Group Format

Group Format

Groups are written to the keyword deck after the *END keyword. As with any keyword lines beginning with a $ are treated as comments and skipped.
It is strongly recommended that you do not edit the groups by hand. Use the group creating/editing capabilities of PRIMER.
Entities can be added to a group by one of three methods;

• Selecting all entities (optionally in a box)
• Selecting a list of entities (optionally in a box)
• Selecting a range of entities (optionally in a box)

The box is used for selecting a subset of the entities that are in the box. For example if the group contained ' all elements inside box 1' then only the elements that are in box 1 will be used, not all the elements.

Entities can be added or removed from a group. For example you may want a group to contain ' all elements except those in box 1'. You could do this by first 'adding all elements' and then 'removing elements in box 1'.

Example

*GROUP
$<title>
This is the example group title
$<label> < visual attributes of the group>
1 R255G000B000 50 CURRENT * * * * UNBLANKED
$ The following lines give examples of a group
$
$ Adding all parts to a group 
PART ALL
$ Adding all parts to a group in box 1
PART ALL BOX 1
$ Removing all parts from a group in box 2. Note -PART
-PART ALL BOX 2
$ Adding a list of shells to a group
SHELL 1 20 23 100 200
$ Adding a list of shells to a group in box 2
SHELL 1 20 23 100 200 BOX 2
$ Adding a range of nodes (100 to 1000) to a group
NODE 100:1000
$ Adding a range of nodes (100 to 1000) to a group in box 2
NODE 100:1000 BOX 2
$ Removing a range of beams from a group. Note -BEAM
-BEAM 50:60

Order of calculation of Groups

The order in which things are added to/removed from groups is important. To stop any ambiguity the following order is used.

First, entities are added to groups in the following order:

• SET_PART
• PART
• other set types
• elements
• other entities alphabetically

Then, entities are removed from groups (if needed) in the same order.