CGAL users discussion list

[Laurent Saboret <>]

Hi Fulvio,

CGAL surface mesh parameterization uses a wrapper (an "adaptor") around 
Polyhedron_3 meshes named Parameterization_polyhedron_adaptor_3. 
mesh_main_border_vertices_begin(), mesh_main_border_vertices_end() and 
get_vertex_uv () are methods of the adaptor.
get_vertex_position() will provide you a vertex 3D position.
See 
http://www.cgal.org/Manual/last/doc_html/cgal_manual/Surface_mesh_parameterization_ref/Concept_ParameterizationMesh_3.html

Best regards,
Laurent Saboret


Fulvio Mastrogiovanni wrote:
> Dear All,
>
> I am trying to do something which - I am sure - it is pretty simple, but I
> cannot figure out how to do it.
>
> Basically, after a parameterization (e.g., least square free border
> parameterizer, straightforward given the excellent example) I would like to be
> able to 1) retrieve the coordinates of the border vertices, as well as 2) the
> mapping between 2D (u,v) and 3D (x,y,z) coordinates (e.g., retrieving the
> latter given the former).
>
> Having a polyhedron, this should be very simple. For instance, I though the
> first problem could be dealt with like this:
>
> // Iterate over the mesh border
> Polyhedron::Vertex_iterator viBorder;
> for(viBorder = pMesh.mesh_main_border_vertices_begin(); viBorder !=
> pMesh.mesh_main_border_vertices_end(); viBorder++)
> {
>         ppaMeshAdaptor::Point_2 p2Point;
>         p2Point = pMesh.get_vertex_uv(viBorder);
>         double dX = p2Point.x();
>         double dY = p2Point.y();
>         cout << dX << " " << dY << endl;
> }
>
> Unfortunately I experience problems since, e.g.,
> mesh_main_border_vertices_begin() is not a member of
> CGAL::Polyhedron_3<PolyhedronTraits_3>...
>
> What am I doing wrong here? Sorry for the naive questions.
>
> Best,
>
> Fulvio
>
>   

Ce courrier électronique et toutes les pièces éventuellement jointes qu’il 
contient sont CONFIDENTIELS et destinés exclusivement à l’usage de leur 
destinataire. Si une erreur de transmission ou une adresse erronée a mal 
dirigée ce courrier, merci d’en informer l’expéditeur en lui faisant une 
réponse par courrier électronique dès réception. Si vous n’êtes pas le 
destinataire de ce courrier, vous ne devez pas l’utiliser, le conserver, en 
faire état, le distribuer, le copier, l’imprimer ou en révéler le contenu à 
une tierce partie.
Ce courrier électronique est à usage strictement informatif et ne saurait 
engager de quelque manière que ce soit INFOTERRA France SAS, ni ses filiales.

This e-mail and any attachments hereto are CONFIDENTIAL and intended solely 
for the use of the addressee. If you have received this e-mail in error 
please send it back to the person that sent it to you.
If you have received it in error, please notify the sender by return email. 
If you are not the addressee of this email, you must not use, keep, 
disseminate, copy, print or otherwise deal with it.
This email is for information only and will not bind INFOTERRA France SAS in 
any contract or obligation, nor its subsidiaries.