mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-12-12 05:31:59 +00:00
d70d72e6e4
This takes care of the global variables to a point (there is still the global struct shared between the non-vulkan renderers), but it also takes care of glsl's points-only rendering.
271 lines
6.7 KiB
C
271 lines
6.7 KiB
C
/*
|
|
gl_dyn_part.c
|
|
|
|
OpenGL particle system.
|
|
|
|
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
|
|
|
|
*/
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#define NH_DEFINE
|
|
#include "namehack.h"
|
|
|
|
#ifdef HAVE_STRING_H
|
|
# include <string.h>
|
|
#endif
|
|
#ifdef HAVE_STRINGS_H
|
|
# include <strings.h>
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "QF/cmd.h"
|
|
#include "QF/cvar.h"
|
|
#include "QF/mersenne.h"
|
|
#include "QF/qargs.h"
|
|
#include "QF/quakefs.h"
|
|
#include "QF/render.h"
|
|
#include "QF/sys.h"
|
|
#include "QF/va.h"
|
|
|
|
#include "QF/scene/entity.h"
|
|
|
|
#include "QF/GL/defines.h"
|
|
#include "QF/GL/funcs.h"
|
|
#include "QF/GL/qf_explosions.h"
|
|
#include "QF/GL/qf_textures.h"
|
|
#include "QF/GL/qf_vid.h"
|
|
|
|
#include "compat.h"
|
|
#include "r_internal.h"
|
|
#include "varrays.h"
|
|
|
|
static int partUseVA;
|
|
static int pVAsize;
|
|
static int *pVAindices;
|
|
static varray_t2f_c4ub_v3f_t *particleVertexArray;
|
|
|
|
void
|
|
gl_R_InitParticles (void)
|
|
{
|
|
int i;
|
|
|
|
if (r_psystem.maxparticles && r_init) {
|
|
if (vaelements) {
|
|
partUseVA = 0;
|
|
pVAsize = r_psystem.maxparticles * 4;
|
|
Sys_MaskPrintf (SYS_dev,
|
|
"Particles: Vertex Array use disabled.\n");
|
|
} else {
|
|
if (vaelements > 3)
|
|
pVAsize = min ((unsigned int) (vaelements - (vaelements % 4)),
|
|
r_psystem.maxparticles * 4);
|
|
else if (vaelements >= 0)
|
|
pVAsize = r_psystem.maxparticles * 4;
|
|
Sys_MaskPrintf (SYS_dev,
|
|
"Particles: %i maximum vertex elements.\n",
|
|
pVAsize);
|
|
}
|
|
if (particleVertexArray)
|
|
free (particleVertexArray);
|
|
particleVertexArray = (varray_t2f_c4ub_v3f_t *)
|
|
calloc (pVAsize, sizeof (varray_t2f_c4ub_v3f_t));
|
|
|
|
if (partUseVA)
|
|
qfglInterleavedArrays (GL_T2F_C4UB_V3F, 0, particleVertexArray);
|
|
|
|
if (pVAindices)
|
|
free (pVAindices);
|
|
pVAindices = (int *) calloc (pVAsize, sizeof (int));
|
|
for (i = 0; i < pVAsize; i++)
|
|
pVAindices[i] = i;
|
|
} else {
|
|
if (particleVertexArray) {
|
|
free (particleVertexArray);
|
|
particleVertexArray = 0;
|
|
}
|
|
if (pVAindices) {
|
|
free (pVAindices);
|
|
pVAindices = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gl_R_DrawParticles (void)
|
|
{
|
|
unsigned char *at;
|
|
int vacount;
|
|
float minparticledist, scale;
|
|
vec3_t up_scale, right_scale, up_right_scale, down_right_scale;
|
|
varray_t2f_c4ub_v3f_t *VA;
|
|
|
|
if (!r_particles->int_val)
|
|
return;
|
|
|
|
R_RunParticles (vr_data.frametime);
|
|
|
|
qfglBindTexture (GL_TEXTURE_2D, gl_part_tex);
|
|
// LordHavoc: particles should not affect zbuffer
|
|
qfglDepthMask (GL_FALSE);
|
|
qfglInterleavedArrays (GL_T2F_C4UB_V3F, 0, particleVertexArray);
|
|
|
|
minparticledist = DotProduct (r_refdef.viewposition, vpn) +
|
|
r_particles_nearclip->value;
|
|
|
|
vacount = 0;
|
|
VA = particleVertexArray;
|
|
|
|
for (unsigned i = 0; i < r_psystem.numparticles; i++) {
|
|
particle_t *p = &r_psystem.particles[i];
|
|
// Don't render particles too close to us.
|
|
// Note, we must still do physics and such on them.
|
|
if (!(DotProduct (p->pos, vpn) < minparticledist)) {
|
|
at = (byte *) &d_8to24table[(byte) p->icolor];
|
|
VA[0].color[0] = at[0];
|
|
VA[0].color[1] = at[1];
|
|
VA[0].color[2] = at[2];
|
|
VA[0].color[3] = p->alpha * 255;
|
|
memcpy (VA[1].color, VA[0].color, sizeof (VA[0].color));
|
|
memcpy (VA[2].color, VA[0].color, sizeof (VA[0].color));
|
|
memcpy (VA[3].color, VA[0].color, sizeof (VA[0].color));
|
|
|
|
switch (p->tex) {
|
|
case part_tex_dot:
|
|
VA[0].texcoord[0] = 0.0;
|
|
VA[0].texcoord[1] = 0.0;
|
|
VA[1].texcoord[0] = 0.5;
|
|
VA[1].texcoord[1] = 0.0;
|
|
VA[2].texcoord[0] = 0.5;
|
|
VA[2].texcoord[1] = 0.5;
|
|
VA[3].texcoord[0] = 0.0;
|
|
VA[3].texcoord[1] = 0.5;
|
|
break;
|
|
case part_tex_spark:
|
|
VA[0].texcoord[0] = 0.5;
|
|
VA[0].texcoord[1] = 0.0;
|
|
VA[1].texcoord[0] = 1.0;
|
|
VA[1].texcoord[1] = 0.0;
|
|
VA[2].texcoord[0] = 1.0;
|
|
VA[2].texcoord[1] = 0.5;
|
|
VA[3].texcoord[0] = 0.5;
|
|
VA[3].texcoord[1] = 0.5;
|
|
break;
|
|
case part_tex_smoke:
|
|
VA[0].texcoord[0] = 0.0;
|
|
VA[0].texcoord[1] = 0.5;
|
|
VA[1].texcoord[0] = 0.5;
|
|
VA[1].texcoord[1] = 0.5;
|
|
VA[2].texcoord[0] = 0.5;
|
|
VA[2].texcoord[1] = 1.0;
|
|
VA[3].texcoord[0] = 0.0;
|
|
VA[3].texcoord[1] = 1.0;
|
|
break;
|
|
}
|
|
|
|
scale = p->scale;
|
|
|
|
VectorScale (vup, scale, up_scale);
|
|
VectorScale (vright, scale, right_scale);
|
|
|
|
VectorAdd (right_scale, up_scale, up_right_scale);
|
|
VectorSubtract (right_scale, up_scale, down_right_scale);
|
|
|
|
VectorAdd (p->pos, down_right_scale, VA[0].vertex);
|
|
VectorSubtract (p->pos, up_right_scale, VA[1].vertex);
|
|
VectorSubtract (p->pos, down_right_scale, VA[2].vertex);
|
|
VectorAdd (p->pos, up_right_scale, VA[3].vertex);
|
|
|
|
VA += 4;
|
|
vacount += 4;
|
|
if (vacount + 4 > pVAsize) {
|
|
// never reached if partUseVA is false
|
|
qfglDrawElements (GL_QUADS, vacount, GL_UNSIGNED_INT,
|
|
pVAindices);
|
|
vacount = 0;
|
|
VA = particleVertexArray;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (vacount) {
|
|
if (partUseVA) {
|
|
qfglDrawElements (GL_QUADS, vacount, GL_UNSIGNED_INT, pVAindices);
|
|
} else {
|
|
varray_t2f_c4ub_v3f_t *va = particleVertexArray;
|
|
int i;
|
|
|
|
qfglBegin (GL_QUADS);
|
|
for (i = 0; i < vacount; i++, va++) {
|
|
qfglTexCoord2fv (va->texcoord);
|
|
qfglColor4ubv (va->color);
|
|
qfglVertex3fv (va->vertex);
|
|
}
|
|
qfglEnd ();
|
|
}
|
|
}
|
|
|
|
qfglColor3ubv (color_white);
|
|
qfglDepthMask (GL_TRUE);
|
|
}
|
|
|
|
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
|
|
gl_R_Particles_Init_Cvars (void)
|
|
{
|
|
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.");
|
|
}
|
|
|
|
psystem_t * __attribute__((const))//FIXME
|
|
gl_ParticleSystem (void)
|
|
{
|
|
return &r_psystem;
|
|
}
|