@animech-public/playcanvas/build/playcanvas/src/scene/shader-lib/chunks/lit/frag/lightSheen.js

PlayCanvas WebGL game engine

var o="\nfloat sheenD(vec3 normal, vec3 h, float roughness) {\n\tfloat invR = 1.0 / (roughness * roughness);\n\tfloat cos2h = max(dot(normal, h), 0.0);\n\tcos2h *= cos2h;\n\tfloat sin2h = max(1.0 - cos2h, 0.0078125);\n\treturn (2.0 + invR) * pow(sin2h, invR * 0.5) / (2.0 * PI);\n}\nfloat sheenV(vec3 normal, vec3 viewDir, vec3 light) {\n\tfloat NoV = max(dot(normal, viewDir), 0.000001);\n\tfloat NoL = max(dot(normal, light), 0.000001);\n\treturn 1.0 / (4.0 * (NoL + NoV - NoL * NoV));\n}\nfloat getLightSpecularSheen(vec3 h, vec3 worldNormal, vec3 viewDir, vec3 lightDirNorm, float sheenGloss) {\n\tfloat D = sheenD(worldNormal, h, sheenGloss);\n\tfloat V = sheenV(worldNormal, viewDir, -lightDirNorm);\n\treturn D * V;\n}\n";export{o as default};