question: private void updateFromCamera ( ) { final ReadOnlyVector3 camLeft = camera . getLeft ( ) ; final ReadOnlyVector3 camUp = camera . getUp ( ) ; final ReadOnlyVector3 camDir = camera . getDirection ( ) ; final ReadOnlyVector3 camLoc = camera . getLocation ( ) ; final Matrix3 rotation = Matrix3 . fetchTempInstance ( ) ; rotation . fromAxes ( camLeft , camUp , camDir ) ; setRotation ( rotation ) ; setTranslation ( camLoc ) ; Matrix3 . releaseTempInstance ( rotation ) ; }
target:  Adapted from Ardor3D CameraNode.