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Merge pull request #40958 from clayjohn/VULKAN-shadow-noise

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Improve the quick hash function for all GPUs
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Rémi Verschelde 2020-09-04 10:53:01 +02:00 committed by GitHub
commit 6a03aed5a4
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1 changed files with 6 additions and 2 deletions
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servers/rendering/rasterizer_rd/shaders/scene_high_end.glsl
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@ -681,9 +681,13 @@ LIGHT_SHADER_CODE
#ifndef USE_NO_SHADOWS
// Produces cheap but low-quality white noise, nothing special
// Produces cheap white noise, optmized for window-space
// Comes from: https://www.shadertoy.com/view/4djSRW
// Copyright: Dave Hoskins, MIT License
float quick_hash(vec2 pos) {
return fract(sin(dot(pos * 19.19, vec2(49.5791, 97.413))) * 49831.189237);
vec3 p3 = fract(vec3(pos.xyx) * .1031);
p3 += dot(p3, p3.yzx + 33.33);
return fract((p3.x + p3.y) * p3.z);
}
float sample_directional_pcf_shadow(texture2D shadow, vec2 shadow_pixel_size, vec4 coord) {