\n This geometrical operation allows to perform a symmetrical copy of
your mesh or some of its elements.
-<em>To create a symmetrical copy of the mesh:</em>
+<em>To create a symmetrical copy:</em>
<ol>
<li>From the \b Modification menu choose \b Transformation -> \b Symmetry item or click
One of the following dialogs will appear:
It is possible to mirror a mesh or some of its elements through:
-\image html symmetry1.png "a point (defined by a point and a vector)"
-\image html symmetry2.png "an axis"
+\image html symmetry1.png "a point" <br>
+\image html symmetry2.png "an axis" <br>
\image html symmetry3.png "a plane (defined by a point and a normal to the plane)"
</li>
<li>In the dialog:
<ul>
-<li>specify the IDs of the elements for the symmetry operation:
+<li>specify the elements for the symmetry operation:
<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>
+<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
+ \ref filtering_elements "filter" to the selection of elements.</li>
</ul>
</li>
<li>depending on the nature of the mirror object:
<ul>
<li>if the mesh is mirrored through a point, specify the coordinates
-of the point</li>
+ of the point, either directly or by picking a mesh node;</li>
<li>if the mesh is mirrored through an axis:
<ul>
-<li>specify the cooordinates of the start \b Point of the axis vector;</li>
-<li>specify the axis \b Vector through the coordinates of its
-end point with respect to the coordinates of the start point;</li>
+<li>specify the coordinates of the start \b Point of the axis, either
+ directly or by picking a mesh node;</li>
+<li>specify the components of axis \b Vector, either directly or by
+ picking a mesh node, in which case \b Vector is defined as a shift
+ between the \b Point and the node;</li>
</ul>
</li>
<li>if the mesh is mirrored through a plane:
<ul>
-<li>specify the cooordinates of the \b Point lying on the plane;</li>
-<li>specify the axis \b Vector through the coordinates of its
-end point with respect to the coordinates of the start point.</li>
+<li>specify the cooordinates of the \b Point lying on the plane,
+ either directly or by picking a mesh node;</li>
+<li>specify the components of plane \b Normal, either directly or by
+ picking a mesh node, in which case \b Normal is defined as a shift
+ between the \b Point and the node.</li>
</ul>
</li>
<li>specify the conditions of symmetry operation:
<ul>
-<li>activate <b>Move elements</b> radio button to create the source
-mesh (or elements) at the new location and erase it from the previous location;</li>
-<li>activate <b>Copy elements</b> radio button to create the source
-mesh (or elements) at the new location, but leave it at the previous
-location, the source mesh will be considered one and single mesh with the result of the rotation;</li>
-<li>activate <b>Create as new mesh</b> radio button to leave the
-source mesh (or elements) at its previous location and create a new
-mesh at the new location, the new mesh appears in the Object Browser
-with the default name MeshName_rotated (it is possible to change this
-name in the adjacent box);</li>
-<li>activate <b> Copy groups </b> checkbox to copy the groups of elements of the source mesh to the newly created mesh.</li>
+<li>activate <b>Move elements</b> radio button to change location of
+ the selected elements within the current mesh;</li>
+<li>activate <b>Copy elements</b> radio button to duplicate the
+ selected elements at the new location within the current mesh;</li>
+<li>activate <b>Create as new mesh</b> radio button to create new
+ element in a new mesh; the new mesh appears in the Object Browser
+ with the default name MeshName_mirrored (it is possible to change
+ this name in the adjacent box);</li>
+<li>activate <b> Copy groups </b> checkbox to put new mesh enities
+ into new groups if source entities belongs to some groups. New
+ groups are named by pattern "<old group name>_mirrored".</li>
</ul>
</li>
</ul>
-<li>activate <b>Preview</b> checkbox to show the result of transformation in the viewer </li>
+<li>activate <b>Preview</b> checkbox to show the result of
+ transformation in the viewer;</li>
<li>click \b Apply or <b> Apply and Close</b> button to confirm the
-operation.</li>
+ operation.</li>
</ul>
</ol>
