[Insight-users] AutomaticTopologyMeshSource in pipeline

[Luis Ibanez]

Hi Peter,

Thanks for pointing this out.

We were able to reproduce the problem that you reported
and logged a bug report in the bugTracker database.

It got assigned the ID # 1001
http://www.itk.org/Bug/bug.php?op=show&bugid=1001&pos=0

The problem has now been fixed by invoking

      ReleaseDataBeforeUpdateFlagOff()

In the constructor of AutomaticTopologyMeshSource.


You may have to update your CVS checkout in order
to get the fixed version of this class.

You could also patch your local copy of ITK:
http://www.itk.org/cgi-bin/viewcvs.cgi/Code/Algorithms/itkAutomaticTopologyMeshSource.txx?r1=1.15&r2=1.16&root=Insight


Please let us know if you find any further problems,


    Thanks


       Luis



-----------------
Peter Cech wrote:

> Hi,
> 
> I was trying to feed the mesh constructed by AutomaticTopologyMeshSource
> (using AddPoint and AddTriangle methods) to DeformableMesh3DFilter, but
> got a segfault. Debugging revealed that call to Update method of
> DeformableMesh3DFilter triggers PrepareOutputs method of
> AutomaticTopologyMeshSource (inherited from ProcessObject) which causes
> reinitialization of it's internal mesh object (output pointer points to
> the same mesh that is created by Add* methods). By reinitialization both
> points and cells containers of input mesh are freed and become zero
> pointers and all data are lost. Later DeformableMesh3DFilter segfaults
> when trying to access points or cells of input mesh.
> 
> Is it a bug or did I just miss something that will regenerate output
> mesh of AutomaticTopologyMeshSource before passing it further in
> pipeline?
> 
> Regards,
> 
> Peter Cech
> 
> PS: Experiments were conducted with today's CVS.
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