Bliss-Shader/shaders/lib/Shadows.glsl
2023-10-07 22:18:20 -04:00

23 lines
812 B
GLSL

// Emin's and Gri's combined ideas to stop peter panning and light leaking, also has little shadowacne so thats nice
// https://www.complementary.dev/reimagined
// https://github.com/gri573
void GriAndEminShadowFix(
inout vec3 WorldPos,
vec3 FlatNormal,
float VanillaAO,
float SkyLightmap,
bool Entities
){
float DistanceOffset = clamp(0.17 + length(WorldPos) / (shadowMapResolution*0.20), 0.0,1.0) ;
vec3 Bias = FlatNormal * DistanceOffset; // adjust the bias thingy's strength as it gets farther away.
vec3 finalBias = Bias;
// stop lightleaking
vec2 scale = vec2(0.5); scale.y *= 0.5;
vec3 zoomShadow = scale.y - scale.x * fract(WorldPos + cameraPosition + Bias*scale.y);
if(SkyLightmap < 0.1 && !Entities) finalBias = mix(Bias, zoomShadow, clamp(VanillaAO*5,0,1));
WorldPos += finalBias;
}