fn Bad(index : u32, rd : vec3<f32>) -> vec3<f32> { var normal : vec3<f32> = vec3<f32>(0.0); normal[index] = -(sign(rd[index])); return normalize(normal); } [[block]] struct S { v : vec3<f32>; i : u32; }; [[binding(0), group(0)]] var<storage, read_write> io : S; [[stage(compute), workgroup_size(1)]] fn main([[builtin(local_invocation_index)]] idx : u32) { io.v = Bad(io.i, io.v); }