On Wed, 18 Aug 2010, Alberto Chapchap wrote:

> I am particular interested in generating a cube (box) meshed with
> quadrilaterals

See the MeshGeneration::build_square function that's used in some of
the libMesh examples.

> and then manipulate it (translate the nodes  preserving the
> conectivity

Look at the mesh_modification.C source code for some helper functions
that may do what you want or that may guide you to writing your own
manipulation routines.

> or creating a new mesh).

If you want to create a mesh from scratch, see the mesh_generation.C
source code for some example routines.
---
Roy

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