CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

As soon as you get out of the scope of buildAABBTree()
your vector of triangles is destructed so your iterators are invalid.
The tree is then using invalid iterators...
I think if you switch the caching on in the primitive it might be
working.

http://doc.cgal.org/latest/AABB_tree/classCGAL_1_1AABB__triangle__primitive.html

Sebastien.

On 12/14/2013 01:36 PM, Asher Kamiraze wrote:
> Hi,
>
> Philipp, did you had time to take à look at the problem? Do you think
> it's a CGAL related issue, or a C++ coding one?
> I can continue usine the solution where I build the AABB tree and query
> it in the same method, but I'm also strongly interested in understanding
> what causes the problem.
>
> Best
>
> Asher
>
> Le jeudi 12 décembre 2013, Asher Kamiraze a écrit :
>
>     They are in my previous email from 11 december, 12:41. Can send them
>     again but do not want to overload the list. Let me know.
>
>     Asher
>
>
>     2013/12/12 Philipp Moeller 
> <>
>
>         Asher Kamiraze 
> <>
>  writes:
>
>          > Hi all,
>          >
>          > I finally managed to have a minimal test case which
>         reproduces the problem.
>          > It is attached as a new main cpp file. As you will see, the
>         problem arises
>          > when I build the AABB tree from triangles in a method, then
>         try to query it
>          > in another method. If I build the AABB tree and query it in
>         the same
>          > method, the problem does not appear, although the code is
>         strictly the same.
>          >
>          > Sorry for the ugly code, but please consider it as a one shot
>         test case to
>          > reproduce the problem. Just pass on the commad line the full
>         path to
>          > triangles.txt and queries.txt
>
>         It seems that there is a file missing. Could you please attach
>         "AABBTreeTestTypes.hpp" as well as triangles.txt and queries.txt?
>
>          >
>          >
>          > Hope you could help.
>          >
>          > Regards,
>          >
>          > Asher
>          >
>          >
>          > 2013/12/11 Asher Kamiraze 
> <>
>          >
>          >> Sorry,
>          >>
>          >> I reduced the files size to not exceed the ML limit.
>          >>
>          >> Regards,
>          >> Asher
>          >>
>          >>
>          >>
>          >> 2013/12/11 Asher Kamiraze 
> <>
>          >>
>          >>> Philipp,
>          >>>
>          >>> Here is a minimal sample which does NOT reproduces the
>         problem. This is
>          >>> nearly a copy / paste of some parts of my original code.
>         The only
>          >>> difference are:
>          >>>
>          >>>    - in my code, AABBTree tree and std::map<...,...>
>         facetsToQuery are
>          >>>    class members
>          >>>    - in my code, std::map< Face_handle,
>         std::vector<Simple_Segment_3> >
>          >>>    facetsToQuery; is defined as std::map< Face_handle,
>          >>>    std::vector<Simple_Point_3> > facetsToPoints; and the
>         segment query in the
>          >>>    attached sample is build from Simple_Point_3
>          >>>
>          >>> Attached archive contains triangles and queries from a real
>         case which
>          >>> causes a problem in my application.
>          >>>
>          >>> So, if you have any hint on why the attached code works and
>         my not, I am
>          >>> really interested :)
>          >>>
>          >>> Regards,
>          >>>
>          >>> Asher
>          >>>
>          >>>
>          >>> 2013/12/10 Philipp Moeller
>         
> <>
>          >>>
>          >>>> Asher Kamiraze 
> <>
>  writes:
>          >>>>
>          >>>> > Thank you Philipp for your answer. I agree with your
>         slicing idea, but
>          >>>> it
>          >>>> > appears that replacing my Custom_Triangle_3 with the
>         custom primitve as
>          >>>> > described in
>          >>>> >
>          >>>>
>         
> http://doc.cgal.org/latest/AABB_tree/AABB_tree_2AABB_custom_example_8cpp-example.htmldrops
>          >>>> > the same problem. Note that I use VS2010 64 + CGAL 4.2.
>          >>>>
>          >>>> By "the same problem" you mean that extra data in
>         My_triangle is not
>          >>>> properly preserved? That sounds very much like it
>         shouldn't happen. I
>          >>>> can have a look at it this week to see what is going on.
>          >>>>
>          >>>> >
>          >>>> > I am working on a minimal sample which reproduces the
>         problem, but
>          >>>> have to
>          >>>> > write it from scratch with IO from my applications. Once
>         done, I will
>          >>>> post
>          >>>> > it on the list with test data.
>          >>>> >
>          >>>> > You also suggest me to check how the object is
>         constructed. Should I
>          >>>> track
>          >>>> > in debug its insertion in the AABB tree to se