/*! \page uniting_set_of_triangles_page Uniting a set of triangles \n In contrast to the previous operation this one allows to unite at once many triangles if they have adjacent edges. To union several triangles:
  1. Display a mesh or a submesh in the 3D viewer.
  2. In the \b Modification menu select the Union of triangles item or click "Union of triangles" button in the toolbar. \image html image80.png
    "Union of triangles" button
    The following dialog box will appear: \image html a-unionoftriangles.png
  3. Click the \b Apply or Apply and Close button to confirm the operation.
If some selected triangle elements have no adjacent edges with one of the others, the operation on these elements shall take no effect. \image html uniting_a_set_of_triangles1.png "The chosen triangles" \image html uniting_a_set_of_triangles2.png "The union of several triangles - several quadrangular cells are created"
See Also a sample TUI Script of a \ref tui_uniting_set_of_triangles "Uniting a Set of Triangles" operation. */