Trait HalfEdge

pub trait HalfEdge: Clone + Eq {
    type Face: Face<Vertex = Self::Vertex, HalfEdge = Self>;
    type Vertex: Vertex<Face = Self::Face, HalfEdge = Self>;

    // Required methods
    fn length(&self) -> f64;
    fn angle(&self) -> f64;
    fn inside(&self) -> Self::Face;
    fn start(&self) -> Self::Vertex;
    fn complement(&self) -> Self;
    fn prev(&self) -> Self;
    fn next(&self) -> Self;

    // Provided methods
    fn side_index(&self) -> usize { ... }
    fn outgoing_index(&self) -> usize { ... }
}

Represents one “side” or direction of an edge on a Sphere.

Half-edges are oriented such that they go counter-clockwise around their inside face.

Required Associated Types

type Face: Face<Vertex = Self::Vertex, HalfEdge = Self>

The type of Face on the sphere.

type Vertex: Vertex<Face = Self::Face, HalfEdge = Self>

The type of Vertex on the sphere.

Required Methods

fn length(&self) -> f64

The length of the edge.

For edges that are geodesics, this is equivalent to the util::dist between its endpoints.

fn angle(&self) -> f64

The interior angle between the previous half-edge and this half-edge.

The sum of the angles of all outgoing half-edges at a vertex should be 2 π.

If both this edge, and the previous edge, are geodesics, the angle is equivalent to util::angle where the b vertex is given by self.start().

fn inside(&self) -> Self::Face

Gets the Face whose interior boundary contains this half-edge.

fn start(&self) -> Self::Vertex

Gets the Vertex at the “start” of this half-edge.

fn complement(&self) -> Self

Gets the complementary half-edge on the opposite side of the edge.

The returned half-edge will go in the opposite direction along the same edge.

fn prev(&self) -> Self

Gets the half-edge which shares the inside face of this half-edge and precedes it in counter-clockwise order around the face.

fn next(&self) -> Self

Gets the half-edge which shares the inside face of this half-edge and follows it in counter-clockwise order around the face.

Provided Methods

fn side_index(&self) -> usize

The index of this half-edge within the Face::sides list of its inside.

fn outgoing_index(&self) -> usize

The index of this half-edge within the Vertex::outgoings list of its start.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl HalfEdge for subsphere::basetri::HalfEdge

type Face = Face

type Vertex = Vertex

impl<Proj: Eq + Clone + BaseTriProjector> HalfEdge for subsphere::hex::HalfEdge<Proj>

type Face = Face<Proj>

type Vertex = Vertex<Proj>

impl<Proj: Eq + Clone + BaseTriProjector> HalfEdge for subsphere::tri::HalfEdge<Proj>

type Vertex = Vertex<Proj>

type Face = Face<Proj>