layout-radial 4.0

layout-radial turtle-set link-set root-agent

Arranges the turtles in turtle-set connected by links in link-set, in a radial tree layout, centered around the root-agent which is moved to the center of the world view.

Only links in the link-set will be used to determine the layout. If links connect turtles that are not in turtle-setthose turtles will remain stationary.

Even if the network does contain cycles, and is not a true tree structure, this layout will still work, although the results will not always be pretty.

to make-a-tree
  set-default-shape turtles "circle"
  crt 6
  ask turtle 0 [
    create-link-with turtle 1
    create-link-with turtle 2
    create-link-with turtle 3
  ]
  ask turtle 1 [
    create-link-with turtle 4
    create-link-with turtle 5
  ]
  ; do a radial tree layout, centered on turtle 0
  layout-radial turtles links (turtle 0)
end