/* * Copyright (C) Volition, Inc. 1999. All rights reserved. * * All source code herein is the property of Volition, Inc. You may not sell * or otherwise commercially exploit the source or things you created based on the * source. * */ /* * $Logfile: /Freespace2/code/Particle/Particle.cpp $ * $Revision: 2.14 $ * $Date: 2005-06-19 09:00:09 $ * $Author: taylor $ * * Code for particle system * * $Log: not supported by cvs2svn $ * Revision 2.13 2005/04/05 05:53:23 taylor * s/vector/vec3d/g, better support for different compilers (Jens Granseuer) * * Revision 2.12 2005/03/24 23:37:25 taylor * fix GCC building * * Revision 2.11 2005/03/16 01:35:59 bobboau * added a geometry batcher and implemented it in sevral places * namely: lasers, thrusters, and particles, * these have been the primary botle necks for some time, * and this seems to have smoothed them out quite a bit. * * Revision 2.10 2005/02/04 20:06:06 taylor * merge with Linux/OSX tree - p0204-2 * * Revision 2.9 2004/11/21 11:33:23 taylor * page in all frames at once rather than separately (old code that wasn't updated) * * Revision 2.8 2004/07/26 20:47:47 Kazan * remove MCD complete * * Revision 2.7 2004/07/12 16:33:02 Kazan * MCD - define _MCD_CHECK to use memory tracking * * Revision 2.6 2004/03/21 09:41:54 randomtiger * Fixed a bug that was causing windowed movie playback and a crash. * Added some batching redirection. * * Revision 2.5 2004/03/20 14:47:13 randomtiger * Added base for a general dynamic batching solution. * Fixed NO_DSHOW_CODE code path bug. * * Revision 2.4 2004/03/05 09:02:09 Goober5000 * Uber pass at reducing #includes * --Goober5000 * * Revision 2.3 2004/01/24 14:31:27 randomtiger * Added the D3D particle code, its not bugfree but works perfectly on my card and helps with the framerate. * Its optional and off by default, use -d3d_particle to activiate. * Also bumped up D3D ambient light setting, it was way too dark. * Its now set to something similar to the original game. * * Revision 2.2 2003/10/23 18:03:24 randomtiger * Bobs changes (take 2) * * Revision 2.1 2002/08/01 01:41:09 penguin * The big include file move * * Revision 2.0 2002/06/03 04:02:27 penguin * Warpcore CVS sync * * Revision 1.2 2002/05/04 04:52:22 mharris * 1st draft at porting * * Revision 1.1 2002/05/02 18:03:12 mharris * Initial checkin - converted filenames and includes to lower case * * * 11 7/21/99 8:10p Dave * First run of supernova effect. * * 10 7/15/99 9:20a Andsager * FS2_DEMO initial checkin * * 9 7/07/99 3:11p Dave * Fix for uninitialized particle system data. * * 8 4/22/99 11:06p Dave * Final pass at beam weapons. Solidified a lot of stuff. All that remains * now is to tweak and fix bugs as they come up. No new beam weapon * features. * * 7 1/29/99 12:47a Dave * Put in sounds for beam weapon. A bunch of interface screens (tech * database stuff). * * 6 1/28/99 9:10a Andsager * Particles increased in width, life, number. Max particles increased * * 5 1/27/99 9:56a Dave * Temporary checkin of beam weapons for Dan to make cool sounds. * * 4 1/24/99 11:37p Dave * First full rev of beam weapons. Very customizable. Removed some bogus * Int3()'s in low level net code. * * 3 1/21/99 2:06p Dave * Final checkin for multiplayer testing. * * 2 10/07/98 10:53a Dave * Initial checkin. * * 1 10/07/98 10:50a Dave * * 28 5/13/98 3:25p John * Added code to make explosion impacts not get removed by other * particles. * * 27 5/11/98 10:06a John * Added new particle for Adam * * 26 4/30/98 11:31a Andsager * Added particles to big ship explosions. Modified particle_emit() to * take optional range to increase range at which pariticles are created. * * 25 4/17/98 1:42p Allender * fixed NDEBUG build problems * * 24 4/17/98 6:58a John * Made particles not reduce in low mem conditions. * * 23 4/15/98 4:21p John * Made particles drop off with distance smoothly. Made old particles get * deleted by new ones. * * 22 4/15/98 11:15a Adam * upped MAX_PARTICLES to 1500 (from 800). Primary weapon hit sparks were * not finding slots. * * 21 4/12/98 10:24a John * Made particle drop off distance larger for larger detail levels. * * 20 4/09/98 7:58p John * Cleaned up tmapper code a bit. Put NDEBUG around some ndebug stuff. * Took out XPARENT flag settings in all the alpha-blended texture stuff. * * 19 4/02/98 11:40a Lawrance * check for #ifdef DEMO instead of #ifdef DEMO_RELEASE * * 18 4/01/98 9:21p John * Made NDEBUG, optimized build with no warnings or errors. * * 17 4/01/98 10:57a Mike * Reduce array sizes to save memory. * * 16 3/31/98 5:18p John * Removed demo/save/restore. Made NDEBUG defined compile. Removed a * bunch of debug stuff out of player file. Made model code be able to * unload models and malloc out only however many models are needed. * * * 15 3/30/98 4:02p John * Made machines with < 32 MB of RAM use every other frame of certain * bitmaps. Put in code to keep track of how much RAM we've malloc'd. * * 14 3/26/98 5:26p John * added new paging code. nonfunctional. * * 13 3/22/98 11:02a John * Made a bunch of the detail levels actually do something * * 12 2/13/98 5:01p John * Made particles behind you not render * * 11 2/06/98 7:28p John * Made debris and particles not get created if > 200 m from eye. Added * max_velocity to asteroid's physics info for aiding in throwing out * collision pairs. * * 10 2/05/98 9:21p John * Some new Direct3D code. Added code to monitor a ton of stuff in the * game. * * 9 1/29/98 11:48a John * Added new counter measure rendering as model code. Made weapons be * able to have impact explosion. * * 8 1/26/98 5:10p John * Took particle use out of registry. * * 7 1/23/98 5:08p John * Took L out of vertex structure used B (blue) instead. Took all small * fireballs out of fireball types and used particles instead. Fixed some * debris explosion things. Restructured fireball code. Restructured * some lighting code. Made dynamic lighting on by default. Made groups * of lasers only cast one light. Made fireballs not cast light. * * 6 1/13/98 8:09p John * Removed the old collision system that checked all pairs. Added code * to disable collisions and particles. * * 5 1/02/98 5:04p John * Several explosion related changes. Made fireballs not be used as * ani's. Made ship spark system expell particles. Took away impact * explosion for weapon hitting ship... this needs to get added to weapon * info and makes shield hit more obvious. Only make sparks when hit * hull, not shields. * * 4 12/30/97 6:44p John * Made g3_Draw_bitmap functions account for aspect of bitmap. * * 3 12/26/97 5:42p Adam * * 2 12/23/97 3:58p John * Second rev of particles * * 1 12/23/97 8:26a John * * $NoKeywords: $ */ #include "globalincs/systemvars.h" #include "graphics/2d.h" #include "render/3d.h" #include "bmpman/bmpman.h" #include "particle/particle.h" #include "object/object.h" #include "cmdline/cmdline.h" #ifndef NDEBUG #include "io/timer.h" #endif #include "cmdline/cmdline.h" #include "graphics/grbatch.h" typedef struct particle { // old style data vec3d pos; // position vec3d velocity; // velocity float age; // How long it's been alive float max_life; // How much life we had float radius; // radius int type; // type // -1 = None uint optional_data; // depends on type int nframes; // If an ani, how many frames? // new style data float tracer_length; // if this is set, draw as a rod to simulate a "tracer" effect short attached_objnum; // if this is set, pos is relative to the attached object. velocity is ignored int attached_sig; // to check for dead/nonexistent objects ubyte reverse; // play any animations in reverse } particle; int Num_particles = 0; particle Particles[MAX_PARTICLES]; int Next_particle = 0; int Anim_bitmap_id_fire = -1; int Anim_num_frames_fire = -1; int Anim_bitmap_id_smoke = -1; int Anim_num_frames_smoke = -1; int Anim_bitmap_id_smoke2 = -1; int Anim_num_frames_smoke2 = -1; static int Particles_enabled = 1; geometry_batcher *PARTICLE_FIRE_batcher = NULL; geometry_batcher *PARTICLE_SMOKE_batcher = NULL; geometry_batcher *PARTICLE_SMOKE2_batcher = NULL; // Reset everything between levels void particle_init() { int i, fps; // Particles_enabled = os_config_read_uint( NULL, "UseParticles", 0 ); Num_particles = 0; Next_particle = 0; for (i=0; i -1) && (PARTICLE_FIRE_batcher == NULL) ) { Assert( Anim_num_frames_fire > 0 ); PARTICLE_FIRE_batcher = new geometry_batcher[Anim_num_frames_fire]; Verify( PARTICLE_FIRE_batcher != NULL ); } // Cough, cough if ( Anim_bitmap_id_smoke == -1 ) { Anim_bitmap_id_smoke = bm_load_animation( "particlesmoke01", &Anim_num_frames_smoke, &fps, 0 ); } if ( (Anim_bitmap_id_smoke > -1) && (PARTICLE_SMOKE_batcher == NULL) ) { Assert( Anim_num_frames_smoke > 0 ); PARTICLE_SMOKE_batcher = new geometry_batcher[Anim_num_frames_smoke]; Verify( PARTICLE_SMOKE_batcher != NULL ); } // wheeze if ( Anim_bitmap_id_smoke2 == -1 ) { Anim_bitmap_id_smoke2 = bm_load_animation( "particlesmoke02", &Anim_num_frames_smoke2, &fps, 0 ); } if ( (Anim_bitmap_id_smoke2 > -1) && (PARTICLE_SMOKE2_batcher == NULL) ) { Assert( Anim_num_frames_smoke2 > 0 ); PARTICLE_SMOKE2_batcher = new geometry_batcher[Anim_num_frames_smoke2]; Verify( PARTICLE_SMOKE2_batcher != NULL ); } } // only call from game_shutdown()!!! void particle_close() { if ( PARTICLE_FIRE_batcher != NULL ) { delete[] PARTICLE_FIRE_batcher; PARTICLE_FIRE_batcher = NULL; } if ( PARTICLE_SMOKE_batcher != NULL ) { delete[] PARTICLE_SMOKE_batcher; PARTICLE_SMOKE_batcher = NULL; } if ( PARTICLE_SMOKE2_batcher != NULL ) { delete[] PARTICLE_SMOKE2_batcher; PARTICLE_SMOKE2_batcher = NULL; } } void particle_page_in() { int i; for (i=0; i -1) { bm_page_in_texture( Anim_bitmap_id_fire, Anim_num_frames_fire ); } if (Anim_bitmap_id_smoke > -1) { bm_page_in_texture( Anim_bitmap_id_smoke, Anim_num_frames_smoke ); } if (Anim_bitmap_id_smoke2 > -1) { bm_page_in_texture( Anim_bitmap_id_smoke2, Anim_num_frames_smoke2 ); } } DCF(particles,"Turns particles on/off") { if ( Dc_command ) { dc_get_arg(ARG_TRUE|ARG_FALSE|ARG_NONE); if ( Dc_arg_type & ARG_TRUE ) Particles_enabled = 1; else if ( Dc_arg_type & ARG_FALSE ) Particles_enabled = 0; else if ( Dc_arg_type & ARG_NONE ) Particles_enabled ^= 1; } if ( Dc_help ) dc_printf( "Usage: particles [bool]\nTurns particle system on/off. If nothing passed, then toggles it.\n" ); if ( Dc_status ) dc_printf( "particles are %s\n", (Particles_enabled?"ON":"OFF") ); // os_config_write_uint( NULL, "UseParticles", Particles_enabled ); } int Num_particles_hwm = 0; #ifndef NDEBUG int Total_requested = 0; int Total_killed = 0; int next_message = -1; #endif // Creates a single particle. See the PARTICLE_?? defines for types. void particle_create( particle_info *pinfo ) { int particle_num; particle *p; #ifndef NDEBUG if ( next_message == -1 ) { next_message = timestamp(10000); } if ( timestamp_elapsed(next_message)) { next_message = timestamp(10000); if ( Total_requested > 1 ) { nprintf(( "Particles", "Particles: Killed off %d%% of the particles\n", (Total_killed*100/Total_requested) )); } Total_requested = 0; Total_killed = 0; } #endif if ( !Particles_enabled ) return; #ifndef NDEBUG Total_requested++; #endif int RetryCount = 0; int FirstParticleFound = Next_particle; KillAnother: p = &Particles[Next_particle++]; if ( Next_particle >= MAX_PARTICLES ) { Next_particle = 0; } if ( p->type > -1 ) { // Only remove non-persistent ones if ( p->type != PARTICLE_BITMAP_PERSISTENT ) { p->type = -1; Num_particles--; #ifndef NDEBUG Total_killed++; #endif } else { RetryCount++; // Keep trying to find a non-persistent one until we searched through 1/3 the slots. if ( RetryCount < MAX_PARTICLES/3 ) { goto KillAnother; } // Couldn't find any non-persistent ones to remove, so just remove the // first one we would have removed. mprintf(( "DELETING A PERSISTENT PARTICLE!!! This is ok if this only happens rarely. Get John if not.\n" )); Next_particle = FirstParticleFound; p = &Particles[Next_particle++]; if ( Next_particle >= MAX_PARTICLES ) { Next_particle = 0; } } } // increment counter Num_particles++; if (Num_particles > Num_particles_hwm) { Num_particles_hwm = Num_particles; if ( Num_particles_hwm == MAX_PARTICLES ) { mprintf(( "All particle slots filled!\n" )); } //mprintf(( "Num_particles high water mark = %i\n", Num_particles_hwm)); } // get objnum particle_num = p-Particles; // Init the particle data p->pos = pinfo->pos; p->velocity = pinfo->vel; p->age = 0.0f; p->max_life = pinfo->lifetime; p->radius = pinfo->rad; p->type = pinfo->type; p->optional_data = pinfo->optional_data; p->tracer_length = pinfo->tracer_length; p->attached_objnum = pinfo->attached_objnum; p->attached_sig = pinfo->attached_sig; p->reverse = pinfo->reverse; if ( (p->type == PARTICLE_BITMAP) || (p->type == PARTICLE_BITMAP_PERSISTENT) ) { int fps; bm_get_info( p->optional_data,NULL, NULL, NULL, &p->nframes, &fps ); if ( p->nframes > 1 ) { // Recalculate max life for ani's p->max_life = i2fl(p->nframes) / i2fl(fps); } } else { p->nframes = 1; } } void particle_create( vec3d *pos, vec3d *vel, float lifetime, float rad, int type, uint optional_data ) { particle_info pinfo; // setup old data pinfo.pos = *pos; pinfo.vel = *vel; pinfo.lifetime = lifetime; pinfo.rad = rad; pinfo.type = type; pinfo.optional_data = optional_data; // setup new data pinfo.tracer_length = -1.0f; pinfo.attached_objnum = -1; pinfo.attached_sig = -1; pinfo.reverse = 0; // lower level function particle_create(&pinfo); } MONITOR( NumParticles ); void particle_move_all(float frametime) { particle *p; MONITOR_INC( NumParticles, Num_particles ); if ( !Particles_enabled ) return; p = Particles; int i; for ( i=0; itype == -1 ) { continue; } // bogus attached objnum if(p->attached_objnum >= MAX_OBJECTS){ p->type = -1; // decrement counter Num_particles--; Assert(Num_particles >= 0); continue; } // if the vector is attached to an object which has become invalid, kill if if(p->attached_objnum >= 0){ // if the signature has changed, kill it if(p->attached_sig != Objects[p->attached_objnum].signature){ p->type = -1; // decrement counter Num_particles--; Assert(Num_particles >= 0); continue; } } // move as a regular particle else { // Move the particle vm_vec_scale_add2( &p->pos, &p->velocity, frametime ); } p->age += frametime; if ( p->age > p->max_life ) { // If it's time expired, remove it from the used list and // into the free list p->type = -1; // decrement counter Num_particles--; Assert(Num_particles >= 0); } } } // kill all active particles void particle_kill_all() { int idx; // kill all active particles Num_particles = 0; Next_particle = 0; Num_particles_hwm = 0; for(idx=0; idxtype == -1 ) { continue; } n++; // pct complete for the particle pct_complete = p->age / p->max_life; // calculate the alpha to draw at alpha = 1.0f; vertex POS; // if this is a tracer style particle, calculate tracer vectors if(p->tracer_length > 0.0f){ ts = p->pos; temp = p->velocity; vm_vec_normalize_quick(&temp); vm_vec_scale_add(&te, &ts, &temp, p->tracer_length); // don't bother rotating rotate = 0; } // if this is an "attached" particle. move it else if(p->attached_objnum >= 0){ // offset the vector, and transform to view coords // vm_vec_add(&te, &Objects[p->attached_objnum].pos, &p->pos); vm_vec_unrotate(&temp, &p->pos, &Objects[p->attached_objnum].orient); vm_vec_add2(&temp, &Objects[p->attached_objnum].pos); if(!Cmdline_nohtl)g3_transfer_vertex(&POS, &temp); flags = g3_rotate_vertex(&pos, &temp); if(flags){ nclipped++; continue; } // don't bother rotating again rotate = 0; } // rotate the vertex if(rotate){ if(!Cmdline_nohtl)g3_transfer_vertex(&POS, &p->pos); flags = g3_rotate_vertex( &pos, &p->pos ); if ( flags ) { nclipped++; continue; } } switch( p->type ) { case PARTICLE_DEBUG: // A red sphere, no optional data required gr_set_color( 255, 0, 0 ); g3_draw_sphere_ez( &p->pos, p->radius ); break; case PARTICLE_BITMAP: case PARTICLE_BITMAP_PERSISTENT: { // A bitmap, optional data is the bitmap number int framenum = p->optional_data; if ( p->nframes > 1 ) { int n = fl2i(pct_complete * p->nframes + 0.5); if ( n < 0 ) n = 0; else if ( n > p->nframes-1 ) n = p->nframes-1; framenum += n; } // set the bitmap gr_set_bitmap( framenum, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, alpha ); // if this is a tracer style particle if(p->tracer_length > 0.0f){ g3_draw_laser(&ts, p->radius, &te, p->radius, TMAP_FLAG_TEXTURED|TMAP_FLAG_XPARENT|TMAP_HTL_3DU_BATCH, 25.0f); } // draw as a regular bitmap else { if(!Cmdline_nohtl)g3_draw_bitmap(&POS, (p-Particles)%8, p->radius, TMAP_FLAG_TEXTURED | TMAP_HTL_3D_UNLIT | TMAP_HTL_PARTICLE | TMAP_HTL_3DU_BATCH); else g3_draw_bitmap(&pos, (p-Particles)%8, p->radius, TMAP_FLAG_TEXTURED ); } break; } case PARTICLE_FIRE: { if ( Anim_bitmap_id_fire == -1 ) break; int framenum = fl2i(pct_complete * Anim_num_frames_fire + 0.5); if ( framenum < 0 ) framenum = 0; else if ( framenum > Anim_num_frames_fire-1 ) framenum = Anim_num_frames_fire-1; /* vertex pos; flags = g3_rotate_vertex( &pos, &p->pos ); if ( flags ) { nclipped++; break; } */ /* // set the bitmap gr_set_bitmap(p->reverse ? Anim_bitmap_id_fire+(Anim_num_frames_fire - framenum - 1) : Anim_bitmap_id_fire+framenum, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, alpha ); // if this is a tracer style particle if(p->tracer_length > 0.0f){ g3_draw_laser(&ts, p->radius, &te, p->radius, TMAP_FLAG_TEXTURED|TMAP_FLAG_XPARENT|TMAP_HTL_3DU_BATCH, 25.0f); } // draw as a regular bitmap else { if(!Cmdline_nohtl)g3_draw_bitmap(&POS, (p-Particles)%8, p->radius, TMAP_FLAG_TEXTURED | TMAP_HTL_3D_UNLIT | TMAP_HTL_PARTICLE|TMAP_HTL_3DU_BATCH); else g3_draw_bitmap(&pos, (p-Particles)%8, p->radius, TMAP_FLAG_TEXTURED ); } */ int cur_frame = p->reverse ? (Anim_num_frames_fire - framenum - 1) : framenum; Assert(cur_frame < Anim_num_frames_fire); PARTICLE_FIRE_batcher[cur_frame].add_allocate(1); // if this is a tracer style particle if(p->tracer_length > 0.0f){ PARTICLE_FIRE_batcher[cur_frame].draw_laser(&ts, p->radius, &te, p->radius, 255,255,255); } // draw as a regular bitmap else { PARTICLE_FIRE_batcher[cur_frame].draw_bitmap(&POS, p->radius); } break; } case PARTICLE_SMOKE: { if ( Anim_bitmap_id_smoke == -1 ) break; int framenum = fl2i(pct_complete * Anim_num_frames_smoke + 0.5); if ( framenum < 0 ) framenum = 0; else if ( framenum > Anim_num_frames_smoke-1 ) framenum = Anim_num_frames_smoke-1; /* vertex pos; flags = g3_rotate_vertex( &pos, &p->pos ); if ( flags ) { nclipped++; break; } */ // set the bitmap /*gr_set_bitmap(p->reverse ? Anim_bitmap_id_smoke+(Anim_num_frames_smoke - framenum - 1) : Anim_bitmap_id_smoke+framenum, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, alpha ); // if this is a tracer style particle if(p->tracer_length > 0.0f){ g3_draw_laser(&ts, p->radius, &te, p->radius, TMAP_FLAG_TEXTURED|TMAP_FLAG_XPARENT|TMAP_HTL_3DU_BATCH, 25.0f); } // draw as a regular bitmap else { if(!Cmdline_nohtl)g3_draw_bitmap(&POS, (p-Particles)%8, p->radius, TMAP_FLAG_TEXTURED | TMAP_HTL_3D_UNLIT | TMAP_HTL_PARTICLE|TMAP_HTL_3DU_BATCH); else g3_draw_bitmap(&pos, (p-Particles)%8, p->radius, TMAP_FLAG_TEXTURED ); } */ int cur_frame = p->reverse ? (Anim_num_frames_smoke - framenum - 1) : framenum; Assert(cur_frame < Anim_num_frames_smoke); PARTICLE_SMOKE_batcher[cur_frame].add_allocate(1); // if this is a tracer style particle if(p->tracer_length > 0.0f){ PARTICLE_SMOKE_batcher[cur_frame].draw_laser(&ts, p->radius, &te, p->radius, 255,255,255); } // draw as a regular bitmap else { PARTICLE_SMOKE_batcher[cur_frame].draw_bitmap(&POS, p->radius); } break; } case PARTICLE_SMOKE2: { if ( Anim_bitmap_id_smoke2 == -1 ) break; int framenum = fl2i(pct_complete * Anim_num_frames_smoke2 + 0.5); if ( framenum < 0 ) framenum = 0; else if ( framenum > Anim_num_frames_smoke2-1 ) framenum = Anim_num_frames_smoke2-1; /* vertex pos; flags = g3_rotate_vertex( &pos, &p->pos ); if ( flags ) { nclipped++; break; } */ // set the bitmap /* gr_set_bitmap(p->reverse ? Anim_bitmap_id_smoke2+(Anim_num_frames_smoke2 - framenum - 1) : Anim_bitmap_id_smoke2+framenum, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, alpha ); // if this is a tracer style particle if(p->tracer_length > 0.0f){ g3_draw_laser(&ts, p->radius, &te, p->radius, TMAP_FLAG_TEXTURED|TMAP_FLAG_XPARENT|TMAP_HTL_3DU_BATCH, 25.0f); } // draw as a regular bitmap else { if(!Cmdline_nohtl)g3_draw_bitmap(&POS, (p-Particles)%8, p->radius, TMAP_FLAG_TEXTURED | TMAP_HTL_3D_UNLIT | TMAP_HTL_PARTICLE|TMAP_HTL_3DU_BATCH); else g3_draw_bitmap(&pos, (p-Particles)%8, p->radius, TMAP_FLAG_TEXTURED ); } */ int cur_frame = p->reverse ? (Anim_num_frames_smoke2 - framenum - 1) : framenum; Assert(cur_frame < Anim_num_frames_smoke2); PARTICLE_SMOKE2_batcher[cur_frame].add_allocate(1); // if this is a tracer style particle if(p->tracer_length > 0.0f){ PARTICLE_SMOKE2_batcher[cur_frame].draw_laser(&ts, p->radius, &te, p->radius, 255,255,255); } // draw as a regular bitmap else { PARTICLE_SMOKE2_batcher[cur_frame].draw_bitmap(&POS, p->radius); } break; } } } for (i = 0; ipos, &Eye_position ) / range; if ( dist > min_dist ) { percent = fl2i( i2fl(percent)*min_dist / dist ); if ( percent < 1 ) { return; } } //mprintf(( "Dist = %.1f, percent = %d%%\n", dist, percent )); n1 = (pe->num_low*percent)/100; n2 = (pe->num_high*percent)/100; // How many to emit? n = (rand() % (n2-n1+1)) + n1; if ( n < 1 ) return; for (i=0; imax_rad - pe->min_rad ) * frand()) + pe->min_rad; float speed = (( pe->max_vel - pe->min_vel ) * frand()) + pe->min_vel; float life = (( pe->max_life - pe->min_life ) * frand()) + pe->min_life; normal.xyz.x = pe->normal.xyz.x + (frand()*2.0f - 1.0f)*pe->normal_variance; normal.xyz.y = pe->normal.xyz.y + (frand()*2.0f - 1.0f)*pe->normal_variance; normal.xyz.z = pe->normal.xyz.z + (frand()*2.0f - 1.0f)*pe->normal_variance; vm_vec_normalize_safe( &normal ); vm_vec_scale_add( &tmp_vel, &pe->vel, &normal, speed ); particle_create( &pe->pos, &tmp_vel, life, radius, type, optional_data ); } }