CGAL users discussion list

["Tardugno, Angelo" <>]

Actually the file is a vtk file. Anyway, I think i can transform it into an OFF file is I have to....

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From: Mariette Yvinec [mailto:]
Sent: 05 June 2007 10:26
To:
Subject: Re: [cgal-discuss] Reading a surface triangulation

Tardugno, Angelo wrote:

Hello everybody,

 

I have to import a surface triangulation into my code and I was wondering what's the best way of doing that.

Basically, I've got the file in this format:

 

x1 y1 z1            // Begin coordinates of points

.. .. ..

xn yn zn            // End coordinates of point

1 2 3                // Point connectivity, describing the triangles of the traigulation

2 5 6

.. .. ..

5 1 n

 

What do I have to do? Create a triangulation T and then simply outputing the content of the file to T?

 

in_stream >> T

 

?

 

I've read the output of out_stream << Triangulation and it seem more or less the same.The only difference is that there are four vertices in the connectivity part, since it's using tethraedrons. Can I use simple triangles in 3D?

 

Thanks

 

Angelo Tardugno

Your file looks like an off file.
Triangulation_data_structure_2  has an (undocumented) function
called off_file_input to read off-files of surface meshes.
You might try to use/adapt it ....