地形数据

• In chapter 3 , for the case that the terrain data can not fit in memory , we describe a data layout technique of providing coherent access to the terrain data that are consistent with our mesh simplification . we reorder the data in a manner that is of multiresolution and the overhead is completely eliminated
  第三章中，为了能处理超出内存容量的地形数据，我们对海量地形数据进行了重新组织，设计了一种基于层次二叉树的遍历方式的顶点存储方式，存储的顶点数据是多分辨率组织的，并且没有冗余。