This Octtree project uses XNA Game Studio version 1.0.
Download the current release for source code
Current Progress
The current implementation is a "loose" octtree in that each nodes size (cube) is noted by a fixed size (sector size) and a floating size (size with all models/components included). This compensates for large objects or objects close to a border of an octtree node to be drawn when the actual fixed size indicates the node is "off screen" or "out of view" but an object that it contains has a portion within the viewing frustum.
The XNA Game Studio Solution contains a test game project to give an example of how to use it.
The capablilties of the occtree will be similar to that of my Quadtree project at http://www.codeplex.com/quadtreeload.
Current Screen Shots