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loop的是面网格上的所有网格。你的需求应该能实现,最简单的办法是,每个面网格中心去读一遍文档,把散点距离自己最近的那个点的速度赋给所在网格。但是会有其他问题,散点疏密是不是和面网格疏密比较匹配,也许一个面网格配多个散点或者反之。