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light: only do sunlight raytracing in leafs that can see sky

This commit is contained in:
Eric Wasylishen 2016-04-22 19:27:17 -06:00
parent d309aa02b0
commit 5000f9d352
1 changed files with 23 additions and 1 deletions
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24
light/ltface.c
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@ -712,7 +712,7 @@ Pvs_LeafVisible(const bsp2_t *bsp, const byte *pvs, const bsp2_dleaf_t *leaf)
return !!(pvs[visleaf>>3] & (1<<(visleaf&7)));
}
static void
void
CalcPvs(const bsp2_t *bsp, lightsurf_t *lightsurf)
{
const int pvssize = DecompressedVisSize(bsp);
@ -764,6 +764,24 @@ CalcPvs(const bsp2_t *bsp, lightsurf_t *lightsurf)
free(leafpvs);
// set lightsurf->skyvisible
lightsurf->skyvisible = false;
for (int i = 0; i < bsp->numleafs; i++) {
const bsp2_dleaf_t *leaf = &bsp->dleafs[i];
if (Pvs_LeafVisible(bsp, lightsurf->pvs, leaf)) {
// we can see this leaf, search for sky faces in it
for (int k = 0; k < leaf->nummarksurfaces; k++) {
const bsp2_dface_t *surf = &bsp->dfaces[bsp->dmarksurfaces[leaf->firstmarksurface + k]];
const char *texname = Face_TextureName(bsp, surf);
if (!strncmp("sky", texname, 3)) {
lightsurf->skyvisible = true;
break;
}
}
}
if (lightsurf->skyvisible)
break; // we are done
}
}
__attribute__((noinline))
@ -1344,6 +1362,10 @@ LightFace_Sky(const sun_t *sun, const lightsurf_t *lightsurf, lightmap_t *lightm
lightmap_t *lightmap;
qboolean curved = lightsurf->curved;
/* If vis data says we can't see any sky faces, skip raytracing */
if (!lightsurf->skyvisible)
return;
/* Don't bother if surface facing away from sun */
if (DotProduct(sun->sunvec, plane->normal) < -ANGLE_EPSILON && !curved)
return;