Calculates the 2D Catmull–Rom spline for a chain of points and returns the combined curve.
For more details, see CatmullRom2.
The List of 2D points where CatmullRom2 is applied in groups of 4.
The tension of the curve. Use 0.0 for the uniform spline, 0.5 for the centripetal spline, 1.0 for the chordal spline.
Whether or not to connect the first and last point so it forms a closed shape.