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quakeforge/qw/source/gl_dyn_part.c
Timothy C. McGrath 1843bb5839 Minor housecleaning. sw no longer spits out diagnostic output, comments 
are now sane and match current code, I moved things around in GL so they
more closely match the sw code, as the sw code makes more sense now that
I *finally* understand what in gods name I was doing wrong. ;)

I also made minor changes to the help to indicate the minimum values of
the variables (sw can deal with 1, gl 0) as well as that you really
ought to use r_particles 0 instead of a setting of cl_max_particles 0 in
GL :P

Thanks for all the help taniwha, those last two bugs were kicking my
butt.

Misty-chan
2001-04-03 05:40:15 +00:00

708 lines
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/*
gl_dyn_part.c
OpenGL particle system.
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
$Id$
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdlib.h>
#include "QF/cmd.h"
#include "QF/compat.h"
#include "QF/console.h"
#include "glquake.h"
#include "host.h"
#include "r_dynamic.h"
#include "QF/qargs.h"
#include "QF/sys.h"
typedef enum {
pt_static, pt_grav, pt_blob, pt_blob2,
pt_smoke, pt_smokecloud, pt_bloodcloud,
pt_fadespark, pt_fadespark2, pt_fallfadespark
} ptype_t;
typedef struct particle_s {
// driver-usable fields
vec3_t org;
int tex;
float color;
float alpha;
float scale;
vec3_t vel;
float ramp;
float die;
ptype_t type;
} particle_t;
static particle_t *particles, **freeparticles;
static short r_numparticles, numparticles;
extern qboolean lighthalf;
extern cvar_t *cl_max_particles;
extern int part_tex_smoke[8];
extern int part_tex_dot;
int ramp[8] = { 0x6d, 0x6b, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01 };
inline particle_t *
particle_new (ptype_t type, int texnum, vec3_t org, float scale, vec3_t vel,
float die, byte color, byte alpha)
{
particle_t *part;
if (numparticles >= r_numparticles) {
// Con_Printf("FAILED PARTICLE ALLOC!\n");
return NULL;
}
part = &particles[numparticles++];
part->type = type;
VectorCopy (org, part->org);
VectorCopy (vel, part->vel);
part->die = die;
part->color = color;
part->alpha = alpha;
part->tex = texnum;
part->scale = scale;
return part;
}
inline particle_t *
particle_new_random (ptype_t type, int texnum, vec3_t org, int org_fuzz,
float scale, int vel_fuzz, float die, byte color,
byte alpha)
{
vec3_t porg, pvel;
int j;
for (j = 0; j < 3; j++) {
if (org_fuzz)
porg[j] = lhrandom (-org_fuzz, org_fuzz) + org[j];
if (vel_fuzz)
pvel[j] = lhrandom (-vel_fuzz, vel_fuzz);
}
return particle_new (type, texnum, porg, scale, pvel, die, color, alpha);
}
/*
R_MaxParticlesCheck
Misty-chan: Dynamically change the maximum amount of particles on the fly.
Thanks to a LOT of help from Taniwha, Deek, Mercury, Lordhavoc, and lots of others.
*/
void
R_MaxParticlesCheck (cvar_t *var)
{
/*
Catchall. If the user changed the setting to a number less than zero *or* if we had a wacky cfg get past
the init code check, this will make sure we don't have problems. Also note that grabbing the var->int_val is IMPORTANT:
Prevents a segfault since if we grabbed the int_val of cl_max_particles we'd sig11 right here at startup.
*/
r_numparticles = max(var->int_val, 0);
/*
Enable this to see how many particles are ACTUALLY allocated whenever you do a cl_max_particles change
Also note it's damned useful for checking for if this thing is running more than it should!
Con_Printf ("%d", r_numparticles);
*/
// Be very careful the next time we do something like this. calloc/free are IMPORTANT
// and the compiler doesn't know when we do bad things with them.
free (particles);
free (freeparticles);
particles = (particle_t *)
calloc (r_numparticles, sizeof (particle_t));
freeparticles = (particle_t **)
calloc (r_numparticles, sizeof (particle_t*));
R_ClearParticles();
}
/*
R_Particles_Init_Cvars
*/
void
R_Particles_Init_Cvars (void)
{
// Misty-chan: This is a cvar that does callbacks. Whenever it changes, it calls the function
// R_MaxParticlesCheck and therefore is very nifty.
Cvar_Get ("cl_max_particles", "2048", CVAR_ARCHIVE, R_MaxParticlesCheck,
"Maximum amount of particles to display. No maximum, minimum is 0, although it's best to use r_particles 0 instead.");
}
/*
R_ClearParticles
*/
void
R_ClearParticles (void)
{
numparticles = 0;
}
void
R_ReadPointFile_f (void)
{
QFile *f;
vec3_t org;
int r;
int c;
char name[MAX_OSPATH], *mapname, *t1;
mapname = strdup (cl.worldmodel->name);
if (!mapname)
Sys_Error ("Can't duplicate mapname!");
t1 = strrchr (mapname, '.');
if (!t1)
Sys_Error ("Can't find .!");
t1[0] = '\0';
snprintf (name, sizeof (name), "%s.pts", mapname);
free (mapname);
COM_FOpenFile (name, &f);
if (!f) {
Con_Printf ("couldn't open %s\n", name);
return;
}
Con_Printf ("Reading %s...\n", name);
c = 0;
for (;;) {
char buf[64];
Qgets (f, buf, sizeof (buf));
r = sscanf (buf, "%f %f %f\n", &org[0], &org[1], &org[2]);
if (r != 3)
break;
c++;
if (!particle_new (pt_static, part_tex_dot, org, 1.5, vec3_origin,
99999, (-c) & 15, 255)) {
Con_Printf ("Not enough free particles\n");
break;
}
}
Qclose (f);
Con_Printf ("%i points read\n", c);
}
/*
R_ParticleExplosion
*/
void
R_ParticleExplosion (vec3_t org)
{
if (!r_particles->int_val)
return;
particle_new_random (pt_smokecloud, part_tex_smoke[rand () & 7], org, 4, 30,
8, cl.time + 5, (rand () & 7) + 8,
128 + (rand () & 63));
}
/*
R_BlobExplosion
*/
void
R_BlobExplosion (vec3_t org)
{
int i;
if (!r_particles->int_val)
return;
for (i = 0; i < 512; i++) {
particle_new_random (pt_blob, part_tex_dot, org, 12, 2, 256,
(cl.time + 1 + (rand () & 8) * 0.05),
(66 + rand () % 6), 255);
}
for (i = 0; i < 512; i++) {
particle_new_random (pt_blob2, part_tex_dot, org, 12, 2, 256,
(cl.time + 1 + (rand () & 8) * 0.05),
(150 + rand () % 6), 255);
}
}
static void
R_RunSparkEffect (vec3_t org, int count, int ofuzz)
{
if (!r_particles->int_val)
return;
particle_new (pt_smokecloud, part_tex_smoke[rand () & 7], org,
(ofuzz / 8) * .75, vec3_origin, cl.time + 99,
12 + (rand () & 3), 96);
while (count--)
particle_new_random (pt_fallfadespark, part_tex_dot, org, ofuzz * .75,
1, 96, cl.time + 5, ramp[rand () % 6],
lhrandom (0, 255));
}
static void
R_RunGunshotEffect (vec3_t org, int count)
{
int scale;
if (!r_particles->int_val)
return;
if (count > 6)
scale = 3;
else
scale = 2;
R_RunSparkEffect (org, count * 10, 8 * scale);
return;
}
static void
R_BloodPuff (vec3_t org, int count)
{
if (!r_particles->int_val)
return;
particle_new (pt_bloodcloud, part_tex_smoke[rand () & 7], org, 9,
vec3_origin, cl.time + 99, 68 + (rand () & 3), 128);
}
/*
R_RunPuffEffect
*/
void
R_RunPuffEffect (vec3_t org, byte type, byte count)
{
if (!r_particles->int_val)
return;
switch (type) {
case TE_GUNSHOT:
R_RunGunshotEffect (org, count);
break;
case TE_BLOOD:
R_BloodPuff (org, count);
break;
case TE_LIGHTNINGBLOOD:
R_BloodPuff (org, 5 + (rand () & 1));
break;
}
}
/*
R_RunParticleEffect
*/
void
R_RunParticleEffect (vec3_t org, int color, int count)
{
int i, j, scale;
vec3_t porg;
if (!r_particles->int_val)
return;
if (count > 130)
scale = 3;
else if (count > 20)
scale = 2;
else
scale = 1;
for (i = 0; i < count; i++) {
for (j = 0; j < 3; j++) {
porg[j] = org[j] + scale * ((rand () & 15) - 8);
}
particle_new (pt_grav, part_tex_dot, porg, 1.5, vec3_origin,
(cl.time + 0.1 * (rand () % 5)),
(color & ~7) + (rand () & 7), 255);
}
}
void
R_RunSpikeEffect (vec3_t org, byte type)
{
switch (type) {
case TE_SPIKE:
R_RunSparkEffect (org, 5, 8);
break;
case TE_SUPERSPIKE:
R_RunSparkEffect (org, 10, 8);
break;
case TE_KNIGHTSPIKE:
R_RunSparkEffect (org, 10, 8);
break;
case TE_WIZSPIKE:
R_RunSparkEffect (org, 15, 16);
break;
}
}
/*
R_LavaSplash
*/
void
R_LavaSplash (vec3_t org)
{
int i, j;
float vel;
vec3_t dir, porg, pvel;
if (!r_particles->int_val)
return;
for (i = -8; i < 8; i++) {
for (j = -8; j < 8; j++) {
dir[0] = j * 16 + (rand () & 7);
dir[1] = i * 16 + (rand () & 7);
dir[2] = 256;
porg[0] = org[0] + dir[0];
porg[1] = org[1] + dir[1];
porg[2] = org[2] + (rand () & 63);
VectorNormalize (dir);
vel = 50 + (rand () & 63);
VectorScale (dir, vel, pvel);
particle_new (pt_grav, part_tex_dot, porg, 3, pvel,
(cl.time + 2 + (rand () & 31) * 0.02),
(224 + (rand () & 7)), 193);
}
}
}
/*
R_TeleportSplash
*/
void
R_TeleportSplash (vec3_t org)
{
int i, j, k;
float vel;
vec3_t dir, porg, pvel;
if (!r_particles->int_val)
return;
for (i = -16; i < 16; i += 4)
for (j = -16; j < 16; j += 4)
for (k = -24; k < 32; k += 4) {
dir[0] = j * 8;
dir[1] = i * 8;
dir[2] = k * 8;
porg[0] = org[0] + i + (rand () & 3);
porg[1] = org[1] + j + (rand () & 3);
porg[2] = org[2] + k + (rand () & 3);
VectorNormalize (dir);
vel = 50 + (rand () & 63);
VectorScale (dir, vel, pvel);
particle_new (pt_grav, part_tex_dot, porg, 0.6, pvel,
(cl.time + 0.2 + (rand () & 7) * 0.02),
(7 + (rand () & 7)), 255);
}
}
void
R_RocketTrail (int type, entity_t *ent)
{
vec3_t vec;
float len;
int j, ptex;
ptype_t ptype;
vec3_t porg, pvel;
float pdie, pscale;
byte palpha, pcolor;
if (type == 0)
R_AddFire (ent->old_origin, ent->origin, ent);
if (!r_particles->int_val)
return;
VectorSubtract (ent->origin, ent->old_origin, vec);
len = VectorNormalize (vec);
while (len > 0) {
VectorCopy (vec3_origin, pvel);
pdie = cl.time + 2;
ptype = pt_static;
ptex = part_tex_dot;
pcolor = 0;
pscale = .75;
palpha = 255;
switch (type) {
case 0: // rocket trail
pcolor = (rand () & 3) + 12;
goto common_rocket_gren_trail;
case 1: // grenade trail
pcolor = (rand () & 3) + 3;
goto common_rocket_gren_trail;
common_rocket_gren_trail:
len -= 4;
ptex = part_tex_smoke[rand () & 7];
pscale = lhrandom (6, 9);
palpha = 48 + (rand () & 31);
ptype = pt_smoke;
pdie = cl.time + 1;
VectorCopy (ent->old_origin, porg);
break;
case 4: // slight blood
len -= 4;
case 2: // blood
len -= 4;
ptex = part_tex_dot;
pcolor = 68 + (rand () & 3);
pdie = cl.time + 2;
for (j = 0; j < 3; j++) {
pvel[j] = (rand () & 15) - 8;
porg[j] = ent->old_origin[j] + ((rand () % 3) - 2);
}
ptype = pt_grav;
break;
case 6: // voor trail
len -= 3;
pcolor = 9 * 16 + 8 + (rand () & 3);
ptype = pt_static;
pscale = lhrandom (.75, 1.5);
pdie = cl.time + 0.3;
for (j = 0; j < 3; j++)
porg[j] = ent->old_origin[j] + ((rand () & 15) - 8);
break;
case 3:
case 5: // tracer
{
static int tracercount;
len -= 3;
pdie = cl.time + 0.5;
ptype = pt_static;
pscale = lhrandom (1.5, 3);
if (type == 3)
pcolor = 52 + ((tracercount & 4) << 1);
else
pcolor = 230 + ((tracercount & 4) << 1);
tracercount++;
VectorCopy (ent->old_origin, porg);
if (tracercount & 1) {
pvel[0] = 30 * vec[1];
pvel[1] = 30 * -vec[0];
} else {
pvel[0] = 30 * -vec[1];
pvel[1] = 30 * vec[0];
}
break;
}
}
VectorAdd (ent->old_origin, vec, ent->old_origin);
particle_new (ptype, ptex, porg, pscale, pvel, pdie, pcolor, palpha);
}
}
/*
R_DrawParticles
*/
void
R_DrawParticles (void)
{
byte i;
float grav, fast_grav, dvel;
float minparticledist;
unsigned char *at;
byte alpha;
vec3_t up, right;
float scale;
particle_t *part;
int activeparticles, maxparticle, j, k;
// LordHavoc: particles should not affect zbuffer
glDepthMask (GL_FALSE);
VectorScale (vup, 1.5, up);
VectorScale (vright, 1.5, right);
grav = (fast_grav = host_frametime * 800) * 0.05;
dvel = 4 * host_frametime;
minparticledist = DotProduct (r_refdef.vieworg, vpn) + 32.0f;
activeparticles = 0;
maxparticle = -1;
j = 0;
for (k = 0, part = particles; k < numparticles; k++, part++) {
// LordHavoc: this is probably no longer necessary, as it is checked at the end, but could still happen on weird particle effects, left for safety...
if (part->die <= cl.time) {
freeparticles[j++] = part;
continue;
}
maxparticle = k;
activeparticles++;
// Don't render particles too close to us.
// Note, we must still do physics and such on them.
if (!(DotProduct (part->org, vpn) < minparticledist) &&
r_particles->int_val) {
at = (byte *) & d_8to24table[(byte) part->color];
alpha = part->alpha;
if (lighthalf)
glColor4ub ((byte) ((int) at[0] >> 1),
(byte) ((int) at[1] >> 1),
(byte) ((int) at[2] >> 1), alpha);
else
glColor4ub (at[0], at[1], at[2], alpha);
scale = part->scale;
glBindTexture (GL_TEXTURE_2D, part->tex);
glBegin (GL_QUADS);
glTexCoord2f (0, 1);
glVertex3f ((part->org[0] + ((up[0] + right[0]) * scale)),
(part->org[1] + ((up[1] + right[1]) * scale)),
(part->org[2] + ((up[2] + right[2]) * scale)));
glTexCoord2f (0, 0);
glVertex3f ((part->org[0] + (up[0] * -scale) + (right[0] * scale)),
(part->org[1] + (up[1] * -scale) + (right[1] * scale)),
(part->org[2] + (up[2] * -scale) + (right[2] * scale)));
glTexCoord2f (1, 0);
glVertex3f ((part->org[0] + ((up[0] + right[0]) * -scale)),
(part->org[1] + ((up[1] + right[1]) * -scale)),
(part->org[2] + ((up[2] + right[2]) * -scale)));
glTexCoord2f (1, 1);
glVertex3f ((part->org[0] + (up[0] * scale) + (right[0] * -scale)),
(part->org[1] + (up[1] * scale) + (right[1] * -scale)),
(part->org[2] + (up[2] * scale) + (right[2] * -scale)));
glEnd ();
}
for (i = 0; i < 3; i++)
part->org[i] += part->vel[i] * host_frametime;
switch (part->type) {
case pt_static:
break;
case pt_blob:
for (i = 0; i < 3; i++)
part->vel[i] += part->vel[i] * dvel;
part->vel[2] -= grav;
break;
case pt_blob2:
for (i = 0; i < 2; i++)
part->vel[i] -= part->vel[i] * dvel;
part->vel[2] -= grav;
break;
case pt_grav:
part->vel[2] -= grav;
break;
case pt_smoke:
if ((part->alpha -= host_frametime * 90) < 1)
part->die = -1;
part->scale += host_frametime * 6;
part->org[2] += host_frametime * 30;
break;
case pt_smokecloud:
if ((part->alpha -= host_frametime * 128) < 1)
part->die = -1;
part->scale += host_frametime * 60;
part->org[2] += host_frametime * 90;
break;
case pt_bloodcloud:
/*
if (Mod_PointInLeaf(part->org, cl.worldmodel)->contents != CONTENTS_EMPTY)
{
part->die = -1;
break;
}
*/
if ((part->alpha -= host_frametime * 64) < 1)
{
part->die = -1;
// extra break only helps here
break;
}
part->scale += host_frametime * 4;
part->vel[2] -= grav;
break;
case pt_fadespark:
if ((part->alpha -= host_frametime * 256) < 1)
part->die = -1;
part->vel[2] -= grav;
break;
case pt_fadespark2:
if ((part->alpha -= host_frametime * 512) < 1)
part->die = -1;
part->vel[2] -= grav;
break;
case pt_fallfadespark:
if ((part->alpha -= host_frametime * 256) < 1)
part->die = -1;
part->vel[2] -= fast_grav;
break;
}
// LordHavoc: immediate removal of unnecessary particles (must be done to ensure compactor below operates properly in all cases)
if (part->die <= cl.time)
freeparticles[j++] = part;
}
k = 0;
while (maxparticle >= activeparticles) {
*freeparticles[k++] = particles[maxparticle--];
while (maxparticle >= activeparticles
&& particles[maxparticle].die <= cl.time)
maxparticle--;
}
numparticles = activeparticles;
glColor3ubv (lighthalf_v);
glDepthMask (GL_TRUE);
}
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