Struct ArcVertex

pub struct ArcVertex {
    pub point: DVec2,
    pub bulge: f64,
}

One boundary vertex and the bulge of the edge leaving it.

The bulge describes the edge from this vertex to the NEXT one, so a ring of n vertices has exactly n edges and needs no separate edge list. Storing it per departing vertex keeps insertion and reversal local operations rather than re-indexing an edge array.

Fields

point: DVec2

Vertex position.

bulge: f64

tan(theta / 4) for the edge leaving point; 0 means straight.

Implementations

impl ArcVertex

pub const fn straight(point: DVec2) -> ArcVertex

A vertex whose departing edge is a straight segment.

pub const fn bulged(point: DVec2, bulge: f64) -> ArcVertex

A vertex whose departing edge bulges by bulge.

pub fn is_straight(&self) -> bool

True when the departing edge is straight.

Exact comparison is deliberate: a bulge is either exactly zero, in which case the edge IS a segment, or it is an arc whose radius is whatever the value implies. Treating tiny bulges as straight would silently discard curvature the caller asked for.

Trait Implementations

impl Clone for ArcVertex

fn clone(&self) -> ArcVertex

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ArcVertex

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

Formats the value using the given formatter.

impl PartialEq for ArcVertex

fn eq(&self, other: &ArcVertex) -> 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 Copy for ArcVertex

impl StructuralPartialEq for ArcVertex