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Code Issues 157 Wiki Activity

Add the optional Radius, ShadeSelf, CastShadows and SoftFalloff of FreeSpotLight and make FalloffAngle 360 a point light

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Hirek
2026-10-28 16:18:03 +01:00
parent 413cebed9c
commit c4e23932bf
25 changed files with 327 additions and 72 deletions
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18
shaders/ogl46/common.glsl
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@@ -149,6 +149,24 @@ struct light_s
vec4 headlight_weights;
};
// the falloff of the light of a lamp (SPOT, POINT) with the squared distance Distance2 from its middle. the lamps shine from a
// sphere, of the radius abs(ambient) (see gl::light_element, 0: a point): 1 / d^2 past it and 1 / r^2 within it, as a sphere light
// of blender gives it, or 1 / (d^2 + r^2) with its soft falloff (ambient below 0). a point is no brighter than 0.1 m from it
float lamp_falloff(light_s light, float distance2)
{
float radius = abs(light.ambient);
if (light.ambient < 0.0)
return 1.0 / max(distance2 + radius * radius, 1e-6);
return 1.0 / max(distance2, (radius > 0.0) ? radius * radius : 0.01);
}
// whether the lamp casts shadows: one without a shadow map (headlight_weights.x below 0) has y 1 when it casts none at all (no
// contact shadows either)
bool lamp_casts_shadows(light_s light)
{
return (light.headlight_weights.x >= 0.0) || (light.headlight_weights.y < 0.5);
}
// storage blocks are guaranteed only in fragment and compute shaders (GL 4.6 minimum for the other stages is 0)
#if defined(STAGE_FRAGMENT) || defined(STAGE_COMPUTE)
layout(std430, binding = LIGHT_SSBO_BINDING) readonly buffer light_ssbo