I want to learn how I can use the bounding sphere for my project. Can anyone show me the way? I find a site www.mvps.org, and take its bounding sphere algorithm, but I''ve had errors. pls send me sample codes including collision. I am also looking for sites on the net. Thanks....

http://photoneffect.com/coldet/ has a free collision detection library you can use in your work -- source is available as well. http://www.codesampler.com/oglsrc.htm appears to provide an excelent tutorial/example, and judging by the screenshot, gives a good visual of the technique. Check out Game Programming Gems (book) when you can afford it. Also, search "bounding sphere collision" and try your luck.

Thanks my friend.

How can I make Boundingsphere tree? I calculated BS radius and center of my object, using D3DXComputeBoundingSphere. But I want to subdivide BS into smaller parts for collision detection to done better.

Show me the way,pls.

Thanks.