\page creating_groups_page Creating groups
-\n In MESH you can create groups of elements of different types. To
-create a group of elements in the \b Mesh menu select <b>Create
-Group</b>.
-\n To create any group you should define the following:
+\n In MESH you can create a group of elements of a certain type. The
+contents of the group can be defined in different ways. To create a group, in the \b
+Mesh menu select <b>Create Group</b> item (also available in the
+context menu of the mesh).<br>
+To create a group of any type you should define the following:
<ul>
-<li><b>Mesh</b> - the name of the mesh whose elements will form your
+<li><b>Mesh</b> - the mesh whose elements will form your
group. You can select your mesh in the Objet Browser or in the 3D
viewer.</li>
<li><b>Elements Type</b> - set of radio buttons allows to select the type of
elements which will form your group:</li>
<ul>
<li><b>Nodes</b></li>
+<li><b>0D Element</b></li>
+<li><b>Ball</b></li>
<li><b>Edges</b></li>
<li><b>Faces</b></li>
<li><b>Volumes</b></li>
</ul>
<li><b>Name</b> field allows to enter the name of your new group.</li>
+<li><b>Color</b> - allows to assign to the group a certain color, for
+example, defining boundary conditions. The chosen color is used to
+display the elements of the group. The color attribute of the group is
+not persistent, it is lost if you save and then load the study from
+the file.</li>
</ul>
-SALOME Platform distinguishes between the two Group types:
-<b>Standalone Group</b> and <b>Group on Geometry</b>.
+SALOME Platform distinguishes between the three Group types:
+<b>Standalone Group</b>, <b>Group on Geometry</b> and <b>Group on Filter</b>.
-<br><h2>Standalone Group</h2>
+\anchor standalone_group <br><h2>"Standalone Group"</h2>
-<b>Standalone Group</b> consists of mesh elements, which you can define in
-two possible ways.
+<b>Standalone Group</b> contains a list of mesh elements, which you can define in
+the following ways:
<ul>
-<li>Choosing them manually with the mouse in the 3D Viewer. You can
-click on an element in the 3D viewer and it will be highlighted. After
-that click the \b Add button and the ID of this element will be added to
-the list.</li>
-<li>Applying Filters. The <b>Set filter</b> button allows to apply a
-definite filter to selection of the elements of your group. See more
-about filters on the
-\ref selection_filter_library_page "Selection filter library" page.</li>
+<li>By adding all entities of the chosen type existing in the
+ mesh. For this, turn on the <b>Select All</b> check box. In this mode
+ all controls, which allow selecting the entities in other ways, are
+ disabled.</li>
+<li>By choosing entities manually with the mouse in the 3D Viewer. For
+ this, turn on the <b>Enable manual edition</b> check box. You can
+ click on an element in the 3D viewer and it will be highlighted. After
+ that click the \b Add button and the ID of this element will be
+ added to the list.<br>
+ The <b>Set filter</b> button allows to define the filter for
+ selection of the elements for your group. See more about filters on
+ the \ref selection_filter_library_page "Selection filter library"
+ page.</li>
+<li>By adding entities from either a sub-mesh or an existing
+ group. For this, turn on the <b>Enable manual edition</b> check
+ box. <b>Select from</b> set of fields allows to select a sub-mesh or
+ a group of the appropriate type.</li>
+</ul>
+In the <b>manual edition</b> mode you can
+<ul>
+<li>click the \b Remove button to remove the selected items from
+ the list.</li>
+<li>click the <b>Sort List</b> button to sort the list of IDs of
+ mesh elements.</li>
</ul>
-To remove a selected element or elements from the list click the
-\b Remove button. The <b>Sort List</b> button allows to sort the list of IDs of
-mesh elements.
-\n <b>Select from</b> set of fields allows to choose a submesh or an existing
-group whose elements of the previously defined type will be added to
-the list of elements which will form your group.
-\n <b>Color Number</b> (integer only, ranging from 0 to 9999) - allows to
-assign to the group a certain index, for example, defining boundary
-conditions. This feature introduces a useful element of preprocessing
-in Mesh module. Note that <b>Color number</b> attribute has nothing to do
-with the colors used for the display of the elements of the group.
\image html creategroup.png
+
+For example, to create a new group containing all faces of an
+existing group and some other faces selected in the viewer:
+<ul>
+<li> Select the \b Face type of entities and input the name of the new group.</li>
+<li> Check the \b Group checkbox in <b>Select From</b> group.</li>
+<li> Select the existing group of faces in the object browser or in the viewer</li>
+<li> Click \b Add in \b Content group. <b>Id Elements</b> list will be filled
+with IDs of faces belonging to the exising group.</li>
+<li> Select other faces in the viewer.</li>
+<li> Click \b Add in \b Content group.</li>
+<li> Click \b Apply button to create the new group.</li>
+</ul>
+
+Please note that the new group does not have references to the source
+group. It contains only the list of face IDs. So if the source group
+is changed, the new one is not updated accordingly.
+
+
\image html image130.gif
-<center>In this picture the brown cells belong to a group defined manually.</center>
+<center>In this picture the brown cells belong to a group defined
+ manually.</center>
\image html image131.gif
-<center>In this picture the brown cells belong to the group defined by the criterion
-<b>Taper > 0</b>.</center>
+<center>In this picture the brown cells belong to the group defined by
+ the criterion <b>Taper > 0</b>.</center>
<b>See Also</b> a sample TUI Script of a
\ref tui_create_standalone_group "Create a Standalone Group"
operation.
-<br><h2>Group on Geometry</h2>
-To create a group on geometry check <b>Group on geometry</b> in the \b Group
-\b type field. <b>Group on geometry</b> contains the elements of a certain type
-belonging to the selected geometrical object. To define a group select
-in the Objet Browser or in the 3D viewer a geometrical object from
-which the elements will be taken. After confirmation of the operation
-a new group of mesh elements will be created.
+\anchor group_on_geom <br><h2>"Group on Geometry"</h2>
+
+To create a group on geometry check <b>Group on geometry</b> in the \b
+Group \b type field. The group on geometry contains the elements
+of a certain type generated on the selected geometrical object. Group
+contents are dynamically updated if the mesh is modified.<br>
+To define a group, select in the Objet Browser or in the 3D viewer a
+geometrical object from which the elements will be taken. After
+confirmation of the operation a new group of mesh elements will be
+created.
\image html a-creategroup.png
\image html image132.gif
-<center>In this picture the cells which belong to a certain face are
-selected in green.</center>
+<center>In this picture the cells which belong to a certain
+ geometrical face are selected in green.</center>
<b>See Also</b> a sample TUI Script of a
\ref tui_create_group_on_geometry "Create a Group on Geometry"
operation.
-*/
\ No newline at end of file
+
+\anchor group_on_filter <br><h2>"Group on Filter"</h2>
+
+To create a group on filter check <b>Group on filter</b> in the <b>
+Group type</b> field. The group on filter contains the elements
+of a certain type satisfying the defined filter. Group contents are
+dynamically updated if the mesh is modified.<br> To define a group,
+click the <b>Set filter</b> button and define criteria of the
+filter in the opened dialog. After confirmation of the operation a
+new group of mesh elements will be created. See more about filters on
+the \ref selection_filter_library_page "Selection filter library" page.
+
+\image html creategroup_on_filter.png
+
+<b>See Also</b> a sample TUI Script of a
+\ref tui_create_group_on_filter "Create a Group on Filter" operation.
+
+*/
