/*!

\page union_faces_operation_page Union Faces

This operation unites on a given shape all faces sharing the same surface. 

To <b>Union Faces</b> in the <b>Main Menu</b> select <b>Repair - > Union Faces</b>.

\image html union_faces.png

In this dialog: 
- Click on the "Arrow" button and select in the Object Browser or in the viewer one or more \b Shapes (compounds or single solids).
- If necessary, activate \ref restore_presentation_parameters_page "Advanced Transformation Options".
- Click \b Apply or <b>Apply and Close</b> button.

This operation can be also launched using a <b>TUI Command:</b> <em>geompy.UnionFaces(theShape)</em>,
where <em>theShape</em> is a compound or a single solid.

<b>Example:</b>

\image html union_faces1.png
<center><em>Shape with not united faces</em></center>

\image html union_faces2.png
<center><em>Improved shape</em></center>

Our <b>TUI Scripts</b> provide you with useful examples of the
\ref swig_UnionFaces "Union Faces" functionality usage.

*/