| areaIndex | 要获取的区域的索引。 |
获取区域类型几何体的寻路成本。
该值适用于所有代理，除非您通过调用 NavMeshAgent.SetAreaCost 为每个代理自定义了该值。
您可以使用 NavMesh.GetAreaFromName 根据 NavMesh 区域类型的名称查找区域索引。
另请参阅：Areas and Costs，了解如何使用不同的区域类型。
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