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id's sky code is back (gl_sky_clip 2 when no skybox is loaded). Not as fast

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as the black polygons (duh:) and not as nice looking as the sky dome, but also
not as slow (fps when standing in the normal coridor looking at the sky in
start: 26 for skydome, 37 for id skys, 44 for black). Good for when you want
to see sky other than black but your card can't handle the fillrate
requirements of skydome. I'll clean up the sqrt in there soonish.
This commit is contained in:
Bill Currie 2001-09-03 06:12:10 +00:00
parent ed4de07e9a
commit dc4cd343b5
4 changed files with 61 additions and 5 deletions
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3
include/r_shared.h
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@ -139,6 +139,9 @@ extern void SetUpForLineScan(fixed8_t startvertu, fixed8_t startvertv,
extern int r_skymade;
extern void R_MakeSky (void);
extern int solidskytexture;
extern int alphaskytexture;
extern int ubasestep, errorterm, erroradjustup, erroradjustdown;
extern double r_realtime;

4
libs/video/renderer/gl/gl_rsurf.c
View file

@ -335,10 +335,6 @@ R_TextureAnimation (texture_t *base)
/* BRUSH MODELS */
extern float speedscale; // for top sky and bottom sky
extern int solidskytexture;
extern int alphaskytexture;
void
GL_UploadLightmap (int i, int x, int y, int w, int h)
{

3
libs/video/renderer/gl/gl_sky.c
View file

@ -55,7 +55,6 @@
#include "r_cvar.h"
char *suf[6] = { "rt", "bk", "lf", "ft", "up", "dn" };
float speedscale; // for top sky and bottom sky
int solidskytexture;
int alphaskytexture;
@ -230,6 +229,8 @@ R_DrawSkyLayer (float s)
void
R_DrawSkyDome (void)
{
float speedscale; // for top sky and bottom sky
qfglDisable (GL_DEPTH_TEST);
qfglDepthRange (gldepthmax, gldepthmax);

56
libs/video/renderer/gl/gl_sky_clip.c
View file

@ -658,6 +658,38 @@ R_DrawSkyDomePoly (glpoly_t *poly)
qfglEnd ();
}
void
EmitSkyPolys (float speedscale, msurface_t *fa)
{
glpoly_t *p;
float *v;
int i;
float s, t;
vec3_t dir;
float length;
for (p = fa->polys; p; p = p->next) {
qfglBegin (GL_POLYGON);
for (i = 0, v = p->verts[0]; i < p->numverts; i++, v += VERTEXSIZE) {
VectorSubtract (v, r_origin, dir);
dir[2] *= 3; // flatten the sphere
length = DotProduct (dir, dir);
length = 6 * 63 / sqrt (length);
dir[0] *= length;
dir[1] *= length;
s = (speedscale + dir[0]) * (1.0/128);
t = (speedscale + dir[1]) * (1.0/128);
qfglTexCoord2f (s, t);
qfglVertex3fv (v);
}
qfglEnd ();
}
}
void
R_DrawSkyChain (msurface_t *sky_chain)
{
@ -694,6 +726,30 @@ R_DrawSkyChain (msurface_t *sky_chain)
sc = sc->texturechain;
}
qfglDepthRange (gldepthmin, gldepthmax);
} else if (gl_sky_clip->int_val == 2) {
float speedscale;
speedscale = r_realtime*8;
speedscale -= (int)speedscale & ~127 ;
qfglBindTexture (GL_TEXTURE_2D, solidskytexture);
while (sc) {
EmitSkyPolys (speedscale, sc);
sc = sc->texturechain;
}
if (gl_skymultipass->int_val) {
sc = sky_chain;
speedscale = r_realtime*16;
speedscale -= (int)speedscale & ~127 ;
qfglBindTexture (GL_TEXTURE_2D, alphaskytexture);
while (sc) {
EmitSkyPolys (speedscale, sc);
sc = sc->texturechain;
}
}
} else {
// this code is duplicated from above because skydome is not yet
// clipped