\page about_meshes_page About meshes
\n \b MESH represents a discretization of a geometrical CAD model into
-a set of entities with a simple topology. In MESH there are two
-options of creation of meshes, you can:
+a set of entities with a simple topology.
-<ul>
-<li>generate meshes on the basis of geometrical shapes produced in the GEOM module,</li>
-<li>create your own meshes using the MESH functions destined for modification of generated meshes.</li>
-</ul>
+Meshes are stored in DAT, MED, UNV, STL, CGNS and SAUVE formats and can be
+\subpage importing_exporting_meshes_page "imported from and exported to"
+ the file in these formats.
+
+It is possible to \subpage constructing_meshes_page "construct meshes"
+on the basis of geometrical shapes produced in the GEOM module.
+It is also possible to \subpage constructing_submeshes_page "mesh on a part of the geometrical object",
+for example, a face, with different meshing parameters than the whole mesh.
+
+Several created meshes can be \subpage building_compounds_page "combined into another mesh".
+
+The whole mesh or it's part can be \subpage copy_mesh_page "copied" into another mesh.
+
+Meshing parameters of meshes and sub-meshes can be
+\subpage editing_meshes_page "edited", then only a path of mesh
+depending on changed parameters will be re-computed.
+
+Meshes can be edited using the MESH functions destined for
+\ref modifying_meshes_page "modification" of generated meshes.
-The topology of a mesh is described by the relationships between its
+The \b topology of a mesh is described by the relationships between its
entities including:
<ul>
<li>\b Node — 0D object of a mesh presented by a point with coordinates (x, y, z).</li>
+<li>\b 0D element — element of a mesh defined by one node.</li>
<li>\b Edge — 1D element of a mesh defined by two nodes.</li>
<li>\b Face — 2D element of a mesh defined by three or four edges (closed contour).</li>
<li>\b Volume — 3D element of a mesh defined by several faces.</li>
+<li>\b Ball element — discrete element of a mesh defined by a node and a diameter.</li>
</ul>
These entities are
considered as topological entities and they don't
imply any geometric representation. Only \b Nodes reference geometric
representations of points with definite coordinates. The node entity
-will contain additional information about its position in the space
+contains additional information about its position in the space
and its relations with the meshed CAD model. Its position could be
described in the following way:
<ul>
-<li><b>2D position</b>. It is a free position defined by only two coordinates x,y.</li>
-<li><b>3D position</b>. It is a free position defined by three coordinates x,y and z. </li>
+<li><b>3D position</b>. It characterizes the position of a node in a
+ solid geometry and is defined by three coordinates x,y and z and a
+ reference to the solid geometrical entity. </li>
<li><b>Surface position</b>. It characterizes the position of a node on a
-geometric surface and is defined by the u,v position in the parametric
-space of the corresponding surface.</li>
+ geometric surface and is defined by the u,v position in the parametric
+ space of the corresponding surface.</li>
<li><b>Line position</b>. It characterizes the position of a node on a
-geometric curve and is defined by the u parameter and the
-corresponding curve.</li>
+ geometric curve and is defined by the u parameter and the
+ corresponding curve.</li>
<li><b>Vertex position</b>. It characterizes the position of a node on a
-geometric point of the meshed CAD model and is defined by the x,y,z
-coordinates of the corresponding vertex.</li>
+ geometric point of the meshed CAD model and is defined by the x,y,z
+ coordinates of the corresponding vertex.</li>
</ul>
<br><h2>Connections</h2>
