I have a quaternion based camera class (which controls a view matrix) and would like a function to rotate the camera to face a specified point. The best approach I can come up with is that I rotate the camera on the plane of the two vector by the angle between them.
Any advice?
Any decent OpenGL math library should have a function called lookAt. It does exactly what you want with the exception that it produces a matrix and not a quaternion. This problem can be solved by converting the matrix back to a quaternion.
In case you aren't already using a math library, I recommend checking glm which basically tries to provide everything that GLSL has, just in C++.
