ArcofEllipse2D ArcofEllipse2D calculateStartEndPoint copy getCenterPoint getEndAngle getEndPoint getLength getMajorAxisDir getMajorRadius getMinorRadius getStartAngle getStartPoint isClockWise isClosed mCenterPoint mClockWise mEndAngle mEndPoint mMajorAxisDir mMajorRadius mMinorRadius mStartAngle mStartPoint setCenterPoint setEndAngle setMajorAxisDir setMajorRadius setMinorRadius setStartAngle

getMajorAxisDir() Base::Vector2d getMajorAxisDir ( ) const 获取基准轴 获取二维椭圆弧的主轴方向