3 \page merging_nodes_page Merging nodes
5 This functionality allows user to detect groups of coincident nodes
6 with specified tolerance; each group of the coincident nodes can be
7 then converted to the single node.
9 \image html mergenodes_ico.png "Merge nodes menu button"
11 <em>To merge nodes of your mesh:</em>
13 <li>Choose \b Modification -> \b Transformation -> <b>Merge nodes</b>
14 menu item. The following dialog box shall appear:</li>
16 \image html mergenodes_auto.png
19 <li>\b Name is the name of the mesh whose nodes will be merged.</li>
20 <li>\b Automatic or \b Manual mode allows choosing how the nodes are
21 processed. In \b Manual mode you can adjust groups of coincident nodes
22 detected by the program and/or select any nodes to be merged.</li>
23 <li>\b Tolerance is a maximum distance between nodes sufficient for
25 <li>Activation of <b>No merge of corner and medium nodes of quadratic
26 cells</b> check-box prevents merging medium nodes of quadratic
27 elements with corner nodes. This check-box is enabled provided
28 that the selected mesh includes quadratic elements.</li>
29 <li>Activation of <b>Avoid making holes</b> check-box prevents merging
30 nodes that make elements invalid (but not degenerated) and hence
31 removed. Thus, no holes in place of removed elements appear. </li>
32 <li><b>Exclude groups from detection</b> group allows to ignore the
33 nodes which belong to the specified mesh groups. This control is
34 active provided that the mesh includes groups.</li>
35 <li><b>Nodes to keep during the merge</b> group allows to specify
36 nodes to keep in the mesh. (By default a node being the first in a
37 group of coincident nodes is kept.) It is possible to either select
38 nodes in the Viewer or select groups of any element type whose nodes
41 <li>\a Selection button activates selection of nodes to keep.</li>
42 <li><b>Nodes</b> button activates selection of nodes in the
44 <li><b>Groups and sub-meshes</b> button activates selection of
45 groups and sub-meshes.</li>
46 <li>\b Add button adds selected nodes or groups to the list.</li>
47 <li> Nodes or groups selected in the list can be removed using \b
53 <li><b>Automatic mode:</b>
56 <li>In the \b Automatic Mode all nodes within the indicated tolerance
57 will be merged. The nodes which belong to the groups specified in
58 <b>Exclude groups from detection</b> will NOT be taken into account.</li>
61 <li> The \b Manual mode gives you full control of what the operation will do.
62 In this mode additional controls are available:
64 <li>\b Detect button generates the list of coincident nodes for the given
66 <li><b>Coincident nodes</b> is a list of groups of nodes for
67 merging. Upon \b Apply all nodes of each group will
68 be united into one node. The first node of a group is kept and
69 the others are removed. By default the first node has a lowest ID
72 <li>\b Remove button deletes the selected group from the list.</li>
73 <li>\b Add button adds to the list a group of nodes selected in the
75 <li><b>Select all</b> check-box selects all groups.</li>
76 <li><b>Show double nodes IDs</b> check-box shows/hides identifiers of
77 nodes of selected groups in the 3D viewer.</li>
81 \image html mergenodes.png
84 <li><b>Edit selected group of coincident nodes</b> list allows
85 editing the selected group:
88 <center>adds to the group the nodes selected in the viewer.</center>
90 \image html remove.png
91 <center>removes from the group the selected nodes.</center>
94 <center>moves the selected node to the first position in the
95 group in order to keep it in the mesh.</center><br>
99 <li>To confirm your choice click \b Apply or <b>Apply and Close</b> button.</li>
102 \image html merging_nodes1.png
103 <center> The initial object. Nodes 25, 26 and 5 are added to <b>Nodes
104 to keep during the merge</b> group.
107 \image html merging_nodes2.png
108 <center> The object has been merged
111 <br><b>See Also</b> a sample TUI Script of a
112 \ref tui_merging_nodes "Merge Nodes" operation.