Math for camera modification based on the first person metaphor.
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.
Update the ... .r.t. a specific event position.
Position of the current event used to update the yaw and pitch.
Actually applies the trackball rotation to the given camera.