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OpenGL Eye Coordinates, Max and Min

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Is it possible to get or compute the maximum and minimum values of vertex eye coordinates of a scene? In other words find the max and min values of the vertex coordinates after the Modelview matrix but before the Projection matrix has been applied. (Refer to Red Book, Fourth Edition, page 102, Figure 3-2 Stages of Vertex Transformation) I am trying to figure out way to programatically determine the extents of an arbitrary scene. Using information which is present in the OpenGL vertex transformation pipeline would seem like a good way to approach this problem.

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