CGAL users discussion list

[Danyang Su <>]

Hi Jane,

Sorry for the late reply. Thanks for your suggestion and it works if I 
use an triangulated surface mesh.

Now i have another question regarding the surface mesh generation.

I got the following error when compile the demo codes. The code and make 
command are attached.
fatal error: CGAL/Surface_mesh.h: No such file or directory
  #include <CGAL/Surface_mesh.h>

Is any compiling flags missing in the sh file?

Thanks and regards,

Danyang

On 16-01-04 11:45 PM, Jane Tournois wrote:
> Hi Danyang,
>
> your input polyhedron should be triangulated.
> You can do this using the function
> CGAL::Polygon_mesh_processing::triangulate_faces() [1]
>
> I called it on your input and attach the triangulated version to this
> email.
>
> Your code works perfectly on it!
>
> Regards,
> Jane.
>
> [1]
> http://doc.cgal.org/latest/Polygon_mesh_processing/group__PkgPolygonMeshProcessing.html#ga78da163452ce0675288191bcab1dedc8
>
>
> Le 03/01/2016 16:43, Danyang Su a écrit :
> > Hi All,
> >
> > I am new to CGAL and has a question regarding 3D mesh generation from
> > a specific domain. The code file cgal_mesh.cc is attached with two
> > data files included. If I use fandisk.off data file as the domain, it
> > works fine. But if I use T3d_rec.off as the domain, it crashes with
> > error information as below.
> >
> > terminate called after throwing an instance of
> > 'CGAL::Assertion_exception'
> >   what():  CGAL ERROR: assertion violation!
> > Expr: !r_tr_.is_infinite(*cell_it)
> > File: /usr/include/CGAL/Mesh_3/Refine_cells_3.h
> > Line: 385
> > Aborted
> >
> > The latter data file T3d_rec.off is just a simple hexahedron with
> > similar scale as fandisk.off.
> >
> > Could anyone let me know what is wrong with the code, especially the
> > mesh criteria.
> >
> > Thanks and regards,
> >
> > Danyang


#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/boost/graph/graph_traits_Surface_mesh.h>
#include <CGAL/Polygon_mesh_processing/triangulate_faces.h>
#include <fstream>
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef Kernel::Point_3                    Point;
typedef CGAL::Surface_mesh<Point>          Surface_mesh;
int main(int argc, char* argv[])
{
  const char* filename = (argc > 1) ? argv[1] : "data/P.off";
  std::ifstream input(filename);
  Surface_mesh mesh;
  if (!input || !(input >> mesh) || mesh.is_empty())
  {
    std::cerr << "Not a valid off file." << std::endl;
    return 1;
  }
  CGAL::Polygon_mesh_processing::triangulate_faces(mesh);
  std::ofstream cube_off("P_tri.off");
  cube_off << mesh;
  cube_off.close();
  return 0;
}

Attachment: triangulate_faces_example.sh
Description: application/shellscript