playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
47 lines (46 loc) • 1.35 kB
JavaScript
var sogSH_default = `
uniform shN_mins: f32;
uniform shN_maxs: f32;
fn readSHTexel(u: i32, v: i32) -> half3 {
let t = textureLoad(sh_centroids, vec2i(u, v), 0);
let idx = vec3i(t.xyz * 255.0 + 0.5);
return half3(vec3f(lutShN(idx.x), lutShN(idx.y), lutShN(idx.z)));
return mix(half3(half(uniform.shN_mins)), half3(half(uniform.shN_maxs)), half3(t.xyz));
}
fn readSHData(sh: ptr<function, array<half3, SH_COEFFS>>, scale: ptr<function, f32>) {
let labels = textureLoad(sh_labels, splat.uv, 0);
let n = i32(labels.x * 255.0 + 0.5) + i32(labels.y * 255.0 + 0.5) * 256;
let u = (n % 64) * SH_COEFFS;
let v = n / 64;
sh[0] = readSHTexel(u, v);
sh[1] = readSHTexel(u + 1, v);
sh[2] = readSHTexel(u + 2, v);
sh[3] = readSHTexel(u + 3, v);
sh[4] = readSHTexel(u + 4, v);
sh[5] = readSHTexel(u + 5, v);
sh[6] = readSHTexel(u + 6, v);
sh[7] = readSHTexel(u + 7, v);
sh[8] = readSHTexel(u + 8, v);
sh[9] = readSHTexel(u + 9, v);
sh[10] = readSHTexel(u + 10, v);
sh[11] = readSHTexel(u + 11, v);
sh[12] = readSHTexel(u + 12, v);
sh[13] = readSHTexel(u + 13, v);
sh[14] = readSHTexel(u + 14, v);
*scale = 1.0;
}
`;
export {
sogSH_default as default
};