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fs2open.github.com/code/particle/particle.cpp
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wmcoolmon fb94960327 WMC codebase commit. See pre-commit build thread for details on changes. 
git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@3821 387891d4-d844-0410-90c0-e4c51a9137d3
2015-04-29 18:42:42 +10:00

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/*
* 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: 2.23 $
* $Date: 2006-12-28 00:59:48 $
* $Author: wmcoolmon $
*
* Code for particle system
*
* $Log: not supported by cvs2svn $
* Revision 2.22 2006/12/01 04:50:59 Goober5000
* reverted the buggy commit that caused Mantis bug #1101
*
* Revision 2.21 2006/09/11 06:45:40 taylor
* various small compiler warning and strict compiling fixes
*
* Revision 2.20 2006/09/08 06:18:29 taylor
* small optimization
*
* Revision 2.18 2006/05/27 16:52:50 taylor
* lots of little cleanup and minor fixage
* make Particles[] dynamic (appears to improve processing speed of two particle functions by about 30%)
* move to completely using Bobboau's geometry batcher instead of the stale one that RandomTiger did
* little change to PARTICLE_SMOKE to flip UV orient differently, may add some realism, or just look kinda neat
* get rid of particle_emit() stuff what was hardcoded for MAX_DETAIL_LEVEL value
*
* Revision 2.17 2006/01/21 09:36:58 wmcoolmon
* Texture replacement stuff
*
* Revision 2.16 2005/09/24 02:43:33 Goober5000
* whoops
* --Goober5000
*
* Revision 2.14 2005/06/19 09:00:09 taylor
* minor sanity checking for geometry_batcher
* make particle batchers allocate dynamically
* handle cases where a particle graphic couldn't be loaded
*
* 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 <vector>
#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"
#include "graphics/grbatch.h"
#include "parse/parselo.h"
#ifndef NDEBUG
#include "io/timer.h"
#endif
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
int 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
int particle_index; // used to keep particle offset in dynamic array for orient usage
//WMC data
int batcher;
} particle;
struct particle_batcher {
private:
int bmap_id;
int bmap_nframes;
geometry_batcher *bmap_batchers;
void clone(const particle_batcher &other)
{
bmap_id = other.bmap_id;
bmap_nframes = other.bmap_nframes;
if(other.bmap_batchers != NULL)
{
bmap_batchers = new geometry_batcher[bmap_nframes];
for(int i = 0; i < bmap_nframes; i++) bmap_batchers[i] = other.bmap_batchers[i];
}
else
{
bmap_batchers = NULL;
}
}
public:
particle_batcher(const particle_batcher &pb) { clone(pb); }
particle_batcher(){bmap_id=-1;bmap_nframes=0;bmap_batchers=NULL;}
int Set(char *fname)
{
bmap_id = bm_load_animation(fname, &bmap_nframes, NULL, 0);
if(bmap_id < 0)
{
bmap_id = bm_load(fname);
if(bmap_id > -1)
bmap_nframes = 1;
else
bmap_nframes = 0;
}
else
{
bm_get_info(bmap_id, NULL, NULL, NULL, &bmap_nframes, NULL);
}
if(bmap_batchers != NULL)
{
delete[] bmap_batchers;
bmap_batchers = NULL;
}
if(bmap_id > -1)
{
bmap_batchers = new geometry_batcher[bmap_nframes];
}
return bmap_id;
}
int Set(int n_bmap_id)
{
if(bmap_batchers != NULL)
{
delete[] bmap_batchers;
bmap_batchers = NULL;
}
if(!bm_is_valid(n_bmap_id))
{
bmap_id = -1;
bmap_nframes = 0;
}
else
{
bmap_id = n_bmap_id;
bmap_nframes = 1;
bm_get_info(bmap_id, NULL, NULL, NULL, &bmap_nframes, NULL);
bmap_batchers = new geometry_batcher[bmap_nframes];
}
return bmap_id;
}
~particle_batcher()
{
if(bmap_batchers != NULL)
{
delete[] bmap_batchers;
bmap_batchers = NULL;
}
}
const particle_batcher &operator =(const particle_batcher &other)
{
if (this != &other) {
clone(other);
}
return *this;
}
//Funcs
int GetBitmapId(){return bmap_id;}
bool PageIn()
{
if(bmap_id > 0)
{
bm_page_in_texture(bmap_id, bmap_nframes);
return true;
}
else
return false;
}
void AddBitmap(int frame_id, vertex *pnt, int orient, float rad, float angle = 1.0f, float depth = 0.0f)
{
if(bmap_batchers == NULL)
return;
int idx = frame_id - bmap_id;
bmap_batchers[idx].add_allocate(1);
bmap_batchers[idx].draw_bitmap(pnt, orient, rad, angle, depth);
}
float AddLaser(int frame_id, vec3d *p0, float width1, vec3d *p1, float width2, int r = 255, int g = 255, int b = 255)
{
if(bmap_batchers == NULL)
return 0.0f;
int idx = frame_id - bmap_id;
bmap_batchers[idx].add_allocate(1);
return bmap_batchers[idx].draw_laser(p0, width1, p1, width2, r, g, b);
}
void Render()
{
if(bmap_batchers == NULL)
return;
int i;
for(i = 0; i < bmap_nframes; i++)
{
const float alpha = 1.0f;
const int tmap_flags = TMAP_FLAG_TEXTURED | TMAP_HTL_3D_UNLIT;
if ( bmap_batchers[i].need_to_render() ) {
gr_set_bitmap(bmap_id + i, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, alpha );
bmap_batchers[i].render(tmap_flags);
}
}
}
};
static std::vector<particle> Particles;
static int Particles_enabled = 1;
static std::vector<particle_batcher> Batchers;
// Reset everything between levels
void particle_init()
{
// Particles_enabled = os_config_read_uint( NULL, "UseParticles", 0 );
Particles.clear();
Batchers.clear();
}
static int Particle_fire = -1;
int particle_get_fire_id()
{
if(Particle_fire > -1)
return Particle_fire;
Particle_fire = bm_load_animation("particleexp01");
if(Particle_fire < 0)
Particle_fire = bm_load("particleexp01");
return Particle_fire;
}
static int Particle_smoke = -1;
int particle_get_smoke_id()
{
if(Particle_smoke > -1)
return Particle_smoke;
Particle_smoke = bm_load_animation("particlesmoke01");
if(Particle_smoke < 0)
Particle_smoke = bm_load("particlesmoke02");
return Particle_smoke;
}
static int Particle_smoke2 = -1;
int particle_get_smoke2_id()
{
if(Particle_smoke2 > -1)
return Particle_smoke2;
Particle_smoke2 = bm_load_animation("particlesmoke02");
if(Particle_smoke2 < 0)
Particle_smoke2 = bm_load("particlesmoke02");
return Particle_smoke2;
}
// only call from game_shutdown()!!!
void particle_close()
{
Particles.clear();
Batchers.clear();
}
void particle_page_in()
{
for(uint i = 0; i < Batchers.size(); i++)
{
Batchers[i].PageIn();
}
}
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;
int particle_load_batcher(int bmap_id)
{
//WMC - make sure we get the right batcher
int first_frame = bm_get_info(bmap_id);
if(first_frame > -1)
{
for(uint i = 0; i < Batchers.size(); i++)
{
if(Batchers[i].GetBitmapId() == first_frame)
return i;
}
Batchers.push_back(particle_batcher());
int nidx = Batchers.size()-1;
if(Batchers[nidx].Set(first_frame) == first_frame)
return nidx;
}
return -1;
}
// Creates a single particle. See the PARTICLE_?? defines for types.
void particle_create( particle_info *pinfo )
{
particle new_particle;
if ( !Particles_enabled )
return;
#ifdef NDEBUG
//WMC - No texture to emit.
if(pinfo->optional_data < 0)
return;
#endif
if (Particles.size() > (uint)Num_particles_hwm) {
Num_particles_hwm = (int)Particles.size();
nprintf(("Particles", "Num_particles high water mark = %i\n", Num_particles_hwm));
}
// Init the particle data
memset( &new_particle, 0, sizeof(particle) );
new_particle.pos = pinfo->pos;
new_particle.velocity = pinfo->vel;
new_particle.age = 0.0f;
new_particle.max_life = pinfo->lifetime;
new_particle.radius = pinfo->rad;
new_particle.optional_data = pinfo->optional_data;
new_particle.type = pinfo->type;
#ifndef NDEBUG
if(new_particle.optional_data < 0)
new_particle.type = PARTICLE_DEBUG;
#endif
new_particle.tracer_length = pinfo->tracer_length;
new_particle.attached_objnum = pinfo->attached_objnum;
new_particle.attached_sig = pinfo->attached_sig;
new_particle.reverse = pinfo->reverse;
new_particle.particle_index = (int)Particles.size();
if ( (new_particle.type == PARTICLE_BITMAP)/* || (new_particle.type == PARTICLE_BITMAP_PERSISTENT)*/ )
{
int fps;
int first_frame = bm_get_info( new_particle.optional_data, NULL, NULL, NULL, &new_particle.nframes, &fps );
if ( new_particle.nframes > 1 )
{
// Recalculate max life for ani's
new_particle.max_life = i2fl(new_particle.nframes) / i2fl(fps);
new_particle.batcher = particle_load_batcher(first_frame);
}
#ifndef NDEBUG
else
{
new_particle.type = PARTICLE_DEBUG;
}
#endif
}
else
{
new_particle.nframes = 1;
}
Particles.push_back( new_particle );
}
void particle_create( vec3d *pos, vec3d *vel, float lifetime, float rad, int type, uint optional_data, float tracer_length, object *objp, bool reverse )
{
particle_info pinfo;
if ( (type < 0) || (type >= NUM_PARTICLE_TYPES) ) {
Int3();
return;
}
// 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;
if(objp == NULL)
{
pinfo.attached_objnum = -1;
pinfo.attached_sig = -1;
}
else
{
pinfo.attached_objnum = OBJ_INDEX(objp);
pinfo.attached_sig = objp->signature;
}
pinfo.reverse = reverse? 1 : 0;
// lower level function
particle_create(&pinfo);
}
MONITOR( NumParticles )
void particle_move_all(float frametime)
{
particle *p;
if ( !Particles_enabled )
return;
MONITOR_INC(NumParticles, Particles.size());
for (uint i = 0; i < Particles.size(); i++) {
p = &Particles[i];
// bogus attached objnum
if (p->attached_objnum >= MAX_OBJECTS) {
Particles.erase( Particles.begin() + i );
continue;
}
p->age += frametime;
if ( p->age > p->max_life ) {
// If it's time expired remove it
Particles.erase( Particles.begin() + i );
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) {
Particles.erase( Particles.begin() + i );
continue;
}
}
// move as a regular particle
else {
// Move the particle
vm_vec_scale_add2( &p->pos, &p->velocity, frametime );
}
}
}
// kill all active particles
void particle_kill_all()
{
// int idx;
// kill all active particles
Num_particles_hwm = 0;
Particles.clear();
Batchers.clear();
}
MONITOR( NumParticlesRend )
void particle_render_all()
{
particle *p;
ubyte flags;
float pct_complete;
float alpha = 1.0f;
vertex pos, pos_htl;
vec3d ts, te, temp;
int rotate = 1;
uint i;
int framenum;
// int cur_frame;
if ( !Particles_enabled )
return;
MONITOR_INC( NumParticlesRend, Particles.size() );
// int n = 0;
int nclipped = 0;
for (i = 0; i < Particles.size(); i++) {
p = &Particles[i];
// n++;
// make sure "rotate" is enabled for this particle
rotate = 1;
// pct complete for the particle
pct_complete = p->age / p->max_life;
// calculate the alpha to draw at
alpha = 1.0f;
// 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);
flags = g3_rotate_vertex(&pos, &temp);
if (flags) {
nclipped++;
continue;
}
if (!Cmdline_nohtl)
g3_transfer_vertex(&pos_htl, &temp);
// don't bother rotating again
rotate = 0;
}
// rotate the vertex
if (rotate) {
flags = g3_rotate_vertex( &pos, &p->pos );
if ( flags ) {
nclipped++;
continue;
}
if (!Cmdline_nohtl)
g3_transfer_vertex(&pos_htl, &p->pos);
}
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:
{ // A bitmap, optional data is the bitmap number
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;
}
if(p->batcher < 0)
break;
// if this is a tracer style particle
if (p->tracer_length > 0.0f) {
//batch_add_laser( framenum, &ts, p->radius, &te, p->radius );
Batchers[p->batcher].AddLaser(framenum, &ts, p->radius, &te, p->radius);
}
// draw as a regular bitmap
else {
Batchers[p->batcher].AddBitmap(framenum, (Cmdline_nohtl) ? &pos : &pos_htl, p->particle_index % 8, p->radius, alpha);
//batch_add_bitmap( framenum, tmap_flags, (Cmdline_nohtl) ? &pos : &pos_htl, p->particle_index % 8, p->radius, alpha );
}
break;
}
}
}
for(i = 0; i < Batchers.size(); i++)
{
Batchers[i].Render();
}
// mprintf(( "NP=%d, NCP=%d\n", n, nclipped ));
}
//============================================================================
//============== HIGH-LEVEL PARTICLE SYSTEM CREATION CODE ====================
//============================================================================
// Use a structure rather than pass a ton of parameters to particle_emit
/*
typedef struct particle_emitter {
int num_low; // Lowest number of particles to create
int num_high; // Highest number of particles to create
vec3d pos; // Where the particles emit from
vec3d vel; // Initial velocity of all the particles
float lifetime; // How long the particles live
vec3d normal; // What normal the particle emit arond
float normal_variance; // How close they stick to that normal 0=good, 1=360 degree
float min_vel; // How fast the slowest particle can move
float max_vel; // How fast the fastest particle can move
float min_rad; // Min radius
float max_rad; // Max radius
} particle_emitter;
*/
static inline int get_percent(int count)
{
if (count == 0)
return 0;
// this should basically return a scale like:
// 50, 75, 100, 125, 150, ...
// based on value of 'count' (detail level)
return ( 50 + (25 * (count-1)) );
}
// Creates a bunch of particles. You pass a structure
// rather than a bunch of parameters.
void particle_emit( particle_emitter *pe )
{
int i, n;
if ( !Particles_enabled )
return;
#ifdef NDEBUG
//WMC - No texture to emit.
if(pe->texture_id < 0)
return;
#endif
int n1, n2;
// Account for detail
int percent = get_percent(Detail.num_particles);
//Particle rendering drops out too soon. Seems to be around 150 m. Is it detail level controllable? I'd like it to be 500-1000
float min_dist = 125.0f;
float dist = vm_vec_dist_quick( &pe->pos, &Eye_position ) / pe->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; i<n; i++ ) {
// Create a particle
vec3d tmp_vel;
vec3d normal; // What normal the particle emit arond
float radius = (( pe->max_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 );
#ifndef NDEBUG
if(pe->texture_id < 0)
particle_create( &pe->pos, &tmp_vel, life, radius, PARTICLE_DEBUG);
#else
particle_create( &pe->pos, &tmp_vel, life, radius, PARTICLE_BITMAP, pe->texture_id );
#endif
}
}
void parse_particle_emitter(particle_emitter *pe)
{
Assert(pe != NULL);
if(optional_string("+Texture:"))
{
char buf[MAX_FILENAME_LEN];
stuff_string(buf, F_NAME, sizeof(buf));
int th = bm_load_animation(buf);
if(th < 0)
th = bm_load(buf);
if(th > -1)
{
if(pe->texture_id > -1)
bm_unload(pe->texture_id);
pe->texture_id = th;
}
}
if(optional_string("+Relative Position:"))
stuff_vector(&pe->pos);
if(optional_string("+Relative Velocity:"))
stuff_vector(&pe->vel);
if(optional_string("+Relative Normal:"))
stuff_vector(&pe->normal);
if(optional_string("+Normal Variance:"))
stuff_float(&pe->normal_variance);
if(optional_string("+Min Radius:"))
stuff_float(&pe->min_rad);
if(optional_string("+Max Radius:"))
stuff_float(&pe->max_rad);
if(optional_string("+Min Speed:"))
stuff_float(&pe->min_vel);
if(optional_string("+Max Speed:"))
stuff_float(&pe->max_vel);
if(optional_string("+Min Lifetime:"))
stuff_float(&pe->min_life);
if(optional_string("+Max Lifetime:"))
stuff_float(&pe->max_life);
if(optional_string("+Min Particles:"))
stuff_int(&pe->num_low);
if(optional_string("+Max Particles:"))
stuff_int(&pe->num_high);
}
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