Chunk.rs

fn create_face(
    x: f32, y: f32, z: f32,
    face: Face,
) -> Vec<engine::model::ModelVertex> {
    let mut vertices = Vec::new();

    println!("Creating face: {:?}", face);

    let (x_axis, y_axis, z_axis, x_off, y_off, z_off, norm_x, norm_y, norm_z) = match face {
        Face::Top => (1.0, 0.0, 1.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0),
        Face::Bottom => (1.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, -1.0, 0.0),
        Face::North => (1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, -1.0),
        Face::South => (1.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0),
        Face::East => (0.0, 0.0, 1.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0),
        Face::West => (0.0, 0.0, 1.0, 0.0, 0.0, 0.0, -1.0, 0.0, 0.0),
    };

    let top_left = (x + x_off, y + y_off, z + z_off, 0.0, 0.0);
    let top_right = (x + x_off + x_axis, y + y_off, z + z_off, 0.0, 1.0);
    let bottom_left = (x + x_off, y + y_off + y_axis, z + z_off + z_axis, 1.0, 0.0);
    let bottom_right = (x + x_off + x_axis, y + y_off + y_axis, z + z_off + z_axis, 1.0, 1.0);
    
    let vertices_data = [
        top_left, bottom_left, bottom_right,
        top_left, bottom_right, top_right,
    ];

    for (x, y, z, u, v) in vertices_data.iter() {
        vertices.push(engine::model::ModelVertex {
            position: [*x, *y, *z],
            normal: [norm_x, norm_y, norm_z],
            tex_coords: [*u, *v],
            bitangent: [0.0, 0.0, 0.0],
            tangent: [0.0, 0.0, 0.0],
        });
    }

    vertices

}