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light: test spotlight cone before ray tracing 

Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>
This commit is contained in:
Kevin Shanahan 2013-03-03 12:56:10 +10:30
parent bea0f0f983
commit 888494f0c1
1 changed files with 9 additions and 8 deletions
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17
light/ltface.c
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@ -501,7 +501,6 @@ SingleLightFace(const entity_t *light, lightinfo_t * l,
const vec3_t faceoffset, const vec3_t colors)
{
vec_t dist;
vec3_t incoming;
vec_t angle;
vec_t add;
const vec_t *surf;
@ -553,19 +552,21 @@ SingleLightFace(const entity_t *light, lightinfo_t * l,
surf = l->surfpt[0];
for (c = 0; c < l->numsurfpt; c++, surf += 3) {
dist = scaledDistance(CastRay(light->origin, surf), light);
if (dist < 0)
continue;
vec3_t ray;
VectorSubtract(light->origin, surf, incoming);
VectorNormalize(incoming);
angle = DotProduct(incoming, l->facenormal);
VectorSubtract(light->origin, surf, ray);
VectorNormalize(ray);
angle = DotProduct(ray, l->facenormal);
if (light->spotlight) {
vec_t falloff = DotProduct(light->spotvec, incoming);
vec_t falloff = DotProduct(light->spotvec, ray);
if (falloff > light->spotfalloff)
continue;
}
dist = scaledDistance(CastRay(light->origin, surf), light);
if (dist < 0)
continue;
angle = (1.0 - scalecos) + scalecos * angle;
add = scaledLight(CastRay(light->origin, surf), light);
add *= angle;