playcanvas

Version:
Open-source WebGL/WebGPU 3D engine for the web
19 lines (18 loc) • 911 B
JavaScript
var reflDirAniso_default = `
fn getReflDir(worldNormal: vec3f, viewDir: vec3f, gloss: f32, tbn: mat3x3f) {
	let roughness: f32 = sqrt(1.0 - min(gloss, 1.0));
	let direction: vec2f = dAnisotropyRotation;
	let anisotropicT: vec3f = normalize(tbn * vec3f(direction, 0.0));
	let anisotropicB: vec3f = normalize(cross(tbn[2], anisotropicT));
	let anisotropy: f32 = dAnisotropy;
	let anisotropicDirection: vec3f = anisotropicB;
	let anisotropicTangent: vec3f = cross(anisotropicDirection, viewDir);
	let anisotropicNormal: vec3f = cross(anisotropicTangent, anisotropicDirection);
	let bendFactor: f32 = 1.0 - anisotropy * (1.0 - roughness);
	let bendFactor4: f32 = bendFactor * bendFactor * bendFactor * bendFactor;
	let bentNormal: vec3f = normalize(mix(normalize(anisotropicNormal), normalize(worldNormal), bendFactor4));
	dReflDirW = reflect(-viewDir, bentNormal);
}`;
export {
	reflDirAniso_default as default
};