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view frustum culling with proscene

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A basic view frustum culling implementation made with <a href="http://code.google.com/p/proscene/";>proscene</a> which was originally implemented by Gilles Debunne's <a href="http://www.libqglviewer.com">libQGLViewer</a>. A hierarchical octree structure is clipped against a camera's frustum clipping planes. A second viewer displays an external view of the scene that exhibits the clipping. This example requires <a href="http://github.com/acsmith/napplet";>napplet</a>. Press 'h' to toggle the mouse and keyboard navigation help.
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