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use na::RealField; use crate::math::{Point, Vector}; use crate::procedural::TriMesh; /// A sample point and its associated tangent. pub enum PathSample<N: RealField> { /// A point that starts a new path. StartPoint(Point<N>, Vector<N>), /// A point that is inside of the path currently generated. InnerPoint(Point<N>, Vector<N>), /// A point that ends the path currently generated. EndPoint(Point<N>, Vector<N>), /// Used when the sampler does not have any other points to generate. EndOfSample, } /// A curve sampler. pub trait CurveSampler<N: RealField> { /// Returns the next sample point. fn next(&mut self) -> PathSample<N>; } /// A pattern that is replicated along a path. /// /// It is responsible of the generation of the whole mesh. pub trait StrokePattern<N: RealField> { /// Generates the mesh using this pattern and the curve sampled by `sampler`. fn stroke<C: CurveSampler<N>>(&mut self, sampler: &mut C) -> TriMesh<N>; }