Directx游戏编程第18章的散射光代码，由于附带的源代码与最新版本的directx不兼容所以无法运行，修改某些参数后通过编译。-Directx Game Programming Chapter 18 of the scattered light code, because the source code with the latest version of directx is not compatible so it can not run, modify some parameters to compile.