mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-26 06:10:56 +00:00
465 lines
11 KiB
C
465 lines
11 KiB
C
/*
|
|
gl_sky.c
|
|
|
|
sky polygons
|
|
|
|
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 "QF/cvar.h"
|
|
#include "QF/image.h"
|
|
#include "QF/quakefs.h"
|
|
#include "QF/render.h"
|
|
#include "QF/sys.h"
|
|
#include "QF/va.h"
|
|
#include "QF/vid.h"
|
|
#include "QF/GL/defines.h"
|
|
#include "QF/GL/funcs.h"
|
|
#include "QF/GL/qf_rlight.h"
|
|
#include "QF/GL/qf_sky.h"
|
|
#include "QF/GL/qf_textures.h"
|
|
#include "QF/GL/qf_vid.h"
|
|
|
|
#include "compat.h"
|
|
#include "r_internal.h"
|
|
|
|
// Note that the cube face names are from the perspective of looking at the
|
|
// cube from the outside on the -ve y axis with +x to the right, +y going in,
|
|
// +z up, and front is the nearest face.
|
|
static const char *suf[6] = { "rt", "bk", "lf", "ft", "up", "dn" };
|
|
GLuint gl_solidskytexture;
|
|
GLuint gl_alphaskytexture;
|
|
|
|
// Set to true if a valid skybox is loaded --KB
|
|
bool gl_skyloaded = false;
|
|
|
|
|
|
vec5_t gl_skyvec[6][4] = {
|
|
{
|
|
// right +x
|
|
{0, 0, 1024, 1024, 1024},
|
|
{0, 1, 1024, 1024, -1024},
|
|
{1, 1, 1024, -1024, -1024},
|
|
{1, 0, 1024, -1024, 1024}
|
|
},
|
|
{
|
|
// back +y
|
|
{0, 0, -1024, 1024, 1024},
|
|
{0, 1, -1024, 1024, -1024},
|
|
{1, 1, 1024, 1024, -1024},
|
|
{1, 0, 1024, 1024, 1024}
|
|
},
|
|
{
|
|
// left -x
|
|
{0, 0, -1024, -1024, 1024},
|
|
{0, 1, -1024, -1024, -1024},
|
|
{1, 1, -1024, 1024, -1024},
|
|
{1, 0, -1024, 1024, 1024}
|
|
},
|
|
{
|
|
// front -y
|
|
{0, 0, 1024, -1024, 1024},
|
|
{0, 1, 1024, -1024, -1024},
|
|
{1, 1, -1024, -1024, -1024},
|
|
{1, 0, -1024, -1024, 1024}
|
|
},
|
|
{
|
|
// up +z
|
|
{0, 0, -1024, 1024, 1024},
|
|
{0, 1, 1024, 1024, 1024},
|
|
{1, 1, 1024, -1024, 1024},
|
|
{1, 0, -1024, -1024, 1024}
|
|
},
|
|
{
|
|
// down -z
|
|
{0, 0, 1024, 1024, -1024},
|
|
{0, 1, -1024, 1024, -1024},
|
|
{1, 1, -1024, -1024, -1024},
|
|
{1, 0, 1024, -1024, -1024}
|
|
}
|
|
};
|
|
|
|
void
|
|
gl_R_LoadSkys (const char *skyname)
|
|
{
|
|
const char *name;
|
|
int i; // j
|
|
|
|
if (!skyname || !*skyname)
|
|
skyname = r_skyname;
|
|
|
|
if (!*skyname || strcasecmp (skyname, "none") == 0) {
|
|
gl_skyloaded = false;
|
|
return;
|
|
}
|
|
|
|
gl_skyloaded = true;
|
|
for (i = 0; i < 6; i++) {
|
|
tex_t *targa;
|
|
|
|
qfglBindTexture (GL_TEXTURE_2D, SKY_TEX + i);
|
|
|
|
targa = LoadImage (name = va (0, "env/%s%s", skyname, suf[i]), 1);
|
|
if (!targa || targa->format < 3) { // FIXME Can't do PCX right now
|
|
Sys_MaskPrintf (SYS_dev, "Couldn't load %s\n", name);
|
|
// also look in gfx/env, where Darkplaces looks for skies
|
|
targa = LoadImage (name = va (0, "gfx/env/%s%s", skyname,
|
|
suf[i]), 1);
|
|
if (!targa) {
|
|
Sys_MaskPrintf (SYS_dev, "Couldn't load %s\n", name);
|
|
gl_skyloaded = false;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// FIXME need better texture loading
|
|
qfglTexImage2D (GL_TEXTURE_2D, 0, gl_solid_format, targa->width,
|
|
targa->height, 0,
|
|
targa->format == 3 ? GL_RGB : GL_RGBA,
|
|
GL_UNSIGNED_BYTE, &targa->data);
|
|
|
|
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
if (gl_Anisotropy)
|
|
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
|
|
gl_aniso);
|
|
qfglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
|
|
qfglTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
|
|
|
|
#if 0
|
|
for (j = 0; j < 4; j++) {
|
|
// set the texture coords to be 1/2 pixel in from the edge
|
|
if (gl_skyvec[i][j][0] < 0.5)
|
|
gl_skyvec[i][j][0] = 0.5 / targa->width;
|
|
else
|
|
gl_skyvec[i][j][0] = 1 - 0.5 / targa->width;
|
|
|
|
if (gl_skyvec[i][j][1] < 0.5)
|
|
gl_skyvec[i][j][1] = 0.5 / targa->height;
|
|
else
|
|
gl_skyvec[i][j][1] = 1 - 0.5 / targa->height;
|
|
}
|
|
#endif
|
|
}
|
|
if (!gl_skyloaded)
|
|
Sys_Printf ("Unable to load skybox %s, using normal sky\n", skyname);
|
|
}
|
|
|
|
static void
|
|
R_DrawSkyBox (void)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
qfglBindTexture (GL_TEXTURE_2D, SKY_TEX + i);
|
|
qfglBegin (GL_QUADS);
|
|
for (j = 0; j < 4; j++) {
|
|
float *v = (float *) gl_skyvec[i][j];
|
|
|
|
qfglTexCoord2fv (v);
|
|
qfglVertex3f (r_refdef.frame.position[0] + v[2],
|
|
r_refdef.frame.position[1] + v[3],
|
|
r_refdef.frame.position[2] + v[4]);
|
|
}
|
|
qfglEnd ();
|
|
}
|
|
}
|
|
|
|
static vec3_t domescale = {2048.0, 2048.0, 512.0};
|
|
static vec3_t zenith = { 0.0, 0.0, 512.0};
|
|
static vec3_t nadir = { 0.0, 0.0, -512.0};
|
|
|
|
static inline void
|
|
skydome_vertex (const vec3_t v, float speedscale)
|
|
{
|
|
float length, s, t;
|
|
vec3_t dir, point;
|
|
|
|
VectorCopy (v, dir);
|
|
dir[2] *= 3.0;
|
|
|
|
length = DotProduct (dir, dir);
|
|
length = 2.953125 / sqrt (length);
|
|
|
|
dir[0] *= length;
|
|
dir[1] *= length;
|
|
|
|
s = speedscale + dir[0];
|
|
t = speedscale + dir[1];
|
|
|
|
VectorAdd (r_refdef.frame.position, v, point);
|
|
|
|
qfglTexCoord2f (s, t);
|
|
qfglVertex3fv (point);
|
|
}
|
|
|
|
static void
|
|
skydome_debug (void)
|
|
{
|
|
float x, y, a1x, a1y, a2x, a2y;
|
|
int a, b, h, t, i;
|
|
vec3_t v[3];
|
|
|
|
qfglDisable (GL_TEXTURE_2D);
|
|
qfglBegin (GL_LINES);
|
|
for (a = 0; a < 16; a++) {
|
|
a1x = gl_bubble_costable[a * 2] * domescale[0];
|
|
a1y = -gl_bubble_sintable[a * 2] * domescale[1];
|
|
a2x = gl_bubble_costable[(a + 1) * 2] * domescale[0];
|
|
a2y = -gl_bubble_sintable[(a + 1) * 2] * domescale[1];
|
|
|
|
h = 1;
|
|
t = 0;
|
|
VectorAdd (zenith, r_refdef.frame.position, v[0]);
|
|
for (b = 1; b <= 8; b++) {
|
|
x = gl_bubble_costable[b + 8];
|
|
y = -gl_bubble_sintable[b + 8];
|
|
|
|
v[h][0] = a1x * x;
|
|
v[h][1] = a1y * x;
|
|
v[h][2] = y * domescale[2];
|
|
VectorAdd (v[h], r_refdef.frame.position, v[h]);
|
|
for (i = t; i != h; i = (i + 1) % 3) {
|
|
qfglVertex3fv (v[i]);
|
|
qfglVertex3fv (v[h]);
|
|
}
|
|
h = (h + 1) % 3;
|
|
if (h == t)
|
|
t = (t + 1) % 3;
|
|
|
|
v[h][0] = a2x * x;
|
|
v[h][1] = a2y * x;
|
|
v[h][2] = y * domescale[2];
|
|
VectorAdd (v[h], r_refdef.frame.position, v[h]);
|
|
for (i = t; i != h; i = (i + 1) % 3) {
|
|
qfglVertex3fv (v[i]);
|
|
qfglVertex3fv (v[h]);
|
|
}
|
|
h = (h + 1) % 3;
|
|
if (h == t)
|
|
t = (t + 1) % 3;
|
|
}
|
|
|
|
h = 1;
|
|
t = 0;
|
|
VectorAdd (nadir, r_refdef.frame.position, v[0]);
|
|
for (b = 15; b >= 8; b--) {
|
|
x = gl_bubble_costable[b + 8];
|
|
y = -gl_bubble_sintable[b + 8];
|
|
|
|
v[h][0] = a2x * x;
|
|
v[h][1] = a2y * x;
|
|
v[h][2] = y * domescale[2];
|
|
VectorAdd (v[h], r_refdef.frame.position, v[h]);
|
|
for (i = t; i != h; i = (i + 1) % 3) {
|
|
qfglVertex3fv (v[i]);
|
|
qfglVertex3fv (v[h]);
|
|
}
|
|
h = (h + 1) % 3;
|
|
if (h == t)
|
|
t = (t + 1) % 3;
|
|
|
|
v[h][0] = a1x * x;
|
|
v[h][1] = a1y * x;
|
|
v[h][2] = y * domescale[2];
|
|
VectorAdd (v[h], r_refdef.frame.position, v[h]);
|
|
for (i = t; i != h; i = (i + 1) % 3) {
|
|
qfglVertex3fv (v[i]);
|
|
qfglVertex3fv (v[h]);
|
|
}
|
|
h = (h + 1) % 3;
|
|
if (h == t)
|
|
t = (t + 1) % 3;
|
|
}
|
|
}
|
|
qfglEnd ();
|
|
qfglEnable (GL_TEXTURE_2D);
|
|
}
|
|
|
|
static void
|
|
R_DrawSkyLayer (float speedscale)
|
|
{
|
|
float x, y, a1x, a1y, a2x, a2y;
|
|
int a, b;
|
|
vec3_t v;
|
|
|
|
for (a = 0; a < 16; a++) {
|
|
a1x = gl_bubble_costable[a * 2] * domescale[0];
|
|
a1y = -gl_bubble_sintable[a * 2] * domescale[1];
|
|
a2x = gl_bubble_costable[(a + 1) * 2] * domescale[0];
|
|
a2y = -gl_bubble_sintable[(a + 1) * 2] * domescale[1];
|
|
|
|
qfglBegin (GL_TRIANGLE_STRIP);
|
|
skydome_vertex (zenith, speedscale);
|
|
for (b = 1; b <= 8; b++) {
|
|
x = gl_bubble_costable[b + 8];
|
|
y = -gl_bubble_sintable[b + 8];
|
|
|
|
v[0] = a1x * x;
|
|
v[1] = a1y * x;
|
|
v[2] = y * domescale[2];
|
|
skydome_vertex (v, speedscale);
|
|
|
|
v[0] = a2x * x;
|
|
v[1] = a2y * x;
|
|
v[2] = y * domescale[2];
|
|
skydome_vertex (v, speedscale);
|
|
}
|
|
qfglEnd ();
|
|
|
|
qfglBegin (GL_TRIANGLE_STRIP);
|
|
skydome_vertex (nadir, speedscale);
|
|
for (b = 15; b >= 8; b--) {
|
|
x = gl_bubble_costable[b + 8];
|
|
y = -gl_bubble_sintable[b + 8];
|
|
|
|
v[0] = a2x * x;
|
|
v[1] = a2y * x;
|
|
v[2] = y * domescale[2];
|
|
skydome_vertex (v, speedscale);
|
|
|
|
v[0] = a1x * x;
|
|
v[1] = a1y * x;
|
|
v[2] = y * domescale[2];
|
|
skydome_vertex (v, speedscale);
|
|
}
|
|
qfglEnd ();
|
|
}
|
|
}
|
|
|
|
static void
|
|
R_DrawSkyDome (void)
|
|
{
|
|
float speedscale; // for top sky and bottom sky
|
|
|
|
// base sky
|
|
qfglDisable (GL_BLEND);
|
|
qfglBindTexture (GL_TEXTURE_2D, gl_solidskytexture);
|
|
speedscale = vr_data.realtime / 16.0;
|
|
speedscale -= floor (speedscale);
|
|
R_DrawSkyLayer (speedscale);
|
|
qfglEnable (GL_BLEND);
|
|
|
|
// clouds
|
|
if (gl_sky_multipass) {
|
|
qfglBindTexture (GL_TEXTURE_2D, gl_alphaskytexture);
|
|
speedscale = vr_data.realtime / 8.0;
|
|
speedscale -= floor (speedscale);
|
|
R_DrawSkyLayer (speedscale);
|
|
}
|
|
if (gl_sky_debug) {
|
|
skydome_debug ();
|
|
}
|
|
}
|
|
|
|
void
|
|
gl_R_DrawSky (void)
|
|
{
|
|
qfglDisable (GL_DEPTH_TEST);
|
|
qfglDepthMask (GL_FALSE);
|
|
if (gl_skyloaded)
|
|
R_DrawSkyBox ();
|
|
else
|
|
R_DrawSkyDome ();
|
|
qfglDepthMask (GL_TRUE);
|
|
qfglEnable (GL_DEPTH_TEST);
|
|
}
|
|
|
|
/*
|
|
R_InitSky
|
|
|
|
A sky texture is 256*128, with the right side being a masked overlay
|
|
*/
|
|
void
|
|
gl_R_InitSky (texture_t *mt)
|
|
{
|
|
byte *src;
|
|
int i, j, p, r, g, b;
|
|
unsigned int transpix;
|
|
unsigned int trans[128 * 128];
|
|
unsigned int *rgba;
|
|
|
|
src = (byte *) mt + mt->offsets[0];
|
|
|
|
// make an average value for the back to avoid a fringe on the top level
|
|
|
|
r = g = b = 0;
|
|
for (i = 0; i < 128; i++) {
|
|
for (j = 0; j < 128; j++) {
|
|
p = src[i * 256 + j + 128];
|
|
rgba = &d_8to24table[p];
|
|
trans[(i * 128) + j] = *rgba;
|
|
r += ((byte *) rgba)[0];
|
|
g += ((byte *) rgba)[1];
|
|
b += ((byte *) rgba)[2];
|
|
}
|
|
}
|
|
r /= 128 * 128;
|
|
g /= 128 * 128;
|
|
b /= 128 * 128;
|
|
|
|
//FIXME assumes little endian
|
|
transpix = ((b << 16) | (g << 8) | (r << 0)) & 0x00ffffff;
|
|
|
|
if (!gl_solidskytexture) {
|
|
qfglGenTextures (1, &gl_solidskytexture);
|
|
}
|
|
qfglBindTexture (GL_TEXTURE_2D, gl_solidskytexture);
|
|
qfglTexImage2D (GL_TEXTURE_2D, 0, gl_solid_format, 128, 128, 0, GL_RGBA,
|
|
GL_UNSIGNED_BYTE, trans);
|
|
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
if (gl_Anisotropy)
|
|
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
|
|
gl_aniso);
|
|
|
|
for (i = 0; i < 128; i++)
|
|
for (j = 0; j < 128; j++) {
|
|
p = src[i * 256 + j];
|
|
if (p == 0)
|
|
trans[(i * 128) + j] = transpix;
|
|
else
|
|
trans[(i * 128) + j] = d_8to24table[p];
|
|
}
|
|
|
|
if (!gl_alphaskytexture) {
|
|
qfglGenTextures (1, &gl_alphaskytexture);
|
|
}
|
|
qfglBindTexture (GL_TEXTURE_2D, gl_alphaskytexture);
|
|
qfglTexImage2D (GL_TEXTURE_2D, 0, gl_alpha_format, 128, 128, 0, GL_RGBA,
|
|
GL_UNSIGNED_BYTE, trans);
|
|
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
if (gl_Anisotropy)
|
|
qfglTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
|
|
gl_aniso);
|
|
}
|