public static void QuadCurveToPoint(this NSBezierPath path, CGPoint point1, CGPoint point2)
{
//TODO FIX THAT
//Any quadratic spline can be expressed as a cubic (where the cubic term is zero). The end points of the cubic will be the same as the quadratic's.
//CP0 = QP0
//CP3 = QP2
//The two control points for the cubic are:
//CP1 = QP0 + 2/3 *(QP1-QP0)
//CP2 = QP2 + 2/3 *(QP1-QP2)
//...There is a slight error introduced due to rounding, but it is unlikely to be noticeable.
var cp0 = point2.X;
var cp3 = point2.X;
var cp1 = point2.X + 2 / 3 * (point2.Y - point2.X);
var cp2 = point2.X + 2 / 3 * (point2.Y - point2.X);
path.RelativeCurveTo(point1, new CGPoint(cp0, cp1), new CGPoint(cp2, cp3));
}