PixelGeoDC2::GeoPixelLadderStruct Node1 PixelGeoDC2::GeoPixelLadder Struct + Build() + GeoVPixelFactory() Node2 PixelGeoDC2::GeoVPixelFactory # m_gmt_mgr # m_mat_mgr # m_DDmgr # m_epsilon + GeoVPixelFactory() + ~GeoVPixelFactory() + Build() Node2->Node1