I am trying to use MMG3D to remesh models including internal surfaces (for example a cube with an internal surface inside it).
I want to conserve the triangle faces which bound the volume of my models and the triangles belonging to the internal surface(s). I have tried to set the triangles as required in the input mesh. The external triangles are correctly kept but not the internal ones (warning: extra boundaries provided are ignored).
In a second attempt, I have tried to set as required vertices all the input surface vertices but some internal triangles are not kept.
Is there a way to conserve internal surfaces of non-manifold volumes in mmg3d? Or is it possible to set as required some faces of tetrahedra (for instance tetrahedra which are adjacent to the internal surfaces in my case)? How is it possible to do this ?
Thank you very much.