Function fit_points_joint_winding 

pub fn fit_points_joint_winding(
    points: &[Point],
    on_a: &[Point2],
    on_b: &[Point2],
    degree: usize,
    tolerance: f64,
    tol: Tolerances,
) -> OgeomResult<(Fitted<BSplineCurve>, BSpline2d, BSpline2d)>

As fit_points_joint_closed, for a loop closed in space whose pcurves may end a whole period from where they began: a section winding once round a periodic surface. The join is C1 in every coordinate, which is right where the chart runs at one speed across its seam, as a periodic surface’s does. A patch that merely meets itself need not.

Errors

As fit_points_joint.