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    #[derive(Default, Debug, Clone)]
    pub struct Vertex2D {
        pub position: [f32; 2]
    }

    #[derive(Default, Debug, Clone)]
    pub struct ColoredVertex2D {
        pub position: [f32; 2],
        pub color   : [f32; 4],
    }

    vulkano::impl_vertex!(ColoredVertex2D, position, color);
    vulkano::impl_vertex!(Vertex2D, position);

    impl From<(f32, f32)> for Vertex2D {
        fn from(item: (f32, f32)) -> Self {
            Vertex2D { position: [item.0, item.1] }
        }
    }

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