[vtkusers] Delaunay 3D - qHull

[David Imboden]

Hello,

Ok I’m using QHull and I want to make a triangulation on a geographical map.
I just need to connect the nearest point.

I write in the file :

3 RBOX
Number of point
x y z
x y z



In the command prompt:
Qdelaunay s i<MyFile.txt TO result.txt

But the result is 4 colons?? Strange for a triangle and the problem is that
every point is connect many time to other!

How to connect only to the nearest? (Make a tin)

Thanks

=======================
David Imboden
c/o Luísa Pereira
Urb alto do Rio - Lote C 28
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Endereço de email : d at davidimboden.net 
Blog : www.davidimboden.net 
-----Message d'origine-----
De : Dominik Szczerba [mailto:domi at vision.ee.ethz.ch] 
Envoyé : mardi, 11. avril 2006 10:19
À : David Imboden; vtkusers at vtk.org
Objet : Re: [vtkusers] Delaunay 3D - Unable to factor linear system & file
format

> When I process a lot of Point in Delaunay3D (about 100’000) I have the
> following message:
> 
> Unable to factor linear system
> 
>  
> 
> Why ?

your points may be degenerate. check the same point set with qhull.


> 2.
> 
> I write a file with the output :
> 
>       uGridW->SetFileName("delaunay_temporary.txt") ;
> 
>       uGridW->Write() ;
> 
> But is it possible to choose my one file format?
> 
> Choose the separator, the nb of info one each line etc


of course. implement your own unstructured grid writer.

--dominik

> 
>  
> 
> Thanks
> 
>  
> 
> 
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-- 
Dominik Szczerba, Dr.
ETZ C110 CO-ME/BIWI CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi