@group(0) @binding(0)
var<storage, read> indices: array<u32>;

@group(0) @binding(1)
var<storage, read_write> sortedIndices: array<u32>;

@compute @workgroup_size(64)
fn computeMain(@builtin(global_invocation_id) globalInvocationId: vec3<u32>) {

    let particleIndex = globalInvocationId.x;

    sortedIndices[particleIndex] = indices[particleIndex];

}