CGAL users discussion list

[Jayesh Salvi <>]

^ Bump ^

Any thoughts?
--
Jayesh



On Sun, May 29, 2011 at 4:43 PM, Jayesh Salvi 
<>
 wrote:
> Hello,
>
> In my program I am creating two polyhedrons from two meshes (In this
> case a cube and a sphere). Then I convert them to Nef Polyhedra and
> apply union (+) operation on them. I then convert the returned Nef
> Polyhedron into a Polyhedron_3, but before doing that I run
> is_simple() check (just so that if it is not simple, I can generate an
> error message, instead of assertion failure crash during the
> conversion process).
>
> In this particular case - with a cube and sphere of specific
> geometries - I observed that after some time the program starts
> occupying a lot of memory and consumes most of the CPU. From the top
> utility, I can see that the process is taking >90% memory and >90%
> CPU. To see what's going on, I put cout statements at various places
> to see during which part of the program does this start to happen. I
> was surprised to find out that this happens when I call is_simple()
> check on the nef polyhedron. At this point either I have to kill the
> process or the system terminates it.
>
> I tried to run the program through valgrind, but as I read elsewhere
> valgrind can't be used with CGAL programs because of floating point
> issues.
>
> Do you have any suggestions how can I proceed to debug this?
>
> Thanks in advance.
>
> (My project is available at http://jayesh3.github.com/cadmium/ I can
> provide instructions on how to reproduce the issue, if you need)
> --
> Jayesh
>