X-Git-Url: http://git.salome-platform.org/gitweb/?p=modules%2Fsmesh.git;a=blobdiff_plain;f=doc%2Fsalome%2Fgui%2FSMESH%2Finput%2Fabout_meshes.doc;h=b58293d6a5291de936c80e6acb6d3cea5c344b0e;hp=14b7a54413234968436d9dc87fb7a4693727c8ca;hb=5c5e1f2368ca2b3388f657ae028b2a6b5ce8ae36;hpb=b8f76a6e3fc33d70c79b0052682a71f3e899964e

diff --git a/doc/salome/gui/SMESH/input/about_meshes.doc b/doc/salome/gui/SMESH/input/about_meshes.doc
index 14b7a5441..b58293d6a 100644
--- a/doc/salome/gui/SMESH/input/about_meshes.doc
+++ b/doc/salome/gui/SMESH/input/about_meshes.doc
@@ -3,14 +3,19 @@
 \page about_meshes_page About meshes
 
 \n \b MESH represents a discrete approximation of a subset of the
-three-dimensional space by \ref mesh_entities "elementary geometrical elements".
+three-dimensional space by \ref mesh_entities "elementary geometrical
+elements".
+
+A SALOME study can contain multiple meshes, but they do not
+implicitly compose one super-mesh, and finally each of them
+can be used (e.g. exported) only individually.
 
 Mesh module provides several ways to create the mesh:
 <ul>
   <li>The main way is to \subpage constructing_meshes_page "construct the mesh" 
     on the basis of the geometrical shape produced in the Geometry
     module. This way implies selection of 
-    - a geometrical object (<em> main shape</em>) and
+    - a geometrical object (<em>main shape</em>) and
     - <em>meshing parameters</em> (\ref
       basic_meshing_algos_page "meshing algorithms" and
     characteristics (e.g. element size) of a
@@ -19,7 +24,7 @@ Mesh module provides several ways to create the mesh:
 
     Construction of \subpage constructing_submeshes_page "sub-meshes"
     allows to discretize some sub-shapes of the main shape, for example a face,
-    using the meshing parameters that differ from those for other sub-shapes.<br>
+    using the meshing parameters that differ from those used for other sub-shapes.<br>
     Meshing parameters of meshes and sub-meshes can be 
     \subpage editing_meshes_page "edited". (Upon edition only mesh entities
     generated using changed meshing parameters are removed and will be
@@ -30,20 +35,20 @@ Mesh module provides several ways to create the mesh:
   </li>
   <li>Bottom-up way, using \ref modifying_meshes_page "mesh modification"
     operations, especially \ref extrusion_page "extrusion" and \ref
-    revolution_page "revolution". To create an empty mesh not based on a
+    revolution_page "revolution". To create an empty mesh not based on
     geometry, use the same dialog as to \ref constructing_meshes_page
-    "construct the mesh on geometry" but do not specify a geometry
-    or a meshing algorithm.
+    "construct the mesh on geometry" but specify neither the geometry
+    nor meshing algorithms.
   </li>
   <li>The mesh can be \subpage importing_exporting_meshes_page "imported" from
     (and exported to) the file in MED, UNV, STL, CGNS, DAT, GMF and
     SAUVE formats.
   </li>
-  <li>The 3D mesh can be generated from the 2D mesh, \ref
-    importing_exporting_meshes_page "imported" or manually created. To
-    setup the meshing parameters of a mesh not based on a geometry, just
-    invoke \ref editing_meshes_page "Edit mesh / sub-mesh" command on
-    your 3D mesh.
+  <li>The 3D mesh can be generated from the 2D mesh not based on geometry,
+    which was either \ref importing_exporting_meshes_page "imported" or created in
+    other way. To setup the meshing parameters of a mesh not based on geometry,
+    just invoke \ref editing_meshes_page "Edit mesh / sub-mesh" command on
+    your 2D mesh.
   </li>
   <li>Several meshes can be \subpage building_compounds_page "combined"
     into a new mesh.
@@ -67,10 +72,9 @@ Attractive meshing capabilities include:
 
 The \b structure of a SALOME mesh is described by nodes and elements based on
 these nodes. The geometry of an element is defined by the sequence of
-nodes constituting it and
-the <a href="http://www.code-aster.org/outils/med/html/connectivites.html">
-  connectivity convention </a> (adopted from MED library). Definition of
-the element basing on the elements of a lower dimension is NOT supported.
+nodes constituting it and the \ref connectivity_page "connectivity convention"
+(adopted from MED library). Definition of the element basing on the elements
+of a lower dimension is NOT supported.
 
 \anchor mesh_entities
 The mesh can include the following entities:
@@ -84,8 +88,8 @@ The mesh can include the following entities:
 <li>\b Volume &mdash; 3D mesh element representing a part of 3D
   space bound by volume facets. Nodes of a volume describing each
   facet are defined by
-  the <a href="http://www.code-aster.org/outils/med/html/connectivites.html">
-  MED connectivity convention.</a> A volume can be a tetrahedron, hexahedron,
+  the \subpage connectivity_page "connectivity convention".
+  A volume can be a tetrahedron, hexahedron,
   pentahedron, pyramid, hexagonal prism or polyhedron.</li>
 <li>\b 0D element &mdash; mesh element defined by one node.</li>
 <li>\b Ball element &mdash; discrete mesh element defined by a
@@ -95,15 +99,21 @@ The mesh can include the following entities:
 Every mesh entity has an attribute associating it to a sub-shape it is
 generated on (if any). The node generated on the geometrical edge or
 surface in addition stores its position in parametric space of the
-associated geometrical entity.
+associated geometrical entity. This attribute is set up by meshing
+algorithms generating elements and nodes.
+
+Mesh entities are identified by integer IDs starting from 1.
+Nodes and elements are counted separately, i.e. there can be a node
+and element with the same ID.
 
 SALOME supports elements of second order, without a central node
-(quadratic triangle, quadrangle, tetrahedron, hexahedron, pentahedron
-and pyramid) and with central nodes (bi-quadratic triangle and
-quadrangle and tri-quadratic hexahedron).<br>
-Quadratic mesh can be obtained in two ways:
+(quadratic triangle, quadrangle, polygon, tetrahedron, hexahedron,
+pentahedron and pyramid) and with central nodes (bi-quadratic triangle
+and quadrangle and tri-quadratic hexahedron).<br>
+Quadratic mesh can be obtained in three ways:
 - Using a global \ref quadratic_mesh_anchor "Quadratic Mesh"
 hypothesis. (Elements with the central node are not generated in this way).
 - Using \ref convert_to_from_quadratic_mesh_page operation.
-
+- Using an appropriate option of some meshing algorithms, which
+generate elements of several dimensions starting from mesh segments.
 */