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Cleanup in VSM code

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This commit is contained in:
karl 2021-06-21 23:34:18 +02:00
parent a1f8df808b
commit 140d85470d
1 changed files with 6 additions and 4 deletions
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10
Shader/bump.fs
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@ -53,7 +53,7 @@ vec2 get_parallax_offset_uv(vec2 uv, vec3 view_direction) {
current_layer_depth += refinement_layer_depth;
}
// Referse the UV operation again and return the result
// Reverse the UV operation again and return the result
current_uv += uv_refine_shift_per_layer;
return current_uv;
@ -78,17 +78,19 @@ float get_shadow(vec4 fragPosLightSpace, vec3 normal) {
// get closest depth value from light's perspective (using [0,1] range fragPosLight as coords)
mediump float closestDepth = moments.r;
mediump float depth_squared = moments.g;
// get depth of current fragment from light's perspective
mediump float currentDepth = projCoords.z;
// check whether current frag pos is in shadow
float p = step(projCoords.z, moments.x);
float p = step(currentDepth, closestDepth);
// We divide by this later, so make sure it's not exactly 0
// It seems like it should always be 0.0, but due to interpolation it's not -- it increases with the deviation!
// A larger second parameter to max() means more blur (but also more light bleeding)
float variance = max(moments.y - moments.x * moments.x, (-0.01 + (currentDepth - closestDepth) * 0.7) * 0.1);
float variance = max(depth_squared - closestDepth * closestDepth, (-0.01 + (currentDepth - closestDepth) * 0.7) * 0.1);
float d = projCoords.z - moments.x * 1.0;
float d = currentDepth - closestDepth;
// Use linear_step to prevent light bleeding
float p_max = linear_step(0.2, 1.0, variance / (variance + d * d));