XCGame: Extracted createBoxModel() method
XCGame: Extracted material variable in createBoxModel() method
XCGame: Replaced box with animated glider
XCGame: Adjust camera position and attitude
XCGame: Extracted createCamera() method
XCGame: Extracted createCameraController() method
XCGame: Converted createCamera/CameraController() to static methods

... with return value
XCGame: Adjusted rotation
XCGame: Extracted createEnvironment() method
XCGame: Adjusted lighting
XCGame: Fixed normal calculation