Reference to the current point updating the camera modification.
Reference to the initial point starting the camera modification.
Copy of a camera for ongoing camera modifications based on previous/initial camera settings.
Current rotation matrix.
The camera that is to be modified in response to various events.
Initiate a new camera modification at a specific event position.
Position of the current event to start the modification at.
Actually applies the trackball rotation to the given camera.
Math for camera modification based on the first person metaphor.