playcanvas/build/playcanvas/src/scene/shader-lib/wgsl/chunks/standard/frag/normalMap.js

PlayCanvas WebGL game engine

var normalMapPS = `
#ifdef STD_NORMAL_TEXTURE
	uniform material_bumpiness: f32;
#endif
#ifdef STD_NORMALDETAIL_TEXTURE
	uniform material_normalDetailMapBumpiness: f32;
	fn blendNormals(inN1: vec3f, inN2: vec3f) -> vec3f {
		let n1: vec3f = inN1 + vec3f(0.0, 0.0, 1.0);
		let n2: vec3f = inN2 * vec3f(-1.0, -1.0, 1.0);
		return n1 * dot(n1, n2) / n1.z - n2;
	}
#endif
fn getNormal() {
#ifdef STD_NORMAL_TEXTURE
	var normalMap: vec3f = {STD_NORMAL_TEXTURE_DECODE}(textureSampleBias({STD_NORMAL_TEXTURE_NAME}, {STD_NORMAL_TEXTURE_NAME}Sampler, {STD_NORMAL_TEXTURE_UV}, uniform.textureBias));
	normalMap = mix(vec3f(0.0, 0.0, 1.0), normalMap, uniform.material_bumpiness);
	#ifdef STD_NORMALDETAIL_TEXTURE
		var normalDetailMap: vec3f = {STD_NORMALDETAIL_TEXTURE_DECODE}(textureSampleBias({STD_NORMALDETAIL_TEXTURE_NAME}, {STD_NORMALDETAIL_TEXTURE_NAME}Sampler, {STD_NORMALDETAIL_TEXTURE_UV}, uniform.textureBias));
		normalDetailMap = mix(vec3f(0.0, 0.0, 1.0), normalDetailMap, uniform.material_normalDetailMapBumpiness);
		normalMap = blendNormals(normalMap, normalDetailMap);
	#endif
	dNormalW = normalize(dTBN * normalMap);
#else
	dNormalW = dVertexNormalW;
#endif
}
`;

export { normalMapPS as default };