Custom derive for glium Vertex
extern crate glium;
#[macro_use]
extern crate glium_derive;
#[derive(Clone, Copy, Vertex)]
struct MyVertex {
#[glium(attr = "a_pos")
pos: [f32; 3],
#[glium(attr = "a_uv")
uv: [f32; 2],
#[glium(attr = "a_color", normalize)
color: u32,
}