rt | 需要 Mipmap 生成的渲染纹理。 |
生成渲染纹理的多级渐进纹理级别。
Use this function to manually re-generate mipmap levels of a render texture. The render texture has to have mipmaps (useMipMap set to true),
and automatic mip generation turned off (autoGenerateMips set to false).
在某些平台上(最著名的是 D3D9),无法手动生成渲染纹理 Mip 级别;在这些情况下,此函数不执行任何操作。
另请参阅:useMipMap、autoGenerateMips。
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