for (int i = 0; i < nGestures; i++) {
gestureArray[i] = new TailGesture(app.width, app.height);
}
clearTails();
this.registerInputProcessor(new MultipleDragProcessor(app));
this.addGestureListener(MultipleDragProcessor.class, new DragListener());
Vector3D norm = new Vector3D(0,0,1);
Vector3D pointInPlane = new Vector3D(0,0,0);
plane = new Plane(pointInPlane, norm);