/*! \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. */