class AreaOfInterest extends GraphicalContext<BorderPane> {

    static int orientation(final Point2D p1, final Point2D p2, final Point2D p3) {

        final int val = (int) ((p2.getY() - p1.getY()) * (p3.getX() - p2.getX())
            - (p2.getX() - p1.getX()) * (p3.getY() - p2.getY()));

        if (val == 0) {
            return 0;
        }

        return (val > 0) ? 1 : -1;
    }

    public  AreaOfInterest(final GazePlay gazePlay, final Stats stats);

}