public void WristPointingUp()
                    {
                        Point3 wrist = new Point3(10, 11, 9);
                        double roll  = InverseKinematics.GetShoulderRollRight(neckToSpine, shoulderL, shoulderR, elbow, wrist);

                        Assert.AreEqual(90, roll, angleTolerance);
                    }
                    public void Inline()
                    {
                        Point3 wrist = new Point3(10, 10, 8);
                        double roll  = InverseKinematics.GetShoulderRollRight(neckToSpine, shoulderL, shoulderR, elbow, wrist);

                        Assert.AreEqual(0, roll);
                    }