722 {
 723         int                     i, j;
 724         particle_t      *p;
 725         float           vel;
 726         vec3_t          dir;
 727         if (!r_particles.value) return; // LordHavoc: particles are optional
 728
 729         for (i=-128 ; i<128 ; i+=16)
 730                 for (j=-128 ; j<128 ; j+=16)
 731                 {
 732                         ALLOCPARTICLE
 733
 734                         p->texnum = particletexture;
 735                         p->scale = 10;
 736                         p->alpha = 128;
 737                         p->die = cl.time + 2 + (rand()&31) * 0.02;
 738                         p->color = 224 + (rand()&7);
 739                         p->type = pt_grav;
 740
 741                         dir[0] = j + (rand()&7);
 742                         dir[1] = i + (rand()&7);
 743                         dir[2] = 256;
 744
 745                         p->org[0] = org[0] + dir[0];
 746                         p->org[1] = org[1] + dir[1];
 747                         p->org[2] = org[2] + (rand()&63);
 748
 749                         VectorNormalize (dir);
 750                         vel = 50 + (rand()&63);
 751                         VectorScale (dir, vel, p->vel);
 752                 }
 753 }
 754
 755 /*
 756 ===============
 757 R_TeleportSplash
 758
 759 ===============
 760 */
 761 void R_TeleportSplash (vec3_t org)
 762 {
 763         int                     i, j, k;
 764         particle_t      *p;
 765         if (!r_particles.value) return; // LordHavoc: particles are optional
 766
 767         for (i=-16 ; i<16 ; i+=8)
 768                 for (j=-16 ; j<16 ; j+=8)
 769                         for (k=-24 ; k<32 ; k+=8)
 770                         {
 771                                 ALLOCPARTICLE
 772
 773                                 p->texnum = particletexture;
 774                                 p->scale = 1;
 775                                 p->alpha = lhrandom(32,128);
 776                                 p->die = cl.time + 5;
 777                                 p->color = 254;
 778                                 p->type = pt_fade;
 779
 780                                 p->org[0] = org[0] + i + (rand()&7);
 781                                 p->org[1] = org[1] + j + (rand()&7);
 782                                 p->org[2] = org[2] + k + (rand()&7);
 783
 784                                 p->vel[0] = i*2 + (rand()%25) - 12;
 785                                 p->vel[1] = j*2 + (rand()%25) - 12;
 786                                 p->vel[2] = k*2 + (rand()%25) - 12 + 40;
 787                         }
 788 }
 789
 790 void R_RocketTrail (vec3_t start, vec3_t end, int type, entity_t *ent)
 791 {
 792         vec3_t          vec;
 793         float           len, dec = 0, t, nt, speed;
 794         int                     j, contents, bubbles;
 795         particle_t      *p;
 796         if (!r_particles.value) return; // LordHavoc: particles are optional
 797
 798         t = cl.oldtime;
 799         nt = cl.time;
 800         if (ent->trail_leftover < 0)
 801                 ent->trail_leftover = 0;
 802         t += ent->trail_leftover;
 803         ent->trail_leftover -= (cl.time - cl.oldtime);
 804         if (t >= cl.time)
 805                 return;
 806
 807         contents = Mod_PointInLeaf(start, cl.worldmodel)->contents;
 808         if (contents == CONTENTS_SKY || contents == CONTENTS_LAVA)
 809                 return;
 810
 811         VectorSubtract (end, start, vec);
 812         len = VectorNormalizeLength (vec);
 813         if (len <= 0.01f)
 814                 return;
 815         speed = len / (nt - t);
 816
 817         bubbles = (contents == CONTENTS_WATER || contents == CONTENTS_SLIME);
 818
 819         while (t < nt)
 820         {
 821                 ALLOCPARTICLE
 822
 823                 p->vel[0] = p->vel[1] = p->vel[2] = 0;
 824                 p->die = cl.time + 2;
 825
 826                 switch (type)
 827                 {
 828                         case 0: // rocket trail
 829                         case 1: // grenade trail
 830                                 if (bubbles)
 831                                 {
 832                                         dec = 0.005f;
 833                                         p->texnum = bubbleparticletexture;
 834                                         p->scale = lhrandom(1,2);
 835                                         p->alpha = 255;
 836                                         p->color = (rand()&3)+12;
 837                                         p->type = pt_bubble;
 838                                         p->die = cl.time + 2;
 839                                         for (j=0 ; j<3 ; j++)
 840                                         {
 841                                                 p->vel[j] = (rand()&31)-16;
 842                                                 p->org[j] = start[j] + ((rand()&3)-2);
 843                                         }
 844                                 }
 845                                 else
 846                                 {
 847                                         dec = 0.02f;
 848                                         p->texnum = smokeparticletexture[rand()&7];
 849                                         p->scale = lhrandom(8, 12);
 850                                         p->alpha = 64 + (rand()&31);
 851                                         p->color = (rand()&3)+12;
 852                                         p->type = pt_smoke;
 853                                         p->die = cl.time + 10000;
 854                                         VectorCopy(start, p->org);
 855                                 }
 856                                 break;
 857
 858                                 /*
 859                         case 1: // smoke smoke
 860                                 dec = 0.016f;
 861                                 p->texnum = smokeparticletexture;
 862                                 p->scale = lhrandom(6,9);
 863                                 p->alpha = 64;
 864                                 if (r_smokecolor.value)
 865                                         p->color = r_smokecolor.value;
 866                                 else
 867                                         p->color = (rand()&3)+12;
 868                                 p->type = pt_smoke;
 869                                 p->die = cl.time + 1;
 870                                 VectorCopy(start, p->org);
 871                                 break;
 872                                 */
 873
 874                         case 2: // blood
 875                         case 4: // slight blood
 876                                 dec = 0.025f;
 877                                 p->texnum = smokeparticletexture[rand()&7];
 878                                 p->scale = lhrandom(4, 6);
 879                                 p->alpha = type == 4 ? 192 : 255;
 880                                 p->color = (rand()&3)+68;
 881                                 p->type = pt_bloodcloud;
 882                                 p->die = cl.time + 9999;
 883                                 for (j=0 ; j<3 ; j++)
 884                                 {
 885                                         p->vel[j] = (rand()&15)-8;
 886                                         p->org[j] = start[j] + ((rand()&3)-2);
 887                                 }
 888                                 break;
 889
 890                         case 3:
 891                         case 5: // tracer
 892                                 dec = 0.02f;
 893                                 p->texnum = smokeparticletexture[rand()&7];
 894                                 p->scale = 4;
 895                                 p->alpha = 64 + (rand()&31);
 896                                 p->color = type == 3 ? 56 : 234;
 897                                 p->type = pt_fade;
 898                                 p->die = cl.time + 10000;
 899                                 VectorCopy(start, p->org);
 900                                 break;
 901
 902                         case 6: // voor trail
 903                                 dec = 0.05f; // sparse trail
 904                                 p->texnum = smokeparticletexture[rand()&7];
 905                                 p->scale = lhrandom(3, 5);
 906                                 p->alpha = 255;
 907                                 p->color = 9*16 + 8 + (rand()&3);
 908                                 p->type = pt_fade;
 909                                 p->die = cl.time + 2;
 910                                 for (j=0 ; j<3 ; j++)
 911                                 {
 912                                         p->vel[j] = (rand()&15)-8;
 913                                         p->org[j] = start[j] + ((rand()&3)-2);
 914                                 }
 915                                 break;
 916
 917                         case 7: // Nehahra smoke tracer
 918                                 dec = 0.14f;
 919                                 p->texnum = smokeparticletexture[rand()&7];
 920                                 p->scale = lhrandom(8, 12);
 921                                 p->alpha = 64;
 922                                 p->color = (rand()&3)+12;
 923                                 p->type = pt_smoke;
 924                                 p->die = cl.time + 10000;
 925                                 for (j=0 ; j<3 ; j++)
 926                                         p->org[j] = start[j] + ((rand()&3)-2);
 927                                 break;
 928                 }
 929
 930                 t += dec;
 931                 dec *= speed;
 932                 VectorMA (start, dec, vec, start);
 933         }
 934         ent->trail_leftover = t - cl.time;
 935 }
 936
 937 void R_RocketTrail2 (vec3_t start, vec3_t end, int color, entity_t *ent)
 938 {
 939         vec3_t          vec;
 940         int                     len;
 941         if (!r_particles.value) return; // LordHavoc: particles are optional
 942
 943         VectorSubtract (end, start, vec);
 944         len = (int) (VectorNormalizeLength (vec) * (1.0f / 3.0f));
 945         VectorScale(vec, 3, vec);
 946         while (len--)
 947         {
 948                 particle(pt_smoke, color, particletexture, 8, 192, 99, start[0], start[1], start[2], 0, 0, 0);
 949                 VectorAdd (start, vec, start);
 950         }
 951 }
 952
 953
 954 /*
 955 ===============
 956 R_DrawParticles
 957 ===============
 958 */
 959 extern  cvar_t  sv_gravity;
 960 void R_CompleteLightPoint (vec3_t color, vec3_t p);
 961
 962 void TraceLine (vec3_t start, vec3_t end, vec3_t impact);
 963
 964 void R_DrawParticles (void)
 965 {
 966         particle_t              *p;
 967         int                             i, r,g,b,a;
 968         float                   gravity, dvel, frametime, scale, scale2, minparticledist;
 969         byte                    *color24;
 970         vec3_t                  up, right, uprightangles, forward2, up2, right2, tempcolor, v;
 971         int                             activeparticles, maxparticle, j, k;
 972
 973         // LordHavoc: early out condition
 974         if (!numparticles)
 975                 return;
 976
 977         VectorScale (vup, 1.5, up);
 978         VectorScale (vright, 1.5, right);
 979
 980         uprightangles[0] = 0;
 981         uprightangles[1] = r_refdef.viewangles[1];
 982         uprightangles[2] = 0;
 983         AngleVectors (uprightangles, forward2, right2, up2);
 984
 985         frametime = cl.time - cl.oldtime;
 986         gravity = frametime * sv_gravity.value;
 987         dvel = 1+4*frametime;
 988
 989         minparticledist = DotProduct(r_refdef.vieworg, vpn) + 16.0f;
 990
 991         activeparticles = 0;
 992         maxparticle = -1;
 993         j = 0;
 994         for (k = 0, p = particles;k < numparticles;k++, p++)
 995         {
 996                 if (p->die < cl.time)
 997                 {
 998                         freeparticles[j++] = p;
 999                         continue;
1000                 }
1001                 maxparticle = k;
1002                 activeparticles++;
1003
1004                 // LordHavoc: only render if not too close
1005                 if (DotProduct(p->org, vpn) >= minparticledist)
1006                 {
1007                         color24 = (byte *) &d_8to24table[(int)p->color];
1008                         r = color24[0];
1009                         g = color24[1];
1010                         b = color24[2];
1011                         a = p->alpha;
1012                         if (r_dynamicparticles.value)
1013                         {
1014                                 R_CompleteLightPoint(tempcolor, p->org);
1015                                 r = (r * (int) tempcolor[0]) >> 7;
1016                                 g = (g * (int) tempcolor[1]) >> 7;
1017                                 b = (b * (int) tempcolor[2]) >> 7;
1018                         }
1019                         transpolybegin(p->texnum, 0, p->texnum, TPOLYTYPE_ALPHA);
1020                         scale = p->scale * -0.5;scale2 = p->scale * 0.5;
1021                         if (p->texnum == rainparticletexture) // rain streak
1022                         {
1023                                 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);
1024                                 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);
1025                                 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);
1026                                 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);
1027                         }
1028                         else
1029                         {
1030                                 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);
1031                                 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);
1032                                 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);
1033                                 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);
1034                         }
1035                         transpolyend();
1036                 }
1037
1038                 VectorCopy(p->org, p->oldorg);
1039                 p->org[0] += p->vel[0]*frametime;
1040                 p->org[1] += p->vel[1]*frametime;
1041                 p->org[2] += p->vel[2]*frametime;
1042
1043                 switch (p->type)
1044                 {
1045                 case pt_static:
1046                         break;
1047
1048                 case pt_blob:
1049                         for (i=0 ; i<3 ; i++)
1050                                 p->vel[i] *= dvel;
1051                         break;
1052
1053                 case pt_blob2:
1054                         for (i=0 ; i<2 ; i++)
1055                                 p->vel[i] *= dvel;
1056                         break;
1057
1058                 case pt_grav:
1059                         p->vel[2] -= gravity;
1060                         break;
1061 // LordHavoc: for smoke trails
1062                 case pt_smoke:
1063                         p->scale += frametime * 6;
1064                         p->alpha -= frametime * 128;
1065                         if (p->alpha < 1)
1066                                 p->die = -1;
1067                         break;
1068                 case pt_snow:
1069                         if (cl.time > p->time2)
1070                         {
1071                                 p->time2 = cl.time + (rand() & 3) * 0.1;
1072                                 p->vel[0] = (rand()&63)-32 + p->vel2[0];
1073                                 p->vel[1] = (rand()&63)-32 + p->vel2[1];
1074                                 p->vel[2] = (rand()&63)-32 + p->vel2[2];
1075                         }
1076                         break;
1077                 case pt_bloodcloud:
1078 //                      if (Mod_PointInLeaf(p->org, cl.worldmodel)->contents != CONTENTS_EMPTY)
1079 //                      {
1080 //                              p->die = -1;
1081 //                              break;
1082 //                      }
1083                         p->scale += frametime * 16;
1084                         p->alpha -= frametime * 512;
1085                         if (p->alpha < 1 || p->scale < 1)
1086                                 p->die = -1;
1087                         break;
1088                 case pt_fallfadespark:
1089                         p->alpha -= frametime * 256;
1090                         p->vel[2] -= gravity;
1091                         if (p->alpha < 1)
1092                                 p->die = -1;
1093                         break;
1094                 case pt_fade:
1095                         p->alpha -= frametime * 512;
1096                         if (p->alpha < 1)
1097                                 p->die = -1;
1098                         break;
1099                 case pt_bubble:
1100                         a = Mod_PointInLeaf(p->org, cl.worldmodel)->contents;
1101                         if (a != CONTENTS_WATER && a != CONTENTS_SLIME)
1102                         {
1103                                 p->texnum = smokeparticletexture[rand()&7];
1104                                 p->type = pt_splash;
1105                                 p->alpha = 96;
1106                                 p->scale = 5;
1107                                 p->vel[0] = p->vel[1] = p->vel[2] = 0;
1108                                 p->die = cl.time + 1000;
1109 //                              p->die = -1;
1110                         }
1111                         p->vel[2] += gravity * 0.25;
1112                         p->vel[0] *= (1 - (frametime * 0.0625));
1113                         p->vel[1] *= (1 - (frametime * 0.0625));
1114                         p->vel[2] *= (1 - (frametime * 0.0625));
1115                         if (cl.time > p->time2)
1116                         {
1117                                 p->time2 = cl.time + lhrandom(0, 0.5);
1118                                 p->vel[0] += lhrandom(-32,32);
1119                                 p->vel[1] += lhrandom(-32,32);
1120                                 p->vel[2] += lhrandom(-32,32);
1121                         }
1122                         p->alpha -= frametime * 64;
1123                         if (p->alpha < 1)
1124                                 p->die = -1;
1125                         break;
1126                 case pt_smokecloud:
1127                         p->scale += frametime * 60;
1128                         p->alpha -= frametime * 96;
1129                         if (p->alpha < 1)
1130                                 p->die = -1;
1131                         break;
1132                 case pt_splash:
1133                         p->scale += frametime * 24;
1134                         p->alpha -= frametime * 256;
1135                         if (p->alpha < 1)
1136                                 p->die = -1;
1137                         break;
1138                 case pt_rain:
1139                         a = Mod_PointInLeaf(p->org, cl.worldmodel)->contents;
1140                         if (a != CONTENTS_EMPTY && a != CONTENTS_SKY)
1141                         {
1142                                 if (a == CONTENTS_SOLID && Mod_PointInLeaf(p->oldorg, cl.worldmodel)->contents == CONTENTS_SOLID)
1143                                         break; // still in solid
1144                                 p->die = cl.time + 1000;
1145                                 switch (a)
1146                                 {
1147                                 case CONTENTS_LAVA:
1148                                 case CONTENTS_SLIME:
1149                                         p->texnum = smokeparticletexture[rand()&7];
1150                                         p->type = pt_smokecloud;
1151                                         p->alpha = 64;
1152                                         p->vel[2] = 96;
1153                                         break;
1154                                 case CONTENTS_WATER:
1155                                         p->texnum = smokeparticletexture[rand()&7];
1156                                         p->type = pt_splash;
1157                                         p->alpha = 96;
1158                                         p->scale = 5;
1159                                         p->vel[0] = p->vel[1] = p->vel[2] = 0;
1160 //                                      p->texnum = bubbleparticletexture;
1161 //                                      p->type = pt_bubble;
1162 //                                      p->vel[2] *= 0.1;
1163                                         break;
1164                                 default: // CONTENTS_SOLID and any others
1165                                         TraceLine(p->oldorg, p->org, v);
1166                                         VectorCopy(v, p->org);
1167                                         p->texnum = smokeparticletexture[rand()&7];
1168                                         p->type = pt_splash;
1169                                         p->alpha = 96;
1170                                         p->scale = 5;
1171                                         p->vel[0] = p->vel[1] = p->vel[2] = 0;
1172                                         p->die = cl.time + 1000;
1173                                         break;
1174                                 }
1175                         }
1176                         break;
1177                 }
1178         }
1179         // fill in gaps to compact the array
1180         i = 0;
1181         while (maxparticle >= activeparticles)
1182         {
1183                 *freeparticles[i++] = particles[maxparticle--];
1184                 while (maxparticle >= activeparticles && particles[maxparticle].die < cl.time)
1185                         maxparticle--;
1186         }
1187         numparticles = activeparticles;
1188 }
1189