Struct Arc 

pub struct Arc<S: Scalar> {
    pub circle: Circle<S>,
    pub start: Vector3<S>,
    pub end: Vector3<S>,
}

A circular arc: the part of circle from start counter-clockwise (seen with circle.normal towards the viewer) to end — all of it when start and end coincide.

Fields

circle: Circle<S>

start: Vector3<S>

end: Vector3<S>

Implementations

impl<S: Scalar> Arc<S>

pub fn could_be_closed(&self) -> bool

Whether the arc could be the whole circle.

pub fn sweep(&self) -> f64

The angle the arc turns through, in radians, in (0, 2 pi].

A plain f64: Scalar has no inverse trigonometry, and this is only ever used to choose a point along the arc (see Arc::point_at).

pub fn point_at(&self, fraction: f64) -> GeopResult<Vector3<S>>

The point fraction of the way along the arc, by angle: start at 0, end at 1.

The angle is computed in f64 (see Arc::sweep) and taken as sharp — legitimately: which point is “0.3 of the way” is a choice the caller makes, and any angle within rounding of it serves that choice equally well. What the result has to be honestly is a point on the circle, and it is, since it is built from the circle itself.

pub fn tangent_at(&self, p: &Vector3<S>) -> GeopResult<Vector3<S>>

The unit tangent at p, a point of the arc, pointing the way the arc runs.

Trait Implementations

impl<S: Clone + Scalar> Clone for Arc<S>

fn clone(&self) -> Arc<S>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<S: Debug + Scalar> Debug for Arc<S>

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

Formats the value using the given formatter.