ArcofCircle ArcofCircle ArcofCircle ArcofCircle calculateCircleCenter calculateStartandEndPoint copy getArcType getCenterPoint getDirection getEndAngle getEndAngle getEndPoint getExtrema getLength getMidPoint getNormal getRadius getRefVec getSecondPoint getStartAngle getStartPoint isClockWise isClosed isInArc mArcType mCenterPoint mClockWise mEndAngle mEndPoint mMidpoint mNormal mRadius mRefVec mSecondPoint mStartAngle mStartPoint Reverse setCenterPoint setDirection setEndAngle setNormal setRadius setReferenceAxis setRefVec setStartAngle

getNormal() Base::Vector3d getNormal ( ) 获取所在平面的法向量 获取三维圆弧所在平面的法向量