3ds文件格式，有利于opengl编程读取3ds文件。-3ds file format is conducive to opengl programming to read 3ds file.

在CityEngine中建立场景之后，我们需要对建立好的模型导出（以3ds和obj格式为例）。导出模式可以选择两种：Use file size limit和Create one file per shape。 Use file size limit：将所选模型作为一个obj或3ds文件导出 -Create a scene in CityEngine, we need to establish a good model to export (for example, in 3ds and

3DS file format specification for storing and exchanging 3d models