How can I rotate (in game,) with click-drag rather than keyboard keys? I've made a game where I rotate an object, (the entire scene actually, as everything is parented to one central empty,) using the arrow keys, but I'd rather like it to rotate with click-drag. At the same time, I'm using the left mouse button to select objects and move them around.
Generally it's nicer to rotate the camera around the object, but the logic brick setup is the same:



If you want to rotate the camera, put an empty at the rotation center, apply the logic to the empty, and parent the camera to the empty.