/*! \page uniting_two_triangles_page Uniting two triangles \n In MESH you can union two neighboring triangles by deletion of the common edge. To unite two triangles:
  1. From the \b Modification menu choose the Union of two triangles item or click "Union of two triangles" button in the tool-bar. \image html image71.png
    "Union of two triangles" button
    The following dialog box shall appear: \image html unionoftwotriangles.png
  2. Enter IDs of nodes forming the required edge in the \b Edge field (a couple of node IDs separated by a dash) or select this edge in the 3D viewer.
  3. Click the \b Apply or Apply and Close button.
\image html uniting_two_triangles1.png "The selected triangles" \image html uniting_two_triangles2.png "The union of two triangles"
See Also a sample TUI Script of a \ref tui_uniting_two_triangles "Uniting Two Triangles" operation. */