@animech-public/playcanvas

Version:

PlayCanvas WebGL game engine

14 lines (12 loc) • 592 B

JavaScript

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

export { reflDirAnisoPS as default };