CGAL users discussion list

[Dennis Endt <>]

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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