Struct HermiteCurve 

pub struct HermiteCurve {
    pub points: Vec<[f64; 3]>,
    pub tangents: Vec<[f64; 3]>,
}

A piecewise cubic Hermite spline interpolating through control points with user-supplied tangent vectors at each knot.

Guarantees C0 continuity at joints; C1 continuity if tangents are chosen consistently (e.g., Catmull–Rom style).

Fields

points: Vec<[f64; 3]>

Interpolation knots (positions).

tangents: Vec<[f64; 3]>

Tangent vectors at each knot, matching points in length.

Implementations

impl HermiteCurve

pub fn new(points: Vec<[f64; 3]>, tangents: Vec<[f64; 3]>) -> Self

Construct a Hermite spline from points and tangents.

Panics

Panics if points.len() != tangents.len() or fewer than 2 points.

pub fn eval(&self, t: f64) -> [f64; 3]

Evaluate the spline at a global parameter t ∈ [0, n_segments].

The integer part selects the segment; the fractional part is the local Hermite parameter.

pub fn derivative(&self, t: f64) -> [f64; 3]

Derivative of the spline at global parameter t.