add asVector distanceSquare distanceTo get isDegenerate isEqualTo kInvalid kOrigin length negate offset offset operator!= operator* operator* operator* operator* operator*= operator*= operator+ operator+ operator+ operator+= operator+= operator- operator- operator- operator-= operator/ operator/= operator== Point2d Point2d Point2d polarPoint rulerPoint rulerPoint scaleBy scaleBy set set subtract subtract transform x y

isEqualTo() bool Point2d::isEqualTo ( const Point2d &  pnt, const Tol &  tol = Tol::gTol()  ) const 用欧拉规则判断两个点是否相等 如果两个点的距离小于长度容差，则相等 参数 pnt 比较的另一个点 tol 判断的容差，用到其长度容差 返回 如果相等，则返回true，否则返回false 函数调用图: 这是这个函数的调用关系图: