Ring

This creates a closed path in the shape of a ring in the XZ plane with the Y axis in the centre. There are 2 constructors depending on whether you want a circular or elliptical path.

circular path elliptical path

Creating the Ring path

Constructors 
Ring(float radius, int nbrSlices)
Ring(float radiusX, float radiusZ, int nbrSlices)
Parameter Comments 
radius
 the ring radius round the Y axis. This will create a circular path. 
radiusX, radiusZ
 the ring radius along the X and Z axis. If they differ an elliptical path will be created. 
nbrSlices
 the number of slices along the length of the path