mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-15 01:11:27 +00:00
ce4bb1d56c
This has the advantage of getting entity_t out of the particle system, and much easier to read math. Also, it served as a nice test for my particle physics shaders (implemented the ideas in C). There's a lot of code that needs merging down: all but the actual drawing can be merged. There's some weirdness with color ramps, but I'll look into that later.
685 lines
15 KiB
C
685 lines
15 KiB
C
/*
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sw_rpart.c
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Software renderer particle effects code.
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include "QF/cvar.h"
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#include "QF/mersenne.h"
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#include "QF/qargs.h"
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#include "QF/quakefs.h"
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#include "QF/render.h"
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#include "QF/sys.h"
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#include "QF/va.h"
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#include "QF/scene/entity.h"
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#include "compat.h"
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#include "r_internal.h"
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static mtstate_t mt; // private PRNG state
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static vec4f_t
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roffs (int mod)
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{
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vec4f_t offs = {
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(mtwist_rand (&mt) % mod) - 0.5 * (mod - 1),
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(mtwist_rand (&mt) % mod) - 0.5 * (mod - 1),
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(mtwist_rand (&mt) % mod) - 0.5 * (mod - 1),
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0
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};
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return offs;
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}
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static vec4f_t
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tracer_vel (int tracercount, vec4f_t vec)
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{
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if (tracercount & 1) {
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return (vec4f_t) { vec[1], -vec[0], 0, 0 };
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} else {
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return (vec4f_t) { -vec[1], vec[0], 0, 0 };
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}
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}
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static void
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add_particle (ptype_t type, vec4f_t pos, vec4f_t vel, float live, int color,
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float ramp)
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{
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if (numparticles >= r_maxparticles)
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return;
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particle_t *p = &particles[numparticles];
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partparm_t *parm = &partparams[numparticles];
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const int **rampptr = &partramps[numparticles];
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numparticles += 1;
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p->pos = pos;
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p->vel = vel;
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p->icolor = color;
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p->alpha = 1;
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p->tex = 0;
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p->ramp = ramp;
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p->scale = 1;
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p->live = live;
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*parm = R_ParticlePhysics (type);
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*rampptr = R_ParticleRamp (type);
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if (*rampptr) {
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p->icolor = (*rampptr) [(int) p->ramp];
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}
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}
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void
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R_InitParticles (void)
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{
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mtwist_seed (&mt, 0xdeadbeef);
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}
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void
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R_ClearParticles (void)
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{
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if (r_maxparticles) {
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memset (particles, 0, r_maxparticles * sizeof (*particles));
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}
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}
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void
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R_ReadPointFile_f (void)
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{
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QFile *f;
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int c, r;
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const char *name;
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char *mapname;
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vec4f_t zero = {};
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mapname = strdup (r_worldentity.renderer.model->path);
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if (!mapname)
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Sys_Error ("Can't duplicate mapname!");
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QFS_StripExtension (mapname, mapname);
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name = va (0, "maps/%s.pts", mapname);
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free (mapname);
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f = QFS_FOpenFile (name);
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if (!f) {
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Sys_Printf ("couldn't open %s\n", name);
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return;
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}
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Sys_Printf ("Reading %s...\n", name);
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c = 0;
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for (;;) {
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char buf[64];
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vec4f_t org = { 0, 0, 0, 1 };
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Qgets (f, buf, sizeof (buf));
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r = sscanf (buf, "%f %f %f\n", &org[0], &org[1], &org[2]);
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if (r != 3)
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break;
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c++;
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//if (!free_particles) {
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// Sys_Printf ("Not enough free particles\n");
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// break;
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//}
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add_particle (pt_static, org, zero, INFINITY, (-c) & 15, 0);
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}
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Qclose (f);
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Sys_Printf ("%i points read\n", c);
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}
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static void
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R_ParticleExplosion_QF (vec4f_t org)
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{
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if (!r_particles->int_val)
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return;
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for (int i = 0; i < 1024; i++) {
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ptype_t type = i & 1 ? pt_explode2 : pt_explode;
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add_particle (type, org + roffs (32), roffs (512), 5,
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0, mtwist_rand (&mt) & 3);
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}
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}
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static void
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R_ParticleExplosion2_QF (vec4f_t org, int colorStart, int colorLength)
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{
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int colorMod = 0;
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for (int i=0; i<512; i++) {
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add_particle (pt_blob, org + roffs (32), roffs (512), 0.3,
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colorStart + (colorMod % colorLength), 0);
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}
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}
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static void
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R_BlobExplosion_QF (vec4f_t org)
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{
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if (!r_particles->int_val)
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return;
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for (int i = 0; i < 1024; i++) {
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ptype_t type = i & 1 ? pt_blob : pt_blob2;
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int color = i & 1 ? 66 : 150;
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add_particle (type, org + roffs (32), roffs (512),
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color + mtwist_rand (&mt) % 6,
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(color & ~7) + (mtwist_rand (&mt) & 7), 0);
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}
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}
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static void
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R_RunParticleEffect_QF (vec4f_t org, vec4f_t dir, int color, int count)
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{
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if (!r_particles->int_val)
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return;
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for (int i = 0; i < count; i++) {
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add_particle (pt_slowgrav, org + roffs (16),
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dir/* + roffs (300)*/,
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0.1 * (mtwist_rand (&mt) % 5),
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(color & ~7) + (mtwist_rand (&mt) & 7), 0);
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}
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}
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static void
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R_SpikeEffect_QF (vec4f_t org)
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{
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vec4f_t zero = {};
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R_RunParticleEffect_QF (org, zero, 0, 10);
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}
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static void
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R_SuperSpikeEffect_QF (vec4f_t org)
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{
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vec4f_t zero = {};
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R_RunParticleEffect_QF (org, zero, 0, 20);
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}
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static void
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R_KnightSpikeEffect_QF (vec4f_t org)
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{
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vec4f_t zero = {};
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R_RunParticleEffect_QF (org, zero, 226, 20);
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}
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static void
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R_WizSpikeEffect_QF (vec4f_t org)
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{
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vec4f_t zero = {};
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R_RunParticleEffect_QF (org, zero, 20, 30);
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}
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static void
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R_BloodPuffEffect_QF (vec4f_t org, int count)
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{
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vec4f_t zero = {};
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R_RunParticleEffect_QF (org, zero, 73, count);
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}
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static void
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R_GunshotEffect_QF (vec4f_t org, int count)
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{
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vec4f_t zero = {};
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R_RunParticleEffect_QF (org, zero, 0, count);
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}
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static void
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R_LightningBloodEffect_QF (vec4f_t org)
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{
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vec4f_t zero = {};
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R_RunParticleEffect_QF (org, zero, 225, 50);
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}
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static void
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R_LavaSplash_QF (vec4f_t org)
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{
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if (!r_particles->int_val)
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return;
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for (int i = -16; i < 16; i++) {
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for (int j = -16; j < 16; j++) {
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for (int k = 0; k < 1; k++) {
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float vel = 50 + (mtwist_rand (&mt) & 63);
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vec4f_t dir = {
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j * 8 + (mtwist_rand (&mt) & 7),
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i * 8 + (mtwist_rand (&mt) & 7),
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256,
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0
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};
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vec4f_t offs = {
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dir[0],
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dir[1],
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(mtwist_rand (&mt) & 63),
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0
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};
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dir = normalf (dir);
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add_particle (pt_grav, org + offs, vel * dir,
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2 + (mtwist_rand (&mt) & 31) * 0.02,
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224 + (mtwist_rand (&mt) & 7), 0);
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}
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}
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}
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}
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static void
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R_TeleportSplash_QF (vec4f_t org)
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{
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if (!r_particles->int_val)
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return;
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for (int i = -16; i < 16; i += 4) {
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for (int j = -16; j < 16; j += 4) {
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for (int k = -24; k < 32; k += 4) {
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float vel = 50 + (mtwist_rand (&mt) & 63);
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vec4f_t dir = normalf ((vec4f_t) { j, i, k, 0 } * 8);
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vec4f_t offs = {
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i + (mtwist_rand (&mt) & 3),
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j + (mtwist_rand (&mt) & 3),
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k + (mtwist_rand (&mt) & 3),
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0
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};
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add_particle (pt_grav, org + offs, vel * dir,
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0.2 + (mtwist_rand (&mt) & 7) * 0.02,
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7 + (mtwist_rand (&mt) & 7), 0);
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}
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}
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}
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}
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static void
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R_DarkFieldParticles_ID (vec4f_t org)
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{
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if (!r_particles->int_val)
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return;
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for (int i = -16; i < 16; i += 8) {
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for (int j = -16; j < 16; j += 8) {
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for (int k = 0; k < 32; k += 8) {
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uint32_t rnd = mtwist_rand (&mt);
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float vel = 50 + ((rnd >> 9) & 63);
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vec4f_t dir = normalf ((vec4f_t) { j, i, k, 0 } * 8);
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vec4f_t offs = {
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i + ((rnd >> 3) & 3),
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j + ((rnd >> 5) & 3),
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k + ((rnd >> 7) & 3),
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0
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};
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add_particle (pt_slowgrav, org + offs, vel * dir,
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0.2 + (rnd & 7) * 0.02,
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150 + mtwist_rand (&mt) % 6, 0);
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}
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}
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}
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}
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static vec4f_t velocities[NUMVERTEXNORMALS];
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static vec4f_t normals[NUMVERTEXNORMALS] = {
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#include "anorms.h"
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};
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static void
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R_EntityParticles_ID (vec4f_t org)
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{
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int i;
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float angle, sp, sy, cp, cy; // cr, sr
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float beamlength = 16.0, dist = 64.0;
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if (!r_particles->int_val)
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return;
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for (i = 0; i < NUMVERTEXNORMALS; i++) {
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int k;
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for (k = 0; k < 3; k++) {
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velocities[i][k] = (mtwist_rand (&mt) & 255) * 0.01;
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}
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}
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vec4f_t zero = {};
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for (i = 0; i < NUMVERTEXNORMALS; i++) {
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angle = vr_data.realtime * velocities[i][0];
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cy = cos (angle);
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sy = sin (angle);
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angle = vr_data.realtime * velocities[i][1];
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cp = cos (angle);
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sp = sin (angle);
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// Next 3 lines results aren't currently used, may be in future. --Despair
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// angle = vr_data.realtime * avelocities[i][2];
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// sr = sin (angle);
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// cr = cos (angle);
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vec4f_t forward = { cp * cy, cp * sy, -sp, 0 };
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vec4f_t pos = org + normals[i] * dist + forward * beamlength;
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//FIXME 0 velocity?
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add_particle (pt_explode, pos, zero, 0.01, 0x6f, 0);
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}
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}
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static void
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R_RocketTrail_QF (vec4f_t start, vec4f_t end)
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{
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if (!r_particles->int_val)
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return;
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vec4f_t vec = end - start;
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float len = magnitudef (vec)[0];
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vec = normalf (vec);
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vec4f_t zero = {};
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vec4f_t pos = start;
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while (len > 0) {
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len -= 3;
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add_particle (pt_fire, pos + roffs (6), zero, 2,
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0, (mtwist_rand (&mt) & 3));
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pos += vec;
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}
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}
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static void
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R_GrenadeTrail_QF (vec4f_t start, vec4f_t end)
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{
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if (!r_particles->int_val)
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return;
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vec4f_t vec = end - start;
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float len = magnitudef (vec)[0];
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vec = normalf (vec);
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vec4f_t zero = {};
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vec4f_t pos = start;
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while (len > 0) {
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len -= 3;
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add_particle (pt_fire, pos + roffs (6), zero, 2,
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0, (mtwist_rand (&mt) & 3) + 2);
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pos += vec;
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}
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}
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static void
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R_BloodTrail_QF (vec4f_t start, vec4f_t end)
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{
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if (!r_particles->int_val)
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return;
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vec4f_t vec = end - start;
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float len = magnitudef (vec)[0];
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vec = normalf (vec);
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vec4f_t zero = {};
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vec4f_t pos = start;
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while (len > 0) {
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len -= 3;
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add_particle (pt_slowgrav, pos + roffs (6), zero, 2,
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67 + (mtwist_rand (&mt) & 3), 0);
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pos += vec;
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}
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}
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static void
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R_SlightBloodTrail_QF (vec4f_t start, vec4f_t end)
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{
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if (!r_particles->int_val)
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return;
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vec4f_t vec = end - start;
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float len = magnitudef (vec)[0];
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vec = normalf (vec);
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vec4f_t zero = {};
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vec4f_t pos = start;
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while (len > 0) {
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len -= 6;
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add_particle (pt_slowgrav, pos + roffs (6), zero, 2,
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67 + (mtwist_rand (&mt) & 3), 0);
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pos += vec;
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}
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}
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static void
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R_WizTrail_QF (vec4f_t start, vec4f_t end)
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{
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if (!r_particles->int_val)
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return;
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vec4f_t vec = end - start;
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float len = magnitudef (vec)[0];
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vec = normalf (vec);
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vec4f_t pos = start;
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while (len > 0) {
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static int tracercount;
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len -= 3;
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add_particle (pt_static, pos, 30 * tracer_vel (tracercount, vec), 0.5,
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52 + ((tracercount & 4) << 1), 0);
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tracercount++;
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pos += vec;
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}
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}
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static void
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R_FlameTrail_QF (vec4f_t start, vec4f_t end)
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{
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if (!r_particles->int_val)
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return;
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vec4f_t vec = end - start;
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float len = magnitudef (vec)[0];
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vec = normalf (vec);
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vec4f_t pos = start;
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while (len > 0) {
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static int tracercount;
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len -= 3;
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add_particle (pt_static, pos, 30 * tracer_vel (tracercount, vec), 0.5,
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230 + ((tracercount & 4) << 1), 0);
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tracercount++;
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pos += vec;
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}
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}
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static void
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R_VoorTrail_QF (vec4f_t start, vec4f_t end)
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{
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if (!r_particles->int_val)
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return;
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vec4f_t vec = end - start;
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float len = magnitudef (vec)[0];
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vec = normalf (vec);
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vec4f_t zero = {};
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vec4f_t pos = start;
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while (len > 0) {
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len -= 3;
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add_particle (pt_static, pos + roffs (16), zero, 0.3,
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9 * 16 + 8 + (mtwist_rand (&mt) & 3), 0);
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pos += vec;
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}
|
|
}
|
|
|
|
void
|
|
R_DrawParticles (void)
|
|
{
|
|
VectorScale (vright, xscaleshrink, r_pright);
|
|
VectorScale (vup, yscaleshrink, r_pup);
|
|
VectorCopy (vpn, r_ppn);
|
|
|
|
vec4f_t gravity = {0, 0, -vr_data.gravity, 0};
|
|
|
|
unsigned j = 0;
|
|
for (unsigned i = 0; i < numparticles; i++) {
|
|
particle_t *p = &particles[i];
|
|
partparm_t *parm = &partparams[i];
|
|
|
|
if (p->live <= 0 || p->ramp >= parm->ramp_max) {
|
|
continue;
|
|
}
|
|
const int *ramp = partramps[j];
|
|
if (i > j) {
|
|
particles[j] = *p;
|
|
partparams[j] = *parm;
|
|
partramps[j] = ramp;
|
|
}
|
|
p = &particles[j];
|
|
parm = &partparams[j];
|
|
j += 1;
|
|
|
|
D_DrawParticle (p);
|
|
|
|
float dT = vr_data.frametime;
|
|
p->pos += dT * p->vel;
|
|
p->vel += dT * (p->vel * parm->drag + gravity * parm->drag[3]);
|
|
p->ramp += dT * parm->ramp;
|
|
p->live -= dT;
|
|
if (ramp) {
|
|
p->icolor = ramp[(int)p->ramp];
|
|
}
|
|
}
|
|
numparticles = j;
|
|
}
|
|
|
|
void
|
|
r_easter_eggs_f (cvar_t *var)
|
|
{
|
|
}
|
|
|
|
void
|
|
r_particles_style_f (cvar_t *var)
|
|
{
|
|
}
|
|
|
|
static void
|
|
R_Particle_New (ptype_t type, int texnum, vec4f_t pos, float scale,
|
|
vec4f_t vel, float live, int color, float alpha, float ramp)
|
|
{
|
|
add_particle (type, pos, vel, live, color, ramp);
|
|
}
|
|
|
|
static void
|
|
R_Particle_NewRandom (ptype_t type, int texnum, vec4f_t org, int org_fuzz,
|
|
float scale, int vel_fuzz, float live, int color,
|
|
float alpha, float ramp)
|
|
{
|
|
float o_fuzz = org_fuzz, v_fuzz = vel_fuzz;
|
|
int rnd;
|
|
vec4f_t pos, vel;
|
|
|
|
rnd = mtwist_rand (&mt);
|
|
pos[0] = o_fuzz * ((rnd & 63) - 31.5) / 63.0 + org[0];
|
|
pos[1] = o_fuzz * (((rnd >> 6) & 63) - 31.5) / 63.0 + org[1];
|
|
pos[2] = o_fuzz * (((rnd >> 10) & 63) - 31.5) / 63.0 + org[2];
|
|
pos[3] = 1;
|
|
rnd = mtwist_rand (&mt);
|
|
vel[0] = v_fuzz * ((rnd & 63) - 31.5) / 63.0;
|
|
vel[1] = v_fuzz * (((rnd >> 6) & 63) - 31.5) / 63.0;
|
|
vel[2] = v_fuzz * (((rnd >> 10) & 63) - 31.5) / 63.0;
|
|
vel[3] = 0;
|
|
|
|
add_particle (type, pos, vel, live, color, ramp);
|
|
}
|
|
|
|
static vid_particle_funcs_t particles_QF = {
|
|
R_RocketTrail_QF,
|
|
R_GrenadeTrail_QF,
|
|
R_BloodTrail_QF,
|
|
R_SlightBloodTrail_QF,
|
|
R_WizTrail_QF,
|
|
R_FlameTrail_QF,
|
|
R_VoorTrail_QF,
|
|
0,//R_GlowTrail_QF,
|
|
R_RunParticleEffect_QF,
|
|
R_BloodPuffEffect_QF,
|
|
R_GunshotEffect_QF,
|
|
R_LightningBloodEffect_QF,
|
|
R_SpikeEffect_QF,
|
|
R_KnightSpikeEffect_QF,
|
|
R_SuperSpikeEffect_QF,
|
|
R_WizSpikeEffect_QF,
|
|
R_BlobExplosion_QF,
|
|
R_ParticleExplosion_QF,
|
|
R_ParticleExplosion2_QF,
|
|
R_LavaSplash_QF,
|
|
R_TeleportSplash_QF,
|
|
R_DarkFieldParticles_ID,
|
|
R_EntityParticles_ID,
|
|
R_Particle_New,
|
|
R_Particle_NewRandom,
|
|
};
|
|
|
|
static void
|
|
R_ParticleFunctionInit (void)
|
|
{
|
|
sw_vid_render_funcs.particles = &particles_QF;
|
|
}
|
|
|
|
static void
|
|
r_particles_nearclip_f (cvar_t *var)
|
|
{
|
|
Cvar_SetValue (r_particles_nearclip, bound (r_nearclip->value, var->value,
|
|
r_farclip->value));
|
|
}
|
|
|
|
static void
|
|
r_particles_f (cvar_t *var)
|
|
{
|
|
R_MaxParticlesCheck (var, r_particles_max);
|
|
}
|
|
|
|
static void
|
|
r_particles_max_f (cvar_t *var)
|
|
{
|
|
R_MaxParticlesCheck (r_particles, var);
|
|
}
|
|
|
|
void
|
|
R_Particles_Init_Cvars (void)
|
|
{
|
|
easter_eggs = Cvar_Get ("easter_eggs", "0", CVAR_NONE, r_easter_eggs_f,
|
|
"Enables easter eggs.");
|
|
r_particles = Cvar_Get ("r_particles", "1", CVAR_ARCHIVE, r_particles_f,
|
|
"Toggles drawing of particles.");
|
|
r_particles_max = Cvar_Get ("r_particles_max", "2048", CVAR_ARCHIVE,
|
|
r_particles_max_f, "Maximum amount of "
|
|
"particles to display. No maximum, minimum "
|
|
"is 0.");
|
|
r_particles_nearclip = Cvar_Get ("r_particles_nearclip", "32",
|
|
CVAR_ARCHIVE, r_particles_nearclip_f,
|
|
"Distance of the particle near clipping "
|
|
"plane from the player.");
|
|
r_particles_style = Cvar_Get ("r_particles_style", "1", CVAR_ARCHIVE,
|
|
r_particles_style_f, "Sets particle style. "
|
|
"0 for Id, 1 for QF.");
|
|
R_ParticleFunctionInit ();
|
|
}
|