The first is to subdividethe texture image into fixed sized tiles and selectively draw the geometry thatcorresponds to each image tile, one at a time, reloading texture memory foreach new tile.

• 第一个是对纹理图片进行细分，生成固定大小的纹理单元（tiles）并且每次有选择的绘制相应的几何体，对于每个新的单元，则重新载入纹理内存。