Added methods to sector that compute the intersection of a list of sectors, and determine whether a sector intersects any sector in a list of sectors.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2397 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added a GLU tessellator callback implementation to GLUTessellatorSupport that recursively sends tessellation results to another GLU tessellator. Added the ClippingTessellator utility class, which simplifies polygon vertices outside a region of interest.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2398 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Update to RadarVolume and its corresponding example.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2399 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Documented RadarVolume and its corresponding example.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2400 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added RadarVolume outline.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2401 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Modified RadarVolume to work in 2D. Modified its example to view the volume at startup.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2402 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added display of wait cursor while radar volume example calculates intersections.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2403 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Corrected error message in RadarVolume.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2404 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Initial checking of Combinable interface and supporting classes.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2405 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Modified surface shapes and ShapefilePolygons to implement the Combinable interface.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2406 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added a shapefile containing polygons of the world's land features at testData/shapefiles/ne_10m_land.shp.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2407 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Corrected the shapefile path in config/Earth/WorldBordersShapefile.xml.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2408 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added the class SurfaceMultiPolygon, a surface shape polygon that supports multiple inner and outer boundaries.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2409 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added examples that demonstrate usage of the Combinable interface with surface shapes and shapefiles.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2410 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added documentation to Combinable, CombineContext, ShapeClipping and ShapeCombining.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2411 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Modified CombineContext to normalize geographic coordinates computed as a result of combining shapes.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2412 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Modified ShapeCombiner's implementation of the intersection and difference operations to correctly handle the case where shapes do not overlap.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2413 822214bb-dcf7-4c8d-a767-17ae0fb20d88
Added support for conical radar volumes to RadarVolume. Added computation of conical volume in RadarVolumeExample. Repaired floor flickering.

git-svn-id: http://worldwind31.arc.nasa.gov/svn/trunk@2414 822214bb-dcf7-4c8d-a767-17ae0fb20d88