将鼠标拖动动作转换为对象的3d旋转的最佳方法

I have a 3d object that I wish to be able to rotate around in 3d. The easiest way is to directly translate X and Y mouse motion to rotation about the Y and X axes, but if there is some rotation along both axes, the way the model rotates becomes highly counterintuitive (i.e. if you flip the object 180 degrees about one axis, your motion along the other axis is reversed).I have a 3d object that I wish to be able to ro