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

isIntersect() bool Box2d::isIntersect ( const Box2d &  box ) const 判断是否和一个矩形框相交（两者都是规范化矩形） 如果其中一个矩形为空矩形或非规范化矩形，则返回false。 参数 box 另一个矩形框，必须规范化 返回 是否相交，失败时返回false 函数调用图: 这是这个函数的调用关系图: