CGAL users discussion list

ok. I had a llok to mesh_2_demo.cpp and especially to open_triangulation 
(seems to accept .data), but algo is not very clear about what is done :-\
Is it possible (with cgal_4.0) to specify the coordinates of a polygon 
contour and to get _automatically_  the associated adaptive mesh (i mean 
adaptive mesh= adaptive sampling and triangulation) ? (i.e. smaller triangles 
along contours or sharp areas , and larger ones in the middle)
tahnks in advance
gwen
----- Mail original -----
De: "Laurent Rineau (GeometryFactory)" 
<>
À: 

Envoyé: Mardi 20 Mars 2012 15:46:01
Objet: Re: Re: [cgal-discuss] which demo?

Le mardi 20 mars 2012 15:35:04 

 a écrit :
> I have already tested constrained_delaunay_triangulation_2 but this demo
> triangulates outside of the shape if my shape is not convex :-( whereas on
> the "north america" picture, triangulation is only performed inside the
> area (even  i do not understand why some lake have been triangulated and
> some others not...).

CGAL triangulations always triangulate the whole convex hull. But the quality 
of triangles is ensured by Mesh_2 only inside the domain.

The old Mesh_2 demo that uses Qt3, located in demo/Mesh_2/Qt3/ does display 
only triangles of the meshing domain. That may be the demo you are looking 
for.

Some lakes were not meshed because we manually put negative seeds inside 
them. 
See the user documentation of Mesh_2:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Mesh_2/Chapter_main.html#Subsection_46.2.1

-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/


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