Struct Constraint

pub struct Constraint {
    pub a: u32,
    pub b: u32,
}

A constraint edge, as indices into the input point slice.

Held as a pair rather than as two points so the caller’s vertex identity survives the triangulation: a consumer that knows “edge 3 was my window head” can still find it in the output.

Fields

a: u32

Index of the first endpoint.

b: u32

Index of the second endpoint.

Implementations

impl Constraint

pub fn new(a: u32, b: u32) -> Self

Construct a constraint between two vertex indices.

Endpoints are stored in ascending order so that (a, b) and (b, a) are the same constraint. An undirected edge compared directionally is a classic source of “constraint lost” bugs that only appear when the caller happens to list an edge the other way round.

Trait Implementations

impl Clone for Constraint

fn clone(&self) -> Constraint

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Constraint

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

Formats the value using the given formatter.

impl Ord for Constraint

fn cmp(&self, other: &Constraint) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Constraint

fn eq(&self, other: &Constraint) -> 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 PartialOrd for Constraint

fn partial_cmp(&self, other: &Constraint) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Constraint

impl Eq for Constraint

impl StructuralPartialEq for Constraint