i_overlay 4.5.0

Boolean Operations for 2D Polygons: Supports intersection, union, difference, xor, and self-intersections for all polygon varieties.
Documentation 
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use crate::geom::line_range::LineRange;
use core::cmp::Ordering;
use i_float::int::point::IntPoint;

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub(crate) struct XSegment {
    pub(crate) a: IntPoint,
    pub(crate) b: IntPoint,
}

impl XSegment {
    #[inline(always)]
    pub(crate) fn y_range(&self) -> LineRange {
        if self.a.y < self.b.y {
            LineRange {
                min: self.a.y,
                max: self.b.y,
            }
        } else {
            LineRange {
                min: self.b.y,
                max: self.a.y,
            }
        }
    }

    #[inline(always)]
    pub(crate) fn is_not_vertical(&self) -> bool {
        self.a.x != self.b.x
    }

    #[inline(always)]
    pub(crate) fn is_not_intersect_y_range(&self, range: &LineRange) -> bool {
        range.min > self.a.y && range.min > self.b.y || range.max < self.a.y && range.max < self.b.y
    }
}

impl PartialOrd for XSegment {
    #[inline(always)]
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        Some(self.cmp(other))
    }
}

impl Ord for XSegment {
    #[inline(always)]
    fn cmp(&self, other: &Self) -> Ordering {
        let a = self.a.cmp(&other.a);
        if a == Ordering::Equal {
            self.b.cmp(&other.b)
        } else {
            a
        }
    }
}