i_overlay 4.5.1

Boolean Operations for 2D Polygons: Supports intersection, union, difference, xor, and self-intersections for all polygon varieties.
Documentation 
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#[cfg(test)]
mod tests {
    use i_float::int::point::IntPoint;
    use i_overlay::core::fill_rule::FillRule;
    use i_overlay::core::overlay::{Overlay, ShapeType};

    #[test]
    fn test_00() {
        let mut overlay = Overlay::new(1);
        overlay.add_contour(&[IntPoint::new(0, 0)], ShapeType::Subject);

        let graph = overlay.build_graph_view(FillRule::NonZero);
        assert!(graph.is_none());
    }

    #[test]
    fn test_01() {
        let mut overlay = Overlay::new(1);
        overlay.add_contour(&[IntPoint::new(0, 0), IntPoint::new(1, 0)], ShapeType::Subject);

        let graph = overlay.build_graph_view(FillRule::NonZero);
        assert!(graph.is_none());
    }
}