mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-06 13:11:20 +00:00
336 lines
7.9 KiB
C
336 lines
7.9 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
|
|
|
|
$Id$
|
|
*/
|
|
|
|
#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/compat.h"
|
|
#include "QF/console.h"
|
|
#include "QF/quakefs.h"
|
|
#include "QF/render.h"
|
|
#include "QF/tga.h"
|
|
#include "QF/vid.h"
|
|
|
|
#include "glquake.h"
|
|
#include "r_shared.h"
|
|
#include "view.h"
|
|
|
|
extern model_t *loadmodel;
|
|
|
|
extern int skytexturenum;
|
|
extern qboolean lighthalf;
|
|
|
|
int solidskytexture;
|
|
int alphaskytexture;
|
|
float speedscale; // for top sky and bottom sky
|
|
|
|
// Set to true if a valid skybox is loaded --KB
|
|
qboolean skyloaded = false;
|
|
|
|
|
|
char *suf[6] = { "rt", "bk", "lf", "ft", "up", "dn" };
|
|
void
|
|
R_LoadSkys (const char *skyname)
|
|
{
|
|
int i;
|
|
QFile *f;
|
|
char name[64];
|
|
|
|
if (strcasecmp (skyname, "none") == 0) {
|
|
skyloaded = false;
|
|
return;
|
|
}
|
|
|
|
skyloaded = true;
|
|
for (i = 0; i < 6; i++) {
|
|
byte *targa_rgba;
|
|
|
|
glBindTexture (GL_TEXTURE_2D, SKY_TEX + i);
|
|
snprintf (name, sizeof (name), "env/%s%s.tga", skyname, suf[i]);
|
|
COM_FOpenFile (name, &f);
|
|
if (!f) {
|
|
Con_DPrintf ("Couldn't load %s\n", name);
|
|
skyloaded = false;
|
|
continue;
|
|
}
|
|
targa_rgba = LoadTGA (f);
|
|
|
|
glTexImage2D (GL_TEXTURE_2D, 0, gl_solid_format, 256, 256, 0, GL_RGBA,
|
|
GL_UNSIGNED_BYTE, targa_rgba);
|
|
|
|
free (targa_rgba);
|
|
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
}
|
|
if (!skyloaded)
|
|
Con_Printf ("Unable to load skybox %s, using normal sky\n", skyname);
|
|
}
|
|
|
|
|
|
void
|
|
R_SkyBoxPolyVec (vec5_t v)
|
|
{
|
|
// avoid interpolation seams
|
|
// s = s * (254.0/256.0) + (1.0/256.0);
|
|
// t = t * (254.0/256.0) + (1.0/256.0);
|
|
glTexCoord2fv (v);
|
|
glVertex3f (r_refdef.vieworg[0] + v[2],
|
|
r_refdef.vieworg[1] + v[3], r_refdef.vieworg[2] + v[4]);
|
|
}
|
|
|
|
|
|
#define ftc(x) (x * (254.0/256.0) + (1.0/256.0))
|
|
vec5_t skyvec[6][4] = {
|
|
{
|
|
// right +y
|
|
{ftc (1), ftc (0), 1024, 1024, 1024},
|
|
{ftc (1), ftc (1), 1024, 1024, -1024},
|
|
{ftc (0), ftc (1), -1024, 1024, -1024},
|
|
{ftc (0), ftc (0), -1024, 1024, 1024}
|
|
},
|
|
{
|
|
// back -x
|
|
{ftc (1), ftc (0), -1024, 1024, 1024},
|
|
{ftc (1), ftc (1), -1024, 1024, -1024},
|
|
{ftc (0), ftc (1), -1024, -1024, -1024},
|
|
{ftc (0), ftc (0), -1024, -1024, 1024}
|
|
},
|
|
{
|
|
// left -y
|
|
{ftc (1), ftc (0), -1024, -1024, 1024},
|
|
{ftc (1), ftc (1), -1024, -1024, -1024},
|
|
{ftc (0), ftc (1), 1024, -1024, -1024},
|
|
{ftc (0), ftc (0), 1024, -1024, 1024}
|
|
},
|
|
{
|
|
// front +x
|
|
{ftc (1), ftc (0), 1024, -1024, 1024},
|
|
{ftc (1), ftc (1), 1024, -1024, -1024},
|
|
{ftc (0), ftc (1), 1024, 1024, -1024},
|
|
{ftc (0), ftc (0), 1024, 1024, 1024}
|
|
},
|
|
{
|
|
// up +z
|
|
{ftc (1), ftc (0), 1024, -1024, 1024},
|
|
{ftc (1), ftc (1), 1024, 1024, 1024},
|
|
{ftc (0), ftc (1), -1024, 1024, 1024},
|
|
{ftc (0), ftc (0), -1024, -1024, 1024}
|
|
},
|
|
{
|
|
// down -z
|
|
{ftc (1), ftc (0), 1024, 1024, -1024},
|
|
{ftc (1), ftc (1), 1024, -1024, -1024},
|
|
{ftc (0), ftc (1), -1024, -1024, -1024},
|
|
{ftc (0), ftc (0), -1024, 1024, -1024}
|
|
}
|
|
};
|
|
#undef ftc
|
|
|
|
|
|
void
|
|
R_DrawSkyBox (void)
|
|
{
|
|
int i, j;
|
|
|
|
glDisable (GL_DEPTH_TEST);
|
|
glDepthRange (gldepthmax, gldepthmax);
|
|
for (i = 0; i < 6; i++) {
|
|
glBindTexture (GL_TEXTURE_2D, SKY_TEX + i);
|
|
glBegin (GL_QUADS);
|
|
for (j = 0; j < 4; j++)
|
|
R_SkyBoxPolyVec (skyvec[i][j]);
|
|
glEnd ();
|
|
}
|
|
|
|
glEnable (GL_DEPTH_TEST);
|
|
glDepthRange (gldepthmin, gldepthmax);
|
|
}
|
|
|
|
|
|
vec3_t domescale;
|
|
|
|
void
|
|
R_DrawSkyLayer (float s)
|
|
{
|
|
int a, b;
|
|
float x, y, a1x, a1y, a2x, a2y;
|
|
vec3_t v;
|
|
|
|
for (a = 0; a < 16; a++) {
|
|
a1x = bubble_costable[a * 2] * domescale[0];
|
|
a1y = -bubble_sintable[a * 2] * domescale[1];
|
|
a2x = bubble_costable[(a + 1) * 2] * domescale[0];
|
|
a2y = -bubble_sintable[(a + 1) * 2] * domescale[1];
|
|
|
|
glBegin (GL_TRIANGLE_STRIP);
|
|
glTexCoord2f (0.5 + s * (1.0 / 128.0), 0.5 + s * (1.0 / 128.0));
|
|
glVertex3f (r_refdef.vieworg[0],
|
|
r_refdef.vieworg[1], r_refdef.vieworg[2] + domescale[2]);
|
|
for (b = 1; b < 8; b++) {
|
|
x = bubble_costable[b * 2 + 16];
|
|
y = -bubble_sintable[b * 2 + 16];
|
|
|
|
v[0] = a1x * x;
|
|
v[1] = a1y * x;
|
|
v[2] = y * domescale[2];
|
|
glTexCoord2f ((v[0] + s) * (1.0 / 128.0),
|
|
(v[1] + s) * (1.0 / 128.0));
|
|
glVertex3f (v[0] + r_refdef.vieworg[0],
|
|
v[1] + r_refdef.vieworg[1], v[2] + r_refdef.vieworg[2]);
|
|
|
|
v[0] = a2x * x;
|
|
v[1] = a2y * x;
|
|
v[2] = y * domescale[2];
|
|
glTexCoord2f ((v[0] + s) * (1.0 / 128.0),
|
|
(v[1] + s) * (1.0 / 128.0));
|
|
glVertex3f (v[0] + r_refdef.vieworg[0],
|
|
v[1] + r_refdef.vieworg[1], v[2] + r_refdef.vieworg[2]);
|
|
}
|
|
glTexCoord2f (0.5 + s * (1.0 / 128.0), 0.5 + s * (1.0 / 128.0));
|
|
glVertex3f (r_refdef.vieworg[0],
|
|
r_refdef.vieworg[1], r_refdef.vieworg[2] - domescale[2]);
|
|
glEnd ();
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
R_DrawSkyDome (void)
|
|
{
|
|
glDisable (GL_DEPTH_TEST);
|
|
glDepthRange (gldepthmax, gldepthmax);
|
|
|
|
glDisable (GL_BLEND);
|
|
|
|
// base sky
|
|
glBindTexture (GL_TEXTURE_2D, solidskytexture);
|
|
domescale[0] = 512;
|
|
domescale[1] = 512;
|
|
domescale[2] = 128;
|
|
speedscale = r_realtime * 8;
|
|
speedscale -= (int) speedscale & ~127;
|
|
R_DrawSkyLayer (speedscale);
|
|
glEnable (GL_BLEND);
|
|
|
|
// clouds
|
|
if (gl_skymultipass->int_val) {
|
|
glBindTexture (GL_TEXTURE_2D, alphaskytexture);
|
|
domescale[0] = 512;
|
|
domescale[1] = 512;
|
|
domescale[2] = 128;
|
|
speedscale = r_realtime * 16;
|
|
speedscale -= (int) speedscale & ~127;
|
|
R_DrawSkyLayer (speedscale);
|
|
}
|
|
|
|
glEnable (GL_DEPTH_TEST);
|
|
glDepthRange (gldepthmin, gldepthmax);
|
|
}
|
|
|
|
|
|
void
|
|
R_DrawSky (void)
|
|
{
|
|
if (skyloaded)
|
|
R_DrawSkyBox ();
|
|
else
|
|
R_DrawSkyDome ();
|
|
}
|
|
|
|
|
|
/*
|
|
R_InitSky
|
|
|
|
A sky texture is 256*128, with the right side being a masked overlay
|
|
*/
|
|
void
|
|
R_InitSky (texture_t *mt)
|
|
{
|
|
int i, j, p;
|
|
byte *src;
|
|
unsigned int trans[128 * 128];
|
|
unsigned int transpix;
|
|
int r, g, b;
|
|
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];
|
|
}
|
|
|
|
((byte *) & transpix)[0] = r / (128 * 128);
|
|
((byte *) & transpix)[1] = g / (128 * 128);
|
|
((byte *) & transpix)[2] = b / (128 * 128);
|
|
((byte *) & transpix)[3] = 0;
|
|
|
|
|
|
if (!solidskytexture)
|
|
solidskytexture = texture_extension_number++;
|
|
glBindTexture (GL_TEXTURE_2D, solidskytexture);
|
|
glTexImage2D (GL_TEXTURE_2D, 0, gl_solid_format, 128, 128, 0, GL_RGBA,
|
|
GL_UNSIGNED_BYTE, trans);
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
|
|
|
|
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 (!alphaskytexture)
|
|
alphaskytexture = texture_extension_number++;
|
|
glBindTexture (GL_TEXTURE_2D, alphaskytexture);
|
|
glTexImage2D (GL_TEXTURE_2D, 0, gl_alpha_format, 128, 128, 0, GL_RGBA,
|
|
GL_UNSIGNED_BYTE, trans);
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
}
|