bulge calculateBorders clone DxfArc getAngle1 getAngle2 getAngleLength getAnticlockwise getBulge getCenter getDirection1 getDirection2 getEndPoint getLength getMiddlePoint getRadius getStartPoint isReversed m_Angle1 m_Angle2 m_Anticlockwise m_CenterPoint m_MinRadius m_Radius m_Reversed move reverseAngle1AndAngle2 rotate setAngle1 setAngle2 setAnticlockwise setCenter setRadius writeDxf ~DxfArc

getAngleLength() double getAngleLength ( ) const 返回 角度长度.