void testDubin()
    {
        Circle c1       = new Circle(-5.0F, 0, 2);
        Circle c2       = new Circle(5.0F, 0, 2);
        var    tangents = DubinUtils.TangentLines(c1, c2);

        Debug.Log(tangents.Count);
        Circle c3 = new Circle(-5.0F, 0, 5);
        Circle c4 = new Circle(5.0F, 0, 5);

        tangents = DubinUtils.TangentLines(c3, c4);
        Debug.Log(tangents.Count);
    }
 private DubinInput dubinInput(DubinNode near, DubinNode target)
 {
     return(DubinUtils.DubinSP(new DubinState(near), new DubinState(target), true));
 }