playcanvas

Version:
Open-source WebGL/WebGPU 3D engine for the web
26 lines (25 loc) • 982 B
JavaScript
var anisotropy_default = `
#ifdef LIT_GGX_SPECULAR
	uniform material_anisotropyIntensity: f32;
	uniform material_anisotropyRotation: vec2f;
#endif
fn getAnisotropy() {
	dAnisotropy = 0.0;
	dAnisotropyRotation = vec2f(1.0, 0.0);
#ifdef LIT_GGX_SPECULAR
	dAnisotropy = uniform.material_anisotropyIntensity;
	dAnisotropyRotation = uniform.material_anisotropyRotation;
#endif
#ifdef STD_ANISOTROPY_TEXTURE
	let anisotropyTex: vec3f = textureSampleBias({STD_ANISOTROPY_TEXTURE_NAME}, {STD_ANISOTROPY_TEXTURE_NAME}Sampler, {STD_ANISOTROPY_TEXTURE_UV}, uniform.textureBias).rgb;
	dAnisotropy *= anisotropyTex.b;
	let anisotropyRotationFromTex: vec2f = anisotropyTex.rg * 2.0 - vec2f(1.0);
	let rotationMatrix: mat2x2f = mat2x2f(dAnisotropyRotation.x, dAnisotropyRotation.y, -dAnisotropyRotation.y, dAnisotropyRotation.x);
	dAnisotropyRotation = rotationMatrix * anisotropyRotationFromTex;
#endif
	dAnisotropy = clamp(dAnisotropy, 0.0, 1.0);
}
`;
export {
	anisotropy_default as default
};