<li>From the \b Modification menu choose the \b Revolution item or click
<em>"Revolution"</em> button in the toolbar.
-\image html image92.gif
+\image html image92.png
<center><em>"Revolution" button</em></center>
-The following dialog box shall appear:
+The following dialog common for line and planar elements will appear:
\image html revolution1.png
-\image html revolution2.png
</li>
<li>
-In this dialog box you should specify:
+In this dialog you should specify:
<ul>
<li>the type of elements which will be extruded (1D or 2D),</li>
-<li>specify the IDs of the elements which will be revolved by
-selecting them in the 3D viewer or select the whole mesh or
-submesh,</li>
-<li>specify the axis (point and vector) around which the elements will
-be revolved,</li>
-<li>angle of rotation,</li>
-<li>number of steps,</li>
-<li>tolerance of rotation</li>
+<li>specify the IDs of the elements which will be revolved:
+
+
+<ul>
+<li><b>Select the whole mesh, submesh or group</b> activating this
+checkbox; or</li>
+<li>choose mesh elements with the mouse in the 3D Viewer. It is
+possible to select a whole area with a mouse frame; or</li>
+<li>input the element IDs directly in <b>ID Elements</b> field. The selected elements will be highlighted in the
+viewer; or</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 selection_filter_library_page "Selection filter library" page.</li>
+</ul>
+</li>
+
+<li>specify the axis of revolution:
+<ul>
+<li>specify the cooordinates of the start \b Point of the vector of revolution;</li>
+<li>specify the \b Vector of revolution through the coordinates of its
+end point with respect to the coordinates of the start
+point. Alternatively, it is possible to specify the vector through the
+normal to the selected face.</li>
+</ul>
+</li>
+
+<li>specify the angle of revolution and the number of revolution steps,</li>
+<ul> <li> Angle by Step - the elements are extruded by the specified angle at each step (i.e. for Angle=30 and Number of Steps=2, the elements will be extruded
+ by 30 degrees twice for a total of 30*2=60)</li>
+
+\image html revolutionsn2.png "Example of Revolution with Angle by Step"
+
+<li> Total Angle - the elements are extruded by the specified angle only once and the number of steps defines the number of iterations
+(i.e.for Angle=30 and Number of Steps=2, the elements will be extruded by 30/2=15 degrees twice for a total of 30). </li>
+
+\image html revolutionsn1.png "Example of Revolution with Total Angle"
+
</ul>
-<li> <b>Generate Groups</b> checkbox allows copying the groups of
+</li>
+
+<li>specify the tolerance for the operation</li>
+
+<li>activate <b>Preview</b> checkbox to show the parameter-setting in the viewer </li>
+<li>activate <b>Generate Groups</b> checkbox to copy the groups of
elements of the source mesh to the newly created one. </li>
</li>
+</ul>
-<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 image78.jpg
<br><b>See Also</b> a sample TUI Script of a
\ref tui_revolution "Revolution" operation.
-*/
\ No newline at end of file
+*/
