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newtree/source/r_part.c

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/*
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 the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "quakedef.h"
#include "r_local.h"
#define MAX_PARTICLES 2048 // default max # of particles at one
// time
#define ABSOLUTE_MIN_PARTICLES 512 // no fewer than this no matter what's
// on the command line
int ramp1[8] = {0x6f, 0x6d, 0x6b, 0x69, 0x67, 0x65, 0x63, 0x61};
int ramp2[8] = {0x6f, 0x6e, 0x6d, 0x6c, 0x6b, 0x6a, 0x68, 0x66};
int ramp3[8] = {0x6d, 0x6b, 6, 5, 4, 3};
particle_t *active_particles, *free_particles;
particle_t *particles;
int r_numparticles;
vec3_t r_pright, r_pup, r_ppn;
/*
===============
R_InitParticles
===============
*/
void R_InitParticles (void)
{
int i;
i = COM_CheckParm ("-particles");
if (i)
{
r_numparticles = (int)(Q_atoi(com_argv[i+1]));
if (r_numparticles < ABSOLUTE_MIN_PARTICLES)
r_numparticles = ABSOLUTE_MIN_PARTICLES;
}
else
{
r_numparticles = MAX_PARTICLES;
}
particles = (particle_t *)
Hunk_AllocName (r_numparticles * sizeof(particle_t), "particles");
}
/*
===============
R_ClearParticles
===============
*/
void R_ClearParticles (void)
{
int i;
free_particles = &particles[0];
active_particles = NULL;
for (i=0 ;i<r_numparticles ; i++)
particles[i].next = &particles[i+1];
particles[r_numparticles-1].next = NULL;
}
void R_ReadPointFile_f (void)
{
FILE *f;
vec3_t org;
int r;
int c;
particle_t *p;
char name[MAX_OSPATH];
// FIXME sprintf (name,"maps/%s.pts", sv.name);
COM_FOpenFile (name, &f);
if (!f)
{
Con_Printf ("couldn't open %s\n", name);
return;
}
Con_Printf ("Reading %s...\n", name);
c = 0;
for ( ;; )
{
r = fscanf (f,"%f %f %f\n", &org[0], &org[1], &org[2]);
if (r != 3)
break;
c++;
if (!free_particles)
{
Con_Printf ("Not enough free particles\n");
break;
}
p = free_particles;
free_particles = p->next;
p->next = active_particles;
active_particles = p;
p->die = 99999;
p->color = (-c)&15;
p->type = pt_static;
VectorCopy (vec3_origin, p->vel);
VectorCopy (org, p->org);
}
fclose (f);
Con_Printf ("%i points read\n", c);
}
/*
===============
R_ParticleExplosion
===============
*/
void R_ParticleExplosion (vec3_t org)
{
int i, j;
particle_t *p;
for (i=0 ; i<1024 ; i++)
{
if (!free_particles)
return;
p = free_particles;
free_particles = p->next;
p->next = active_particles;
active_particles = p;
p->die = cl.time + 5;
p->color = ramp1[0];
p->ramp = rand()&3;
if (i & 1)
{
p->type = pt_explode;
for (j=0 ; j<3 ; j++)
{
p->org[j] = org[j] + ((rand()%32)-16);
p->vel[j] = (rand()%512)-256;
}
}
else
{
p->type = pt_explode2;
for (j=0 ; j<3 ; j++)
{
p->org[j] = org[j] + ((rand()%32)-16);
p->vel[j] = (rand()%512)-256;
}
}
}
}
/*
===============
R_BlobExplosion
===============
*/
void R_BlobExplosion (vec3_t org)
{
int i, j;
particle_t *p;
for (i=0 ; i<1024 ; i++)
{
if (!free_particles)
return;
p = free_particles;
free_particles = p->next;
p->next = active_particles;
active_particles = p;
p->die = cl.time + 1 + (rand()&8)*0.05;
if (i & 1)
{
p->type = pt_blob;
p->color = 66 + rand()%6;
for (j=0 ; j<3 ; j++)
{
p->org[j] = org[j] + ((rand()%32)-16);
p->vel[j] = (rand()%512)-256;
}
}
else
{
p->type = pt_blob2;
p->color = 150 + rand()%6;
for (j=0 ; j<3 ; j++)
{
p->org[j] = org[j] + ((rand()%32)-16);
p->vel[j] = (rand()%512)-256;
}
}
}
}
/*
===============
R_RunParticleEffect
===============
*/
void R_RunParticleEffect (vec3_t org, vec3_t dir, int color, int count)
{
int i, j;
particle_t *p;
int scale;
if (count > 130)
scale = 3;
else if (count > 20)
scale = 2;
else
scale = 1;
for (i=0 ; i<count ; i++)
{
if (!free_particles)
return;
p = free_particles;
free_particles = p->next;
p->next = active_particles;
active_particles = p;
p->die = cl.time + 0.1*(rand()%5);
p->color = (color&~7) + (rand()&7);
p->type = pt_grav;
for (j=0 ; j<3 ; j++)
{
p->org[j] = org[j] + scale*((rand()&15)-8);
p->vel[j] = dir[j]*15;// + (rand()%300)-150;
}
}
}
/*
===============
R_LavaSplash
===============
*/
void R_LavaSplash (vec3_t org)
{
int i, j, k;
particle_t *p;
float vel;
vec3_t dir;
for (i=-16 ; i<16 ; i++)
for (j=-16 ; j<16 ; j++)
for (k=0 ; k<1 ; k++)
{
if (!free_particles)
return;
p = free_particles;
free_particles = p->next;
p->next = active_particles;
active_particles = p;
p->die = cl.time + 2 + (rand()&31) * 0.02;
p->color = 224 + (rand()&7);
p->type = pt_grav;
dir[0] = j*8 + (rand()&7);
dir[1] = i*8 + (rand()&7);
dir[2] = 256;
p->org[0] = org[0] + dir[0];
p->org[1] = org[1] + dir[1];
p->org[2] = org[2] + (rand()&63);
VectorNormalize (dir);
vel = 50 + (rand()&63);
VectorScale (dir, vel, p->vel);
}
}
/*
===============
R_TeleportSplash
===============
*/
void R_TeleportSplash (vec3_t org)
{
int i, j, k;
particle_t *p;
float vel;
vec3_t dir;
for (i=-16 ; i<16 ; i+=4)
for (j=-16 ; j<16 ; j+=4)
for (k=-24 ; k<32 ; k+=4)
{
if (!free_particles)
return;
p = free_particles;
free_particles = p->next;
p->next = active_particles;
active_particles = p;
p->die = cl.time + 0.2 + (rand()&7) * 0.02;
p->color = 7 + (rand()&7);
p->type = pt_grav;
dir[0] = j*8;
dir[1] = i*8;
dir[2] = k*8;
p->org[0] = org[0] + i + (rand()&3);
p->org[1] = org[1] + j + (rand()&3);
p->org[2] = org[2] + k + (rand()&3);
VectorNormalize (dir);
vel = 50 + (rand()&63);
VectorScale (dir, vel, p->vel);
}
}
void R_RocketTrail (vec3_t start, vec3_t end, int type)
{
vec3_t vec;
float len;
int j;
particle_t *p;
VectorSubtract (end, start, vec);
len = VectorNormalize (vec);
while (len > 0)
{
len -= 3;
if (!free_particles)
return;
p = free_particles;
free_particles = p->next;
p->next = active_particles;
active_particles = p;
VectorCopy (vec3_origin, p->vel);
p->die = cl.time + 2;
if (type == 4)
{ // slight blood
p->type = pt_slowgrav;
p->color = 67 + (rand()&3);
for (j=0 ; j<3 ; j++)
p->org[j] = start[j] + ((rand()%6)-3);
len -= 3;
}
else if (type == 2)
{ // blood
p->type = pt_slowgrav;
p->color = 67 + (rand()&3);
for (j=0 ; j<3 ; j++)
p->org[j] = start[j] + ((rand()%6)-3);
}
else if (type == 6)
{ // voor trail
p->color = 9*16 + 8 + (rand()&3);
p->type = pt_static;
p->die = cl.time + 0.3;
for (j=0 ; j<3 ; j++)
p->org[j] = start[j] + ((rand()&15)-8);
}
else if (type == 1)
{ // smoke smoke
p->ramp = (rand()&3) + 2;
p->color = ramp3[(int)p->ramp];
p->type = pt_fire;
for (j=0 ; j<3 ; j++)
p->org[j] = start[j] + ((rand()%6)-3);
}
else if (type == 0)
{ // rocket trail
p->ramp = (rand()&3);
p->color = ramp3[(int)p->ramp];
p->type = pt_fire;
for (j=0 ; j<3 ; j++)
p->org[j] = start[j] + ((rand()%6)-3);
}
else if (type == 3 || type == 5)
{ // tracer
static int tracercount;
p->die = cl.time + 0.5;
p->type = pt_static;
if (type == 3)
p->color = 52 + ((tracercount&4)<<1);
else
p->color = 230 + ((tracercount&4)<<1);
tracercount++;
VectorCopy (start, p->org);
if (tracercount & 1)
{
p->vel[0] = 30*vec[1];
p->vel[1] = 30*-vec[0];
}
else
{
p->vel[0] = 30*-vec[1];
p->vel[1] = 30*vec[0];
}
}
VectorAdd (start, vec, start);
}
}
/*
===============
R_DrawParticles
===============
*/
void R_DrawParticles (void)
{
particle_t *p, *kill;
float grav;
int i;
float time2, time3;
float time1;
float dvel;
float frametime;
#ifdef GLQUAKE
unsigned char *at;
unsigned char theAlpha;
vec3_t up, right;
float scale;
qboolean alphaTestEnabled;
GL_Bind(particletexture);
alphaTestEnabled = glIsEnabled(GL_ALPHA_TEST);
if (alphaTestEnabled)
glDisable(GL_ALPHA_TEST);
glEnable (GL_BLEND);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBegin (GL_TRIANGLES);
VectorScale (vup, 1.5, up);
VectorScale (vright, 1.5, right);
#else
D_StartParticles ();
VectorScale (vright, xscaleshrink, r_pright);
VectorScale (vup, yscaleshrink, r_pup);
VectorCopy (vpn, r_ppn);
#endif
frametime = host_frametime;
time3 = frametime * 15;
time2 = frametime * 10; // 15;
time1 = frametime * 5;
grav = frametime * 800 * 0.05;
dvel = 4*frametime;
for ( ;; )
{
kill = active_particles;
if (kill && kill->die < cl.time)
{
active_particles = kill->next;
kill->next = free_particles;
free_particles = kill;
continue;
}
break;
}
for (p=active_particles ; p ; p=p->next)
{
for ( ;; )
{
kill = p->next;
if (kill && kill->die < cl.time)
{
p->next = kill->next;
kill->next = free_particles;
free_particles = kill;
continue;
}
break;
}
#ifdef GLQUAKE
// hack a scale up to keep particles from disapearing
scale = (p->org[0] - r_origin[0])*vpn[0] + (p->org[1] - r_origin[1])*vpn[1]
+ (p->org[2] - r_origin[2])*vpn[2];
if (scale < 20)
scale = 1;
else
scale = 1 + scale * 0.004;
at = (byte *)&d_8to24table[(int)p->color];
if (p->type==pt_fire)
theAlpha = 255*(6-p->ramp)/6;
// theAlpha = 192;
// else if (p->type==pt_explode || p->type==pt_explode2)
// theAlpha = 255*(8-p->ramp)/8;
else
theAlpha = 255;
glColor4ub (*at, *(at+1), *(at+2), theAlpha);
// glColor3ubv (at);
// glColor3ubv ((byte *)&d_8to24table[(int)p->color]);
glTexCoord2f (0,0);
glVertex3fv (p->org);
glTexCoord2f (1,0);
glVertex3f (p->org[0] + up[0]*scale, p->org[1] + up[1]*scale, p->org[2] + up[2]*scale);
glTexCoord2f (0,1);
glVertex3f (p->org[0] + right[0]*scale, p->org[1] + right[1]*scale, p->org[2] + right[2]*scale);
#else
D_DrawParticle (p);
#endif
p->org[0] += p->vel[0]*frametime;
p->org[1] += p->vel[1]*frametime;
p->org[2] += p->vel[2]*frametime;
switch (p->type)
{
case pt_static:
break;
case pt_fire:
p->ramp += time1;
if (p->ramp >= 6)
p->die = -1;
else
p->color = ramp3[(int)p->ramp];
p->vel[2] += grav;
break;
case pt_explode:
p->ramp += time2;
if (p->ramp >=8)
p->die = -1;
else
p->color = ramp1[(int)p->ramp];
for (i=0 ; i<3 ; i++)
p->vel[i] += p->vel[i]*dvel;
p->vel[2] -= grav;
break;
case pt_explode2:
p->ramp += time3;
if (p->ramp >=8)
p->die = -1;
else
p->color = ramp2[(int)p->ramp];
for (i=0 ; i<3 ; i++)
p->vel[i] -= p->vel[i]*frametime;
p->vel[2] -= grav;
break;
case pt_blob:
for (i=0 ; i<3 ; i++)
p->vel[i] += p->vel[i]*dvel;
p->vel[2] -= grav;
break;
case pt_blob2:
for (i=0 ; i<2 ; i++)
p->vel[i] -= p->vel[i]*dvel;
p->vel[2] -= grav;
break;
case pt_slowgrav:
case pt_grav:
p->vel[2] -= grav;
break;
}
}
#ifdef GLQUAKE
glEnd ();
glDisable (GL_BLEND);
if (alphaTestEnabled)
glEnable(GL_ALPHA_TEST);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
#else
D_EndParticles ();
#endif
}
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