playcanvas

Version:
PlayCanvas WebGL game engine
27 lines (25 loc) • 1.19 kB
JavaScript
var reflectionEnvHQPS = `
#ifndef ENV_ATLAS
	#define ENV_ATLAS
	var texture_envAtlas: texture_2d<f32>;
	var texture_envAtlasSampler: sampler;
#endif
var texture_cubeMap: texture_cube<f32>;
var texture_cubeMapSampler: sampler;
uniform material_reflectivity: f32;
fn calcReflection(reflDir: vec3f, gloss: f32) -> vec3f {
	let dir: vec3f = cubeMapProject(reflDir) * vec3f(-1.0, 1.0, 1.0);
	let uv: vec2f = toSphericalUv(dir);
	let level: f32 = saturate(1.0 - gloss) * 5.0;
	let ilevel: f32 = floor(level);
	let flevel: f32 = level - ilevel;
	let sharp: vec3f = {reflectionCubemapDecode}(textureSample(texture_cubeMap, texture_cubeMapSampler, dir));
	let roughA: vec3f = {reflectionDecode}(textureSample(texture_envAtlas, texture_envAtlasSampler, mapRoughnessUv(uv, ilevel)));
	let roughB: vec3f = {reflectionDecode}(textureSample(texture_envAtlas, texture_envAtlasSampler, mapRoughnessUv(uv, ilevel + 1.0)));
	return processEnvironment(mix(sharp, mix(roughA, roughB, flevel), min(level, 1.0)));
}
fn addReflection(reflDir: vec3f, gloss: f32) {
	dReflection = dReflection + vec4f(calcReflection(reflDir, gloss), uniform.material_reflectivity);
}
`;

export { reflectionEnvHQPS as default };