| distances | 包围距离的数组。这些距离应按升序排序。 |
设置该组应计算的“距离带”的包围距离，以及有关应如何处理属于每个距离带的球体的选项。
每个距离值均表示“达到”该距离的带；数组 [10, 20, 30] 描述“从 0 到 10m”、“从 10m 到 20m”和“从 20m 到 30m”的距离带。
使用从参考点（由 CullingGroup.SetDistanceReferencePoint 设置）到该球体最近边缘的距离来计算球体所在的距离带。因此，覆盖多个距离带的球体将被视为在距参考点最近的距离带内。
除了强制使对象是否可见，您还可以使用距离带来驱动您对象中的细节级别更改。例如，您可以定义“从 0 到 40m”以及“从 40m 到 80m”的距离带，尽管您可以使两个距离带都正常应用遮挡和视锥体剔除，但您可以使用不太复杂的骨架为第二个距离带中的对象生成动画，或者使它们运行不太复杂的 AI 行为。
默认情况下，超出最终包围距离的任何球体都被隐式强制为不可见。为避免这种情况，您可以指定最终包围距离为 float.PositiveInfinity。
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