CGAL users discussion list

[Merlin Etzold <>]

Dear Andres,

As a follow on (again, the inexperienced user is speaking ;-) ): now I have all the vertices, but I had naively assumed that I would have write access to the coordinates?

Thank you and best wishes,

Merlin :)

Merlin A. Etzold, PhD

24 Oyster Row

Cambridge

CB5 8LJ

United Kindgom
+44 7851 467997

On 5 April 2016 at 10:29, Andreas Fabri <> wrote:

Hello,

You can use
http://doc.cgal.org/4.8/BGL/group__PkgBGLIterators.html#ga7746cb7b28520877375dfff6ec7bd32c

as follows:

typedef boost::graph_traits<Polyhedron>::vertex_descriptor
  vertex_descriptor;
typedef boost::graph_traits<Polyhedron>::face_descriptor
  face_descriptor;

Polyhedron P;

BOOST_FOREACH(face_descriptor fd, faces(P)){
  BOOST_FOREACH(vertex_descriptor vd,
                CGAL::vertices_around_face(halfedge(fd,P),P)){
    std::cout << vd->point() << std::endl;
  }
}

andreas

On 05/04/2016 11:22, Merlin Etzold wrote:

Dear All,

I have 3D Polyhedra which I want to represent as Polyhedron_3 which
shall represent growing shapes. To simulate the growth process I want to
shift individual facets along their normal direction. My strategy to do
this is to access the vertices belong to the facets and apply a
translation them towards the desired direction.

However, as an inexperienced CGAL user I struggle a bit finding the best
strategy to access the vertices belonging to the neighbouring facets. Is
there an easy way to get an iterator for the vertices belonging to a facet?

Thank you and best wishes,
Merlin

--
Andreas Fabri, PhD
Chief Officer, GeometryFactory
Editor, The CGAL Project

phone: +33.492.954.912    skype: andreas.fabri

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