CGAL users discussion list

[Marc Alexa <>]

Dear all,

I am generating a tetrahedral mesh using the suite of algorithms in Mesh_3. I 
want to use the resulting mesh in my code, which is based on Triangulation_3. 
The vertex and cell base classes are incompatible. My preferred way for doing 
this would be writing the mesh to a file. Unfortunately, the formats of the 
stream operators are different. Is there an easy way to “reduce” what is 
being written by Mesh_3 to what is being expected by Triangulation_3?

On a side note: I understand that if I am not using sliver exudation, the 
triangulation generated by Mesh_3 will be Delaunay. This means I could export 
the points only (and then reconstruct the tetrahedra). Then I only need 
information on which tetrahedra are in the interior of the meshed surface. I 
tried to circumvent this by using a simple convex surface, namely a sphere. 
Yet even for the sphere some tetrahedra are excluded, despite clearly lying 
in the interior. I do understand that the excluded tetrahedra are slivers, 
but wouldn’t it make sense that a tetrahedral mesh with the boundary vertices 
on the sphere contained everything inside the sphere?

Best,
Marc