world coord

[Jaroslaw Rzepecki <jarekr@xxxxxxxxxxxxxxxxx>]

Hi!
 I have the following problem: I wont to make something like interactive
scene geometry sliceing - i would like to be able to define (with mouse) a
plane accordint to which whole scene geometry would be clipped. (I'm
useing SoClipPlane) The problem is that when i read mouse position (two
mouse positions define plane with constant z coord) i get
coords in pixels or normalized coord and i need world coords. How can i
convert normalized coords into world coords? 
 Maybe there is a simpliest way to perform interactive clipping?

Thank you
                        jarek

                                
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                                *        Jarek Rzepecki        *
                                *    jarekr@xxxxxxxxxxxxxxxxx  *
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