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transform feedback

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hello.
Is possible to retrieve the vertexes of the geometry shader or of the vertex shader on the cpu?
For example(but it's only an example for try and understand), if i have a skinned mesh , is possible retrieve a pose of the mesh after the vertex shader transformations?
I read about the "transform feedback".
how it work if is possible? there is a link?
thanks.

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The feature is generally called "render to vertex buffer". Try searching for that term, e.g. [url="http://devmaster.net/forums/topic/6093-render-to-vertexbuffer-in-opengl-howto/"]this[/url] seems to be relevant.

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