Hello,
I generated a prismatic mesh from a surface mesh patch.
Not all the elements are prisms (the major part is): the algorithm generates a small number of tets and pyramids, as usual.
Once (quasi) prismatic mesh is done, i would lilke to remesh the tetrahedral mesh connected to that, since some tets are very stretched. I would like to use mmg3D (as library).
I know experiments, and from:
that
“Mmg preserves the prisms entities but it doesn’t re-mesh it : it re-meshes the tetrahedral part of the mesh and preserves the interface with the prisms entities. This feature is useful for example if your initial mesh contains a prismatic boundary layer.”
however, unfortunately, as stated in
“Mmg doesn’t allow to preserve pyramids. Since the version [5.4.1] of Mmg you can provide and preserve “orphan points”, i.e. points that are not connected to the mesh if you specify these points as required […]”
Now, after the (quasi) prismatic mesh has been generated, I would like to preserve it during an overall re-meshing process, and this is possible only if the prismatic mesh is really fully prismatic (no pyramid inside).
Question:
- when inizialiting the mesh, could I use
MMG3D_Set_prism
for a pyramid, by => defining <= is a degenerated prism?
- will mmg3D “jump” over this degenerate prism == pyramid during remeshing and preserve it?
The same question for a tetrahedron initially belonging to the (quasi) prismatic mesh: could this be defined as a degenerated prism, so that mmg3D jumps over it and preserve it?
Grazie mille
Giovanni