\page revolution_page Revolution
-\n Revolution is a type of surface meshing by generation from
-discretized lines. It is used to build mesh elements of plus one
-dimension than the swept ones. Each swept 1D element produces one or
-more quadrangles (or triangles if one node of a rotated element lays
-on the revolution axis).
+\n Revolution is used to build mesh elements of plus one
+dimension than the input ones. Boundary elements around generated
+mesh of plus one dimension are additionally created. All created
+elements can be automatically grouped. Revolution can be used to create
+a \ref extrusion_struct "structured mesh from scratch".
<em>To apply revolution:</em>
<ol>
-<li>From the \b Modification menu choose the \b Revolution item or click
-<em>"Revolution"</em> button in the toolbar.
+ <li>From the \b Modification menu choose the \b Revolution item or click
+ <em>"Revolution"</em> button in the toolbar.
\image html image92.png
<center><em>"Revolution" button</em></center>
\image html revolution1.png
-</li>
-
-<li>
-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:
-
-
-<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>
-
+ </li>
+
+ <li>In this dialog:
+ <ul>
+ <li>Use \a Selection button to specify what you are going to
+ select at a given moment, \b Nodes, \b Edges or \b Faces.
+\image html image120.png
+<center><em>"Selection" button</em></center>
+ </li>
+ <li>Specify \b Nodes, \b Edges and \b Faces, which will be revolved, by one
+ of following means:
+ <ul>
+ <li><b>Select the whole mesh, sub-mesh 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>Node IDs</b>, <b>Edge
+ IDs</b> and <b>Face IDs</b> fields. The selected elements will
+ be highlighted in the viewer, if the mesh is shown there.</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>Specify the \b Axis of revolution:
+ <ul>
+ <li>Specify the cooordinates of the start \b Point of the
+ axis of revolution; either directly or by picking a node
+ in the Viewer (selection of nodes is activated as you click
+ the \a Selection button).</li>
+ <li>Specify the \b Vector of the axis in either of three ways:
+ <ul>
+ <li>directly adjust vector components;</li>
+ <li>click \a Selection button, chose <em>From Origin to
+ selected Point</em> in the opened menu and pick a node
+ in the Viewer; </li>
+ <li>click \a Selection button, chose <em>Normal to
+ selected Face</em> in the opened menu and pick a mesh
+ face in the Viewer.</li>
+ </ul></ul>
+ </li>
+ <li>Specify the \b Angle of revolution and the <b>Number of
+ steps </b> of revolution,
+ <ul>
+ <li> <b>Angle by Step</b> - the elements are revolved 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)
\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>
-
+ </li>
+ <li> <b>Total Angle</b> - the elements are revolved 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 revolved by 30/2=15 degrees twice for a
+ total of 30).
\image html revolutionsn1.png "Example of Revolution with Total Angle"
-
-</ul>
-</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 \b Apply or <b> Apply and Close</b> button to confirm the
-operation.</li>
+ </li>
+ </ul>
+ </li>
+ <li>Specify the \b Tolerance for the operation, which is used to
+ detect nodes lying on the axis of revolution.
+ </li>
+ <li>Activate <b>Preview</b> check-box to see the result mesh in
+ the viewer.
+ </li>
+ <li>If you activate <b>Generate Groups</b> check-box, the <em>result elements</em>
+ created from <em>selected elements</em> contained in groups will be
+ included into new groups named by pattern "<old group
+ name>_rotated" and "<old group name>_top". For example if a
+ selected quadrangle is included in \a g_Faces group (see figures
+ below) then result hexahedra will be included in \a
+ g_Faces_rotated group and a quadrangle created at the "top" of
+ revolved mesh will be included in \a g_Faces_top group. <br>
+\image html extrusion_groups.png
+\image html extrusion_groups_res.png
+ <p> This check-box is active only if there are some groups in the mesh.
+ </li>
+ </ul>
+ </li>
+
+ <li>Click \b Apply or <b> Apply and Close</b> button to confirm the
+ operation.</li>
</ol>
-
-<br><b>See Also</b> a sample TUI Script of a
+<br><b>See Also</b> a sample TUI Script of a
\ref tui_revolution "Revolution" operation.
*/
