Struct Offset2d 

pub struct Offset2d { /* private fields */ }

A planar curve displaced a constant signed distance along its basis’s left normal (the tangent turned a quarter left), sharing the basis’s parameterization.

Point and first derivative are exact from the basis’s first and second derivatives. The second would need the basis’s third, which the vocabulary does not carry, so d2_at refuses by name. Where the basis’s tangent vanishes the offset direction is undefined and evaluation refuses.

Implementations

impl Offset2d

pub fn new(basis: PlanarCurve, distance: f64) -> OgeomResult<Self>

Offset basis by a signed distance along its left normal.

Errors

OgeomError::Construction if the distance is not finite and non-zero.

pub const fn basis(&self) -> &PlanarCurve

The curve being offset.

pub const fn distance(&self) -> f64

The signed displacement along the left normal.

Trait Implementations

impl Clone for Offset2d

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Curve2d for Offset2d

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 Offset2d

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

Formats the value using the given formatter.

impl PartialEq for Offset2d

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Offset2d