smesh/doc/salome/gui/SMESH/input/merging_nodes.doc

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/*!
\page merging_nodes_page Merging nodes
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This functionality allows user to detect groups of coincident nodes
with specified tolerance; each group of the coincident nodes can be
then converted to the single node.
\image html mergenodes_ico.png "Merge nodes menu button"
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<em>To merge nodes of your mesh:</em>
<ol>
<li>Choose \b Modification -> \b Transformation -> <b>Merge nodes</b>
menu item. The following dialog box shall appear:</li>
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<br>
\image html mergenodes_auto.png
<br>
<ul>
<li>\b Name is the name of the mesh whose nodes will be merged.</li>
<li>\b Automatic or \b Manual mode allows choosing how the nodes are
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processed.
<li>\b Tolerance is a maximum distance between nodes sufficient for
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merging.</li>
<li><b>Exclude Groups</b> group box allows to ignore the nodes which
belong to the specified mesh groups.
</ul>
<li><b>Automatic mode:</b>
<br>
<ul>
<li>In the \b Automatic Mode all Nodes within the indicated tolerance
will be merged. The nodes which belong to the groups specified in the
<b>Exclude Groups</b> will be not taken into account.</li>
</ul>
</li><br>
<li> The \b Manual mode gives you full control of what the operation will do.
In this mode additional controls are available:
<ul>
<li>\b Detect button generates the list of coincident nodes for the given
\b Tolerance.</li>
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<li><b>Coincident nodes</b> is a list of groups of nodes for
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merging. After the operation all nodes of each group will
be united into one node. The first node of a group is kept and
the others are removed.
<ul>
<li>\b Remove button deletes the selected group from the list.</li>
<li>\b Add button adds to the list a group of nodes selected in the
viewer with pressed "Shift" key.</li>
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<li><b>Select all</b> check-box selects all groups.</li>
<li><b>Show double nodes IDs</b> check-box shows/hides identifiers of
nodes of selected groups in the 3D viewer.</li>
</ul>
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<br>
\image html mergenodes.png
<br>
</li>
<li><b>Edit selected group</b> list allows editing the selected
group:
<br><br>
\image html add.png
<center>adds to the group the nodes selected in the viewer.</center>
<br>
\image html remove.png
<center>removes from the group the selected nodes.</center>
<br>
\image html sort.png
<center>moves the selected node to the first position in the
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group in order to keep it in the mesh.</center><br>
</li>
</ul>
</li>
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<li>To confirm your choice click \b Apply or <b>Apply and Close</b> button.</li>
</ol>
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\image html merging_nodes1.png "The initial object"
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\image html merging_nodes2.png "The object has been merged with a very big tolerance"
<br><b>See Also</b> a sample TUI Script of a
\ref tui_merging_nodes "Merge Nodes" operation.
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*/