public void ToCoefficients(ref Matrix2d A, ref Vector2D B, ref double C) { Vector2D ratio0 = Axis0 / Extent[0]; Vector2D ratio1 = Axis1 / Extent[1]; A = new Matrix2d(ratio0, ratio0) + new Matrix2d(ratio1, ratio1); B = ((double)-2) * (A * Center); C = A.QForm(Center, Center) - (double)1; }