I stumbled upon an old post that addresses an issue I have been struggling with. I am quaternion challenged, so it is difficult to figure out how to incorporate this feature into a third-party quaternion-based camera that I'm using.
The camera appears to perform both quaternion rotations and camera positioning separately. Using Emergent's pseudocode, I think I have the positioning working correctly, but I won't know for sure until I get the rotations fixed.
The rotation portion uses mouse movement/keyboard input to rotate the camera. I'm guessing that's were I need to put the vector portions from the article over to this code, but it ain't going well. I guess it makes sense to commingle mouse movements with object alignment, I just don't know how to do that.
I can supply additional details, just let me know what they are. I would really appreciate any assistance anyone can give me.