+++ /dev/null
-/*!
-
-\page grouping_elements_page Grouping elements
-
-In Mesh module it is possible to create groups of mesh entities:
-nodes, edges, faces, volumes, 0D elements or balls. One group contains
-elements of only one type. Groups, unlike sub-meshes, are exported
-along with mesh entities into the files of following formats: MED, UNV,
-and CGNS. The group has a color attribute which is used for
-visualization only and is not exported.
-
-There are three types of groups different by their internal
-organization:<ol>
-<li><b>Standalone group</b> is a static set of mesh entities. Its
- contents can be explicitly controlled by the user. Upon removal of
- the entities included into the group, e.g. due to modification of
- meshing parameter, the group becomes empty and its content can be
- restored only manually. Hence it is reasonable to create standalone
- groups when the mesh generation is finished and mesh quality is
- verified.
- \warning Creation and edition of large standalone groups in
- \ref creating_groups_page "Create group" dialog using manual edition
- is problematic due to poor performance of the dialog.</li>
-
-<li><b>Group on geometry</b> is associated to a sub-shape or a group of
- sub-shapes of the main shape and includes mesh entities generated on
- these geometrical entities. The association to a geometry is
- established at group construction and cannot be changed. The group
- contents are always updated automatically, hence the
- group can be created even before mesh elements generation.</li>
-<li><b>Group on filter</b> encapsulates a \ref filters_page "filter",
- which is used to select mesh entities composing the group from the
- whole mesh. Criteria of the filter can be changed at any time. The
- group contents are always updated automatically, hence the group can
- be created even before mesh elements generation.</li>
-</ol>
-The group on geometry and group on filter can be converted to
-a standalone group.
-
-\image html groups_in_OB.png "Groups of different types look differently in the Object Browser"
-
-The following ways of group creation are possible:
-
-- \subpage creating_groups_page "Create group" dialog allows creation of
- a group of any type:
- \ref standalone_group "Standalone group",
- \ref group_on_geom "Group on geometry" and
- \ref group_on_filter "Group on filter" using dedicated tabs.
-- \subpage create_groups_from_geometry_page "Create Groups from Geometry"
- dialog allows creation of several groups on geometry at once.
-- Standalone groups of all nodes and elements of the chosen sub-mesh
- (type of elements depends on dimension of sub-mesh geometry) can
- be created using <b>Mesh -> Construct Group</b> menu item (available
- from the context menu as well).
-- Standalone groups of any element type can be created basing on nodes
- of other groups - using \subpage group_of_underlying_elements_page
- "Group based on nodes of other groups" dialog.
-- Standalone groups can be created by applying
- \subpage using_operations_on_groups_page "Boolean operations" to
- other groups.
-- Creation of standalone groups is an option of many
- \ref modifying_meshes_page "mesh modification" operations.
-
-The created groups can be later:
-
-- \subpage editing_groups_page "Edited"
-- \subpage deleting_groups_page "Deleted", either as an object or
- together with contained elements.
-- The group on geometry and group on filter can be
- \ref convert_to_standalone "converted into the standalone" group.
-- \ref importing_exporting_meshes_page "Exported" into a file as a
- whole mesh.
-
-In the Object Browser, if an item contains more than one child group,
-it is possible to sort the groups by name in ascending order
-using <b>Sort children</b> context menu item.
-
-\image html smesh_sort_groups.png "Sorting groups"
-
-An important tool, providing filters for creation of standalone
-groups and groups on filter is \ref selection_filter_library_page.
-
-*/
