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Mesh.rst
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**************
GooseFEM::Mesh
**************
.. note::
Source:
.. code-block:: cpp
#include <GooseFEM/Mesh.h>
``GooseFEM::Mesh::dofs``
========================
Get a sequential list of DOF-numbers for each vector-component of each node.
.. code-block:: cpp
MatS GooseFEM::Mesh::dofs ( size_t nnode , size_t ndim )
For example for 3 nodes in 2 dimensions the output is
.. math::
\begin{bmatrix}
0 & 1 \\
2 & 3 \\
4 & 5
\end{bmatrix}
``GooseFEM::Mesh::renumber``
============================
* Renumber indices to lowest possible indices (returns a copy, input not modified).
.. code-block:: cpp
MatS GooseFEM::Mesh::renumber ( const MatS &in )
For example:
.. math::
\begin{bmatrix}
0 & 1 \\
0 & 1 \\
5 & 4
\end{bmatrix}
is renumbered to
.. math::
\begin{bmatrix}
0 & 1 \\
0 & 1 \\
3 & 2
\end{bmatrix}
* Reorder indices such that some items are at the beginning or the end (returns a copy, input not modified).
.. code-block:: cpp
MatS GooseFEM::Mesh::renumber ( const MatS &in , const ColS &idx, std::string location="end" );
For example:
.. math::
\mathrm{in} =
\begin{bmatrix}
0 & 1 \\
0 & 1 \\
3 & 2 \\
4 & 5
\end{bmatrix}
with
.. math::
\mathrm{idx} =
\begin{bmatrix}
6 & 4
\end{bmatrix}
Implies that ``in`` is renumbered such that the 6th item becomes the one-before-last item (:math:`5 \rightarrow 4`), and the 4th item become the last (:math:`3 \rightarrow 5`). The remaining items are renumbered to the lowest index while keeping the same order. The result:
.. math::
\begin{bmatrix}
0 & 1 \\
0 & 1 \\
5 & 2 \\
4 & 3
\end{bmatrix}
Consider also [:download:`source: figures/Mesh/renumber.cpp <figures/Mesh/renumber.cpp>`]

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