The following example demonstrates creating arc links that are restricted to shallow regions of the model.
In this example circular arc links are created in areas where the surface slope at either end of the link does not reach a value greater than 20 degrees. Since no constraints were applied to the 2nd choice link, any links that are created in areas where the surface slope is greater than 20 degrees are created as 2nd choice links, unless they gouge, in which case they are created as Default links.