pub fn join<P: Blend>(a: &Spline<P>, b: &Spline<P>) -> OgeomResult<Spline<P>>Expand description
Join two clamped B-splines of one degree end to start into one.
a’s last control point and b’s first are taken to be the same
point (the caller checks, since a control point is whatever blends)
and become one control; the join knot is left at multiplicity degree,
so the curve passes through it and continues with b’s parameter
shifted to begin where a’s ends. The domain is the two domains laid
end to end.
§Errors
OgeomError::Construction if the
degrees differ, either knot vector is not clamped, or a knot vector does
not fit its control points.