addControlPoint addToKnotsLists calculateBorders clone DxfSpline DxfSpline getControlPoints getControlPointSize getControlPointWeight getDegree getKnotsLists isClosed m_Closed m_ControlPoints m_Degree m_KnotsLists m_Weights move rotate setCloseStatus setControlPoints setControlPointWeight setDegree setKnots writeDxf ~DxfSpline

calculateBorders() virtual void calculateBorders ( ) overridevirtual 计算坐标范围 重载 DxfEntityContainer .