smesh/doc/salome/gui/SMESH/input/constructing_submeshes.doc

109 lines
3.8 KiB
Plaintext
Raw Normal View History

/*!
2012-08-09 16:03:55 +06:00
\page constructing_submeshes_page Constructing sub-meshes
Sub-mesh is a mesh on a geometrical sub-object created with meshing algorithms
2009-02-17 10:27:49 +05:00
and/or hypotheses other than the algorithms and hypotheses assigned to
2013-02-12 20:37:44 +06:00
the parent mesh on the parent geometrical object.
2012-08-09 16:03:55 +06:00
If a geometrical sub-object belongs to several geometrical objects
having different meshes or sub-meshes, it will be meshed with the
hypotheses of a sub-mesh of a lower dimension.<br>
For example, a face of a box is meshed with a sub-mesh using algorithms
2009-02-17 10:27:49 +05:00
and hypotheses other than the parent mesh on the whole box. The face
and the box share four edges, which will be meshed with algorithms and
2012-08-09 16:03:55 +06:00
hypotheses of the sub-mesh on the face, because the face is a 2D object
2009-02-17 10:27:49 +05:00
while the box is a 3D object. <br>
If the dimensions are the same, an arbitrary algorithm/hypothesis
will be used. This means that an edge shared by two faces each having
2012-08-09 16:03:55 +06:00
its own different sub-mesh, will be meshed using algorithms and
hypotheses of any of the two, chosen randomly. This indeterminacy can
2012-12-13 17:41:29 +06:00
be fixed by defining \ref submesh_order_anchor "Sub-mesh priority". The
default sub-meshes priority is such that multi-dimensional algorithms
are processed first.
2012-08-09 16:03:55 +06:00
<br>
2009-02-17 10:27:49 +05:00
2012-08-09 16:03:55 +06:00
\n Construction of a sub-mesh consists of:
<ul>
2012-08-09 16:03:55 +06:00
<li>Selecting a mesh which will encapsulate your sub-mesh</li>
<li>Selecting a geometrical object for meshing</li>
<li>Applying one or several previously described
\ref about_hypo_page "hypotheses" and
\ref basic_meshing_algos_page "meshing algorithms" which will be used
2012-08-09 16:03:55 +06:00
at computation of this sub-mesh</li>
</ul>
2012-08-09 16:03:55 +06:00
<br><em>To construct a sub-mesh:</em>
\par
2012-08-09 16:03:55 +06:00
From the \b Mesh menu select <b>Create Sub-mesh</b> or click <em>"Create
Sum-mesh"</em> button in the toolbar.
2012-10-08 17:56:59 +06:00
<center>
\image html image33.gif
<em>"Create Sub-mesh" button</em>
</center>
\par
The following dialog box will appear:
2012-10-08 17:56:59 +06:00
\par
\image html createmesh-inv2.png
\par
It allows to define the \b Name, the parent \b Mesh and the \b
Geometry (e.g. a face if the parent mesh has been built on box) of the
sub-mesh. You can select meshing algorithms and hypotheses in the same way as
in \ref constructing_meshes_page "Create mesh" menu.
2012-10-08 17:56:59 +06:00
\par
2012-12-13 17:41:29 +06:00
If the parent mesh is already computed, then you can define the
2012-10-08 17:56:59 +06:00
\b Geometry by picking mesh elements computed on a sub-shape of interest
2012-12-13 17:41:29 +06:00
in the 3D Viewer, i.e. you do not have to extract this sub-shape
in Geometry module beforehand. To start element selection, press \a
2012-10-08 17:56:59 +06:00
Selection button to the right of \b Geometry label. If this button is
already down, then click it to release and then click it again. The
2012-12-13 17:41:29 +06:00
following pop-up menu allowing to choose a way of geometry definition will
2012-10-08 17:56:59 +06:00
appear.
\par
\image html choose_geom_selection_way.png
\par
2012-12-13 17:41:29 +06:00
<b>Direct geometry selection</b> enables selecting the sub-shape in the Object
Browser.
<b>Find geometry by mesh element selection</b> activates the following dialog.
2012-10-08 17:56:59 +06:00
\par
\image html find_geom_by_mesh_elem.png
\par
In this dialog, <b> Element Type </b> defines kind of element to pick in the
2012-12-13 17:41:29 +06:00
Viewer.
Instead of picking an element in the Viewer, you can type its
ID in <b> Element ID</b> field.
<b> Geometry name </b> field allows defining a name of the sub-shape.
2012-10-08 17:56:59 +06:00
\par
2012-08-09 16:03:55 +06:00
In the Object Browser the structure of the new sub-mesh will be
displayed as follows:
\image html image10.jpg
\par
It contains:
<ul>
<li>a sub-mesh name (\a SubMeshFace1)
<li>a reference to the geometrical object on the basis of which the
sub-mesh has been constructed (<em>Cylindrical Face_1</em>);</li>
<li><b>Applied hypotheses</b> folder containing the references to the
hypotheses selected at the construction of the sub-mesh;</li>
<li><b>Applied algorithms</b> folder containing the references to the
algorithms selected at the construction of the sub-mesh.</li>
</ul>
<br><b>See Also</b> a sample TUI Script of a
2012-08-09 16:03:55 +06:00
\ref tui_construction_submesh "Construct Sub-mesh" operation.
*/