[gl2ps] Boolean operation of CSG volumes

[barrand]

     Hello

   I was just wondering if people on this list may have ideas on how to
  treat the visualization of boolean operations of solids.

   In my things, I am using some algorithms that appears to have  
defects.
  And the man that had developed this code is no more around... (and  
obviously
  the algorithm is "tricky" and then hard to jump in).

   People suggest me that perhaps a "brute force" algorithm working
  on triangles of the shapes to add, substract, intersect may work in  
all cases.
  And as in gl2ps, I know that you do primitve sorting, I have though  
that
  perhaps some may have idea on that point.

   I know also that some can do that by exploiting the stencil  
capabilities
  of OpenGL but I never been able to put the hand of a nice packaging
  of that ; something I can embed in my things. (Moreover I need  
something
  that works within the Inventor / coin3d environment and some way
  exploiting the triangles would pass here).

   But some of you may also have some URL of some good open source
  piece of code to do that...

    Regards

      Guy