Function grid

tools/grid.rs:123–141

(
    width: usize,
    height: usize,
    size_x: f64,
    size_y: f64,
    grid_type: GridType,
)

}

fn grid(
    width: usize,
    height: usize,
    size_x: f64,
    size_y: f64,
    grid_type: GridType,
) -> GeometryGraph<Undirected> {
    if width == 0 || height == 0 {
        return GeometryGraph::<Undirected>::default();
    }

    match grid_type {
        GridType::Triangle => tri_grid(width, height, size_x, size_y),
        GridType::Quad => quad_grid(width, height, size_x, size_y),
        GridType::Ragged => ragged_grid(width, height, size_x, size_y),
        GridType::Hexagon => hex_grid(width, height, size_x, size_y),
        GridType::Radial => unreachable!("Radial grid types are implemented differently"),
    }
}

fn tri_i2x(i: usize, size_x: f64, odd: bool) -> f64 {
    let mut x = (i as f64) * size_x;