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

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/*!
\page extrusion_page Extrusion
\n Extrusion is used to build mesh elements of plus one
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dimension than the input ones. Any node, segment or 2D element can be
extruded. Each type of elements has a corresponding type of extruded elements:
<table>
<tr><td><b>Extruded element</b></td><td><b> Result elements </b></td></tr>
<tr><td>Node </td><td> Segments </td></tr>
<tr><td>Segment </td><td> Quadrilaterals </td></tr>
<tr><td>Triangle </td><td> Pentahedrons </td></tr>
<tr><td>Quadrilateral </td><td> Hexahedrons </td></tr>
<tr><td>Polygon </td><td> Polyhedrons </td></tr>
<tr><td>Hexagonal polygon </td><td> Hexagonal prism </td></tr>
</table>
<em>To use extrusion:</em>
<ol>
<li>From the \b Modification menu choose the \b Extrusion item or click
<em>"Extrusion"</em> button in the toolbar.
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<center>
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\image html image91.png
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<em>"Extrusion" button</em>
</center>
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The following dialog common for line and planar elements will appear:
\image html extrusionalongaline1.png
\image html extrusionalongaline2.png
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</li>
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<li>In this dialog:
<ul>
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<li>Select the type of elements which will be extruded (0D, 1D or 2D).</li>
<li>Specify the IDs of the elements which will be extruded by one
following means:
<ul>
<li><b>Select the whole mesh, submesh or group</b> activating this
checkbox.</li>
<li>Choose mesh elements with the mouse in the 3D Viewer. It is
possible to select a whole area with a mouse frame.</li>
<li>Input the element IDs directly in <b>ID Elements</b>
field. The selected elements will be highlighted in the viewer.</li>
<li>Apply Filters. <b>Set filter</b> button allows to apply a
filter to the selection of elements. See more about filters in
the \ref filtering_elements "Selection filters" page.</li>
</ul>
</li>
<li>If the <b>Extrude to Distance</b> radio button is selected</li>
<ul>
<li>specify the distance at which the elements will be extruded.</li>
</ul>
<li>If the <b>Extrude Along Vector</b> radio button is selected</li>
<ul>
<li>specify the coordinates of the vector along which the elements
will be extruded, or select the face (the normal to the face will
define the vector),</li>
<li>specify the distance of extrusion along the vector.</li>
</ul>
<li>Specify the number of steps.</li>
<li>If you activate <b>Generate Groups</b> check-box, the created
elements contained in groups will be included into new groups named
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by pattern "<old group name>_extruded" and "<old group name>_top".</li>
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</ul>
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<li>Click \b Apply or <b> Apply and Close</b> button to confirm the operation.</li>
</ol>
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\image html image77.jpg "The mesh with an edge selected for extrusion"
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\image html image76.jpg "The mesh with extruded edge"
<br><b>See Also</b> a sample TUI Script of an
\ref tui_extrusion "Extrusion" operation.
*/