playcanvas/build/playcanvas/src/scene/shader-lib/glsl/chunks/lit/frag/reflectionEnvHQ.js

PlayCanvas WebGL game engine

var reflectionEnvHQPS = `
#ifndef ENV_ATLAS
	#define ENV_ATLAS
	uniform sampler2D texture_envAtlas;
#endif
uniform samplerCube texture_cubeMap;
uniform float material_reflectivity;
vec3 calcReflection(vec3 reflDir, float gloss) {
	vec3 dir = cubeMapProject(reflDir) * vec3(-1.0, 1.0, 1.0);
	vec2 uv = toSphericalUv(dir);
	float level = saturate(1.0 - gloss) * 5.0;
	float ilevel = floor(level);
	float flevel = level - ilevel;
	vec3 sharp = {reflectionCubemapDecode}(textureCube(texture_cubeMap, dir));
	vec3 roughA = {reflectionDecode}(texture2D(texture_envAtlas, mapRoughnessUv(uv, ilevel)));
	vec3 roughB = {reflectionDecode}(texture2D(texture_envAtlas, mapRoughnessUv(uv, ilevel + 1.0)));
	return processEnvironment(mix(sharp, mix(roughA, roughB, flevel), min(level, 1.0)));
}
void addReflection(vec3 reflDir, float gloss) {   
	dReflection += vec4(calcReflection(reflDir, gloss), material_reflectivity);
}
`;

export { reflectionEnvHQPS as default };