Box2d Box2d Box2d Box2d Box2d Box2d Box2d Box2d Box2d Box2d center contains contains contains contains deflate deflate deflate deflate deflate empty get get get height inflate inflate inflate inflate inflate intersectWith intersectWith isEmpty isEmptyMinus isEqualTo isIntersect isNormalized isNull kIdentity leftBottom leftTop normalize offset offset offset operator & operator &= operator!= operator* operator* operator*= operator*= operator+ operator+ operator+= operator+= operator- operator- operator-= operator-= operator/ operator/= operator== operator| operator|= rightBottom rightTop scaleBy set set set set set set size swapTopBottom unionWith unionWith unionWith unionWith width xmax xmin ymax ymin

contains() [2/4] bool Box2d::contains ( const Point2d &  pt, const Tol &  tol  ) const 判断一个点是否在本矩形框内，闭区间 将本矩形框向外扩大长度容差的距离后来判断。 本矩形框必须规范化。 参数 pt 给定的测试点 tol 判断的容差，用到其长度容差 返回 如果在本矩形框内或框的边上，则返回true，否则返回false 函数调用图: