fn make_mesh(world: &mut World) -> Handle<Mesh>
{
    use amethyst::renderer::rendy::mesh::{MeshBuilder, Position, Normal, TexCoord, Tangent};
    use amethyst::renderer::types::MeshData;

    let loader = world.read_resource::<Loader>();

    let verts = vec![
        Position([-1.0, -1.0, 0.0]),
        Position([ 1.0, -1.0, 0.0]),
        Position([ 1.0,  1.0, 0.0]),
        Position([-1.0,  1.0, 0.0]),
    ];

    // speculative
    let norms = vec![
        Normal([0.0, 0.0, 0.0]),
        Normal([0.0, 0.0, 0.0]),
        Normal([0.0, 0.0, 0.0]),
        Normal([0.0, 0.0, 0.0]),
    ];

    // I really don't know what these are meant to do
    let tans = vec![
        // I hope it's [w, x, y, z], because the docs say that w should always be 1 or -1
        Tangent([1.0, 0.0, 0.0, 0.0]),
        Tangent([1.0, 0.0, 0.0, 0.0]),
        Tangent([1.0, 0.0, 0.0, 0.0]),
        Tangent([1.0, 0.0, 0.0, 0.0]),
    ];

    let tex = vec![
        TexCoord([0.0, 0.0]),
        TexCoord([1.0, 0.0]),
        TexCoord([1.0, 1.0]),
        TexCoord([0.0, 1.0]),
    ];

    let mesh_store = &world.read_resource();

    let m = MeshBuilder::new()
        .with_vertices(verts)
        .with_vertices(norms)
        .with_vertices(tans)
        .with_vertices(tex);

    loader.load_from_data(MeshData::from(m), (), mesh_store)
}