Node Selection: Select nodes to be affected by a command

The dialog box will be popped up if inside another dialog the button “New selection” is pressed for getting a node selection. This dialog may also be invoked independent of another command. It offers the possibility of specifying and saving 3 different selection sets, which can later be activated by other commands.

The dialog remains active until it's explicitly closed by "OK" or "Cancel". New partial selections can be specified multiple times, which can be combined with the current global selection by different ways (see "Kind of combination").

By pressing the “Plot” button the current selection can be graphically checked. Within a new display list selected nodes are marked with a colored symbol.

Button „Do combination“ combines the current partial selection with the global selection using the given parameters and produces a new global selection. The number of selected nodes is shown. Default for the global selection is always the latest chosen selection except the latest selection contained all nodes. In this case the global selection is set to zero.

Following options are available:


New partial selection for combination

For specifying a new partial selection for a combination with the global selection the following alternatives are available:

New: Erase current partial selection.

All: All nodes are selected.

ID range: First and last ID of a range of IDs must be given.

xyz limits: All nodes are selected which are inside a given cube. Input parameters for the cube are xl, xr, yl, yr, zl, zr, cs that are the left and right coordinates of the cube within a given coordinate system cs.

Set1-Set3: Actual saved selection within this set is used.

Graphically: Following selection has to be done graphically within the OpenGL window. All selectable nodes are marked by a symbol. A dialog box pops up where you should choose the kind of the graphically selection.

Element nodes: All nodes of the current selected elements are selected. With option „Corner nodes“ marked only element vertices are selected without nodes on edges, with option „Base“ or „Top surface“ marked, only node of the base or top surface of solid elements are selected, With button „Element selection“ the active element selection used by this command can prior be defined.

Plot: Pressing this button plots the partial selection.

Kind of combination

Following alternatives for the combination of a new partial selection with the global selection are available:

New global selection: The current global selection will be erased.

Add pat selection: New partially selected nodes are merged with the global selection.

Intersection: The intersection between new partial selection and global selection builds the new global selection, i.e. only those nodes contained within both sets are selected.

Delete part selection: New partial selected nodes are removed from the current selection.

Get complement: A complement set is build, i.e. all currently not selected nodes are contained within the new global selection.

Do combination: Pressing this button will cause the combination of the partial and global selection to be done.

Plot selected nodes: Pressing this button, the current global selection can be checked graphically.

Save selection as

The current selection will be saved within the chosen set and can be used by following commands. Saved are the external node ID's, i.e. the set remains valid until numbering won't be changed.