i’ve got a question to arcball camera. As far as I understand
this topic, the mouse coordinates are captured. Then gluUnProject is used to create 3d coordinates.Then a vector
is created from these coordinates to the center point and a
second evector for the new point. Then with the cross product you can compute the rotation axis and the argument between these two vectors to create a quaternion for rotation.
But how do I get an eye point , the position from the camera ?