Struct RationalBezierSpan2 

pub struct RationalBezierSpan2 { /* private fields */ }

One exact rational Bezier span extracted from a retained NURBS curve.

control_points and weights have length degree + 1. The endpoint knot values are retained with the span so downstream code can keep the source parameter interval attached to the Bezier evidence.

Implementations

impl RationalBezierSpan2

pub const fn degree(&self) -> usize

Returns the Bezier degree.

pub fn control_points(&self) -> &[Point2]

Returns exact affine control points for this retained rational span.

pub fn weights(&self) -> &[Real]

Returns exact homogeneous weights for this retained rational span.

pub fn knot_interval(&self) -> (&Real, &Real)

Returns the source knot interval covered by this Bezier span.

pub fn native_subcurve( &self, policy: &CurvePolicy, ) -> CurveResult<Classification<BezierSubcurve2>>

Converts this retained rational Bezier span into native topology when exact.

Degree-two spans map directly to RationalQuadraticBezier2. A degree-three rational span maps to CubicBezier2 only when all homogeneous weights are exactly equal, because the rational Bezier basis denominator is then the same common scale on the full parameter interval. Every other case stays unsupported retained evidence rather than leaking an approximate topology object.

pub fn native_topology_report( &self, span_index: usize, policy: &CurvePolicy, ) -> CurveResult<Classification<RationalBezierSpanTopologyReport2>>

Returns the exact native-topology status for this retained rational span.

Trait Implementations

impl Clone for RationalBezierSpan2

fn clone(&self) -> RationalBezierSpan2

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RationalBezierSpan2

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

Formats the value using the given formatter.

impl PartialEq for RationalBezierSpan2

fn eq(&self, other: &RationalBezierSpan2) -> 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 RationalBezierSpan2