A simple example of a 2D Camera, where you can control the zoom, rotation and x&y coordinates of the camera, which in turn is used to calculate how the sprites appear. In this example, an invisible ball bounces around the real stage using "if on edge, bounce". Then, the camera and position of the invisible ball is used to calculate the appearance of the gray stage and the visible ball. See inside. Arrow keys, or click the edges of the stage, to scroll the camera. Variable monitors to change camera rotation and zoom. All code by me (@kriblo).
