Inverse camera axis


I was wondering if there is any way to inverse the user input that goes to the camera. I recreated the first person mode by setting the camera position and look-at-target to be the same, now if the user moves the camera, he won t orbit around the model, but he will rotate in place. I want this so when a user accesses the website from mobile, when he swipes right, the camera will move towards left(right now if you swipe right, the camera goes right, which is a bit counterintuitive on the phone).