LybOutlines/shaders/lib/materials/materialMethods/generatedNormals.glsl
2024-06-25 14:45:54 +02:00

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2.8 KiB
GLSL

const float normalThreshold = 0.05;
const float normalClamp = 0.2;
const float packSizeGN = 128.0;
#ifndef GBUFFERS_HAND
const float normalMult = GENERATED_NORMAL_MULT * 0.025;
#else
const float normalMult = GENERATED_NORMAL_MULT * 0.015;
#endif
float GetDif(float lOriginalAlbedo, vec2 offsetCoord) {
#ifndef GBUFFERS_WATER
float lNearbyAlbedo = length(texture2D(tex, offsetCoord).rgb);
#else
vec4 textureSample = texture2D(tex, offsetCoord);
float lNearbyAlbedo = length(textureSample.rgb * textureSample.a * 1.5);
#endif
#ifdef GBUFFERS_ENTITIES
lOriginalAlbedo = abs(lOriginalAlbedo - 1.0);
lNearbyAlbedo = abs(lNearbyAlbedo - 1.0);
#endif
float dif = lOriginalAlbedo - lNearbyAlbedo;
#ifdef GBUFFERS_ENTITIES
dif = -dif;
#endif
#ifndef GBUFFERS_WATER
if (dif > 0.0) dif = max(dif - normalThreshold, 0.0);
else dif = min(dif + normalThreshold, 0.0);
#endif
return clamp(dif, -normalClamp, normalClamp);
}
void GenerateNormals(inout vec3 normalM, vec3 color) {
#ifndef ENTITY_GN_AND_CT
#if defined GBUFFERS_ENTITIES || defined GBUFFERS_HAND
return;
#endif
#endif
vec2 absMidCoordPos2 = absMidCoordPos * 2.0;
float lOriginalAlbedo = length(color.rgb);
float normalMult = max0(1.0 - mipDelta) * normalMult;
#ifndef SAFER_GENERATED_NORMALS
vec2 offsetR = 16.0 / atlasSizeM;
#else
vec2 offsetR = max(absMidCoordPos2.x, absMidCoordPos2.y) * vec2(float(atlasSizeM.y) / float(atlasSizeM.x), 1.0);
#endif
offsetR /= packSizeGN;
vec2 midCoord = texCoord - midCoordPos;
vec2 maxOffsetCoord = midCoord + absMidCoordPos;
vec2 minOffsetCoord = midCoord - absMidCoordPos;
if (normalMult > 0.0) {
vec3 normalMap = vec3(0.0, 0.0, 1.0);
vec2 offsetCoord = texCoord + vec2( 0.0, offsetR.y);
if (offsetCoord.y < maxOffsetCoord.y)
normalMap.y += GetDif(lOriginalAlbedo, offsetCoord);
offsetCoord = texCoord + vec2( offsetR.x, 0.0);
if (offsetCoord.x < maxOffsetCoord.x)
normalMap.x += GetDif(lOriginalAlbedo, offsetCoord);
offsetCoord = texCoord + vec2( 0.0,-offsetR.y);
if (offsetCoord.y > minOffsetCoord.y)
normalMap.y -= GetDif(lOriginalAlbedo, offsetCoord);
offsetCoord = texCoord + vec2(-offsetR.x, 0.0);
if (offsetCoord.x > minOffsetCoord.x)
normalMap.x -= GetDif(lOriginalAlbedo, offsetCoord);
normalMap.xy *= normalMult;
normalMap.xy = clamp(normalMap.xy, vec2(-1.0), vec2(1.0));
if (normalMap.xy != vec2(0.0, 0.0))
normalM = clamp(normalize(normalMap * tbnMatrix), vec3(-1.0), vec3(1.0));
}
}