Used to derive shapefunctions of lower order for example
as needed for pressure given displacement shape functions
in HydroMechanics process.

The elements' dimensions (DIM and NPOINTS) are declared
'unsigned' is the MeshLib (MeshElement::dimension and
MeshElement::n_all_nodes) and should be of the same
type for the shape functions.

The Eigen alignment is not used anywhere else and so far the code runs fine w/o
this alignment.
Between the decisions to add Eigen alignment for all Eigen-containing structs
and containers or remove completely the latter is easier.

Dmitri Naumov authored 9 years ago and Dmitri Naumov committed 8 years ago

Mainly correct variable names in the documentation.
Remove some documentation for non-existing parameters.

now it is harder to use them incorrectly

This is replaced long time ago by a three argument
constructor taking also the global dimension in
account.

Currently Eigen-3.2.5 can store Nx1 matrices only
in column major form.

0xM fixed Eigen matrices lead to 0-size arrays which
cause compilation errors (e.g. on MSVC++)