CGAL users discussion list

["Robert Cupisz" <>]

Hi all,

I have done some more testing. I'm sorry to say that, but boolean
operations on nef polyhedra doesn't work at all. Why there is no
information about it on the project site? I'm sure I'm not the only
person who has lost so much time (and hair ;) trying to make it work.

Oh well, maybe somebody knows an open source project which can deal
with boolean operations on b-rep of polyhedra? Of course the
intersection and negation would suffice to generate all the other
functions. I know that Blender has a great boolean tool, but the code
of the tool is so integrated with other parts of Blender that it makes
it super hard to analyze it and impossible to reuse it.

cheers,
robert


On 7/24/07, 

 
<>
 wrote:
> Hi all,
>
> I've just started using cgal and I must say that I'm amazed - you're doing 
> quite a job down there :) I wonder why I haven't come by cgal earlier...
>
> There's one issue, though. I need cgal mainly to perform boolean operations on 3D 
> meshes - polyhedra. To be more precise - only the sum and the difference. I've been 
> testing all day different variations of the "offIO" example, and no matter 
> what I do, almost always get bad results, i.e.: after doing an AND a messed-up mesh 
> with some faces inside, intersection in place of a sum, a general mess in place of a 
> difference of meshes and sometimes even non-simple nef polyhedra, which cannot be 
> converted to a mesh.
>
> Is the module finished and well tested? I thought so, but I'm loosing my 
> faith. If it is, could somebody provide me with a sample code that copes well 
> with some adding or substracting of meshes? Or point out where I could be 
> making my mistake?
>
> thanks,
> robert
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