+ <li>Select a geometrical object for meshing.</li>
+ <li>In the \b Mesh menu select <b>Create Mesh</b> or click <em>"Create
+ Mesh"</em> button in the toolbar.
+
+ <center>
+ \image html image32.png
+ <em>"Create Mesh" button</em>
+ </center>
+
+ The following dialog box will appear:
+
+ \image html createmesh-inv.png
+ <br>
+ </li>
+ <li>Apply \subpage basic_meshing_algos_page "meshing algorithms" and
+ \subpage about_hypo_page "hypotheses" which will be used at computation of
+ this mesh.
+
+ "Create mesh" dialog box contains several tab pages titled \b 3D,
+ \b 2D, \b 1D and \b 0D. The title of each page reflects the
+ dimension of the CAD model (geometry) the algorithms listed on
+ this page affect. For example, \b 3D page lists the algorithms
+ that affect 3D geometrical objects (solids).
+
+ \note
+ - Some page(s) can be disabled if the source geometrical
+ object does not include shapes (sub-shapes) of the corresponding
+ dimension(s). For example, if the input object is a geometrical face,
+ \b 3D page is disabled.
+ - Some algorithms affect the geometry of several dimensions,
+ i.e. "1D-2D" or "1D-2D-3D". If such an algorithm is selected by the
+ user, the dialog box pages related to the corresponding lower level
+ dimensions are disabled.
+ - \b 0D page does not refer to the 0D elements, but to 0D
+ geometry (vertices). Mesh module does not provide algorithms that
+ produce 0D elements. Currently \b 0D page provides only one
+ algorithm "Segments around vertex" that allows specyfying the required
+ size of mesh edges about the selected vertex (or vertices).
+
+ For example, you need to mesh a 3D object.
+
+ First, type the name of your mesh in the \b Name box, by default,
+ it is "Mesh_1". Then select the geometrical object you wish to
+ mesh in the Object Browser and click "Select" button near \b Geometry
+ field (if the name of the object has not yet appeared in \b Geometry field).
+
+ <center>
+ \image html image120.png
+ <em>"Select" button</em>
+ </center>
+
+ Now you can define 3D Algorithm and 3D Hypotheses, which will be
+ applied to the solids of your geometrical object. Click the <em>"Add
+ Hypothesis"</em> button to add a hypothesis.
+
+ <center>
+ \image html image121.png
+ <em>"Add Hypothesis" button</em>
+ </center>
+
+ Click the <em>"Edit Hypothesis"</em> button to change the values for the
+ current hypothesis.
+
+ <center>
+ \image html image122.png
+ <em>"Edit Hypothesis" button</em>
+ </center>
+
+ Most standard 2D and 3D algorithms can work without hypotheses
+ using some default parameters. The use of additional hypotheses
+ is optional (i.e. you may leave "None" in this box).
+
+ Proceed in the same way with 2D and 1D Algorithms and Hypotheses that
+ will be used to mesh faces and edges of your geometry. (Note
+ that any object has edges, even if their existence is not
+ apparent, for example, a sphere has 4 edges). Note that the
+ choice of hypotheses and lower dimension algorithms depends on
+ the higher dimension algorithm.
+
+ Some algorithms generate mesh of several dimensions, while others
+ produce mesh of only one dimension. In the latter case there must
+ be one Algorithm and zero or several
+ Hypotheses for each dimension of your object, otherwise you will
+ not get any mesh at all. Of course, if you wish to mesh a face,
+ which is a 2D object, you do not need to define a 3D Algorithm and
+ Hypotheses.
+
+ In the <b>Object Browser</b> the structure of the new mesh will be
+ displayed as follows:
+
+ <center>
+ \image html image88.jpg
+ </center>
+
+ It contains:
+ <ul>
+ <li>a reference to the geometrical object on the basis of
+ which the mesh has been constructed;</li>
+ <li><b>Applied hypotheses</b> folder containing the references
+ to the hypotheses applied at the construction of the mesh;</li>
+ <li><b>Applied algorithms</b> folder containing the references
+ to the algorithms applied at the construction of the mesh.</li>
+ </ul>
+
+ There is an alternative way to assign Algorithms and Hypotheses by
+ clicking <b>Assign a set of hypotheses</b> button and selecting among
+ pre-defined sets of hypotheses. In addition to the standard
+ sets of hypotheses, it is possible to create custom sets by editing
+ CustomMeshers.xml file located in the home directory. CustomMeshers.xml
+ file must describe sets of hypotheses in the
+ same way as ${SMESH_ROOT_DIR}/share/salome/resources/smesh/StdMeshers.xml
+ file does (sets of hypotheses are enclosed between <hypotheses-set-group>
+ tags).
+
+ \image html hypo_sets.png
+ List of sets of hypotheses. Tag <em>[custom]</em> is
+ automatically added to the sets defined by the user
+ </li>
+</ol>
+
+Consider trying a sample script for construction of a mesh from our
+\ref tui_creating_meshes_page "TUI Scripts" section.
+
+\anchor evaluate_anchor
+<h2>Evaluating mesh size</h2>
+
+After the mesh object is created and all hypotheses are assigned and
+before \ref compute_anchor "Compute" operation, it is possible to
+calculate the eventual mesh size. For this, select the mesh in
+the <b>Object Browser</b> and from the \b Mesh menu select \b
+Evaluate. The result of evaluation will be displayed in the following
+information box:
+
+\image html mesh_evaluation_succeed.png
+
+\anchor preview_anchor
+<h2>Previewing the mesh</h2>
