void CL_DrawParticles( void )
{
particle_t *p, *kill;
float frametime;
static int framecount = -1;
if( !cl_draw_particles->integer )
return;
// HACKHACK: don't evaluate particles when executes many times at same frame
// e.g. mirror rendering
if( framecount != tr.realframecount )
{
frametime = cl.time - cl.oldtime;
framecount = tr.realframecount;
}
else frametime = 0.0f;
if( tracerred->modified || tracergreen->modified || tracerblue->modified )
{
gTracerColors[4][0] = (byte)(tracerred->value * 255);
gTracerColors[4][1] = (byte)(tracergreen->value * 255);
gTracerColors[4][2] = (byte)(tracerblue->value * 255);
tracerred->modified = tracergreen->modified = tracerblue->modified = false;
}
while( 1 )
{
// free time-expired particles
kill = cl_active_particles;
if( kill && kill->die < cl.time )
{
cl_active_particles = kill->next;
CL_FreeParticle( kill );
continue;
}
break;
}
for( p = cl_active_particles; p; p = p->next )
{
while( 1 )
{
kill = p->next;
if( kill && kill->die < cl.time )
{
p->next = kill->next;
CL_FreeParticle( kill );
continue;
}
break;
}
CL_UpdateParticle( p, frametime );
}
}
/*
===============
CL_AddParticles
===============
*/
void CL_AddParticles (void)
{
cparticle_t *p, *next;
float alpha;
float time, time2;
vec3_t org;
int color;
cparticle_t *active, *tail;
int contents;
float grav;
active = NULL;
tail = NULL;
if (!cl_drawParticles->integer)
return;
// allow gravity tweaks by the server
grav = Cvar_VariableValue("sv_gravity");
if (!grav)
grav = 1;
else
grav /= 800;
for (p = active_particles; p; p = next)
{
next = p->next;
// set alpha
// PMM - added INSTANT_PARTICLE handling
if (p->alphavel != INSTANT_PARTICLE)
{
time = (cl.time - p->time) * 0.001;
alpha = p->alpha + time * p->alphavel;
if (alpha <= 0)
{
// faded out
CL_FreeParticle (p);
continue;
}
else if (alpha <= 0.3f && p->color == 240) // this is HACK central...
{
// do blood decals
if (rand() & 4)
{
trace_t tr;
time2 = time * time;
org[0] = p->org[0] + p->vel[0] * time + p->accel[0] * time2;
org[1] = p->org[1] + p->vel[1] * time + p->accel[1] * time2;
org[2] = p->org[2] + p->vel[2] * time + p->accel[2] * time2;
tr = CL_Trace(p->org, org, 0, MASK_SOLID);
if (tr.fraction != 1.0f)
{
if (!VectorCompare(tr.plane.normal, vec3_origin) && !(CM_PointContents(p->org, 0) & MASK_WATER)) // no blood splatters underwater...
{
vec4_t color;
Vector4Set(color, 1.0, 0.0, 0.0, 1.0f);
RE_AddDecal(tr.endpos, tr.plane.normal, color, 16 + ((rand() % 21 * 0.05f) - 0.5f), DECAL_BLOOD + (rand() & 4), 0, frand() * 360);
}
}
}
}
}
else
{
alpha = p->alpha;
}
if (alpha > 1.0)
alpha = 1;
// set color
color = p->color;
// backup old position
VectorCopy (p->org, p->oldOrg);
// calculate new position
time2 = time * time;
org[0] = p->org[0] + p->vel[0] * time + p->accel[0] * time2;
org[1] = p->org[1] + p->vel[1] * time + p->accel[1] * time2;
org[2] = p->org[2] + p->vel[2] * time + p->accel[2] * time2;
// gravity modulation
//if (!p->ignoreGrav)
// org[2] += time2 * -PARTICLE_GRAVITY;
// collision test
if (cl_particleCollision->integer)
{
if (p->bounceFactor)
{
trace_t trace;
vec3_t vel;
int hitTime;
float time;
trace = CL_Trace(p->oldOrg, org, 0, CONTENTS_SOLID);
if (trace.fraction > 0 && trace.fraction < 1)
{
// reflect the velocity on the trace plane
hitTime = cl.time - cls.rframetime + cls.rframetime * trace.fraction;
time = ((float)hitTime - p->time) * 0.001;
Vector3Set (vel, p->vel[0], p->vel[1], p->vel[2] + p->accel[2] * time * grav);
VectorReflect (vel, trace.plane.normal, p->vel);
VectorScale (p->vel, p->bounceFactor, p->vel);
// check for stop, making sure that even on low FPS systems it doesn't bobble
if (trace.allsolid || (trace.plane.normal[2] > 0 && (p->vel[2] < 40 || p->vel[2] < -cls.rframetime * p->vel[2])))
{
VectorClear(p->vel);
VectorClear(p->accel);
p->bounceFactor = 0.0f;
}
VectorCopy (trace.endpos, org);
// reset particle
p->time = cl.time;
VectorCopy (org, p->org);
}
}
}
// kill all particles in solid
contents = CM_PointContents (org, 0);
if (contents & MASK_SOLID)
{
CL_FreeParticle (p);
continue;
}
// have this always below CL_FreeParticle(p); !
p->next = NULL;
if (!tail)
{
active = tail = p;
}
else
{
tail->next = p;
tail = p;
}
// add to scene
V_AddParticle (org, color, alpha);
// PMM
if (p->alphavel == INSTANT_PARTICLE)
{
p->alphavel = 0.0;
p->alpha = 0.0;
}
}
active_particles = active;
}
