It's a little bit more complicated than that, because this buffer is now an OpenGL texture and can be the result of rendering OpenGL graphics to the texture or compositing other textures together.

实际情况要比这要比这复杂一些，因为该缓冲现在是OpenGL纹理，也可以是OpenGL图形渲染结果的纹理，或者是其他纹理混合在一起的结果。

youdao

The root-level template works the same as that in the scatter plot example, rendering instructions for the elements and then calling showpage to render the contents of the graphics buffer.

root - level模板的工作原理与散点图示例中的工作原理相同，它将呈现元素的指令，然后调用showpage以呈现图形缓冲的内容。

youdao

If Z buffer can't be accessed as a texture, then depth is rendered in additional rendering pass, using shader replacement.

如果Z缓冲不能被以纹理的方式访问，那么深度将在额外的渲染处理中被使用着色器替代技术渲染。

youdao