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beat the skydome bugs to a pulp. no more seam (and probably a bunch faster

Browse source 
on slow cards)
This commit is contained in:
Bill Currie 2003-04-05 07:59:29 +00:00
parent 3c58b712d9
commit e483333bbe
1 changed files with 142 additions and 23 deletions
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165
libs/video/renderer/gl/gl_sky.c
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@ -188,10 +188,119 @@ R_DrawSkyBox (void)
}
}
vec3_t domescale = {512.0, 512.0, 128.0};
vec3_t domescale = {2048.0, 2048.0, 512.0};
vec3_t zenith = { 0.0, 0.0, 512.0};
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.vieworg, v, point);
qfglTexCoord2f (s, t);
qfglVertex3fv (point);
}
static void
R_DrawSkyLayer (float s)
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 = 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];
h = 1;
t = 0;
VectorAdd (zenith, r_refdef.vieworg, v[0]);
for (b = 1; b <= 8; b++) {
x = bubble_costable[b + 8];
y = -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.vieworg, 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.vieworg, 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.vieworg, v[0]);
for (b = 15; b >= 8; b--) {
x = bubble_costable[b + 8];
y = -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.vieworg, 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.vieworg, 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;
@ -204,32 +313,39 @@ R_DrawSkyLayer (float s)
a2y = -bubble_sintable[(a + 1) * 2] * domescale[1];
qfglBegin (GL_TRIANGLE_STRIP);
qfglTexCoord2f (0.5 + s * (1.0 / 128.0), 0.5 + s * (1.0 / 128.0));
qfglVertex3f (r_refdef.vieworg[0], r_refdef.vieworg[1],
r_refdef.vieworg[2] + domescale[2]);
for (b = 1; b < 8; b++) {
x = bubble_costable[(b << 1) + 16];
y = -bubble_sintable[(b << 1) + 16];
skydome_vertex (zenith, speedscale);
for (b = 1; b <= 8; b++) {
x = bubble_costable[b + 8];
y = -bubble_sintable[b + 8];
v[0] = a1x * x;
v[1] = a1y * x;
v[2] = y * domescale[2];
qfglTexCoord2f ((v[0] + s) * (1.0 / 128.0),
(v[1] + s) * (1.0 / 128.0));
qfglVertex3f (v[0] + r_refdef.vieworg[0], v[1] +
r_refdef.vieworg[1], v[2] + r_refdef.vieworg[2]);
skydome_vertex (v, speedscale);
v[0] = a2x * x;
v[1] = a2y * x;
v[2] = y * domescale[2];
qfglTexCoord2f ((v[0] + s) * (1.0 / 128.0),
(v[1] + s) * (1.0 / 128.0));
qfglVertex3f (v[0] + r_refdef.vieworg[0], v[1] +
r_refdef.vieworg[1], v[2] + r_refdef.vieworg[2]);
skydome_vertex (v, speedscale);
}
qfglEnd ();
qfglBegin (GL_TRIANGLE_STRIP);
skydome_vertex (nadir, speedscale);
for (b = 15; b >= 8; b--) {
x = bubble_costable[b + 8];
y = -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);
}
qfglTexCoord2f (0.5 + s * (1.0 / 128.0), 0.5 + s * (1.0 / 128.0));
qfglVertex3f (r_refdef.vieworg[0], r_refdef.vieworg[1],
r_refdef.vieworg[2] - domescale[2]);
qfglEnd ();
}
}
@ -242,18 +358,21 @@ R_DrawSkyDome (void)
// base sky
qfglDisable (GL_BLEND);
qfglBindTexture (GL_TEXTURE_2D, solidskytexture);
speedscale = r_realtime * 8;
speedscale -= (int) speedscale & ~127;
speedscale = r_realtime / 16;
speedscale -= floor (speedscale);;
R_DrawSkyLayer (speedscale);
qfglEnable (GL_BLEND);
// clouds
if (gl_sky_multipass->int_val) {
qfglBindTexture (GL_TEXTURE_2D, alphaskytexture);
speedscale = r_realtime * 16;
speedscale -= (int) speedscale & ~127;
speedscale = r_realtime / 16;
speedscale -= floor (speedscale);;
R_DrawSkyLayer (speedscale);
}
if (gl_sky_debug->int_val) {
skydome_debug ();
}
}
inline void