Function fit_curve3 

pub fn fit_curve3(
    points: &[Point3],
    options: &CurveFitOptions,
) -> Result<CurveFit3, GeomError>

Fit a B-spline curve of options.degree through points by least squares, with options.control_point_count unknowns.

Errors

Refuses non-finite points, fewer than two points, an invalid degree, a control-point count outside degree + 1 ..= points.len(), coincident consecutive points under chord-length or centripetal parameterisation, a non-finite or negative smoothing weight, and a rank-deficient least-squares system (reported with the numeric rank and the rank required).