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mowgly
mowgly

Reputation: 77

NetLogo: how to use tick in correct context

I am relatively new to NetLogo and have been trying to figure this out for quite some time. I have a search path algorithm that determines the optimal path for each turtle (ship) in my model, storing each path as a separate list of patches. The goal is to have the turtles traverse along the list of patches while having the tick counter increase each step the turtles take (i.e. a tick every time all the turtles move from one patch to the next) - until it reaches the destination. Seems pretty simple but for some reason I can't seem to figure out the correct way to use the context of 'tick'.

Here's an example of my code corresponding to the movement portion (once the lists of paths have already been generated).

to move
  tick
  ask-concurrent ships
    [
      while [length current-path != 0]
      [ 
        face first current-path
        move-to first current-path
        set current-path remove-item 0 current-path
        wait 0.08
      ]
    ]

end

Currently the tick counter only ticks once for the entire simulation. Can anyone help me code this in a different way in order to have the ticks increase each time the turtles (collectively) move from patch to patch? Any help would be greatly appreciated.

Here is the portion of code where move is being called

  to find-shortest-path-to-destination
  place-turtles
  label-destination
  foreach sort ships
 [ ask ? 
  [ 
    set path find-a-path current-waypoint target-waypoint
    set optimal-path path
    set current-path path  
  ]
 ]
  move
end

Upvotes: 2

Views: 1158

Answers (1)

mattsap
mattsap

Reputation: 3806

I would change your code to the following and put move inside of a repeat block. Essentially, everyone moves 1 path unit at a time and then move is called again,which then calls the next tick-event to occur

to move
     tick
     ask-concurrent ships with [length current-path != 0]
     [
        face first current-path
        move-to first current-path
        set current-path remove-item 0 current-path
        wait 0.08
     ]

end
to go
    while [any? ships with [length current-path != 0]] [move]
end

Upvotes: 3

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