+++ /dev/null
-.. _constructing_submeshes_page:
-
-***********************
-Constructing sub-meshes
-***********************
-
-.. contents:: `Table of contents`
-
-What the sub-mesh is for
-########################
-
-By purpose, the sub-mesh is an object used to assign to a sub-shape
-different meshing parameters than those assigned to the main shape.
-
-Structurally, the sub-mesh is a mesh on a certain sub-shape, or a group of
-sub-shapes, possibly generated using different meshing algorithms
-and/or hypotheses than those used to generate the mesh on other
-sub-shapes. Elements generated on a sub-shape can be retrieved without
-explicit creation of a sub-mesh by creating a *Group on Geometry* using
-:ref:`Create Groups from Geometry <create_groups_from_geometry_page>` dialog.
-
-Creation of a sub-mesh allows to control individually meshing of a
-certain sub-shape, thus to get a locally coarser or finer mesh, to get
-elements of different types in the same mesh, etc.
-
-A sub-mesh can be meshed individually. To achieve this, select a
-sub-mesh and either invoke **Compute Sub-mesh** vai the contextual
-menu in the Object Browser or invoke **Mesh > Compute** menu.
-
-.. _submesh_shape_section:
-
-How to get a sub-shape for sub-mesh construction
-################################################
-
-A sub-shape to create a sub-mesh on should be retrieved from the main shape
-in one of the following ways:
-
-* In Geometry module, via **New Entity > Explode** menu.
-* In Geometry module, by creation of a group (**New Entity > Group > Create Group** menu).
-* In Mesh module, by :ref:`selecting a mesh element <subshape_by_mesh_elem>` generated on a sub-shape of interest. This way is accessible if the mesh is already computed.
-* In Mesh module, by clicking **Publish Sub-shape** button in a dialog showing :ref:`meshing errors <meshing_failed_anchor>`.
-
-
-.. _submesh_priority:
-
-How hypotheses are selected among sub-meshes
-############################################
-
-Internally, definition of meshing parameters to apply for
-discretization of a certain sub-shape, for example an edge of a
-compound of solids, starts from searching an algorithm, 1D as for the
-edge. The following sub-shapes are sequentially checked for presence
-of a sub-mesh where 1D algorithm is assigned:
-
-* the **edge** itself
-* **groups of edges** containing the edge, if any
-* **wires** sharing the edge
-* **faces** sharing the edge
-* **groups of faces** sharing the edge, if any
-* **shells** sharing the edge
-* **solids** sharing the edge
-* **groups of solids** sharing the edge, if any
-* the **main shape**
-
-(This sequence of sub-shapes defines the **priority** of sub-meshes. Thus more
-local, i.e. assigned to sub-shape of lower dimension, algorithms and
-hypotheses have higher priority during the search of hypotheses to
-apply.)
-
-As soon as a 1D algorithm is found, the search stops and the same
-sequence of sub-shapes is checked to find the main and additional 1D
-hypotheses, which can be taken into account by the found 1D algorithm.
-
-The multi-dimensional algorithms have a higher priority than
-uni-dimensional ones if they are assigned to sub-meshes of the
-same priority.
-
-If meshing parameters are defined on sub-meshes of the same priority,
-for example, different 1D hypotheses are assigned to two faces sharing
-an edge, the hypothesis assigned to a sub-shape with a lower ID will
-be used for meshing. You can :ref:`change <submesh_order_anchor>` mutual
-priority of such concurrent sub-meshes.
-
-.. _submesh_definition:
-
-How to construct a sub-mesh
-###########################
-
-Construction of a sub-mesh consists of:
-
-* Selecting a mesh which will encapsulate the sub-mesh.
-* Selecting a sub-shape for meshing.
-* Selecting a :ref:`meshing algorithm <basic_meshing_algos_page>` which will be used for discretization of this sub-shape.
-* Creating or selecting one or several :ref:`hypotheses <about_hypo_page>`.
-
-
-*To construct a sub-mesh:*
-
-.. |img| image:: ../images/image33.gif
-
-From the **Mesh** menu select **Create Sub-mesh** or click *"Create Sum-mesh"* button |img| in the toolbar.
-
-The following dialog box will appear:
-
- .. image:: ../images/createmesh-inv2.png
- :align: center
-
-It allows to define the **Name**, the parent **Mesh** and the **Geometry** (e.g. a face if the parent mesh has been built on box) of the sub-mesh. You can define meshing algorithms and hypotheses in the same way as in :ref:`Create mesh <constructing_meshes_page>` dialog.
-
-Later you can change the applied hypotheses or their parameters in :ref:`Edit mesh/sub-mesh <editing_meshes_page>` dialog. Mesh entities generated using changed hypotheses are automatically removed.
-
-.. _subshape_by_mesh_elem:
-
-If the parent mesh is already computed, then you can define the **Geometry** by picking mesh elements computed on a sub-shape of interest in the 3D Viewer, i.e. you do not have to extract this sub-shape in Geometry module beforehand. To start element selection, press *Selection* button to the right of **Geometry** label. If this button is already down, then click it to release and then click it again. The following pop-up menu allowing to choose a way of geometry definition will appear.
-
-.. image:: ../images/choose_geom_selection_way.png
- :align: center
-
-**Direct geometry selection** enables selecting the sub-shape in the Object Browser.
-**Find geometry by mesh element selection** activates the following dialog.
-
-.. image:: ../images/find_geom_by_mesh_elem.png
- :align: center
-
-In this dialog, **Element Type** defines a kind of element to pick in the Viewer. Instead of picking an element in the Viewer, you can type its ID in **Element ID** field. **Geometry name** field allows defining a name of the sub-shape, with which the sub-shape will appear in the Object Browser (if not yet there).
-
-
-.. _submesh_tree:
-
-Sub-mesh in the Object Browser
-##############################
-
-In the Object Browser the structure of the new sub-mesh will be displayed as follows:
-
- .. image:: ../images/image10.jpg
- :align: center
-
-It contains:
-
-* a sub-mesh name (*SubMeshFace1*)
-* a reference to the geometrical object on the basis of which the sub-mesh has been constructed (*Cylindrical Face_1*);
-* *Applied hypotheses* folder containing references to hypotheses assigned to the sub-mesh;
-* *Applied algorithms* folder containing references to algorithms assigned to the sub-mesh.
-
-
-**See Also** a sample TUI Script of a :ref:`tui_construction_submesh` operation.
-
