/*
	r_part.c

	@description@

	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

#include "r_shared.h"
#include "r_local.h"
#include "client.h"
#include "server.h"

/*
===============
R_DrawParticles
===============
*/

void
R_DrawParticles (void)
{
	particle_t *p, *kill;
	float       grav;
	int         i;
	float       time2, time3;
	float       time1;
	float       dvel;
	float       frametime;

	D_StartParticles ();

	VectorScale (vright, xscaleshrink, r_pright);
	VectorScale (vup, yscaleshrink, r_pup);
	VectorCopy (vpn, r_ppn);

	frametime = cl.time - cl.oldtime;
	time3 = frametime * 15;
	time2 = frametime * 10;				// 15;
	time1 = frametime * 5;
	grav = frametime * sv_gravity->value * 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;
		}

		D_DrawParticle (p);

		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_grav:
#ifdef QUAKE2
			p->vel[2] -= grav * 20;
			break;
#endif
			case pt_slowgrav:
			p->vel[2] -= grav;
			break;
		}
	}

	D_EndParticles ();
}

void
R_AddFire (vec3_t start, vec3_t end, entity_t *ent)
{
}