Struct OffsetCurve 

pub struct OffsetCurve { /* private fields */ }

A space curve displaced a constant signed distance perpendicular to a reference direction: the offset direction at t is the unit vector of tangent x reference, the classical spelling.

Point and first derivative are exact from the basis’s first two derivatives. The second would need the basis’s third, which the vocabulary does not carry, so derivatives_at beyond order one refuses by name. Where the tangent runs along the reference the offset direction is undefined and evaluation refuses.

Implementations

impl OffsetCurve

pub fn new( basis: Curve, distance: f64, reference: Direction, ) -> OgeomResult<Self>

Offset basis by distance along tangent x reference.

Errors

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

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

The curve being offset.

pub const fn distance(&self) -> f64

The signed displacement.

pub const fn reference(&self) -> Direction

The direction the offset plane is perpendicular to.

Trait Implementations

impl Clone for OffsetCurve

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Curve3d for OffsetCurve

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

The parameter interval over which the curve is defined.

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

The point at u.

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

The first derivative at u.

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

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

fn kind(&self) -> CurveKind

What kind of curve this is.

fn continuity(&self) -> Continuity

How smooth the curve is across its domain.

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 tangent_at(&self, u: f64, tol: Tolerances) -> OgeomResult<Direction>

The unit tangent at u.

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

The curvature at u.

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

The start point.

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

The end point.

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

Bring u into the domain, wrapping if the curve is periodic.

impl Debug for OffsetCurve

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

Formats the value using the given formatter.

impl PartialEq for OffsetCurve

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for OffsetCurve