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tweak sampling for SSAO, shadow filters.

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Xonk
2023-10-11 16:28:28 -04:00
parent 2f92a6eff0
commit 87d25d0637
5 changed files with 63 additions and 15 deletions
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19
shaders/dimensions/composite1.fsh
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@ -249,6 +249,18 @@ vec2 tapLocation(int sampleNumber, float spinAngle,int nb, float nbRot,float r0)
return vec2(cos_v, sin_v)*ssR;
}
vec2 tapLocation_simple(
int samples, int totalSamples, float rotation, float rng
){
const float PI = 3.141592653589793238462643383279502884197169;
float alpha = float(samples + rng) * (1.0 / float(totalSamples));
float angle = alpha * (rotation * PI);
float sin_v = sin(angle);
float cos_v = cos(angle);
return vec2(cos_v, sin_v) * sqrt(alpha);
}
vec3 viewToWorld(vec3 viewPos) {
vec4 pos;
@ -803,14 +815,19 @@ void main() {
smallbias = -0.0005;
noise = 0.5;
}
projectedShadowPosition = projectedShadowPosition * vec3(0.5,0.5,0.5/6.0) + vec3(0.5);
#ifdef BASIC_SHADOW_FILTER
#ifndef Variable_Penumbra_Shadows
if(LabSSS > 0) smallbias = -0.0002;
#endif
float rdMul = filteredShadow.x*distortFactor*d0*k/shadowMapResolution;
for(int i = 0; i < samples; i++){
vec2 offsetS = tapLocation(i,samples,1.618, noise,0.0);
// vec2 offsetS = tapLocation(i,samples,1.618, noise,0.0);
vec2 offsetS = tapLocation_simple(i, 7, 9, noise) * 0.5;
float isShadow = shadow2D(shadow, projectedShadowPosition + vec3(rdMul*offsetS, smallbias) ).x;
Shadows += isShadow/samples;