public void setDownRotateOnCloseViewOnly(boolean rotateOnlyWhenClose) {
        veryCloseRotation = rotateOnlyWhenClose;
    }
@param rotateOnlyWhenClose When this flag is set to false the chase
camera will always rotate around its spatial independently of their
distance to one another. If set to true, the chase camera will only
be allowed to rotated below the "horizon" when the distance is smaller
than minDistance + 1.0f (when fully zoomed-in).
jme3-core/src/main/java/com/jme3/input/ChaseCamera.java