bool CSceneNodeAnimatorCameraTrackball::OnEvent(const irr::SEvent& event)
{
    plog->Write("Event On");

    if(event.EventType == irr::EET_MOUSE_INPUT_EVENT)
    {
        plog->Write("Mouse IN");
        switch(event.MouseInput.Event)
        {
        case irr::EMIE_LMOUSE_PRESSED_DOWN:
            {
                plog->Write("LMOUSE Down");
                this->m_isPressed = true;
                return true;
            }
        case irr::EMIE_LMOUSE_LEFT_UP:
            {
                plog->Write("LMOUSE Left");
                this->m_isPressed = false;
                return true;
            }
        case irr::EMIE_MOUSE_WHEEL:
            {
                plog->Write("MOUSE Wheel");
                if ( event.MouseInput.Wheel > 0 )
                    {
                        m_radius -= 1.0f * m_moveSpeed;
                    }
                else
                    {
                        m_radius += 1.0f * m_moveSpeed;
                    }
                this->m_wheel = true;
                return true;
            }
        case irr::EMIE_MOUSE_MOVED:
            {
                if (this->m_isPressed == false)
                {
                    this->m_cursorPos = this->m_cursorControl->getRelativePosition();
                    return true;
                }
                    // if the left button is pressed, then we get the change and
                    // set the rotation vector. And update the position
                else if (this->m_isPressed == true)
                {
                    m_cursorMove = m_cursorControl->getRelativePosition() - m_cursorPos;
                    m_rotation.X += m_cursorMove.X * m_rotateSpeed;
                    m_rotation.Y += m_cursorMove.Y * m_rotateSpeed;
                        // check the Y change to prevent vertical looping
                    if (m_rotation.Y >= MAXANGLE) { m_rotation.Y = MAXANGLE; }
                    else if (m_rotation.Y <= -MAXANGLE) { m_rotation.Y = -MAXANGLE; }
                    m_cursorPos = m_cursorControl->getRelativePosition();
                    return true;
                }
            }
        }
    }
    plog->Write("Event End");
    return false;   // event not proceeded
}