CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

I'm not a mesh expert but I think you cannot insert some points in a 
triangulation and then ask for the surface mesher to work with this
triangulation to generate a mesh. In particular, you might insert some
points that are not compatible with the criteria you're asking.


Sebastien.


On 05/04/2014 06:27 AM, gupta61 wrote:
> Hi Sebastian,
>
> So I created the sscce as requested. Let me explain how the example works. I
> am trying to remesh a surface. The initial surface is defined in
> "Polyhedron_piyush_3.off". The main program to remesh is in file
> test_CGAL_remesh.C. There are a few other files in the folder, mainly config
> files.
>
> Now if you run the program as it is you will see that the error you get is
>
> terminate called after throwing an instance of 'CGAL::Assertion_exception'
>    what():  CGAL ERROR: assertion violation!
> Expr: den != 0
> File:
> /home/piyush/SetSolver_hg_checkin_crGrLaw/CGAL-4.4/include/CGAL/Cartesian/function_objects.h
> Line: 2384
> Abort (core dumped)
>
>
> But if you change the variable "double l = 0.1" to "double l =1.0"  and
> comment out the "point set 1" and uncomment the "point set 2", you will not
> get this error. You will infact be able to successfully remesh the surface.
> This is the error which I don't understand. Please let me know if you are
> able to replicate it and if you know why you are getting this error.
>
> Any response would be highly appreciated. Thanks.
>
> test_CGAL_remesh.C
> <http://cgal-discuss.949826.n4.nabble.com/file/n4659241/test_CGAL_remesh.C>
>
> test_CGAL_config.h
> <http://cgal-discuss.949826.n4.nabble.com/file/n4659241/test_CGAL_config.h>
>
> Polyhedron_piyush_3.off
> <http://cgal-discuss.949826.n4.nabble.com/file/n4659241/Polyhedron_piyush_3.off>
>
> Complex_2_in_triangulation_3_file_writer.h
> <http://cgal-discuss.949826.n4.nabble.com/file/n4659241/Complex_2_in_triangulation_3_file_writer.h>
>
> Surface_mesher.h
> <http://cgal-discuss.949826.n4.nabble.com/file/n4659241/Surface_mesher.h>
>
> testCGALRemesh.testCGALRemesh
> <http://cgal-discuss.949826.n4.nabble.com/file/n4659241/testCGALRemesh.testCGALRemesh>
>
>
>
> -----
> Piyush Gupta
> UIUC
> --
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