\section mesh_general General information
-The MESH class is dedicated to the handling of unstructured meshes. Two classes derive from it : MESHING supplies functions for creating meshes from scratch (c.f. \ref meshing), while GRID gives specific constructors for creating structured meshes.
+The MESH class is dedicated to the handling of unstructured
+meshes. Class MESHING deriving from it supplies functions for creating meshes from scratch (c.f. \ref meshing).
\section mesh_connectivity Content of the connectivity array
Underlying the unstructured meshes is the notion of connectivity. This section only covers meshes made out of standard elements, the \c MED_POLYGON and \c MED_POLYHEDRA case being detailed in section \ref polygon .
\image html connectivity_arrays_small.png "Nodal connectivity storage scheme"
\image latex connectivity_arrays_small.eps "Nodal connectivity storage scheme"
-In MEDMEM, an unstructured mesh nodal connectivity is defined with these arrays (if the mesh has no MED_POLYGON and MED_POLYHEDRA element) :
-- the type array, which contains the number of cells for each present type
-- the nodal connectivity array containing the connectivity of each cell, all cells being sorted by type,
-- the connectivity index array, which indicates the beginning of each cell in the connectivity array,
+In MEDMEM, an unstructured mesh nodal connectivity is defined with these arrays:
+- the type array, which contains the number of cells for each present type;
+- the nodal connectivity array containing the connectivity of each cell, all cells being sorted by type;
+- the connectivity index array, which indicates the beginning of each cell in the connectivity array.
-The cell types are ordered by their number of nodes.
+The cell types are ordered by their number of nodes; MED_POLYGON and
+MED_POLYHEDRA is always the last type, if present.
As an example, let us consider a mesh made out of a linear triangle, two linear quadrangles and a quadratic triangle (c.f. figure \ref fig_connectivity_example ).
\image html connectivity_example_small.png "Example for mesh connectivity"
- Connectivity information methods are described in \ref MESH_connectivity.
- The methods retrieving family information are given in \ref MESH_families.
- The IO methods are given in \ref MESH_io.
-- The methods for an advanced usage (applying algorithms to meshes) are given in \ref MESH_advanced.
+- The methods for an advanced usage (applying algorithms to meshes)
+are given in \ref MESH_advanced.
*/
