SMDS_3 - add class Simplicial_mesh_triangulation_3 to ease the use of C3t3

[janetournois]

The example c3t3_example forces the user to have typedefs for cell base, vertex base, Tds, T3...
I suggest to add a new helper type Simplicial_mesh_triangulation_3 that holds everything needed.

Summary of Changes

Add Simplicial_mesh_triangulation_3 and an example

Release Management

• Affected package(s): SMDS_3
• Feature/Small Feature (if any):
• Link to compiled documentation (obligatory for small feature) wrong link name to be changed
• License and copyright ownership: unchanged

Todo :

• write doc
• small feature

[janetournois]

@MaelRL @lrineau do you agree with the principle of that PR?
If you are ok I will write the doc and small feature

[lrineau]

@MaelRL @lrineau do you agree with the principle of that PR? If you are ok I will write the doc and small feature

Yes. But I think Simplicial_mesh_triangulation_3 should be a template alias, instead of a class template.

[janetournois]

@MaelRL @lrineau do you agree with the principle of that PR? If you are ok I will write the doc and small feature

Yes. But I think Simplicial_mesh_triangulation_3 should be a template alias, instead of a class template.

agreed!

[lrineau]

My patch was wrong. There is an error in the CI:

/home/runner/work/cgal/cgal/Installation/../SMDS_3/include/CGAL/Simplicial_mesh_triangulation_3.h:36:7: error: expected type-specifier before ‘public’
   36 |       public CGAL::Triangulation_3<K,
      |       ^~~~~~

Here is the fix, with a bit a reformatting as well:

Suggested change

	template<typename K,
	typename SubdomainIndex = int,
	typename SurfacePatchIndex = int,
	typename CurveIndex = int,
	typename CornerIndex = int>
	using Simplicial_mesh_triangulation_3 =
	public CGAL::Triangulation_3<K,
	CGAL::Triangulation_data_structure_3<
	CGAL::Simplicial_mesh_vertex_base_3<K,
	SubdomainIndex,
	SurfacePatchIndex,
	CurveIndex,
	CornerIndex>,
	CGAL::Simplicial_mesh_cell_base_3<K, SubdomainIndex, SurfacePatchIndex>,
	CGAL::Sequential_tag>
	>
	{};
	template<typename K,
	typename SubdomainIndex = int,
	typename SurfacePatchIndex = int,
	typename CurveIndex = int,
	typename CornerIndex = int>
	using Simplicial_mesh_triangulation_3 =
	CGAL::Triangulation_3<K,
	CGAL::Triangulation_data_structure_3<
	CGAL::Simplicial_mesh_vertex_base_3<K,
	SubdomainIndex,
	SurfacePatchIndex,
	CurveIndex,
	CornerIndex>,
	CGAL::Simplicial_mesh_cell_base_3<K, SubdomainIndex, SurfacePatchIndex>,
	CGAL::Sequential_tag
	> // end of CGAL::Triangulation_data_structure_3
	> // end of CGAL::Triangulation_3<
	{};