[vtkusers] Need help on this coordinate problem..

[Dean Inglis]

Hi Ingo,

I think what you need to do is just visulaize the intersections
of the parent renderer camera's view frustum planes but in the smaller
renderer.  That is find the line intersections between
frustum plane pairs {0 , 4}, {1 , 4}, {2 , 4} and {3 , 4}
where planes 0 to 3 are the left rigth bottom and top planes and
plane 4 is the near clipping plane.

Dean