4.6-foraging-with-regrowth.nlogo

;; The MIT License (MIT)
;;
;; Copyright (c) 2011-24 David O'Sullivan and George Perry
;;
;; Permission is hereby granted, free of charge, to any person
;; obtaining a copy of this software and associated documentation
;; files (the "Software"), to deal in the Software without restriction,
;; including without limitation the rights to use, copy, modify, merge,
;; publish, distribute, sublicense, and/or sell copies of the Software,
;; and to  permit persons to whom the Software is furnished to do so,
;; subject to the following conditions:
;;
;; The above copyright notice and this permission notice shall be included
;; in all copies or substantial portions of the Software.
;;
;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
;; OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
;; THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
;; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
;; DEALINGS IN THE SOFTWARE.
;;

;;extensions [r]

breed [ foragers forager ]
breed [ spots spot ]

patches-own [
  current-yield
  timing
  in-range
]

globals [
  lm
  lv
  ls
  visited
]

to setup
  clear-all
  ;;r:setPlotDevice
  random-seed 10
  set visited []
  ask patches [
    set current-yield 0
    set timing random 12
    set in-range other patches in-radius vision-range
  ]
  repeat world-width / 2 [
    ask patches [
      set timing [timing] of one-of neighbors4
    ]
  ]
  (foreach (sort-on [timing] patches) (range count patches) [ [p t] ->
     ask p [
       set timing t
     ]
  ])
  ask patches with [timing > count patches - n-steps] [
    set current-yield 1 ; yield
  ]
  ask one-of patches with [current-yield > 0] [
    sprout-foragers 1 [
      set color black
    ]
    sprout-spots 1 [
      set color orange
      set size 1
      set shape "circle"
    ]
    set visited sort spots
  ]
  color-patches
  reset-ticks
end

to color-patches
  ask patches [
    ifelse current-yield > 0
    [ set pcolor green ]
    [ set pcolor white ]
  ]
end

to go
  ask patches [
    if ticks mod count patches = timing [
      set current-yield 1
    ]
  ]
  let target nobody
  ask foragers [
    set current-yield 0
    let targets patches with [current-yield > 0]
    let target-patch min-one-of targets [distance myself]
    ask target-patch [
      ifelse any? spots-here [
        ask one-of spots-here [
          set target self
        ]
      ]
      [
        sprout-spots 1 [
          set color orange
          set size 1
          set shape "circle"
          set target self
        ]
      set visited fput target visited
      ]
    ]
    if length visited > n-steps [
      let to-die length visited - n-steps
      foreach sublist visited (length visited - to-die) length visited [ trail ->
        ask trail [ die ]
      ]
      set visited reverse sort-on [who] spots
    ]
    move-to target-patch
  ]
  color-patches
  tick
end

;; R plotting code
;;to r-plot-image
;;  r:put "z" map [[current-yield] of ?] sort patches
;;  r:put "nr" world-height
;;  r:put "nc" world-width
;;  r:eval("z <-matrix(z, nrow=nr, ncol=nc)")
;;  r:eval("image(z, asp=1, axes=F, col=gray(1-0:100/100))")
;;end
;;
;;to r-plot-spots
;;  r:put "x" map [[xcor / world-width] of ?] visited
;;  r:put "y" map [[(world-width - ycor) / world-width] of ?] visited
;;  r:eval("lines(x,y)")
;;end
@#$#@#$#@
GRAPHICS-WINDOW
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419
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-1
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1
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1
1
1
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0
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0
99
0
99
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ticks
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BUTTON
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OBSERVER
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BUTTON
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go-n-steps
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NIL
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OBSERVER
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SLIDER
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n-steps
n-steps
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SLIDER
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vision-range
vision-range
1
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20.0
1
1
NIL
HORIZONTAL

@#$#@#$#@
## WHAT IS IT?

This model was suggested in part by

+   Boyer D and Walsh PD 2010 Modelling the mobility of living organisms in heterogeneous landscapes: does memory improve foraging success?. _Philosophical Transactions of the Royal Society A_ **368** 5645–5659.

but is much simpler.  For a discussion and more details see Chapter 4 of

+   O'Sullivan D and Perry GLW 2013 _Spatial Simulation: Exploring Pattern and Process_. Wiley, Chichester, England.

## HOW TO CITE

If you mention this model in a publication, please include these citations for the model itself and for NetLogo

+   O'Sullivan D and Perry GLW 2013 _Spatial Simulation: Exploring Pattern and Process_. Wiley, Chichester, England.
+   Wilensky U 1999 NetLogo. http://ccl.northwestern.edu/netlogo/. Center for Connected Learning and Computer-Based Modeling, Northwestern University, Evanston, IL.

## COPYRIGHT AND LICENSE

The MIT License (MIT)

Copyright &copy; 2011-24 David O'Sullivan and George Perry

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to  permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
@#$#@#$#@
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NetLogo 6.4.0
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