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69 lines
3.3 KiB
ReStructuredText
69 lines
3.3 KiB
ReStructuredText
.. _merging_elements_page:
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****************
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Merging Elements
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****************
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This functionality allows to merge coincident elements of a mesh. Two elements are considered coincident if they are based on the same set of nodes.
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.. image:: ../images/mergeelems_ico.png
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:align: center
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.. centered::
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*"Merge elements"* menu button
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To merge elements choose in the main menu **Modification** -> **Transformation** -> **Merge elements** item. The following dialog box shall appear:
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.. image:: ../images/mergeelems_auto.png
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:align: center
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.. |ad| image:: ../images/add.png
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.. |rm| image:: ../images/remove.png
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.. |mv| image:: ../images/sort.png
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In this dialog:
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* **Names** contains names of the selected mesh objects whose elements will be merged.
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* **Automatic** or **Manual** Mode allows choosing how the elements are processed. In the **Automatic** Mode all elements created on the same nodes will be merged. In **Manual** mode you can adjust groups of coincident elements detected by the program.
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* **Exclude groups from detection** group allows to ignore the elements which belong to the specified mesh groups. This control is active provided that the mesh includes groups.
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* **Elements to keep during the merge** group allows to specify elements to keep in the mesh. (By default an element being the first in a group of coincident elements is kept.) It is possible to either select elements in the Viewer or select groups whose elements will be kept.
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* *Selection* button activates selection of elements to keep.
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* **Elements** button activates selection of elements in the Viewer.
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* **Groups and sub-meshes** button activates selection of groups and sub-meshes.
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* **Add** button adds selected elements or groups to the list.
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* Elements or groups selected in the list can be removed using **Remove** button.
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If the **Manual** Mode is selected, additional controls are available:
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.. image:: ../images/mergeelems.png
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:align: center
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* **Detect** button generates the list of coincident elements found in the selected object.
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* **Coincident elements** is a list of groups of elements for merging. After the operation all elements of each group will be united into one element. The first element of a group is kept and the others are removed.
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* **Remove** button deletes the selected group from the list.
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* **Add** button adds to the list a group of elements selected in the viewer with pressed "Shift" key.
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* **Select all** check-box selects all groups.
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* **Show double elements IDs** check-box shows/hides identifiers of elements of the selected groups in the 3D viewer.
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* **Edit selected group of coincident elements** list allows editing the selected group:
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* |ad| adds to the group the elements selected in the viewer.
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* |rm| removes the selected elements from the group.
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* |mv| moves the selected element to the first position in the group in order to keep it in the mesh.
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* To confirm your choice click **Apply** or **Apply and Close** button.
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In the following picture you see a triangle which coincides with one of the elements of the mesh. After we apply **Merge Elements** functionality, the triangle will be completely merged with the mesh.
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.. image:: ../images/meshtrianglemergeelem1.png
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:align: center
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**See Also** a sample TUI Script of a :ref:`tui_merging_elements` operation.
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