playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
43 lines (42 loc) • 1.39 kB
JavaScript
var ambient_default = `
uniform ambientSH: array<vec3f, 9>;
var texture_envAtlas: texture_2d<f32>;
var texture_envAtlasSampler: sampler;
fn addAmbient(worldNormal: vec3f) {
let n: vec3f = cubeMapRotate(worldNormal);
let color: vec3f =
uniform.ambientSH[0] +
uniform.ambientSH[1] * n.x +
uniform.ambientSH[2] * n.y +
uniform.ambientSH[3] * n.z +
uniform.ambientSH[4] * n.x * n.z +
uniform.ambientSH[5] * n.z * n.y +
uniform.ambientSH[6] * n.y * n.x +
uniform.ambientSH[7] * (3.0 * n.z * n.z - 1.0) +
uniform.ambientSH[8] * (n.x * n.x - n.y * n.y);
dDiffuseLight += processEnvironment(max(color, vec3f(0.0)));
let dir: vec3f = normalize(cubeMapRotate(worldNormal) * vec3f(-1.0, 1.0, 1.0));
let uv: vec2f = mapUv(toSphericalUv(dir), vec4f(128.0, 256.0 + 128.0, 64.0, 32.0) / atlasSize);
let raw: vec4f = textureSample(texture_envAtlas, texture_envAtlasSampler, uv);
let linear: vec3f = {ambientDecode}(raw);
dDiffuseLight += processEnvironment(linear);
dDiffuseLight += uniform.light_globalAmbient;
}
`;
export {
ambient_default as default
};