ball group
command
Syntax
- ball group s <keyword ...> <range>
-
Specify ball group names. Use of the group logic is described in the description of Groups in the General Components section. By default s is assigned to the group slot Default. Use the add keyword to assign the group name to the next available slot and the remove keyword to remove s from all slots.
- add
Assign s to the next available slot.
- remove
Remove s from all slots.
Usage Examples
Create a group of balls named top_grip
whose centroids’ \(y\)-position lies between 0.049 and 0.05.
ball group 'top_grip' range position-y 0.049 0.05
from “tension.dat” in Rock Testing
Create a group of balls named inclusions
whose centroids lie within the circle centered at -1.0 -3.0 with a radius of 0.5.
ball group 'inclusions' range circle center -1.0 -3.0 rad 0.5
from “inclusions.dat” in Inclusions in a Matrix
Create a group of balls named BackLeft
whose centroids’ \(x\)-position is given by the inline FISH formula.
ball group 'BackLeft' range position-x [lbx-0.05\*dx] 0.0 ...
from “BlenderBalls.dat” in Ribbon Blender
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