calculateBorders clone DxfEntity getArrowSize getAttribute getBulge getDimensionLineColor getDimensionLineGap getDimensionLineWidth getEndPoint getEntityId getEntityLayoutId getEntityUuid getExtensionLineColor getExtensionLineExtension getExtensionLineOffset getExtensionLineWidth getFixedLength getFixedLengthOn getGeneralFactor getGeneralScale getInsideHorizontalText getMaxVector getMiddlePoint getMinVector getSize getStartPoint getTextColor getTextHeight getTextStyle getTickSize getType m_Attribute m_EntityId m_EntityParentId m_EntityUuid m_Header m_MaxV m_MinV m_Type m_Version move resetBorders rotate setAttribute setAttribute setEntityLayoutId setHeaderInfo setLayer setLayer setVersion writeDxf ~DxfEntity

getMiddlePoint() virtual DxfVector getMiddlePoint ( ) const virtual 中心点坐标 被 DxfLine, DxfArc , 以及 DxfEllipse 重载.