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quakeforge/libs/video/renderer/gl/gl_dyn_part.c

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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/console.h"
#include "QF/cvar.h"
#include "QF/qargs.h"
#include "QF/render.h"
#include "QF/sys.h"
#include "QF/vfs.h"
#include "QF/GL/defines.h"
#include "QF/GL/funcs.h"
#include "compat.h"
#include "r_cvar.h"
#include "r_dynamic.h"
#include "r_shared.h"
#include "varrays.h"
static particle_t *particles, **freeparticles;
static short r_numparticles, numparticles;
int ramp[8] = { 0x6f, 0x6d, 0x6b, 0x69, 0x67, 0x65, 0x63, 0x61 };
extern int part_tex_dot;
extern int part_tex_spark;
extern int part_tex_smoke[8];
extern cvar_t *cl_max_particles;
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)
{
int j;
vec3_t porg, pvel;
for (j = 0; j < 3; j++) {
if (org_fuzz)
porg[j] = qfrandom (org_fuzz * 2) - org_fuzz + org[j];
if (vel_fuzz)
pvel[j] = qfrandom (vel_fuzz * 2) - 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);
/*
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();
}
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.");
}
inline void
R_ClearParticles (void)
{
numparticles = 0;
}
void
R_ReadPointFile_f (void)
{
char name[MAX_OSPATH], *mapname, *t1;
int c, r;
vec3_t org;
VFile *f;
mapname = strdup (r_worldentity.model->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);
}
void
R_ParticleExplosion (vec3_t org)
{
// int i;
// int j = 1024;
if (!r_particles->int_val)
return;
if (numparticles >= r_numparticles)
return;
// else if (numparticles + j >= r_numparticles)
// j = r_numparticles - numparticles;
particle_new_random (pt_smokecloud, part_tex_smoke[rand () & 7], org, 4,
30, 8, r_realtime + 5, (rand () & 7) + 8,
128 + (rand () & 63));
/*
for (i=0; i < j; i++) {
particle_new_random (pt_fallfadespark, part_tex_spark, org, 16,
1.5, 256, r_realtime + 5, ramp[rand () & 7],
255);
}
*/
}
void
R_ParticleExplosion2 (vec3_t org, int colorStart, int colorLength)
{
int i;
int colorMod = 0, j = 512;
if (!r_particles->int_val)
return;
if (numparticles >= r_numparticles)
return;
else if (numparticles + j >= r_numparticles)
j = r_numparticles - numparticles;
for (i = 0; i < j; i++) {
particle_new_random (pt_blob, part_tex_dot, org, 16, 2, 256,
(r_realtime + 0.3),
(colorStart + (colorMod % colorLength)), 255);
colorMod++;
}
}
void
R_BlobExplosion (vec3_t org)
{
int i;
int j = 1024;
if (!r_particles->int_val)
return;
if (numparticles >= r_numparticles)
return;
else if (numparticles + j >= r_numparticles)
j = r_numparticles - numparticles;
for (i = 0; i < j / 2; i++) {
particle_new_random (pt_blob, part_tex_dot, org, 12, 2, 256,
(r_realtime + 1 + (rand () & 7) * 0.05),
(66 + rand () % 6), 255);
}
for (i = 0; i < j / 2; i++) {
particle_new_random (pt_blob2, part_tex_dot, org, 12, 2, 256,
(r_realtime + 1 + (rand () & 7) * 0.05),
(150 + rand () % 6), 255);
}
}
static void
R_RunSparkEffect (vec3_t org, int count, int ofuzz)
{
int j = count + 1;
if (numparticles >= r_numparticles)
return;
else if (numparticles + j >= r_numparticles)
j = r_numparticles - numparticles;
count = j - 1;
particle_new (pt_smokecloud, part_tex_smoke[rand () & 7], org,
ofuzz * 0.08, vec3_origin, r_realtime + 9,
12 + (rand () & 3), 64 + (rand () & 31));
while (count--)
particle_new_random (pt_fallfadespark, part_tex_spark, org,
ofuzz * 0.75, 1, 96, r_realtime + 5,
ramp[rand () & 7], 255);
}
inline static void
R_BloodPuff (vec3_t org, int count)
{
if (numparticles >= r_numparticles)
return;
particle_new (pt_bloodcloud, part_tex_smoke[rand () & 7], org, 9,
vec3_origin, r_realtime + 99, 68 + (rand () & 3), 128);
}
void
R_RunPuffEffect (vec3_t org, particle_effect_t type, byte count)
{
if (!r_particles->int_val)
return;
switch (type) {
case PE_GUNSHOT:
{
int scale = 16;
if (count > 6)
scale = 24;
R_RunSparkEffect (org, count / 2, scale);
}
break;
case PE_BLOOD:
R_BloodPuff (org, count);
break;
case PE_LIGHTNINGBLOOD:
R_BloodPuff (org, 5 + (rand () & 1));
count = 4 + (rand () % 5);
if (numparticles >= r_numparticles)
return;
else if (numparticles + count >= r_numparticles)
count = r_numparticles - numparticles - 1;
particle_new (pt_smokecloud, part_tex_smoke[rand () & 7], org,
3, vec3_origin, r_realtime + 9,
12 + (rand () & 3), 64 + (rand () & 31));
while (count--)
particle_new_random (pt_fallfadespark, part_tex_spark, org,
12, 2, 128, r_realtime + 5,
244 + (rand () % 3), 255);
break;
default:
break;
}
}
void
R_RunParticleEffect (vec3_t org, int color, int count)
{
int scale, i, j;
int k = count;
vec3_t porg;
if (!r_particles->int_val)
return;
if (numparticles >= r_numparticles)
return;
if (count > 130)
scale = 3;
else if (count > 20)
scale = 2;
else
scale = 1;
if (numparticles + k >= r_numparticles)
k = r_numparticles - numparticles;
count = k;
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,
(r_realtime + 0.1 * (rand () % 5)),
(color & ~7) + (rand () & 7), 255);
}
}
void
R_RunSpikeEffect (vec3_t org, particle_effect_t type)
{
if (!r_particles->int_val)
return;
switch (type) {
case PE_SPIKE:
R_RunSparkEffect (org, 5, 8);
break;
case PE_SUPERSPIKE:
R_RunSparkEffect (org, 10, 8);
break;
case PE_KNIGHTSPIKE:
R_RunSparkEffect (org, 10, 8);
break;
case PE_WIZSPIKE:
R_RunSparkEffect (org, 15, 16);
break;
default:
break;
}
}
void
R_LavaSplash (vec3_t org)
{
float vel;
int i, j;
int k = 256;
vec3_t dir, porg, pvel;
if (!r_particles->int_val)
return;
if (numparticles + k >= r_numparticles) {
return;
} // else if (numparticles + k >= r_numparticles) {
// k = r_numparticles - numparticles;
// }
for (i = -128; i < 128; i += 16) {
for (j = -128; j < 128; j += 16) {
dir[0] = j + (rand () & 7);
dir[1] = i + (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,
(r_realtime + 2 + (rand () & 31) * 0.02),
(224 + (rand () & 7)), 193);
}
}
}
void
R_TeleportSplash (vec3_t org)
{
float vel;
int i, j, k;
int l = 896;
vec3_t dir, porg, pvel;
if (!r_particles->int_val)
return;
if (numparticles + l >= r_numparticles) {
return;
} // else if (numparticles + l >= r_numparticles) {
// l = r_numparticles - numparticles;
// }
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_spark, porg, 0.6, pvel,
(r_realtime + 0.2 + (rand () & 7) * 0.02),
(7 + (rand () & 7)), 255);
}
}
void
R_RocketTrail (entity_t *ent)
{
float dist, len, pscale, pscalenext;
vec3_t subtract, vec;
if (!r_particles->int_val)
return;
R_AddFire (ent->old_origin, ent->origin, ent);
VectorSubtract (ent->origin, ent->old_origin, vec);
len = VectorNormalize (vec);
pscale = 1.5 + qfrandom (1.5);
while (len > 0) {
if (numparticles >= r_numparticles)
return;
pscalenext = 1.5 + qfrandom (1.5);
dist = (pscale + pscalenext) * 3.0;
VectorScale (vec, min(dist, len), subtract);
VectorAdd (ent->old_origin, subtract, ent->old_origin);
len -= dist;
// Misty-chan's Easter Egg: change color to (rand () & 255)
particle_new (pt_smoke, part_tex_smoke[rand () & 7], ent->old_origin,
pscale, vec3_origin, r_realtime + 2.0,
12 + (rand () & 3), 128 + (rand () & 31));
pscale = pscalenext;
}
}
void
R_GrenadeTrail (entity_t *ent)
{
float dist, len, pscale, pscalenext;
vec3_t subtract, vec;
if (!r_particles->int_val)
return;
VectorSubtract (ent->origin, ent->old_origin, vec);
len = VectorNormalize (vec);
pscale = 6.0 + qfrandom (7.0);
while (len > 0) {
if (numparticles >= r_numparticles)
return;
pscalenext = 6.0 + qfrandom (7.0);
dist = (pscale + pscalenext) * 2.0;
VectorScale (vec, min(dist, len), subtract);
VectorAdd (ent->old_origin, subtract, ent->old_origin);
len -= dist;
// Misty-chan's Easter Egg: change color to (rand () & 255)
particle_new (pt_smoke, part_tex_smoke[rand () & 7], ent->old_origin,
pscale, vec3_origin, r_realtime + 2.0, (rand () & 3),
128 + (rand () & 31));
pscale = pscalenext;
}
}
void
R_BloodTrail (entity_t *ent)
{
float dist, len, pscale, pscalenext;
int j;
vec3_t subtract, vec, porg, pvel;
if (!r_particles->int_val)
return;
VectorSubtract (ent->origin, ent->old_origin, vec);
len = VectorNormalize (vec);
pscale = 5.0 + qfrandom (10.0);
while (len > 0) {
if (numparticles >= r_numparticles)
return;
VectorCopy (vec3_origin, pvel);
VectorCopy (ent->old_origin, porg);
pscalenext = 5.0 + qfrandom (10.0);
dist = (pscale + pscalenext) * 1.5;
for (j = 0; j < 3; j++) {
pvel[j] = (qfrandom (24.0) - 12.0);
porg[j] = ent->old_origin[j] + qfrandom (3.0) - 1.5;
}
VectorScale (vec, min(dist, len), subtract);
VectorAdd (ent->old_origin, subtract, ent->old_origin);
len -= dist;
particle_new (pt_grav, part_tex_smoke[rand () & 7], porg, pscale, pvel,
r_realtime + 2.0, 68 + (rand () & 3), 255);
pscale = pscalenext;
}
}
void
R_SlightBloodTrail (entity_t *ent)
{
float dist, len, pscale, pscalenext;
int j;
vec3_t subtract, vec, porg, pvel;
if (!r_particles->int_val)
return;
VectorSubtract (ent->origin, ent->old_origin, vec);
len = VectorNormalize (vec);
pscale = 1.5 + qfrandom (7.5);
while (len > 0) {
if (numparticles >= r_numparticles)
return;
VectorCopy (vec3_origin, pvel);
VectorCopy (ent->old_origin, porg);
pscalenext = 1.5 + qfrandom (7.5);
dist = (pscale + pscalenext) * 1.5;
for (j = 0; j < 3; j++) {
pvel[j] = (qfrandom (12.0) - 6.0);
porg[j] = ent->old_origin[j] + qfrandom (3.0) - 1.5;
}
VectorScale (vec, min(dist, len), subtract);
VectorAdd (ent->old_origin, subtract, ent->old_origin);
len -= dist;
particle_new (pt_grav, part_tex_smoke[rand () & 7], porg, pscale, pvel,
r_realtime + 1.5, 68 + (rand () & 3), 192);
pscale = pscalenext;
}
}
void
R_GreenTrail (entity_t *ent)
{
float dist, len;
static int tracercount;
vec3_t subtract, vec, pvel;
if (!r_particles->int_val)
return;
VectorSubtract (ent->origin, ent->old_origin, vec);
len = VectorNormalize (vec);
dist = 3.0;
while (len > 0) {
if (numparticles >= r_numparticles)
return;
VectorCopy (vec3_origin, pvel);
tracercount++;
if (tracercount & 1) {
pvel[0] = 30 * vec[1];
pvel[1] = 30 * -vec[0];
} else {
pvel[0] = 30 * -vec[1];
pvel[1] = 30 * vec[0];
}
VectorScale (vec, min(dist, len), subtract);
VectorAdd (ent->old_origin, subtract, ent->old_origin);
len -= dist;
particle_new (pt_fire, part_tex_smoke[rand () & 7], ent->old_origin,
2.0 + qfrandom (1.0), pvel, r_realtime + 0.5,
52 + (rand () & 4), 255);
}
}
void
R_FlameTrail (entity_t *ent)
{
float dist, len;
static int tracercount;
vec3_t subtract, vec, pvel;
if (!r_particles->int_val)
return;
VectorSubtract (ent->origin, ent->old_origin, vec);
len = VectorNormalize (vec);
dist = 3.0;
while (len > 0) {
if (numparticles >= r_numparticles)
return;
VectorCopy (vec3_origin, pvel);
tracercount++;
if (tracercount & 1) {
pvel[0] = 30 * vec[1];
pvel[1] = 30 * -vec[0];
} else {
pvel[0] = 30 * -vec[1];
pvel[1] = 30 * vec[0];
}
VectorScale (vec, min(dist, len), subtract);
VectorAdd (ent->old_origin, subtract, ent->old_origin);
len -= dist;
particle_new (pt_fire, part_tex_smoke[rand () & 7], ent->old_origin,
2.0 + qfrandom (1.0), pvel, r_realtime + 0.5, 234, 255);
}
}
void
R_VoorTrail (entity_t *ent)
{
float dist, len;
int j;
vec3_t subtract, vec, porg;
if (!r_particles->int_val)
return;
VectorSubtract (ent->origin, ent->old_origin, vec);
len = VectorNormalize (vec);
dist = 3.0;
while (len > 0) {
if (numparticles >= r_numparticles)
return;
for (j = 0; j < 3; j++)
porg[j] = ent->old_origin[j] + qfrandom (16.0) - 8.0;
VectorScale (vec, min(dist, len), subtract);
VectorAdd (ent->old_origin, subtract, ent->old_origin);
len -= dist;
particle_new (pt_static, part_tex_dot, porg, 1.0 + qfrandom (1.0),
vec3_origin, r_realtime + 0.3,
9 * 16 + 8 + (rand () & 3), 255);
}
}
void
R_DrawParticles (void)
{
byte i;
unsigned char *at;
float dvel, grav, fast_grav, minparticledist, scale;
int activeparticles, maxparticle, j, k;
particle_t *part;
vec3_t up_scale, right_scale, up_right_scale, down_right_scale;
if (!r_particles->int_val)
return;
// LordHavoc: particles should not affect zbuffer
qfglDepthMask (GL_FALSE);
varray[0].texcoord[0] = 0; varray[0].texcoord[1] = 1;
varray[1].texcoord[0] = 0; varray[1].texcoord[1] = 0;
varray[2].texcoord[0] = 1; varray[2].texcoord[1] = 0;
varray[3].texcoord[0] = 1; varray[3].texcoord[1] = 1;
grav = (fast_grav = r_frametime * 800) * 0.05;
dvel = 4 * r_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 <= r_realtime) {
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)) {
at = (byte *) & d_8to24table[(byte) part->color];
varray[0].color[0] = at[0];
varray[0].color[1] = at[1];
varray[0].color[2] = at[2];
varray[0].color[3] = part->alpha;
memcpy(varray[1].color, varray[0].color, sizeof(varray[0].color));
memcpy(varray[2].color, varray[0].color, sizeof(varray[0].color));
memcpy(varray[3].color, varray[0].color, sizeof(varray[0].color));
scale = part->scale;
VectorScale (vup, scale, up_scale);
VectorScale (vright, scale, right_scale);
VectorAdd (right_scale, up_scale, up_right_scale);
VectorSubtract (right_scale, up_scale, down_right_scale);
VectorAdd (part->org, up_right_scale, varray[0].vertex);
VectorAdd (part->org, down_right_scale, varray[1].vertex);
VectorSubtract (part->org, up_right_scale, varray[2].vertex);
VectorSubtract (part->org, down_right_scale, varray[3].vertex);
qfglBindTexture (GL_TEXTURE_2D, part->tex);
qfglDrawArrays (GL_QUADS, 0, 4);
}
for (i = 0; i < 3; i++)
part->org[i] += part->vel[i] * r_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 -= r_frametime * 100) < 1)
part->die = -1;
part->scale += r_frametime * 4;
// part->org[2] += r_frametime * 30 - grav;
break;
case pt_smokecloud:
if ((part->alpha -= r_frametime * 140) < 1)
{
part->die = -1;
break;
}
part->scale += r_frametime * 50;
part->org[2] += r_frametime * 30;
break;
case pt_bloodcloud:
if ((part->alpha -= r_frametime * 65) < 1)
{
part->die = -1;
break;
}
part->scale += r_frametime * 4;
part->vel[2] -= grav;
break;
case pt_fadespark:
if ((part->alpha -= r_frametime * 256) < 1)
part->die = -1;
part->vel[2] -= grav;
break;
case pt_fadespark2:
if ((part->alpha -= r_frametime * 512) < 1)
part->die = -1;
part->vel[2] -= grav;
break;
case pt_fallfadespark:
if ((part->alpha -= r_frametime * 256) < 1)
part->die = -1;
part->vel[2] -= fast_grav;
break;
case pt_fire:
if ((part->alpha -= r_frametime * 32) < 1)
part->die = -1;
part->scale -= r_frametime * 2;
break;
default:
Con_DPrintf ("unhandled particle type %d\n", part->type);
break;
}
}
k = 0;
while (maxparticle >= activeparticles) {
*freeparticles[k++] = particles[maxparticle--];
while (maxparticle >= activeparticles &&
particles[maxparticle].die <= r_realtime)
maxparticle--;
}
numparticles = activeparticles;
qfglColor3ubv (color_white);
qfglDepthMask (GL_TRUE);
}
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