For example, object bounding boxes may first be tested to see if polygon based testing is necessary - or bounding box intersection may often be all that is needed to provide acceptable results.
例如，首先可能要测试物体碰撞盒子，看是否需要基于测试的多边形，或者碰撞盒子交叉点可能经常成为提供满意结果的唯一来源。
In the process of intersection calculating among different loops, rectangular bounding box was used to find the curves which had the chances for intersecting.
在环间相交交点的求取过程中，引入包围盒技术对可能存在相交的线段进行初次筛选，减少了线段相交性判断的次数。
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