17 lines
580 B
GLSL
17 lines
580 B
GLSL
|
|
#ifdef LIGHT_ATTENUATION_INVERSE_SQUARE
|
|
|
|
float distanceAttenuation(float dist, float radius, float strength, float linearity)
|
|
{
|
|
// light.radius >= 1000000.0 is sunlight, skip attenuation
|
|
if(light.radius >= 1000000.0) return 1.0;
|
|
float a = dist / radius;
|
|
float b = clamp(1.0 - a * a * a * a, 0.0, 1.0);
|
|
return mix((b * b) / (dist * dist + 1.0) * strength, clamp((radius - dist) / radius, 0.0, 1.0), linearity);
|
|
}
|
|
|
|
#else //elif defined(LIGHT_ATTENUATION_LINEAR)
|
|
|
|
#define distanceAttenuation(dist, radius, strength, linearity) clamp((radius - dist) / radius, 0.0, 1.0)
|
|
|
|
#endif
|