http://forums.xna.com/forums/27.aspxenCommunityServer 2007.1 (Build: 0.0)http://forums.xna.com/forums/thread/194554.aspxMon, 29 Jun 2009 15:07:00 GMT4aa5dbf6-357b-46b2-b5b2-1b660a6dc370:194554legalize0http://forums.xna.com/forums/thread/194554.aspxhttp://forums.xna.com/forums/commentrss.aspx?SectionID=27&PostID=194554There&#39;s a gazillion explanations of quaternions out there on the net.  Use google.http://forums.xna.com/forums/thread/187974.aspxWed, 10 Jun 2009 06:04:07 GMT4aa5dbf6-357b-46b2-b5b2-1b660a6dc370:187974Rajeev Khatri0http://forums.xna.com/forums/thread/187974.aspxhttp://forums.xna.com/forums/commentrss.aspx?SectionID=27&PostID=187974<br /> Hi All<br /> <br /> I am using DirectX 9 with C# dot Net. Can anyone tell me how to make <span style="text-decoration:underline;"><strong>Quaternion rotation</strong></span>. I am making a sample application. i am uploading this application with the code. Here is the link for the application given below. In this application, I am facing gimbal lock problem. I know the solution for gimbal lock problem is Quaternion. but i dont have a knowledge of Quaternion. how to make Quaternion rotation in DirectX 9 with C#.net. I have got some application regarding Quaternion rotation but this has explained in XNA and i am using DirectX 9.<br /> <br /> <br /> <a href="http://www.panindiagroup.com/Creating%203D%20Cube.rar" target="_blank" title="Sample application Code">http://www.panindiagroup.com/Creating%203D%20Cube.rar</a><br /> <br /> Please help<br /> <br /> Thanks and Regards <br /> <br /> Rajeev Khatri<br />