Spline Class (#1817) General purpose spline class for 3D. Uses a composite 3D cubic Bezier curve under the hood. Shape and behavior of the spline are controlled through points and handles. Two consecutive points and their handles define one segment/curve of the spline. The spline can be turned into a loop (Beziergon), which combined with linear handles can also be used to create a polygon. Splines are useful for animations, camera movements, marking areas, or procedural geometry generation.