playcanvas/build/playcanvas.prf/src/scene/shader-lib/wgsl/chunks/gsplat/vert/formats/compressedSH.js

Open-source WebGL/WebGPU 3D engine for the web

var compressedSH_default = `
#if SH_BANDS > 0
fn unpack8888s(bits: u32) -> half4 {
	let unpacked_u = (vec4<u32>(bits) >> vec4<u32>(0u, 8u, 16u, 24u)) & vec4<u32>(0xffu);
	return half4(vec4f(unpacked_u) * (8.0 / 255.0) - 4.0);
}
fn readSHData(sh: ptr<function, array<half3, 15>>, scale: ptr<function, f32>) {
	let shData0: vec4<u32> = loadShTexture0();
	let shData1: vec4<u32> = loadShTexture1();
	let shData2: vec4<u32> = loadShTexture2();
	let r0: half4 = unpack8888s(shData0.x);
	let r1: half4 = unpack8888s(shData0.y);
	let r2: half4 = unpack8888s(shData0.z);
	let r3: half4 = unpack8888s(shData0.w);
	let g0: half4 = unpack8888s(shData1.x);
	let g1: half4 = unpack8888s(shData1.y);
	let g2: half4 = unpack8888s(shData1.z);
	let g3: half4 = unpack8888s(shData1.w);
	let b0: half4 = unpack8888s(shData2.x);
	let b1: half4 = unpack8888s(shData2.y);
	let b2: half4 = unpack8888s(shData2.z);
	let b3: half4 = unpack8888s(shData2.w);
	sh[0] =  half3(r0.x, g0.x, b0.x);
	sh[1] =  half3(r0.y, g0.y, b0.y);
	sh[2] =  half3(r0.z, g0.z, b0.z);
	sh[3] =  half3(r0.w, g0.w, b0.w);
	sh[4] =  half3(r1.x, g1.x, b1.x);
	sh[5] =  half3(r1.y, g1.y, b1.y);
	sh[6] =  half3(r1.z, g1.z, b1.z);
	sh[7] =  half3(r1.w, g1.w, b1.w);
	sh[8] =  half3(r2.x, g2.x, b2.x);
	sh[9] =  half3(r2.y, g2.y, b2.y);
	sh[10] = half3(r2.z, g2.z, b2.z);
	sh[11] = half3(r2.w, g2.w, b2.w);
	sh[12] = half3(r3.x, g3.x, b3.x);
	sh[13] = half3(r3.y, g3.y, b3.y);
	sh[14] = half3(r3.z, g3.z, b3.z);
	*scale = 1.0;
}
#endif
`;
export {
	compressedSH_default as default
};