/*!

\page building_compounds_page Building Compounds

\n Compound Mesh is a combination of several meshes.

<em>To Build a compound:</em>

\par
From the \b Mesh menu select <b>Build Compound</b> or click <em>"Build
Compound Mesh"</em> button in the toolbar.

\image html image161.png
<center><em>"Build Compound Mesh" button</em></center>

\par
The following dialog box will appear:

\image html buildcompound.png

\par
<ul>
<li>\b Name - allows selecting the name of the resulting \b Compound.</li>
<li>\b Meshes - allows selecting the meshes which will be
concatenated. They can be chosen in the Object Browser while holding
\b Ctrl button.</li>
<li><b>Processing identical groups</b> - allows selecting the method
of processing the namesake existing on the united meshes.
\n They can be either</li>
<ul>
<li>\b United - all elements of Group1 on Mesh_1 and Group1 on Mesh_2
become the elements of Group1 on the Compound_Mesh, or</li>
<li>\b Renamed - Group1 on Mesh_1 becomes Group1_1 and Group1 on Mesh_2
becomes Group1_2. See \ref grouping_elements_page "Creating Groups"
for more information about groups.</li>
</ul>
<li><b>Create common groups for initial meshes</b> checkbox permits to
automatically create groups of all elements of the same type
(nodes, edges, faces and volumes) for the resulting mesh from the
elements
of the initial meshes.
</li>
<li>You can simply unite meshes or choose to <b>Merge coincident nodes
and elements</b>, in which case it is possible to define the \b Tolerance
for this operation.</li>
</ul>

\image html image160.gif "Example of a compound of two meshed cubes"

<b>See Also</b> a sample 
\ref tui_building_compound "TUI Example of building compounds."
*/