Struct Triangle

pub struct Triangle {
    pub a: u32,
    pub b: u32,
    pub c: u32,
    pub ab_edge: usize,
    pub bc_edge: usize,
    pub ca_edge: usize,
    /* private fields */
}

A main triangle on the base shape of a subdivided shape.

Main triangles are those which are part of the definition of the base shape, rather than created by subdivision.

The specification of the library expects a, b, and c to be in a counter-clockwise winding.

Fields

a: u32

b: u32

c: u32

ab_edge: usize

bc_edge: usize

ca_edge: usize

Implementations

impl Triangle

pub const fn new( a: u32, b: u32, c: u32, ab_edge: usize, bc_edge: usize, ca_edge: usize, ) -> Self

Creates a new Triangle given the necessary data.

• The fields a, b, and c are the indices into BaseShape::initial_points() which are the vertices of this triangle. Note that this crate assumes points are in a counter-clockwise ordering.

• The fields ab_edge, bc_edge, ca_edge mark the index of the edge which a/b, b/c, and c/a border respectively. While theoretically you could give each triangle its own edge, sharing edges between triangles saves on memory footprint and performance.

  There is no explicit list of edges; they are defined by how they are used here. However, the total number of edges must be specified in BaseShape::EDGES, and all edge indices from 0 to EDGES - 1 must be used.

Trait Implementations

impl Clone for Triangle

fn clone(&self) -> Triangle

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Triangle

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

Formats the value using the given formatter.

impl Default for Triangle

fn default() -> Self

Returns the “default value” for a type.