playcanvas/build/playcanvas.prf/src/scene/shader-lib/chunks/lit/frag/reflDirAniso.js

PlayCanvas WebGL game engine

var reflDirAnisoPS = "\nvoid getReflDir(vec3 worldNormal, vec3 viewDir, float gloss, mat3 tbn) {\n	float roughness = sqrt(1.0 - min(gloss, 1.0));\n	float anisotropy = material_anisotropy * roughness;\n	vec3 anisotropicDirection = anisotropy >= 0.0 ? tbn[1] : tbn[0];\n	vec3 anisotropicTangent = cross(anisotropicDirection, viewDir);\n	vec3 anisotropicNormal = cross(anisotropicTangent, anisotropicDirection);\n	vec3 bentNormal = normalize(mix(normalize(worldNormal), normalize(anisotropicNormal), anisotropy));\n	dReflDirW = reflect(-viewDir, bentNormal);\n}\n";

export { reflDirAnisoPS as default };