\page constructing_submeshes_page Constructing sub-meshes
+\tableofcontents
+
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.
sub-shapes.
Creation of a sub-mesh allows to control individually meshing of a
-certain sub-shape, thus allowing to get mesh locally coarser or finer, to get
-elements of different types in the same mesh etc.
+certain sub-shape, thus to get a locally coarser or finer mesh, to get
+elements of different types in the same mesh, etc.
+
+\section 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: <ul>
dialog showing \ref meshing_failed_anchor "meshing errors".</li>
</ul>
+\section 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:
<ul>
-<li> the \b edge it-self</li>
+<li> the \b edge itself</li>
<li> <b>groups of edges</b> containing the edge, if any</li>
<li> \b wires sharing the edge</li>
<li> \b faces sharing the edge</li>
<li> <b>groups of solids</b> sharing the edge, if any</li>
<li> the <b>main shape</b></li>
</ul>
-(This sequence of sub-shapes defines priority of sub-meshes. Thus more
+(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 an 1D algorithm is found the search stops and the same
-sequence of sub-shapes is checked to find a main and additional 1D
-hypotheses the found 1D algorithm can take into account.
+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 higher priority than
-uni-dimensional algorithms if they are assigned to sub-meshes of the
+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
+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 submesh_order_anchor "change" mutual
priority of such concurrent sub-meshes.
+\section submesh_definition How to construct a sub-mesh
\n Construction of a sub-mesh consists of:
<ul>
-<li>Selecting a mesh which will encapsulate your sub-mesh</li>
+<li>Selecting a mesh which will encapsulate the sub-mesh</li>
<li>Selecting a sub-shape for meshing</li>
<li>Applying one or several
\ref about_hypo_page "hypotheses" and
\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 define meshing algorithms and hypotheses in the same way as
-in \ref constructing_meshes_page "Create mesh" dialog.
+in \ref constructing_meshes_page "Create mesh" dialog.
+
+Later you can change the applied hypotheses or their parameters in
+\ref editing_meshes_page "Edit mesh/sub-mesh" dialog. Mesh entities
+generated using changed hypotheses are automatically removed.
-\par
\anchor subshape_by_mesh_elem
If the parent mesh is already computed, then you can define the
\b Geometry by picking mesh elements computed on a sub-shape of interest
following pop-up menu allowing to choose a way of geometry definition will
appear.
-\par
\image html choose_geom_selection_way.png
-\par
<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.
-\par
\image html find_geom_by_mesh_elem.png
-\par
In this dialog, <b> Element Type </b> defines a kind of element to pick in the
Viewer.
Instead of picking an element in the Viewer, you can type its
with which the sub-shape will appear in the Object Browser (if not yet
there).
-\par
+\section 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 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>
+<li><em>Applied hypotheses</em> folder containing references to
+hypotheses assigned to the sub-mesh;</li>
+<li><em>Applied algorithms</em> folder containing references to
+algorithms assigned to the sub-mesh.</li>
</ul>
<br><b>See Also</b> a sample TUI Script of a
