CGAL users discussion list

["M. Hazegh" <>]

Did you bother looking at the manual?
http://www.cgal.org/Manual/3.3/doc_html/cgal_manual/Mesh_2/Chapter_main.html

On Sat, Oct 4, 2008 at 6:13 PM, Dennis Endt 
<>
 wrote:
> Thanks for you help, I foudn a solution with
>
> Triangulation T;
>
> for(Triangulation::Finite_facets_iterator it = T.finite_facets_begin();
> it != T.finite_facets_end(); it++)
> {
>        T.triangle(*it).vertex(i)
> }
>
> Bu another Question. I integrated CGAL into my Project about to
> triangulate faces of different buildings.
>
> So I tried to use the 3D Delaunay Triangulation, but now I`ve the
> problem, that he also triangulates *in* my Object and not only the surfaces.
>
> For example I´ve an 3D Rectangle, what I have to do, to triangulate only
> the surfaces, so that I will have two triangles for each side and no
> triangles in my object?
>
> I tried also to adding the faces step by step about to triangulate them
> afterwards but it didn`t helped:
>
> Triangulation T;
>
>    for(map<vector<QString>,QString>::iterator fListIter=fList.begin();
> fListIter != fList.end(); fListIter++)
>    {
>        vector<Triangulation::Point> triFacePoints;
>        vector<QString> fPoints = fListIter->first;
>        for(vector<QString>::iterator fPointsIter = fPoints.begin();
> fPointsIter != fPoints.end(); fPointsIter++)
>        {
>            map<QString,Triangulation::Point> ::iterator iter =
> pList.find(*fPointsIter);
>            if(iter != pList.end())
>            {
>                triFacePoints.push_back(iter->second);
>            }
>        }
>        T.insert(triFacePoints.begin(),triFacePoints.end());
>    }
>
> This is very important to me. I hope someone could help me.
>
> Greets...
>
> M. Hazegh schrieb:
>> Your code will iterate through all faces of the triangulation. since
>> "it" is pointing to the current face, then
>> CGAL::to_double(it->vertex(i).x())
>> will return the x coordinate of the i'th vertex. For a triangle i = 0, 1, 2
>>
>> If you want to iterate through all vertices of the triangulation, you
>> can use a Vertex_iterator. See the manual for more info.
>>
>> On Sat, Oct 4, 2008 at 2:41 PM, Dennis Endt 
>> <>
>>  wrote:
>>
>>> Can anyone plz tell me how to read the the points of a facet?
>>>
>>> I tried to use this:
>>>
>>> for(Triangulation::Finite_facets_iterator it = T.finite_facets_begin();
>>> it != T.finite_facets_end(); it++)
>>> {
>>> }
>>>
>>> But I didn`t find anything then to read the points with their coordinates.
>>>
>>> And what is the difference between finite and not finite faces/edges ...?
>>>
>>> I`m very thankful for every helpful information.
>>>
>>>
>>>
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