Struct Polygon 

pub struct Polygon { /* private fields */ }

A set of vertices with a topology type and orientation query.

Mirrors the C++ Polygon<Vector> template. The base Polygon::is_valid requires at least one vertex; crate::Wgs84Polygon wraps this and overrides validity to require at least three.

Implementations

impl Polygon

pub fn new(polygon_type: PolygonType) -> Self

Construct an empty polygon of the given type.

pub fn with_vertices(polygon_type: PolygonType, vertices: Vec<Wgs84>) -> Self

Construct a polygon of the given type with the supplied vertices.

pub fn add_vertex(&mut self, position: Wgs84)

Append a single vertex.

pub fn add_vertices(&mut self, vertices: &[Wgs84])

Append a list of vertices, in order.

pub fn get(&self, index: usize) -> Wgs84

Get a vertex by index (panics on out-of-bounds, like C++ operator[]).

pub fn set(&mut self, index: usize, value: Wgs84)

Set a vertex by index.

pub fn len(&self) -> usize

Number of vertices.

pub fn is_empty(&self) -> bool

Whether the polygon has no vertices.

pub fn polygon_type(&self) -> PolygonType

Get the polygon type.

pub fn set_type(&mut self, polygon_type: PolygonType)

Set the polygon type.

pub fn is_valid(&self) -> bool

Whether this is a valid polygon.

Base implementation: at least one vertex. crate::Wgs84Polygon requires at least three.

pub fn vertices(&self) -> &[Wgs84]

Get the (shared) slice of vertices.

pub fn vertices_mut(&mut self) -> &mut Vec<Wgs84>

Get the mutable Vec of vertices.

pub fn orientation(&self) -> Orientation

Compute the winding order via the signed shoelace formula.

Only works for SimplePolygon and a single-triangle TriangleList (exactly 3 vertices). All other types return InvalidOrientation without computing area. Collinear vertices (zero area) also return InvalidOrientation.

Uses raw (lon, lat) doubles; no normalization.

Trait Implementations

impl Clone for Polygon

fn clone(&self) -> Polygon

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Polygon

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

Formats the value using the given formatter.

impl PartialEq for Polygon

fn eq(&self, other: &Polygon) -> 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 StructuralPartialEq for Polygon