A..0.0.1.1 File MESH

Before the keyword End, you have to define all the mesh characteristics: vertex, elements (triangles, quadrilaterals, tetrahedra, hexahedra...), etc. Those entities are defined as follows:

NB :The entities number begins to $1$ (and not $0$ like in C langage)


Vertices
$np$
$x_1 y_1 z_1 ref_1$
...
$x_{np} y_{np} z_{np} ref_{np}$
with $np$ the number of mesh nodes, $x_i y_i z_i$ the coordinates of vertex $i$ and $ref_i$ its reference (an integer).
NB :In dimension 2, it is just $x_i y_i ref_i$


Triangles
$nt$
$v^1_1 v^2_1 v^3_1 ref_1$
...
$v^1_{nt} v^2_{nt} v^3_{nt} ref_{nt}$
with $nt$ the number of mesh triangles, $v^j_i$ the number of vertex $j$ of triangle $i$ and $ref_i$ its reference.


Quadrilaterals
$nq$
$v^1_1 v^2_1 v^3_1 v^4_1 ref_1$
...
$v^1_{nq} v^2_{nq} v^3_{nq} v^4_{nq} ref_{nq}$
with $nq$ the number of quadrilaterals, $v^j_i$ the number of vertex $j$ of quadrilaterals $i$ and $ref_i$ its reference.


Tetrahedra
$ntet$
$v^1_1 v^2_1 v^3_1 v^4_1 ref_1$
...
$v^1_{ntet} v^2_{ntet} v^3_{ntet} v^4_{ntet} ref_{ntet}$
with $ntet$ the number of tetrahedra, $v^j_i$ the number of vertex $j$ of tetrahedron $i$ and $ref_i$ its reference.


Hexahedra
$nh$
$v^1_1 v^2_1 v^3_1 v^4_1 v^5_1 v^6_1 v^7_1 v^8_1 ref_1$
...
$v^1_{nh} v^2_{nh} v^3_{nh} v^4_{nh} v^5_{nh} v^6_{nh} v^7_{nh} v^8_{nh} ref_{nh}$
with $nh$ the number of hexahedra, $v^j_i$ the number of vertex $j$ of hexahedron $i$ and $ref_i$ its reference.


Edges
$ne$
$e^1_1 e^2_1 ref_1$
...
$e^1_{ne} e^2_{ne} ref_{ne}$
with $ne$ the number of (boundary) edges, $e^1_i e^2_i$ the numbers of the two vertex which compose the edge $i$ and $ref_i$ its reference.