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Tune shadow perspective distortion (#12146)

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* Pass perspective distortion parameters as uniforms
* Set all perspective bias parameters via ShadowRenderer
* Recalibrate perspective distortion and shadow range to render less shadow geometry with the same quality and observed shadow distance
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x2048
2022-03-31 22:40:06 +02:00
committed by GitHub
parent 06d197cdd0
commit 31578303a4
12 changed files with 117 additions and 59 deletions
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10
client/shaders/shadow_shaders/pass1_vertex.glsl
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@@ -1,15 +1,15 @@
uniform mat4 LightMVP; // world matrix
varying vec4 tPos;
const float bias0 = 0.9;
const float zPersFactor = 0.5;
const float bias1 = 1.0 - bias0 + 1e-6;
uniform float xyPerspectiveBias0;
uniform float xyPerspectiveBias1;
uniform float zPerspectiveBias;
vec4 getPerspectiveFactor(in vec4 shadowPosition)
{
float pDistance = length(shadowPosition.xy);
float pFactor = pDistance * bias0 + bias1;
shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPersFactor);
float pFactor = pDistance * xyPerspectiveBias0 + xyPerspectiveBias1;
shadowPosition.xyz *= vec3(vec2(1.0 / pFactor), zPerspectiveBias);
return shadowPosition;
}