cl_fx.c

著名游戏quake2原代码最新版本(vc6.0可以编译的)

			return;
		p = free_particles;
		free_particles = p->next;
		p->next = active_particles;
		active_particles = p;
		VectorClear (p->accel);

		p->time = cl.time;
		p->alpha = 0.5;
		p->alphavel = -1.0 / (0.3 + frand() * 0.2);
		p->color = 0xe4 + (rand()&3);

		for (j=0; j<3; j++)
		{
			p->org[j] = move[j];
			p->accel[j] = 0;
		}
		if (left)
		{
			left = 0;
			p->vel[0] = 10;
		}
		else 
		{
			left = 1;
			p->vel[0] = -10;
		}

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

		VectorAdd (move, vec, move);
	}
}


/*
===============
CL_BubbleTrail

===============
*/
void CL_BubbleTrail (vec3_t start, vec3_t end)
{
	vec3_t		move;
	vec3_t		vec;
	float		len;
	int			i, j;
	cparticle_t	*p;
	float		dec;

	VectorCopy (start, move);
	VectorSubtract (end, start, vec);
	len = VectorNormalize (vec);

	dec = 32;
	VectorScale (vec, dec, vec);

	for (i=0 ; i<len ; i+=dec)
	{
		if (!free_particles)
			return;

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

		VectorClear (p->accel);
		p->time = cl.time;

		p->alpha = 1.0;
		p->alphavel = -1.0 / (1+frand()*0.2);
		p->color = 4 + (rand()&7);
		for (j=0 ; j<3 ; j++)
		{
			p->org[j] = move[j] + crand()*2;
			p->vel[j] = crand()*5;
		}
		p->vel[2] += 6;

		VectorAdd (move, vec, move);
	}
}


/*
===============
CL_FlyParticles
===============
*/

#define	BEAMLENGTH			16
void CL_FlyParticles (vec3_t origin, int count)
{
	int			i;
	cparticle_t	*p;
	float		angle;
	float		sr, sp, sy, cr, cp, cy;
	vec3_t		forward;
	float		dist = 64;
	float		ltime;


	if (count > NUMVERTEXNORMALS)
		count = NUMVERTEXNORMALS;

	if (!avelocities[0][0])
	{
		for (i=0 ; i<NUMVERTEXNORMALS*3 ; i++)
			avelocities[0][i] = (rand()&255) * 0.01;
	}


	ltime = (float)cl.time / 1000.0;
	for (i=0 ; i<count ; i+=2)
	{
		angle = ltime * avelocities[i][0];
		sy = sin(angle);
		cy = cos(angle);
		angle = ltime * avelocities[i][1];
		sp = sin(angle);
		cp = cos(angle);
		angle = ltime * avelocities[i][2];
		sr = sin(angle);
		cr = cos(angle);
	
		forward[0] = cp*cy;
		forward[1] = cp*sy;
		forward[2] = -sp;

		if (!free_particles)
			return;
		p = free_particles;
		free_particles = p->next;
		p->next = active_particles;
		active_particles = p;

		p->time = cl.time;

		dist = sin(ltime + i)*64;
		p->org[0] = origin[0] + bytedirs[i][0]*dist + forward[0]*BEAMLENGTH;
		p->org[1] = origin[1] + bytedirs[i][1]*dist + forward[1]*BEAMLENGTH;
		p->org[2] = origin[2] + bytedirs[i][2]*dist + forward[2]*BEAMLENGTH;

		VectorClear (p->vel);
		VectorClear (p->accel);

		p->color = 0;
		p->colorvel = 0;

		p->alpha = 1;
		p->alphavel = -100;
	}
}

void CL_FlyEffect (centity_t *ent, vec3_t origin)
{
	int		n;
	int		count;
	int		starttime;

	if (ent->fly_stoptime < cl.time)
	{
		starttime = cl.time;
		ent->fly_stoptime = cl.time + 60000;
	}
	else
	{
		starttime = ent->fly_stoptime - 60000;
	}

	n = cl.time - starttime;
	if (n < 20000)
		count = n * 162 / 20000.0;
	else
	{
		n = ent->fly_stoptime - cl.time;
		if (n < 20000)
			count = n * 162 / 20000.0;
		else
			count = 162;
	}

	CL_FlyParticles (origin, count);
}


/*
===============
CL_BfgParticles
===============
*/

#define	BEAMLENGTH			16
void CL_BfgParticles (entity_t *ent)
{
	int			i;
	cparticle_t	*p;
	float		angle;
	float		sr, sp, sy, cr, cp, cy;
	vec3_t		forward;
	float		dist = 64;
	vec3_t		v;
	float		ltime;
	
	if (!avelocities[0][0])
	{
		for (i=0 ; i<NUMVERTEXNORMALS*3 ; i++)
			avelocities[0][i] = (rand()&255) * 0.01;
	}


	ltime = (float)cl.time / 1000.0;
	for (i=0 ; i<NUMVERTEXNORMALS ; i++)
	{
		angle = ltime * avelocities[i][0];
		sy = sin(angle);
		cy = cos(angle);
		angle = ltime * avelocities[i][1];
		sp = sin(angle);
		cp = cos(angle);
		angle = ltime * avelocities[i][2];
		sr = sin(angle);
		cr = cos(angle);
	
		forward[0] = cp*cy;
		forward[1] = cp*sy;
		forward[2] = -sp;

		if (!free_particles)
			return;
		p = free_particles;
		free_particles = p->next;
		p->next = active_particles;
		active_particles = p;

		p->time = cl.time;

		dist = sin(ltime + i)*64;
		p->org[0] = ent->origin[0] + bytedirs[i][0]*dist + forward[0]*BEAMLENGTH;
		p->org[1] = ent->origin[1] + bytedirs[i][1]*dist + forward[1]*BEAMLENGTH;
		p->org[2] = ent->origin[2] + bytedirs[i][2]*dist + forward[2]*BEAMLENGTH;

		VectorClear (p->vel);
		VectorClear (p->accel);

		VectorSubtract (p->org, ent->origin, v);
		dist = VectorLength(v) / 90.0;
		p->color = floor (0xd0 + dist * 7);
		p->colorvel = 0;

		p->alpha = 1.0 - dist;
		p->alphavel = -100;
	}
}


/*
===============
CL_TrapParticles
===============
*/
// RAFAEL
void CL_TrapParticles (entity_t *ent)
{
	vec3_t		move;
	vec3_t		vec;
	vec3_t		start, end;
	float		len;
	int			j;
	cparticle_t	*p;
	int			dec;

	ent->origin[2]-=14;
	VectorCopy (ent->origin, start);
	VectorCopy (ent->origin, end);
	end[2]+=64;

	VectorCopy (start, move);
	VectorSubtract (end, start, vec);
	len = VectorNormalize (vec);

	dec = 5;
	VectorScale (vec, 5, vec);

	// FIXME: this is a really silly way to have a loop
	while (len > 0)
	{
		len -= dec;

		if (!free_particles)
			return;
		p = free_particles;
		free_particles = p->next;
		p->next = active_particles;
		active_particles = p;
		VectorClear (p->accel);
		
		p->time = cl.time;

		p->alpha = 1.0;
		p->alphavel = -1.0 / (0.3+frand()*0.2);
		p->color = 0xe0;
		for (j=0 ; j<3 ; j++)
		{
			p->org[j] = move[j] + crand();
			p->vel[j] = crand()*15;
			p->accel[j] = 0;
		}
		p->accel[2] = PARTICLE_GRAVITY;

		VectorAdd (move, vec, move);
	}

	{

	
	int			i, j, k;
	cparticle_t	*p;
	float		vel;
	vec3_t		dir;
	vec3_t		org;

	
	ent->origin[2]+=14;
	VectorCopy (ent->origin, org);


	for (i=-2 ; i<=2 ; i+=4)
		for (j=-2 ; j<=2 ; j+=4)
			for (k=-2 ; k<=4 ; k+=4)
			{
				if (!free_particles)
					return;
				p = free_particles;
				free_particles = p->next;
				p->next = active_particles;
				active_particles = p;

				p->time = cl.time;
				p->color = 0xe0 + (rand()&3);

				p->alpha = 1.0;
				p->alphavel = -1.0 / (0.3 + (rand()&7) * 0.02);
				
				p->org[0] = org[0] + i + ((rand()&23) * crand());
				p->org[1] = org[1] + j + ((rand()&23) * crand());
				p->org[2] = org[2] + k + ((rand()&23) * crand());
	
				dir[0] = j * 8;
				dir[1] = i * 8;
				dir[2] = k * 8;
	
				VectorNormalize (dir);						
				vel = 50 + rand()&63;
				VectorScale (dir, vel, p->vel);

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


/*
===============
CL_BFGExplosionParticles
===============
*/
//FIXME combined with CL_ExplosionParticles
void CL_BFGExplosionParticles (vec3_t org)
{
	int			i, j;
	cparticle_t	*p;

	for (i=0 ; i<256 ; i++)
	{
		if (!free_particles)
			return;
		p = free_particles;
		free_particles = p->next;
		p->next = active_particles;
		active_particles = p;

		p->time = cl.time;
		p->color = 0xd0 + (rand()&7);

		for (j=0 ; j<3 ; j++)
		{
			p->org[j] = org[j] + ((rand()%32)-16);
			p->vel[j] = (rand()%384)-192;
		}

		p->accel[0] = p->accel[1] = 0;
		p->accel[2] = -PARTICLE_GRAVITY;
		p->alpha = 1.0;

		p->alphavel = -0.8 / (0.5 + frand()*0.3);
	}
}


/*
===============
CL_TeleportParticles

===============
*/
void CL_TeleportParticles (vec3_t org)
{
	int			i, j, k;
	cparticle_t	*p;
	float		vel;
	vec3_t		dir;

	for (i=-16 ; i<=16 ; i+=4)
		for (j=-16 ; j<=16 ; j+=4)
			for (k=-16 ; k<=32 ; k+=4)
			{
				if (!free_particles)
					return;
				p = free_particles;
				free_particles = p->next;
				p->next = active_particles;
				active_particles = p;

				p->time = cl.time;
				p->color = 7 + (rand()&7);

				p->alpha = 1.0;
				p->alphavel = -1.0 / (0.3 + (rand()&7) * 0.02);
				
				p->org[0] = org[0] + i + (rand()&3);
				p->org[1] = org[1] + j + (rand()&3);
				p->org[2] = org[2] + k + (rand()&3);
	
				dir[0] = j*8;
				dir[1] = i*8;
				dir[2] = k*8;
	
				VectorNormalize (dir);						
				vel = 50 + (rand()&63);
				VectorScale (dir, vel, p->vel);

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


/*
===============
CL_AddParticles
===============
*/
void CL_AddParticles (void)
{
	cparticle_t		*p, *next;
	float			alpha;
	float			time, time2;
	vec3_t			org;
	int				color;
	cparticle_t		*active, *tail;

	active = NULL;
	tail = NULL;

	for (p=active_particles ; p ; p=next)
	{
		next = p->next;

		// PMM - added INSTANT_PARTICLE handling for heat beam
		if (p->alphavel != INSTANT_PARTICLE)
		{
			time = (cl.time - p->time)*0.001;
			alpha = p->alpha + time*p->alphavel;
			if (alpha <= 0)
			{	// faded out
				p->next = free_particles;
				free_particles = p;
				continue;
			}
		}
		else
		{
			alpha = p->alpha;
		}

		p->next = NULL;
		if (!tail)
			active = tail = p;
		else
		{
			tail->next = p;
			tail = p;
		}

		if (alpha > 1.0)
			alpha = 1;
		color = p->color;

		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;

		V_AddParticle (org, color, alpha);
		// PMM
		if (p->alphavel == INSTANT_PARTICLE)
		{
			p->alphavel = 0.0;
			p->alpha = 0.0;
		}
	}

	active_particles = active;
}


/*
==============
CL_EntityEvent

An entity has just been parsed that has an event value

the female events are there for backwards compatability
==============
*/
extern struct sfx_s	*cl_sfx_footsteps[4];

void CL_EntityEvent (entity_state_t *ent)
{
	switch (ent->event)
	{
	case EV_ITEM_RESPAWN:
		S_StartSound (NULL, ent->number, CHAN_WEAPON, S_RegisterSound("items/respawn1.wav"), 1, ATTN_IDLE, 0);
		CL_ItemRespawnParticles (ent->origin);
		break;
	case EV_PLAYER_TELEPORT:
		S_StartSound (NULL, ent->number, CHAN_WEAPON, S_RegisterSound("misc/tele1.wav"), 1, ATTN_IDLE, 0);
		CL_TeleportParticles (ent->origin);
		break;
	case EV_FOOTSTEP:
		if (cl_footsteps->value)
			S_StartSound (NULL, ent->number, CHAN_BODY, cl_sfx_footsteps[rand()&3], 1, ATTN_NORM, 0);
		break;
	case EV_FALLSHORT:
		S_StartSound (NULL, ent->number, CHAN_AUTO, S_RegisterSound ("player/land1.wav"), 1, ATTN_NORM, 0);
		break;
	case EV_FALL:
		S_StartSound (NULL, ent->number, CHAN_AUTO, S_RegisterSound ("*fall2.wav"), 1, ATTN_NORM, 0);
		break;
	case EV_FALLFAR:
		S_StartSound (NULL, ent->number, CHAN_AUTO, S_RegisterSound ("*fall1.wav"), 1, ATTN_NORM, 0);
		break;
	}
}


/*
==============
CL_ClearEffects

==============
*/
void CL_ClearEffects (void)
{
	CL_ClearParticles ();
	CL_ClearDlights ();
	CL_ClearLightStyles ();
}