In class Mesh/ParMesh:
* Move the serial implementation of UniformRefinement3D to a new
method: UniformRefinement3D_base. The implementations of the virtual
method UniformRefinement3D (which now have no parameters) use the
new UniformRefinement3D_base method.
* In UniformRefinement3D_base, implemented two algorithms for choosing
how to split the middle octahedron when refining a tetrahedron by
cutting off its four corner tets. (These four tets have the same
shape as the original tet and half the edge-length.) The choice of
the algorithm is hard-coded in a const variable for now.
* Add an optional parameter to UniformRefinement which is used to
choose how to refine tet-only meshes: the default choice is to use
the new algorithm defined by UniformRefinement3D; the second option
is to use the old default - call LocalRefinement (marking all
elements) to perform 3 levels of bisection. The new algorithm
always produces elements with better shape (aspect ratio) than the
old default (at least for the meshes in the data/ directory and a
few other meshes).
* Make the method Finalize virtual - its implementation in parallel
requires updates in the ParMesh data.
* Add a consistency check in ParMesh::ReorientTetMesh that verifies
the assumption made in the method about the update of the shared
triangles.
* Simplify implementation of some methods in class ParMesh by
separating common code in a new protected method: FinalizeParTopo.
Other updates:
* In the examples and miniapps, when using a tet-only mesh which is
first refined uniformly and then locally, it is now necessary to
call the method Mesh::Finalize(true) (which is now virtual) in order
to mark the elements for local refinement after the uniform
refinement.
* In example 12p, use better random seed values.
* In examples 3/3p, add a sample run with order=2 on a tet mesh - this
will test the methods {Mesh,ParMesh}::ReorientTetMesh. Previously,
these were only tested by one sample run in example 4p.
* In the mesh-explorer miniapp, add a refinement option to perform
uniform refinement of tet-only meshes using bisection.
* In the MFEM_LOCATION macro print the <file> and <line> location
using a standard format: <file>:<line>, as used by most compilers
when reporting warnings and errors.
* Remove FIXME comments about mesh format v1.0.1.
Tzanio Kolev