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Making A Box Like The Camera Frustum

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Hi all,

I am trying to create a box in the shape of the full frustum when you turn it on for a camera in the viewport. I wish there was a way to get that information striaght from the camera. Theinformation is clearly there because the area is drawn in the viewport!

In any case, given that I have access to all the standard camera parms (focal length, aperture, camera position, near clipping plane, far clipping plane, aspect ratio, etc.) how can I recreate that box?

I have been scouring the net and my books and have come up with things about frustum clipping planes but I can't quite pull of the pieces together to build my box!


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