Ask-Concurrent Example

Ask-Concurrent Example preview image

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Uri_dolphin3 Uri Wilensky (Author)

Tags

code example 

Tagged by Reuven M. Lerner over 6 years ago

Model group CCL | Visible to everyone | Changeable by group members (CCL)
Model was written in NetLogo 5.0.4 • Viewed 437 times • Downloaded 27 times • Run 0 times
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turtles-own [done?]  ;; this is used only by GO-TURTLES-ALTERNATE

to setup
  clear-all
  ask patches with [pycor = 0] [
    sprout 1 [ set heading 0 ]
  ]
  reset-ticks
end 

to go
  ;; make a red patch in each column
  ask patches with [pycor = 0] [
    ask patch-at 0 (random world-height) [
      set pcolor red
    ]
  ]
  ;; have every turtle move forward until it
  ;; finds the red patch in its column
  go-turtles
  tick
end 

to go-turtles
  ask-concurrent turtles [
    while [pcolor != red] [ fd 1 ]
    set pcolor black
  ]
end 

;; Here's one way to do the same thing as GO-TURTLES but using
;; ASK instead of ASK-CONCURRENT.  The behavior of the turtles
;; is the same and the visual result (turtles working on their
;; task concurrently, rather than each completing its task
;; serially) is the same.  Note the use of a turtles-own variable.

to go-turtles-alternate
  ask turtles [ set done? false ]
  loop [
    let still-moving turtles with [not done?]
    if not any? still-moving [ stop ]
    ask still-moving [
      ifelse pcolor = red
        [ set pcolor black
          set done? true ]
        [ fd 1 ]
    ]
  ]
end 


; Public Domain:
; To the extent possible under law, Uri Wilensky has waived all
; copyright and related or neighboring rights to this model.

There are 10 versions of this model.

Uploaded by When Description Download
Uri Wilensky about 6 years ago Updated to NetLogo 5.0.4 Download this version
Uri Wilensky over 6 years ago Updated version tag Download this version
Uri Wilensky over 7 years ago Updated to NetLogo 5.0 Download this version
Uri Wilensky almost 9 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky almost 9 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky almost 9 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky almost 9 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky about 9 years ago Model from NetLogo distribution Download this version
Uri Wilensky about 9 years ago Ask-Concurrent Example Download this version
Uri Wilensky about 9 years ago Ask-Concurrent Example Download this version

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