kurbo

Trait ParamCurveDeriv

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pub trait ParamCurveDeriv {
    type DerivResult: ParamCurve;

    // Required method
    fn deriv(&self) -> Self::DerivResult;

    // Provided method
    fn gauss_arclen(&self, coeffs: &[(f64, f64)]) -> f64 { ... }
}
Expand description

A differentiable parametrized curve.

Required Associated Types§

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type DerivResult: ParamCurve

The parametric curve obtained by taking the derivative of this one.

Required Methods§

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fn deriv(&self) -> Self::DerivResult

The derivative of the curve.

Note that the type of the return value is somewhat inaccurate, as the derivative of a curve (mapping of param to point) is a mapping of param to vector. We choose to accept this rather than have a more complex type scheme.

Provided Methods§

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fn gauss_arclen(&self, coeffs: &[(f64, f64)]) -> f64

Estimate arclength using Gaussian quadrature.

The coefficients are assumed to cover the range (-1..1), which is traditional.

Implementors§