cg_marks.c

quakeIII源码这个不用我多说吧

	active_particles = p;
	p->time = cg.time;
	p->alpha = 1.0;
	p->alphavel = 0;
	p->roll = 0;

	p->pshader = pshader;

	p->endtime = cg.time + duration;
	
	if (fleshEntityNum)
		p->startfade = cg.time;
	else
		p->startfade = cg.time + 100;

	p->width = 4;
	p->height = 4;

	p->endheight = 4+rand()%3;
	p->endwidth = p->endheight;

	p->type = P_SMOKE;

	VectorCopy( start, p->org );
	p->vel[0] = 0;
	p->vel[1] = 0;
	p->vel[2] = -20;
	VectorClear( p->accel );

	p->rotate = qfalse;

	p->roll = rand()%179;
	
	p->color = BLOODRED;
	p->alpha = 0.75;

}

void CG_Particle_OilParticle (qhandle_t pshader, centity_t *cent)
{
	cparticle_t	*p;

	int			time;
	int			time2;
	float		ratio;

	float	duration = 1500;

	time = cg.time;
	time2 = cg.time + cent->currentState.time;

	ratio =(float)1 - ((float)time / (float)time2);

	if (!pshader)
		CG_Printf ("CG_Particle_OilParticle == ZERO!\n");

	if (!free_particles)
		return;
	p = free_particles;
	free_particles = p->next;
	p->next = active_particles;
	active_particles = p;
	p->time = cg.time;
	p->alpha = 1.0;
	p->alphavel = 0;
	p->roll = 0;

	p->pshader = pshader;

	p->endtime = cg.time + duration;
	
	p->startfade = p->endtime;

	p->width = 1;
	p->height = 3;

	p->endheight = 3;
	p->endwidth = 1;

	p->type = P_SMOKE;

	VectorCopy(cent->currentState.origin, p->org );	
	
	p->vel[0] = (cent->currentState.origin2[0] * (16 * ratio));
	p->vel[1] = (cent->currentState.origin2[1] * (16 * ratio));
	p->vel[2] = (cent->currentState.origin2[2]);

	p->snum = 1.0f;

	VectorClear( p->accel );

	p->accel[2] = -20;

	p->rotate = qfalse;

	p->roll = rand()%179;
	
	p->alpha = 0.75;

}


void CG_Particle_OilSlick (qhandle_t pshader, centity_t *cent)
{
	cparticle_t	*p;
	
  	if (!pshader)
		CG_Printf ("CG_Particle_OilSlick == ZERO!\n");

	if (!free_particles)
		return;
	p = free_particles;
	free_particles = p->next;
	p->next = active_particles;
	active_particles = p;
	p->time = cg.time;
	
	if (cent->currentState.angles2[2])
		p->endtime = cg.time + cent->currentState.angles2[2];
	else
		p->endtime = cg.time + 60000;

	p->startfade = p->endtime;

	p->alpha = 1.0;
	p->alphavel = 0;
	p->roll = 0;

	p->pshader = pshader;

	if (cent->currentState.angles2[0] || cent->currentState.angles2[1])
	{
		p->width = cent->currentState.angles2[0];
		p->height = cent->currentState.angles2[0];

		p->endheight = cent->currentState.angles2[1];
		p->endwidth = cent->currentState.angles2[1];
	}
	else
	{
		p->width = 8;
		p->height = 8;

		p->endheight = 16;
		p->endwidth = 16;
	}

	p->type = P_FLAT_SCALEUP;

	p->snum = 1.0;

	VectorCopy(cent->currentState.origin, p->org );
	
	p->org[2]+= 0.55 + (crandom() * 0.5);

	p->vel[0] = 0;
	p->vel[1] = 0;
	p->vel[2] = 0;
	VectorClear( p->accel );

	p->rotate = qfalse;

	p->roll = rand()%179;
	
	p->alpha = 0.75;

}

void CG_OilSlickRemove (centity_t *cent)
{
	cparticle_t		*p, *next;
	int				id;

	id = 1.0f;

	if (!id)
		CG_Printf ("CG_OilSlickRevove NULL id\n");

	for (p=active_particles ; p ; p=next)
	{
		next = p->next;
		
		if (p->type == P_FLAT_SCALEUP)
		{
			if (p->snum == id)
			{
				p->endtime = cg.time + 100;
				p->startfade = p->endtime;
				p->type = P_FLAT_SCALEUP_FADE;

			}
		}

	}
}

qboolean ValidBloodPool (vec3_t start)
{
#define EXTRUDE_DIST	0.5

	vec3_t	angles;
	vec3_t	right, up;
	vec3_t	this_pos, x_pos, center_pos, end_pos;
	float	x, y;
	float	fwidth, fheight;
	trace_t	trace;
	vec3_t	normal;

	fwidth = 16;
	fheight = 16;

	VectorSet (normal, 0, 0, 1);

	vectoangles (normal, angles);
	AngleVectors (angles, NULL, right, up);

	VectorMA (start, EXTRUDE_DIST, normal, center_pos);

	for (x= -fwidth/2; x<fwidth; x+= fwidth)
	{
		VectorMA (center_pos, x, right, x_pos);

		for (y= -fheight/2; y<fheight; y+= fheight)
		{
			VectorMA (x_pos, y, up, this_pos);
			VectorMA (this_pos, -EXTRUDE_DIST*2, normal, end_pos);
			
			CG_Trace (&trace, this_pos, NULL, NULL, end_pos, -1, CONTENTS_SOLID);

			
			if (trace.entityNum < (MAX_ENTITIES - 1)) // may only land on world
				return qfalse;

			if (!(!trace.startsolid && trace.fraction < 1))
				return qfalse;
		
		}
	}

	return qtrue;
}

void CG_BloodPool (localEntity_t *le, qhandle_t pshader, trace_t *tr)
{	
	cparticle_t	*p;
	qboolean	legit;
	vec3_t		start;
	float		rndSize;
	
	if (!pshader)
		CG_Printf ("CG_BloodPool pshader == ZERO!\n");

	if (!free_particles)
		return;
	
	VectorCopy (tr->endpos, start);
	legit = ValidBloodPool (start);

	if (!legit) 
		return;

	p = free_particles;
	free_particles = p->next;
	p->next = active_particles;
	active_particles = p;
	p->time = cg.time;
	
	p->endtime = cg.time + 3000;
	p->startfade = p->endtime;

	p->alpha = 1.0;
	p->alphavel = 0;
	p->roll = 0;

	p->pshader = pshader;

	rndSize = 0.4 + random()*0.6;

	p->width = 8*rndSize;
	p->height = 8*rndSize;

	p->endheight = 16*rndSize;
	p->endwidth = 16*rndSize;
	
	p->type = P_FLAT_SCALEUP;

	VectorCopy(start, p->org );
	
	p->vel[0] = 0;
	p->vel[1] = 0;
	p->vel[2] = 0;
	VectorClear( p->accel );

	p->rotate = qfalse;

	p->roll = rand()%179;
	
	p->alpha = 0.75;
	
	p->color = BLOODRED;
}

#define NORMALSIZE	16
#define LARGESIZE	32

void CG_ParticleBloodCloud (centity_t *cent, vec3_t origin, vec3_t dir)
{
	float	length;
	float	dist;
	float	crittersize;
	vec3_t	angles, forward;
	vec3_t	point;
	cparticle_t	*p;
	int		i;
	
	dist = 0;

	length = VectorLength (dir);
	vectoangles (dir, angles);
	AngleVectors (angles, forward, NULL, NULL);

	crittersize = LARGESIZE;

	if (length)
		dist = length / crittersize;

	if (dist < 1)
		dist = 1;

	VectorCopy (origin, point);

	for (i=0; i<dist; i++)
	{
		VectorMA (point, crittersize, forward, point);	
		
		if (!free_particles)
			return;

		p = free_particles;
		free_particles = p->next;
		p->next = active_particles;
		active_particles = p;

		p->time = cg.time;
		p->alpha = 1.0;
		p->alphavel = 0;
		p->roll = 0;

		p->pshader = cgs.media.smokePuffShader;

		p->endtime = cg.time + 350 + (crandom() * 100);
		
		p->startfade = cg.time;
		
		p->width = LARGESIZE;
		p->height = LARGESIZE;
		p->endheight = LARGESIZE;
		p->endwidth = LARGESIZE;

		p->type = P_SMOKE;

		VectorCopy( origin, p->org );
		
		p->vel[0] = 0;
		p->vel[1] = 0;
		p->vel[2] = -1;
		
		VectorClear( p->accel );

		p->rotate = qfalse;

		p->roll = rand()%179;
		
		p->color = BLOODRED;
		
		p->alpha = 0.75;
		
	}

	
}

void CG_ParticleSparks (vec3_t org, vec3_t vel, int duration, float x, float y, float speed)
{
	cparticle_t	*p;

	if (!free_particles)
		return;
	p = free_particles;
	free_particles = p->next;
	p->next = active_particles;
	active_particles = p;
	p->time = cg.time;
	
	p->endtime = cg.time + duration;
	p->startfade = cg.time + duration/2;
	
	p->color = EMISIVEFADE;
	p->alpha = 0.4f;
	p->alphavel = 0;

	p->height = 0.5;
	p->width = 0.5;
	p->endheight = 0.5;
	p->endwidth = 0.5;

	p->pshader = cgs.media.tracerShader;

	p->type = P_SMOKE;
	
	VectorCopy(org, p->org);

	p->org[0] += (crandom() * x);
	p->org[1] += (crandom() * y);

	p->vel[0] = vel[0];
	p->vel[1] = vel[1];
	p->vel[2] = vel[2];

	p->accel[0] = p->accel[1] = p->accel[2] = 0;

	p->vel[0] += (crandom() * 4);
	p->vel[1] += (crandom() * 4);
	p->vel[2] += (20 + (crandom() * 10)) * speed;	

	p->accel[0] = crandom () * 4;
	p->accel[1] = crandom () * 4;
	
}

void CG_ParticleDust (centity_t *cent, vec3_t origin, vec3_t dir)
{
	float	length;
	float	dist;
	float	crittersize;
	vec3_t	angles, forward;
	vec3_t	point;
	cparticle_t	*p;
	int		i;
	
	dist = 0;

	VectorNegate (dir, dir);
	length = VectorLength (dir);
	vectoangles (dir, angles);
	AngleVectors (angles, forward, NULL, NULL);

	crittersize = LARGESIZE;

	if (length)
		dist = length / crittersize;

	if (dist < 1)
		dist = 1;

	VectorCopy (origin, point);

	for (i=0; i<dist; i++)
	{
		VectorMA (point, crittersize, forward, point);	
				
		if (!free_particles)
			return;

		p = free_particles;
		free_particles = p->next;
		p->next = active_particles;
		active_particles = p;

		p->time = cg.time;
		p->alpha = 5.0;
		p->alphavel = 0;
		p->roll = 0;

		p->pshader = cgs.media.smokePuffShader;

		// RF, stay around for long enough to expand and dissipate naturally
		if (length)
			p->endtime = cg.time + 4500 + (crandom() * 3500);
		else
			p->endtime = cg.time + 750 + (crandom() * 500);
		
		p->startfade = cg.time;
		
		p->width = LARGESIZE;
		p->height = LARGESIZE;

		// RF, expand while falling
		p->endheight = LARGESIZE*3.0;
		p->endwidth = LARGESIZE*3.0;

		if (!length)
		{
			p->width *= 0.2f;
			p->height *= 0.2f;

			p->endheight = NORMALSIZE;
			p->endwidth = NORMALSIZE;
		}

		p->type = P_SMOKE;

		VectorCopy( point, p->org );
		
		p->vel[0] = crandom()*6;
		p->vel[1] = crandom()*6;
		p->vel[2] = random()*20;

		// RF, add some gravity/randomness
		p->accel[0] = crandom()*3;
		p->accel[1] = crandom()*3;
		p->accel[2] = -PARTICLE_GRAVITY*0.4;

		VectorClear( p->accel );

		p->rotate = qfalse;

		p->roll = rand()%179;
		
		p->alpha = 0.75;
		
	}

	
}

void CG_ParticleMisc (qhandle_t pshader, vec3_t origin, int size, int duration, float alpha)
{
	cparticle_t	*p;

	if (!pshader)
		CG_Printf ("CG_ParticleImpactSmokePuff pshader == ZERO!\n");

	if (!free_particles)
		return;

	p = free_particles;
	free_particles = p->next;
	p->next = active_particles;
	active_particles = p;
	p->time = cg.time;
	p->alpha = 1.0;
	p->alphavel = 0;
	p->roll = rand()%179;

	p->pshader = pshader;

	if (duration > 0)
		p->endtime = cg.time + duration;
	else
		p->endtime = duration;

	p->startfade = cg.time;

	p->width = size;
	p->height = size;

	p->endheight = size;
	p->endwidth = size;

	p->type = P_SPRITE;

	VectorCopy( origin, p->org );

	p->rotate = qfalse;
}