CGAL users discussion list

[Yoann LE BARS <>]

Hello everybody out there!

On 2018/11/08 at 11:31 pm, Chris Marsh wrote:
> I've updated the SO post with a full working example w/ all header
> includes & a cmake script to build it. It adds 3 vertices and inserts 1
> face.

        Far more than I could have expected, thank you. I have used it to 
check
my own CMake script, it turned out there was several mistakes.

        Now, as there are thousands of vertices and thousands of faces in the
meshes I am using, I cannot create a new variable for each. I need to
stock them in vectors, and cannot use “auto”. Therefore, I am looking
for the appropriate type. It turned out
“CGAL::Triangulation_data_structure_2::Vertex_handle” is not
appropriate, as it does not provide “set_point”:

/home/yoann/program/UWWatch-test/src/gmsh.cpp:131:27: error:
‘__gnu_cxx::__alloc_traits<std::allocator<CGAL::internal::CC_iterator<CGAL::Compact_container<CGAL::Triangulation_vertex_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>,
CGAL::Triangulation_ds_vertex_base_2<CGAL::Triangulation_data_structure_2<CGAL::Triangulation_vertex_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>
>,
CGAL::Constrained_triangulation_face_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>
> > > >, CGAL::Default, CGAL::Default, CGAL::Default>, false> >,
CGAL::internal::CC_iterator<CGAL::Compact_container<CGAL::Triangulation_vertex_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>,
CGAL::Triangulation_ds_vertex_base_2<CGAL::Triangulation_data_structure_2<CGAL::Triangulation_vertex_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>
>,
CGAL::Constrained_triangulation_face_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>
> > > >, CGAL::Default, CGAL::Default, CGAL::Default>, false>
>::value_type’ {aka ‘class
CGAL::internal::CC_iterator<CGAL::Compact_container<CGAL::Triangulation_vertex_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>,
CGAL::Triangulation_ds_vertex_base_2<CGAL::Triangulation_data_structure_2<CGAL::Triangulation_vertex_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>
>,
CGAL::Constrained_triangulation_face_base_2<CGAL::Projection_traits_xy_3<CGAL::Epick>
> > > >, CGAL::Default, CGAL::Default, CGAL::Default>, false>’} has no
member named ‘set_point’

> Because I am using this for terrain, I use x,y,z points and use the
> projection trait to allow for using this 3D point in a 2D triangulation.
> I've kept it this way as it may be of use to you.

        So far, I am using purely 2D points (no “z” coordinate) for a 2D
triangulation. I may be using 3D meshes later, but not now.

> I hope this helps,
        Well, I have spent a couple of days trying to sort this out by myself
and failed. Now, I am making some progress, so it clearly helps.

        Best regards.

-- 
Yoann LE BARS
http://le-bars.net/yoann/
Diaspora* :