calculateBorders clone DxfSolid DxfSolid DxfSolid getCorner m_Corner move rotate setCorner shapeArrow writeDxf ~DxfSolid

clone() virtual DxfEntity * clone ( ) overridevirtual 纯虚函数, 拷贝对象 实现了 DxfEntity. 被 Dxf3DFace 重载.