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

isEqualTo() bool Box2d::isEqualTo ( const Box2d &  box, const Tol &  tol = Tol::gTol()  ) const 判断两个矩形框是否相等 参数 box 另一个矩形框 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: