CatmullRom

The direction of the Catmull-Rom spline through the points, with knot spacing |Δp|^alpha: 0.0 is uniform, 0.5 centripetal and 1.0 chordal. At the ends of an open polyline the tangent is that of the next point mirrored in the end edge, so the end edges are single arcs. Usually loops less than Circle on scattered points.