pub fn starting_near(
chain: Chain<NurbCurve3D>,
centre: &[f64; 3],
) -> GeopResult<Chain<NurbCurve3D>>Expand description
chain starting where it comes nearest to centre: an open one at its
nearer end, a closed one at its nearest joint. Which is a free choice of
where to start; the nearest is what the profile is drawn at.