ArcofCircle2D ArcofCircle2D ArcofCircle2D calculateCircleCenter calculateStartandEndPoint copy getCenterPoint getDirection getEndAngle getEndPoint getExtrema getLength getMidPoint getRadius getStartAngle getStartPoint isClockWise isClosed isInArc mCenterPoint mClockWise mEndAngle mEndPoint mRadius mSecondPoint mStartAngle mStartPoint setCenterPoint setDirection setEndAngle setRadius setStartAngle

ArcofCircle2D() [2/3] ArcofCircle2D ( Base::Vector2d  center, double  radius, double  startangle, double  endangle  ) 构造二维圆弧 基于圆心，半径，起始角度和终止角度 参数 [in] center 圆心 [in] radius 半径 [in] startangle 起始角度 [in] endangle 终止角度