CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

Jatin Relan wrote:
> Hi all,
>
> I have a question about interpolation on a mesh.
Is your mesh a surface or volume mesh? Interpolation method in CGAL are 
only available in 2D and for 2D surfaces.
(see 
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Interpolation/Chapter_main.html)

> Q.1 Say, I have a mesh with an attribute values for some of the vertices (a 
> subset), is there any interpolation method in CGAL to interpolate the 
> attribute values for all the remaining vertices (where I didn't had data)?
>
> Q.2 Which interpolation method it would use?
>
> Q.3 Say I have a mesh with given set of vertices, I choose a subset of 
> vertices. Now I want to remesh (or decimate) the surface such that the new 
> surface would have total number of vertices as only those vertices which I 
> chose. Is there any method to do that in CGAL?
Have a look at the surface mesh simplification package here:
http://www.cgal.org/Manual/latest/doc_html/cgal_manual/Interpolation/Chapter_main.html

Look at "Example with edges marked as non-removable". Marking all edges
incident to your marked vertices as non-removable should do what you
want.


> Q.4 Is it possible to smooth a tetrahedral mesh in CGAL?
Do you mean smoothing the surface and maintain the tetrahedral mesh?
> Thanks very much in advance.
>
> Cheers,
> Jatin