Struct CurvePoint 

pub struct CurvePoint {
    pub point: Point,
    pub d1: Vector,
    pub d2: Vector,
}

A point on a curve with its first two derivatives.

Fields

point: Point

The position.

d1: Vector

First derivative with respect to the parameter.

d2: Vector

Second derivative.

Implementations

impl CurvePoint

pub fn tangent(&self, tol: Tolerances) -> OgeomResult<Direction>

The unit tangent.

Errors

OgeomError::Construction at a cusp, where the first derivative vanishes and there is no tangent direction.

pub fn curvature(&self) -> f64

The curvature.

|d1 x d2| / |d1|^3. Zero on a straight section, and the reciprocal of the radius on a circle.

Trait Implementations

impl Clone for CurvePoint

fn clone(&self) -> CurvePoint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CurvePoint

impl Debug for CurvePoint

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

Formats the value using the given formatter.

impl PartialEq for CurvePoint

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