Struct BSpline2d 

pub struct BSpline2d { /* private fields */ }

A B-spline in the plane, polynomial or rational.

Implementations

impl BSpline2d

pub fn new( knots: KnotVector, control: Vec<Point2>, tol: Tolerances, ) -> OgeomResult<Self>

A polynomial B-spline.

Errors

OgeomError::Dimension on a shape mismatch.

pub fn rational( knots: KnotVector, control: Vec<Weighted<Point2>>, ) -> OgeomResult<Self>

A rational B-spline.

Errors

OgeomError::Dimension on a shape mismatch.

pub const fn knots(&self) -> &KnotVector

The knot vector.

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

The weighted control points.

pub const fn is_rational(&self) -> bool

Whether the weights differ.

Trait Implementations

impl Clone for BSpline2d

fn clone(&self) -> BSpline2d

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Curve2d for BSpline2d

fn domain(&self) -> (f64, f64)

The parameter interval over which the curve is defined.

fn point_at(&self, u: f64, tol: Tolerances) -> OgeomResult<Point2>

The point at u.

fn d1_at(&self, u: f64, tol: Tolerances) -> OgeomResult<Vector2>

The first derivative at u.

fn derivatives_at( &self, u: f64, n: usize, tol: Tolerances, ) -> OgeomResult<Vec<Vector2>>

Derivatives up to order n, with result[0] the point itself.

fn kind(&self) -> CurveKind

What kind of curve this is.

fn is_closed(&self, tol: Tolerances) -> bool

Whether the curve’s ends meet.

fn is_periodic(&self) -> bool

Whether the curve continues past its domain by repeating.

fn start(&self, tol: Tolerances) -> OgeomResult<Point2>

The start point.

fn end(&self, tol: Tolerances) -> OgeomResult<Point2>

The end point.

impl Debug for BSpline2d

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

Formats the value using the given formatter.

impl From<BSpline2d> for PlanarCurve

fn from(c: BSpline2d) -> Self

Converts to this type from the input type.

impl PartialEq for BSpline2d

fn eq(&self, other: &BSpline2d) -> 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 BSpline2d