CGAL users discussion list

[Andreas Fabri <>]

Hi Sinan,

When nothing is read, then it is at least normal
that nothing is written.

So let's continue the remote debugging and do another
divide and conquer step.

Is is valid, that is, are you sure the stream is open?

If yes, do you compile in debug mode  so that you
get assertions during the execution?

Did you read the spec of the operator >> (const istream&, Suerface)
Maybe the surface must be watertight, the faces be
oriented consistently,...

andreas



sinan mutlu wrote:
> Dear Andread Fabri,
>
> I have tried the code below:
>   
>    Surface surface;
>     float maxface=0.1;
>
>     std::ifstream is("cow.off") ;   //std::ifstream is("skull.off") ;
>     is >> surface ;
>
>    Surface::Point_iterator pn = surface.points_begin();
>     int i = 0;
>     while(pn!=surface.points_end())
>         i++;
>     std::cout<<i<<endl;
>
> and the result is "0".
>
> I do not know much about the library. Maybe I have done wrong things. I 
> guess it reads nothing from the file.
>
> Thank you for your time and consideration.
>
> Sinan
>
>
> On 04/04/2008, *Andreas Fabri* < 
> <mailto:>> wrote:
>
>     sinan mutlu wrote:
>
>         Hi again,
>
>         I am trying to use
>         "CGAL-3.3.1\examples\Surface_mesh_simplification" example. While
>         it works for "cube.off" file it does not work
>         for another "xxx.off". For example I have a skull.off file and
>         in the main function I have tried this
>
>         Surface surface;
>         std::ifstream is("skull.off") ;
>         is >> surface ;
>
>
>
>     Hi Sinan,
>
>     Can you check here, that you really have read something.
>     Just print surface.number_of_vertices() or something similar.
>
>     andreas
>
>
>
>
>         std::ofstream out("output.off");
>         out<<surface;
>
>         The output in the output.off file
>         OFF
>         0 0 0
>
>         I could not understand the reason. Can anybody help me, if there
>         is someone who had this problem before.
>
>         Note: skull.off file is in the attachment.
>
>
>
>
>
>
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