\page extrusion_page Extrusion
\n Extrusion is used to build mesh elements of plus one
-dimension than the input ones. Any line or planar element can be
-extruded. Line elements will extrude into quadrilateral plane elements.
-Triangular and Quadrilateral plane elements extrude into Pentahedron
-and Hexahedron solids respectively.
+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.
-\image html image91.gif
-<center><em>"Extrusion" button</em></center>
+<center>
+\image html image91.png
+<em>"Extrusion" button</em>
+</center>
-The following dialog box will appear:
+The following dialog common for line and planar elements will appear:
\image html extrusionalongaline1.png
\image html extrusionalongaline2.png
+
</li>
-<li>In this dialog box you should select:
+<li>In this dialog:
<ul>
-<li>the type of elements which will be extruded (1D or 2D),</li>
-<li>specify the IDs of the elements which will be extruded by
-selecting them in the 3D viewer or select the whole mesh or
-submesh,</li>
-<li>specify the vector along which the elements will be extruded,</li>
-<li>number of steps.</li>
+ <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
+ by pattern "<old group name>_extruded" and "<old group name>_top".</li>
</ul>
-<li> <b>Generate Groups</b> checkbox allows copying the groups of
-elements of the source mesh to the newly created one. </li>
-</li>
-<li>Click the \b Apply or \b OK button.</li>
+<li>Click \b Apply or <b> Apply and Close</b> button to confirm the operation.</li>
</ol>
-\image html image77.jpg
+\image html image77.jpg "The mesh with an edge selected for extrusion"
-\image html image76.jpg
+\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.
