Struct lyon::bezier::CubicBezierSegment
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[src]
pub struct CubicBezierSegment {
pub from: TypedPoint2D<f32, UnknownUnit>,
pub ctrl1: TypedPoint2D<f32, UnknownUnit>,
pub ctrl2: TypedPoint2D<f32, UnknownUnit>,
pub to: TypedPoint2D<f32, UnknownUnit>,
}A 2d curve segment defined by four points: the beginning of the segment, two control points and the end of the segment.
The curve is defined by equation:²
∀ t ∈ [0..1], P(t) = (1 - t)³ * from + 3 * (1 - t)² * t * ctrl1 + 3 * t² * (1 - t) * ctrl2 + t³ * to
Fields
from: TypedPoint2D<f32, UnknownUnit>
ctrl1: TypedPoint2D<f32, UnknownUnit>
ctrl2: TypedPoint2D<f32, UnknownUnit>
to: TypedPoint2D<f32, UnknownUnit>
Methods
impl CubicBezierSegment
fn sample(&self, t: f32) -> TypedPoint2D<f32, UnknownUnit>
Sample the curve at t (expecting t between 0 and 1).
fn split(&self, t: f32) -> (CubicBezierSegment, CubicBezierSegment)
Split this curve into two sub-curves.
fn before_split(&self, t: f32) -> CubicBezierSegment
Return the curve before the split point.
fn after_split(&self, t: f32) -> CubicBezierSegment
Return the curve after the split point.
fn flattening_iter(&self, tolerance: f32) -> CubicFlatteningIter
Returns the flattened representation of the curve as an iterator, starting after the current point.
fn flattened_for_each<F>(&self, tolerance: f32, call_back: &mut F) where F: FnMut(TypedPoint2D<f32, UnknownUnit>) -> ()
Iterates through the curve invoking a callback at each point.