CGAL users discussion list

[kyewong <>]

Hi, I met some polygonal meshes with errors in my project. The vertex indices
of one face may contain duplicated numbers. For example, after exporting to
a *.obj file, one line may be like:

f 193 25 75 113 149 185 75 25 49

I've attached the problematic obj file.
If reading in this file using CGAL and saving it to the Polyhedron_3 data
structure, an error will be reported.
However when I use some other tools, for example, the MeshLab which uses the
vcg as basis data structure, a valid triangular mesh can be obtained, and
the error face becomes a set of valid triangles:

f 25 149 193
f 193 149 185
f 193 185 49
f 49 185 75
f 49 75 25
f 25 75 113
f 25 113 149

I'm just wondering:
1 Whether it's possible to handle this problem using CGAL
2 If not, does anyone has idea on how to solve this problem or how vcg
solved this problem please?

Thanks very much!


http://cgal-discuss.949826.n4.nabble.com/file/n3990013/carve_csg_out.obj
carve_csg_out.obj 

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