53061: "Clear mesh data" removes too many (if !HasShapeToMesh())

[modules/smesh.git] / doc / salome / gui / SMESH / input / about_meshes.doc

diff --git a/doc/salome/gui/SMESH/input/about_meshes.doc b/doc/salome/gui/SMESH/input/about_meshes.doc
index 7550e893495c187f75e969a7f1c20f72e2f9d6eb..621a47e990cd5cb5febd22133da91b94cdafbd3d 100644 (file)
--- 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
 \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 
 
 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
     - <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,
 
     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
     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


@@ -39,7 +44,7 @@ Mesh module provides several ways to create the mesh:
     (and exported to) the file in MED, UNV, STL, CGNS, DAT, GMF and
     SAUVE formats.
   </li>
     (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
+  <li>The 3D mesh can be generated from the 2D mesh, which was \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
     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


@@ -98,16 +103,17 @@ surface in addition stores its position in parametric space of the
 associated geometrical entity.
 
 Mesh entities are identified by integer IDs starting from 1.
 associated geometrical entity.
 
 Mesh entities are identified by integer IDs starting from 1.

-Nodes and elements are countered separately, i.e. there can be a node
+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, polygon, tetrahedron, hexahedron,
 pentahedron and pyramid) and with central nodes (bi-quadratic triangle
 and quadrangle and tri-quadratic hexahedron).<br>
 and element with the same ID.
 
 SALOME supports elements of second order, without a central node
 (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 two ways:
+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 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.

 */
 */