OpenSim.Region.Framework.Scenes.SceneObjectPart.UpdateLookAt C# (CSharp) Method

        public void UpdateLookAt()
        {
            try
            {
                if (APIDTarget != Quaternion.Identity)
                {
                    if (Single.IsNaN(APIDTarget.W) == true)
                    {
                        APIDTarget = Quaternion.Identity;
                        return;
                    }
                    Quaternion rot = RotationOffset;
                    Quaternion dir = (rot - APIDTarget);
                    float speed = ((APIDStrength / APIDDamp) * (float)(Math.PI / 180.0f));
                    if (dir.Z > speed)
                    {
                        rot.Z -= speed;
                    }
                    if (dir.Z < -speed)
                    {
                        rot.Z += speed;
                    }
                    rot.Normalize();
                    UpdateRotation(rot);
                }
            }
            catch (Exception ex)
            {
                m_log.Error("[Physics] " + ex);
            }
        }