CGAL users discussion list

[Maxime Gimeno <>]

You can get the list of names of the properties attached to a given simplex type, with the function `properties<T>()`, but it won't return the actual thing, only a string.

So you can call `sm.properties<vertex_descriptor>()` and search for a string containing "normal", but then you would have to guess that it is actually a CGAL::Surface_mesh<Kenerl_t>::Property_map<vertex_descriptor_t, Kernel_t::Vector_3>  to get it. Or else you'll have to try for every possible type that could be a normal, like `std::array<float, 3>` for example, until one matches.

Le lun. 19 oct. 2020 à 23:36, Yaoyu Hu <> a écrit :

Hi there!

I am just wondering that for a surface mesh, without knowing the actual types of the property maps, can we get a list of the names (string) of the property maps? 

Or, without knowing the names (string) of the property maps, can we list all the property maps that have a specific type?

I'm thinking of scenarios like my upstream processing may produce a property map for vertex normals, but I do not know the type or the name of the vertex normal property map. I'd like to search for a property map that looks like a vertex normal property map. E.g I may look for a property map with the type of CGAL::Surface_mesh<Kenerl_t>::Property_map<vertex_descriptor_t, Kernel_t::Vector_3> but without knowing the name. Or look for a property map that has the name of "vertex_normals" (a non-conventional name) without knowing the type of the property map.

Regards,

Yaoyu

--
You are currently subscribed to cgal-discuss.
To unsubscribe or access the archives, go to
https://sympa.inria.fr/sympa/info/cgal-discuss