3 \page constructing_submeshes_page Constructing sub-meshes
5 Sub-mesh is a mesh on a geometrical sub-object created with algorithms
6 and/or hypotheses other than the algorithms and hypotheses assigned to
7 the parent mesh on the parent object.
9 If a geometrical sub-object belongs to several geometrical objects
10 having different meshes or sub-meshes, it will be meshed with the
11 hypotheses of a sub-mesh of a lower dimension.<br>
12 For example, a face of a box is meshed with a sub-mesh using algorithms
13 and hypotheses other than the parent mesh on the whole box. The face
14 and the box share four edges, which will be meshed with algorithms and
15 hypotheses of the sub-mesh on the face, because the face is a 2D object
16 while the box is a 3D object. <br>
17 If the dimensions are the same, an arbitrary algorithm/hypothesis
18 will be used. This means that an edge shared by two faces each having
19 its own different sub-mesh, will be meshed using algorithms and
20 hypotheses of any of the two, chosen randomly. This indeterminacy can
21 be fixed by defining \ref submesh_order_anchor "Sub-mesh priority".
24 \n Construction of a sub-mesh consists of:
26 <li>Selecting a mesh which will encapsulate your sub-mesh</li>
27 <li>Selecting a geometrical object for meshing</li>
28 <li>Applying one or several previously described
29 \ref about_hypo_page "hypotheses" and
30 \ref basic_meshing_algos_page "meshing algorithms" which will be used
31 at computation of this sub-mesh</li>
34 <br><em>To construct a sub-mesh:</em>
36 From the \b Mesh menu select <b>Create Sub-mesh</b> or click <em>"Create
37 Sum-mesh"</em> button in the toolbar.
40 \image html image33.gif
41 <em>"Create Sub-mesh" button</em>
45 The following dialog box will appear:
48 \image html createmesh-inv2.png
51 It allows to define the \b Name, the parent \b Mesh and the \b
52 Geometry (e.g. a face if the parent mesh has been built on box) of the
53 sub-mesh. You can define algorithms and hypotheses in the same way as
54 in \ref constructing_meshes_page "Create mesh" menu.
57 If the parent mesh is already computed, then you can define
58 \b Geometry by picking mesh elements computed on a sub-shape of interest
59 in the 3D Viewer, i.e. you don't have to extract this sub-shape
60 previously in Geometry module. To start element selection, press \a
61 Selection button to the right of \b Geometry label. If this button is
62 already down, then click it to release and then click it again. The
63 following pop-up menu to choose a way of geometry definition will
67 \image html choose_geom_selection_way.png
70 There the first item enables selecting the sub-shape in the Object
71 Browser, the second one makes appear the following dialog.
74 \image html find_geom_by_mesh_elem.png
77 In this dialog, <b> Element Type </b> defines kind of element to pick in the
78 Viewer. Instead of picking an element in the Viewer, you can type its
79 ID in <b> Element ID</b> field. <b> Geometry name </b> allow you
80 define a name of the sub-shape with which it will be published in the Study.
84 In the Object Browser the structure of the new sub-mesh will be
87 \image html image10.jpg
92 <li>a reference to the geometrical object on the basis of which the sub-mesh has been constructed;</li>
93 <li><b>Applied hypotheses</b> folder containing the references to the
94 hypotheses applied to the construction of the sub-mesh;</li>
95 <li><b>Applied algorithms</b> folder containing the references to the
96 algorithms applied to the construction of the sub-mesh.</li>
99 <br><b>See Also</b> a sample TUI Script of a
100 \ref tui_construction_submesh "Construct Sub-mesh" operation.