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Change normal bias for entities to avoid shadow acne

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This commit is contained in:
Dmitry Kostenko 2022-02-14 09:00:55 +01:00 • committed by x2048
parent 12896b22d8
commit 25c1974e0d
2 changed files with 12 additions and 11 deletions
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13
client/shaders/object_shader/opengl_vertex.glsl
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@ -36,6 +36,8 @@ const vec3 artificialLight = vec3(1.04, 1.04, 1.04);
varying float vIDiff;
const float e = 2.718281828459;
const float BS = 10.0;
const float bias0 = 0.9;
const float bias1 = 1.0 - bias0;
#ifdef ENABLE_DYNAMIC_SHADOWS
// custom smoothstep implementation because it's not defined in glsl1.2
@ -104,8 +106,15 @@ void main(void)
#ifdef ENABLE_DYNAMIC_SHADOWS
vec3 nNormal = normalize(vNormal);
cosLight = dot(nNormal, -v_LightDirection);
float texelSize = 767.0 / f_textureresolution;
float slopeScale = clamp(1.0 - abs(cosLight), 0.0, 1.0);
// Calculate normal offset scale based on the texel size adjusted for
// curvature of the SM texture. This code must be change together with
// getPerspectiveFactor or any light-space transformation.
float distanceToPlayer = length((eyePosition - worldPosition).xyz) / f_shadowfar;
float perspectiveFactor = distanceToPlayer * bias0 + bias1;
float texelSize = 1.0 / f_textureresolution;
texelSize *= f_shadowfar * perspectiveFactor / (bias1 / perspectiveFactor - texelSize * bias0) * 0.15;
float slopeScale = clamp(pow(1.0 - cosLight*cosLight, 0.5), 0.0, 1.0);
normalOffsetScale = texelSize * slopeScale;
if (f_timeofday < 0.2) {