mt::Vector2 point(idesc.x, idesc.y);
   mt::Vector2 origin(m_fX, m_fY);
   mt::Vector2 scale(m_fHScale, m_fVScale == 0 ? m_fHScale : m_fVScale);
   mt::Vector2 hotSpot(m_fHotSpotX, m_fHotSpotY);

   mt::Matrix2D matInv = mt::Matrix2DTranslation(-origin)
     * mt::Matrix2DRotateDeg(-m_fAngle)
     * mt::Matrix2DScale(1.0f/scale.x, 1.0f/scale.y)
     * mt::Matrix2DTranslation(hotSpot);
   mt::Vector2 trPos = point * matInv;
   trPos = trPos + mt::Vector2(m_fTX, m_fTY);