Enum PolygonSemantics

pub enum PolygonSemantics {
    Union,
    XOR,
}

Define the ‘inside’ of a polygon. Significant for self-overlapping polygons.

• Union: A point p is inside the polygon if the winding number is larger than 0. This means that if a polygon overlaps with itself or multiple polygons overlap, the overlapping area is always ‘inside’.
• XOR: A point p is inside the polygon if the winding number modulo 2 is larger than 0. This means that if an odd number of polygons overlap, the overlapping area is ‘inside’ the polygon. In case of an even number of overlaps, the overlapping area is ‘outside’.

This plays an important role for self-overlapping polygons and self-overlapping multi-polygons.

Variants

Union

A point p is inside the polygon if the winding number is larger than 0.

XOR

A point p is inside the polygon if the winding number modulo 2 is larger than 0.

Trait Implementations

impl Clone for PolygonSemantics

fn clone(&self) -> PolygonSemantics

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PolygonSemantics

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for PolygonSemantics

fn eq(&self, other: &PolygonSemantics) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for PolygonSemantics

impl Eq for PolygonSemantics

impl StructuralPartialEq for PolygonSemantics