Quad tree and multi - resolution technique are the most efficient ways to express and display complex terrains.

四叉树和多分辨率技术是目前表示地形结构和显示地形的最佳方式.

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A simple and efficient method used for finding quad - tree neighbor is also introduced in the paper.

而后本文研究了一种新的带边框四叉树表示法,并应用到了规划算法当中.

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