Split Ring

This option allows the user to create a split ring, that is, a ring surface that is open at two opposite points. The parameters that need to be supplied by the user are:

The center point of the ring.
The minor (inner) and major (outer) radius, as in the previous geometries.
The opening angle, in degrees, that determines how large the openings are. Both openings are created the same size.
The opening direction, in degrees, that determines how the openings are oriented. An opening direction of 0 degrees means that the openings will be oriented in the direction of the Y axis. Larger angles are interpreted as a counter-clockwise rotation.