playcanvas
Version:
Open-source WebGL/WebGPU 3D engine for the web
27 lines (21 loc) • 732 B
JavaScript
// Spherical Harmonics for SOG GSplat format
var gsplatSogSHVS = /* glsl */ `
uniform highp sampler2D packedShN;
uniform float shN_mins;
uniform float shN_maxs;
void readSHData(out vec3 sh[SH_COEFFS], out float scale) {
// extract spherical harmonics palette index
ivec2 t = ivec2(packedSample.xy & 255u);
int n = t.x + t.y * 256;
int u = (n % 64) * SH_COEFFS;
int v = n / 64;
// calculate offset into the centroids texture and read consecutive texels
for (int i = 0; i < SH_COEFFS; i++) {
sh[i] = mix(vec3(shN_mins), vec3(shN_maxs), unpack111110(pack8888(texelFetch(packedShN, ivec2(u + i, v), 0))));
}
scale = 1.0;
}
`;
export { gsplatSogSHVS as default };