@group(0) @binding(0)
var<storage, read> initiationPositions : array<vec4<f32>>;

@group(0) @binding(1)
var<storage, read_write> positions : array<vec4<f32>>;

@group(0) @binding(2)
var<storage, read_write> velocities : array<vec2<f32>>;

@compute @workgroup_size(64)
fn initialize(@builtin(global_invocation_id) id : vec3<u32>) {

  let i = id.x;

  positions[i] 		= initiationPositions[i];

  velocities[i] 	= vec2<f32>(0.0, 0.0);
}