Just like the name says, the faces of an axis-aligned bounding box are aligned with the coordinate axes of its parent frame (see Figure 3). In most cases AABBs can fit an object more tightly than a sphere, and their overlap test is extremely fast.ust like the name says, the faces of an axis-a
阅读背景：
An Axis-Aligned Bounding Box (AABB) Sweep Test
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