I want to rotate a 3D scene In the way it should be using a trackball but using a mouse. I´m sure most of you know whats the gimbal lock problem. I´ve found some papers and a library but it´s not useful for me. Do you know where to find some information that can teach me the math basis of the problem and how to solve it?. I am trying to do it mapping the coordinates of the camera over a virtual sphere without the use of quats but It´s quite difficult. Where can I find a "stupids for" tutorial about this?..