CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

There is not official way to do it.

If you dig into CGAL/internal/Surface_mesh_segmentation/SDF_calculation.h

you'll see the function calculate_sdf_value_of_facet
that computes the centroid of the face and then call
calculate_sdf_value_of_point.
You'll need to provide a custom SkipPrimitiveFunctor so that
all faces incident to the vertex you consider are ignored
in the ray/segment-shooting

Sebastien.

On 05/17/2016 09:27 AM, 刘川 wrote:
> Hi!
>
> I'm using CGAL to compute sdf values of a 3D shape according to
> sdf_values_example
> <http://doc.cgal.org/latest/Surface_mesh_segmentation/Surface_mesh_segmentation_2sdf_values_example_8cpp-example.html>
>
> The code show me how to compute the sdf value of each facet of the mesh.
> But I want to get the sdf value on each vertex. Namely, the axis of the
> cone is the opposite of the normal of a vertex.
>
> I wonder if there is anyway to compute sdf on vertices rather than facets?
>
> Thanks a lot!
>
> Lau