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

inflate() [4/5] Box2d& Box2d::inflate ( const Box2d &  box ) 中心不变，扩大矩形框 参数 box 向外侧的偏移， box.xmin为左侧的偏移距离，box.ymin为底侧的偏移距离， box.xmax为右侧的偏移距离，box.ymax为上侧的偏移距离 返回 本对象的引用