目的介绍D3D中环境映射的基本概念，详细论述用D3D实现立方体环境映射和球面环境映射的过程。
Aim to introduce the basic concepts of environment mapping in D3D, and detailedly discuss the process of using D3D to realize cubic and spherical environment mapping.
目的介绍D3D中环境映射的基本概念，详细论述用D3D实现立方体环境映射和球面环境映射的过程。
Aim to introduce the basic concepts of environment mapping in D3D, and detailedly discuss the process of using D3D to realize cubic and spherical environment mapping.
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