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

isClockWise() bool isClockWise ( ) const 获取方向 获取三维椭圆弧的方向 返回 true逆时针，false顺时针