mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-23 12:52:46 +00:00
144 lines
3 KiB
C
144 lines
3 KiB
C
/*
|
|
r_dyn_textures.c
|
|
|
|
Dynamic texture generation.
|
|
|
|
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
|
|
|
|
#ifdef HAVE_STRING_H
|
|
# include <string.h>
|
|
#endif
|
|
#ifdef HAVE_STRINGS_H
|
|
# include <strings.h>
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "QF/image.h"
|
|
#include "QF/qtypes.h"
|
|
|
|
#include "noisetextures.h"
|
|
#include "r_internal.h"
|
|
|
|
tex_t *
|
|
R_DotParticleTexture (void)
|
|
{
|
|
byte (*data)[32][32][2];
|
|
int x, y, dx2, dy, d;
|
|
tex_t *tex;
|
|
|
|
tex = malloc (field_offset (tex_t, data[sizeof (*data)]));
|
|
tex->width = 32;
|
|
tex->height = 32;
|
|
tex->format = tex_la;
|
|
tex->palette = 0;
|
|
data = (byte (*)[32][32][2]) tex->data;
|
|
|
|
for (x = 0; x < 32; x++) {
|
|
dx2 = x - 16;
|
|
dx2 *= dx2;
|
|
for (y = 0; y < 32; y++) {
|
|
dy = y - 16;
|
|
d = 255 - (dx2 + (dy * dy));
|
|
if (d <= 0)
|
|
d = 0;
|
|
(*data)[y][x][0] = 255;
|
|
(*data)[y][x][1] = (byte) d;
|
|
}
|
|
}
|
|
return tex;
|
|
}
|
|
|
|
tex_t *
|
|
R_SparkParticleTexture (void)
|
|
{
|
|
byte (*data)[32][32][2];
|
|
int x, y, dx2, dy, d;
|
|
tex_t *tex;
|
|
|
|
tex = malloc (field_offset (tex_t, data[sizeof (*data)]));
|
|
tex->width = 32;
|
|
tex->height = 32;
|
|
tex->format = tex_la;
|
|
tex->palette = 0;
|
|
data = (byte (*)[32][32][2]) tex->data;
|
|
|
|
for (x = 0; x < 32; x++) {
|
|
dx2 = 16 - abs (x - 16);
|
|
dx2 *= dx2;
|
|
for (y = 0; y < 32; y++) {
|
|
dy = 16 - abs (y - 16);
|
|
d = (dx2 + dy * dy) - 200;
|
|
if (d > 255) {
|
|
d = 255;
|
|
} else if (d < 1) {
|
|
d = 0;
|
|
}
|
|
(*data)[y][x][0] = 255;
|
|
(*data)[y][x][1] = (byte) d;
|
|
}
|
|
}
|
|
return tex;
|
|
}
|
|
|
|
tex_t *
|
|
R_SmokeParticleTexture (void)
|
|
{
|
|
byte d;
|
|
byte (*data)[32][32][2], noise1[32][32], noise2[32][32];
|
|
float dx, dy2;
|
|
int x, y, c;
|
|
tex_t *tex;
|
|
|
|
tex = malloc (field_offset (tex_t, data[sizeof (*data)]));
|
|
tex->width = 32;
|
|
tex->height = 32;
|
|
tex->format = tex_la;
|
|
tex->palette = 0;
|
|
data = (byte (*)[32][32][2]) tex->data;
|
|
|
|
memset (noise1, 0, sizeof (noise1));
|
|
noise_plasma (&noise1[0][0], 32);
|
|
noise_diamondsquare (&noise2[0][0], 32, 4);
|
|
for (y = 0; y < 32; y++) {
|
|
dy2 = y - 16;
|
|
dy2 *= dy2;
|
|
for (x = 0; x < 32; x++) {
|
|
dx = x - 16;
|
|
c = 255 - (dx * dx + dy2);
|
|
if (c < 1)
|
|
c = 0;
|
|
d = (noise1[y][x] + noise2[y][x]) / 2;
|
|
(*data)[y][x][0] = 255;
|
|
if (d > 0) {
|
|
(*data)[y][x][1] = (d * c) / 255;
|
|
} else {
|
|
(*data)[y][x][1] = 0;
|
|
}
|
|
}
|
|
}
|
|
return tex;
|
|
}
|