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Part of what I am trying to do is make a breed of turtles move around, but when one reaches its destination that turtle waits for a certain number of ticks before continuing ? Also is it possible to make turtles wait for different number of ticks depending upon their destination ( different patch colors). Is it a case of making a turtle breed or global variable to count the number of ticks? The hopefully relevant code is below.

Sam
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SamP
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  • I have tried the following, but it seems to count down within 1 tick rather than a turtle staying for x number of ticks. http://stackoverflow.com/questions/19993631/netlogo-how-to-make-turtles-stop-for-a-set-number-of-ticks-then-continue – SamP Mar 25 '14 at 12:17

1 Answers1

2

You are right, this can be done by making the turtles count the number of ticks they have been on a patch. Also this has to be a turtle variable and not a global variable since each turtle will have a different value for this

The approach, I have used is this:

  1. Once the turtle arrives at its destination record the ticks (the global variable which records the number of ticks that have passed till now) into a turtle variable say ticks-since-here. This works like a time-stamp.

  2. On each successive tick check the difference between the current-time ticks global variable and the ticks-since-here turtle variable. If this becomes greater than the number of ticks the turtle is allowed to stay on the patch, let it choose and move to the new destination.

    breed [visitors visitor]

    globals [ number-of-visitors ]

visitors-own [
  ; visitors own destination 
  destination
  ticks-since-here
]

to go
  ask visitors [
    move
  ]
  tick
end

to move
  ; Instructions to move the agents around the environment go here
  ; comparing patch standing on to dest, if at dest then  choose random new dest
  ; then more forward towards new dest
  ifelse ( patch-here = destination ) 
  [
    if ticks - ticks-since-here > ticks-to-stay-on-patch patch-here
    [
      set ticks-since-here 0
      set destination one-of patches with 
      [
        pcolor = 65 or pcolor = 95 or pcolor = 125 or pcolor = 25 or pcolor = 15 or pcolor = 5
      ]
    ]
  ]
  [
    face destination
    forward 1
    if ( patch-here = destination ) 
    [
      set ticks-since-here ticks
    ]
  ]
end

to-report ticks-to-stay-on-patch [p]  
  if [pcolor] of p = 65
    [
      report 6
    ]
  if [pcolor] of p = 95
    [
      report 5
    ]
  if [pcolor] of p = 125
    [
      report 4
    ]
  if [pcolor] of p = 25
    [
      report 3
    ]
  if [pcolor] of p = 15
    [
      report 2
    ]
  if [pcolor] of p = 5
    [
      report 1
    ] 
end

to setup-people 
  ;;;; added the following lines to facilitate world view creation
  ask patches
  [
    set pcolor one-of [65 95 125 25 15 5]
  ]
  set number-of-visitors 100
  ;;;;

  create-visitors number-of-visitors 
  [
    ask visitors 
    [
      ; set the shape of the visitor to "visitor"
      set shape "person"
      ; set the color of visitor to white
      set color white
      ; give person a random xy
      setxy (random 50) (random 50)
      ; set visitors destination variable
      set destination one-of patches with 
      [
        pcolor = 65 or pcolor = 95 or pcolor = 125 or pcolor = 25 or pcolor = 15 or pcolor = 5
      ]
    ]
  ]  
end
Meghendra
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