Enum Curve2

#[non_exhaustive]
pub enum Curve2 {
    Line(Line2),
    Circle(Circle2),
    Ellipse(Ellipse2),
    Polyline(Polyline2),
    BSpline(BSplineCurve2),
    Intrinsic(Intrinsic2),
    Sinusoid(Sinusoid2),
    QuadraticGraph(QuadraticGraph2),
    AngleGraph(AngleGraph2),
    Implicit(ImplicitCurve2),
    Lifted(LiftedCurve2),
}

Atomic two-dimensional curve values.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Line(Line2)

Infinite line.

Circle(Circle2)

Circle.

Ellipse(Ellipse2)

Ellipse.

Polyline(Polyline2)

Piecewise linear curve.

BSpline(BSplineCurve2)

Polynomial or rational B-spline.

Intrinsic(Intrinsic2)

Curve given by its natural equation: curvature as a function of arc length, anchored to a start frame. Carries clothoid and other transition spirals exactly, which no parametric variant can.

Sinusoid(Sinusoid2)

The graph v = mean + a cos(t) + b sin(t): the exact pcurve of a plane’s cut across a cylinder, read in the cylinder’s (angle, height) parameters. See Sinusoid2 (ADR 0071).

QuadraticGraph(QuadraticGraph2)

One root of a(t) v^2 + b(t) v + c(t) = 0 as a graph over t: the exact pcurve of a quadric’s cut across a cylinder or cone. See QuadraticGraph2 (ADR 0076).

AngleGraph(AngleGraph2)

A solution of a(t) cos u + b(t) sin u = c(t) as u over t: the exact pcurve of a plane’s or sphere’s cut across a torus. See AngleGraph2 (ADR 0076).

Implicit(ImplicitCurve2)

A stretch of a field’s zero set, the field being another analytic surface’s equation read in this surface’s parameters: the exact pcurve of any section between planes, quadrics and tori. See ImplicitCurve2 (ADR 0077).

Lifted(LiftedCurve2)

A space curve read in an analytic surface’s parameters, sharing the curve’s parameter: the pcurve of a B-spline’s section on the analytic face it meets. See LiftedCurve2 (ADR 0077).

Trait Implementations

impl Clone for Curve2

fn clone(&self) -> Curve2

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Curve2

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

Formats the value using the given formatter.

impl PartialEq for Curve2

fn eq(&self, other: &Curve2) -> 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 Curve2