i_overlay 6.0.0

Boolean Operations for 2D Polygons: Supports intersection, union, difference, xor, and self-intersections for all polygon varieties.
Documentation 
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use crate::core::extract::VisitState;
use crate::core::overlay_rule::OverlayRule;
use crate::geom::id_point::IdPoint;
use crate::segm::segment::SegmentFill;
use alloc::vec::Vec;

#[derive(Debug, Clone, Copy)]
pub(crate) struct OverlayLink {
    pub(crate) a: IdPoint,
    pub(crate) b: IdPoint,
    pub(crate) fill: SegmentFill,
}

impl OverlayLink {
    #[inline(always)]
    pub(crate) fn new(a: IdPoint, b: IdPoint, fill: SegmentFill) -> OverlayLink {
        OverlayLink { a, b, fill }
    }

    #[inline(always)]
    pub(crate) fn other(&self, node_id: usize) -> IdPoint {
        if self.a.id == node_id { self.b } else { self.a }
    }

    #[inline(always)]
    pub(crate) fn is_direct(&self) -> bool {
        self.a.point < self.b.point
    }
}

pub(crate) trait OverlayLinkFilter {
    fn filter_by_overlay_into(&self, overlay_rule: OverlayRule, buffer: &mut Vec<VisitState>);
}