AnalyticalGraphicsInc/cesium — pull request #150 by bagnell (2012-08-08 21:28:29+00:00)
Title: Frustum Culling

Compute bounding spheres in 3D/Columbus view and bounding rectangles in 2D for all primitives. The `CompositePrimitive` and `SensorVolumeCollection` culls primitives whose bounding sphere/rectangle does not intersect the view frustum.