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Code Issues 150 Wiki Activity

Do not cap the reach of a light at 1 km in the cluster culling

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Hirek
2026-10-15 20:25:51 +02:00
parent f47172f34d
commit 624c7f4f0b
1 changed files with 6 additions and 4 deletions
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10
shaders/cluster_cull.comp
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@@ -8,9 +8,11 @@
layout(local_size_x = CLUSTER_CULL_GROUP_SIZE) in;
// a light is taken to end where its brightest possible contribution drops under this, a fraction of
// what the display can tell apart. no light reaches further than MAX_RANGE, as with the 1 km filter on the cpu side
// what the display can tell apart. there is no other limit: the 1 km filter on the cpu side is about the distance of a light
// from the camera, not about how far it reaches, and the shading lights a surface at any distance
const float MIN_CONTRIBUTION = 1.0 / 1024.0;
const float MAX_RANGE = 1000.0;
// reach of a light whose contribution does not fall off with the distance; its square still fits in a float
const float UNLIMITED_RANGE = 1.0e18;
// the boxes and the light data are floats: planes of the headlight projection let this much (in meters) of a box through
const float PLANE_MARGIN = 0.05;
@@ -40,10 +42,10 @@ float light_range(light_s light)
float b = light.linear;
float c = 1.0 - k;
float denominator = b + sqrt(b * b - 4.0 * a * c);
return (denominator > 1e-12) ? min(-2.0 * c / denominator, MAX_RANGE) : MAX_RANGE;
return (denominator > 1e-12) ? min(-2.0 * c / denominator, UNLIMITED_RANGE) : UNLIMITED_RANGE;
}
// point and spot lights fall off with the square of the distance
return min(sqrt(k), MAX_RANGE);
return sqrt(k);
}
bool sphere_touches_box(vec3 center, float radius, vec3 lower, vec3 upper)