XNA Oriented Bounding Box Intersection Test

This project contains an Oriented Bounding Box (OBB) class and implements an intersection test with another OBB.

This intersection test is vital to implementing a collision detection system's broad phase (elimination) & will eventually be a part of a per-triangle collision detection system.

Usage:

- Cursor key moves one of the box around
- Z / C rotates the box in the Z-Axis

Requirements:

- XNA / Game Studio Express
- Visual C# Express

* If you got XNA installed, you can just run the included .EXE (in the bin\x86\Debug folder)

* This project implements Stefan Gottschalk's Separating Axis Theorem, covered by this thesis here:

   Collision Queries using Oriented Bounding Boxes

   http://www.cs.unc.edu/~geom/theses/gottschalk/main.pdf

and borrowed much from the ColDet collision library at:

   http://sourceforge.net/projects/coldet

This is a well done example, I hope you don't mind if my students post some questions to you?  I am an adjunct instructor in game design at CSU Fullerton (Cal State), and this fits in with the class exactly. 

SoCal Sam wrote:

This is a well done example, I hope you don't mind if my students post some questions to you?  I am an adjunct instructor in game design at CSU Fullerton (Cal State), and this fits in with the class exactly. 

I'm glad you can use it in your class. I'm happy to try to answer any questions your class may have, as long as it doesn't involve math Math is hard! I simply implemented Stefan algorithm as he describes in his thesis. I don't really understand it all.

But if you've got any question about the source code, I'll be happy to try

Oh, and stay tune for an update to this sample. For better "explorability"

Nice Work

I've been meaning to translate my C++ OBB code to XNA.

I used the book "Dynamic Simulations of Multibody Systems" to come up with the algorithm.

Ziggy

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