Struct ArcRing

pub struct ArcRing {
    pub vertices: Vec<ArcVertex>,
}

A closed boundary whose edges may be arcs.

Always closed: the edge leaving the last vertex returns to the first. An explicitly repeated closing vertex is therefore a zero-length edge and is refused by validate_arc_ring.

Fields

vertices: Vec<ArcVertex>

Boundary vertices in order.

Implementations

impl ArcRing

pub fn new(vertices: Vec<ArcVertex>) -> Self

Build a ring from vertices.

pub fn from_points(points: &[Point2]) -> Self

Build a straight-edged ring, the polygonal case.

pub fn circle(centre: Point2, radius: f64) -> Self

A full circle as two semicircular edges.

Two vertices is the minimum honest encoding of a circle: one vertex would make the chord degenerate and the centre ambiguous, which is why validate_arc_ring requires at least two.

pub fn edge_count(&self) -> usize

Number of edges, which equals the number of vertices.

pub fn is_polygonal(&self) -> bool

True when every edge is straight.

Trait Implementations

impl Clone for ArcRing

fn clone(&self) -> ArcRing

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ArcRing

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

Formats the value using the given formatter.

impl PartialEq for ArcRing

fn eq(&self, other: &ArcRing) -> 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 ArcRing