r_part.c

quake1 dos源代码最新版本

/*
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");
}

#ifdef QUAKE2
void R_DarkFieldParticles (entity_t *ent)
{
	int			i, j, k;
	particle_t	*p;
	float		vel;
	vec3_t		dir;
	vec3_t		org;

	org[0] = ent->origin[0];
	org[1] = ent->origin[1];
	org[2] = ent->origin[2];
	for (i=-16 ; i<16 ; i+=8)
		for (j=-16 ; j<16 ; j+=8)
			for (k=0 ; k<32 ; k+=8)
			{
				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 = 150 + rand()%6;
				p->type = pt_slowgrav;

				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);
			}
}
#endif


/*
===============
R_EntityParticles
===============
*/

#define NUMVERTEXNORMALS	162
extern	float	r_avertexnormals[NUMVERTEXNORMALS][3];
vec3_t	avelocities[NUMVERTEXNORMALS];
float	beamlength = 16;
vec3_t	avelocity = {23, 7, 3};
float	partstep = 0.01;
float	timescale = 0.01;

void R_EntityParticles (entity_t *ent)
{
//	int			count;	// 2001-12-10 Reduced compiler warnings by Jeff Ford
	int			i;
	particle_t	*p;
	float		angle;
	float		sp, sy, cp, cy;	//sr, cr, 	// 2001-12-10 Reduced compiler warnings by Jeff Ford
	vec3_t		forward;
	float		dist;

	dist = 64;
//	count = 50;	// 2001-12-10 Reduced compiler warnings by Jeff Ford

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

	for (i=0 ; i<NUMVERTEXNORMALS ; i++)
	{
		angle = cl.time * avelocities[i][0];
		sy = sin(angle);
		cy = cos(angle);
		angle = cl.time * avelocities[i][1];
		sp = sin(angle);
		cp = cos(angle);
		angle = cl.time * avelocities[i][2];
//		sr = sin(angle);	// 2001-12-10 Reduced compiler warnings by Jeff Ford
//		cr = cos(angle);	// 2001-12-10 Reduced compiler warnings by Jeff Ford

		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->die = cl.time + 0.01;
		p->color = 0x6f;
		p->type = pt_explode;

		p->org[0] = ent->origin[0] + r_avertexnormals[i][0]*dist + forward[0]*beamlength;
		p->org[1] = ent->origin[1] + r_avertexnormals[i][1]*dist + forward[1]*beamlength;
		p->org[2] = ent->origin[2] + r_avertexnormals[i][2]*dist + forward[2]*beamlength;
	}
}


/*
===============
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];

	sprintf (name,"maps/%s.pts", sv.name);

	COM_FOpenFile (name, &f, NULL);	// 2001-09-12 Returning from which searchpath a file was loaded by Maddes
	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_ParseParticleEffect

Parse an effect out of the server message
===============
*/
void R_ParseParticleEffect (void)
{
	vec3_t		org, dir;
	int			i, count, msgcount, color;

	for (i=0 ; i<3 ; i++)
		org[i] = MSG_ReadCoord ();
	for (i=0 ; i<3 ; i++)
		dir[i] = MSG_ReadChar () * (1.0/16);
	msgcount = MSG_ReadByte ();
	color = MSG_ReadByte ();

if (msgcount == 255)
	count = 1024;
else
	count = msgcount;

	R_RunParticleEffect (org, dir, color, count);
}

/*
===============
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_ParticleExplosion2

===============
*/
void R_ParticleExplosion2 (vec3_t org, int colorStart, int colorLength)
{
	int			i, j;
	particle_t	*p;
	int			colorMod = 0;

	for (i=0; i<512; i++)
	{
		if (!free_particles)
			return;
		p = free_particles;
		free_particles = p->next;
		p->next = active_particles;
		active_particles = p;

		p->die = cl.time + 0.3;
		p->color = colorStart + (colorMod % colorLength);
		colorMod++;

		p->type = pt_blob;
		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)
{