The camera tag defines a single camera to view the scene. The camera may remain stationary or be moved about based on the actions of its parent tags. Multiple cameras may be defined to provide different views of the scene. It is generally not required to have more than one camera of each type as a camera can be moved to any position in the scene. The first camera defined is the active camera. Sending an event (of any kind) to the setactive attribute causes that camera to become active and all other cameras are deactivated.