Shows how to use the
Combinable interface and the
ShapeCombiner class to combine WorldWind surface shapes into a complex set of
contours by using boolean operations.
This example creates two static SurfaceCircle instances that partially overlap and displays them in a layer named
"Original". A ShapeCombiner is used to combine the two surface circles into a potentially complex set of contours
using boolean operations. Three examples of such operations are given: union, intersection and difference. The result
of each operation is displayed in a separate layer beneath the original shapes.