BlockA_PondTrade_step05_refactoring and organizing code.nlogo

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; GNU GENERAL PUBLIC LICENSE ;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;  The PondTrade model
;;  Copyright (C) 2018 Andreas Angourakis (andros.spica@gmail.com)
;;
;;  This program is free software: you can redistribute it and/or modify
;;  it under the terms of the GNU General Public License as published by
;;  the Free Software Foundation, either version 3 of the License, or
;;  (at your option) any later version.
;;
;;  This program is distributed in the hope that it will be useful,
;;  but WITHOUT ANY WARRANTY; without even the implied warranty of
;;  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;  GNU General Public License for more details.
;;
;;  You should have received a copy of the GNU General Public License
;;  along with this program.  If not, see <http://www.gnu.org/licenses/>.

;;;;;;;;;;;;;;;;;
;;; VARIABLES ;;;
;;;;;;;;;;;;;;;;;

patches-own [ isLand ]
; inside these brackets goes the names of all patches variables.
; In this case, the only variable is a 'boolean' variable (true/false)
; indicating whether the patch is a land patch or not.
; Unlike most programming languages,
; in NetLogo it is not necessary to declare the type of a variable.

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; SETUP ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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to setup

  clear-all

  ; set the random seed so we can reproduce the same experiment
  random-seed seed

  create-map

end

to create-map

  let centralPatch patch (min-pxcor + (floor world-width / 2)) (min-pycor + (floor world-height / 2))

  let halfSmallerDimension (world-width / 2)
  if (world-width > world-height) [ set halfSmallerDimension (world-height / 2) ]

  let minDistOfLandToCenter round ((pondSize / 100) * halfSmallerDimension)

  let coastThreshold minDistOfLandToCenter ; defaults to the basic value

  ;; add noise to coast line
  ; set general noise range depending on UI's coastalNoiseLevel and the size of world
  let noiseRange (halfSmallerDimension * coastalNoiseLevel / 100)

  ask patches
  [
    ; noiseType is specified with the chooser in the UI
    if (noiseType = "uniform")
    [
      ; adds a random amount from a uniform distribution with mean minDistOfLandToCenter
      set noiseRange (random-float noiseRange) - (noiseRange / 2)
      set coastThreshold minDistOfLandToCenter + noiseRange
    ]
    if (noiseType = "normal")
    [
      ; adds a random amount from a normal distribution with mean minDistOfLandToCenter
      set coastThreshold random-normal minDistOfLandToCenter (halfSmallerDimension * coastalNoiseLevel / 100)
    ]

    ifelse (distance centralPatch < coastThreshold)
    [
      set isLand false
    ]
    [
      set isLand true
    ]

  ]

  smooth-coast-line

  paint-patches

end

to smooth-coast-line

  ; smooth coast line
  repeat smoothIterations
  [
    ask patches
    [
      ifelse (isLand = false)
      [
        ; water patch
        ; consider ratios instead of absolute numbers to avoid having isolated water bodies adjacent to the world limits (less than 8 neighbors)
        if (count neighbors with [isLand = true] / count neighbors >= coastLineSmoothThreshold / 8)
        [
          ; water patch has a certain number of land neighbors
          set isLand true ; converted to land
        ]
      ]
      [
        ; land patch
        if (count neighbors with [isLand = false] / count neighbors >= coastLineSmoothThreshold / 8)
        [
          ; land patch has a certain number of water neighbors
          set isLand false ; converted to water
        ]
      ]
    ]
  ]

end

to paint-patches

  ask patches
  [
    ifelse (isLand = false)
    [ set pcolor 106 ] ; blue for water
    [ set pcolor 54 ] ; green for land
  ]

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

(a general understanding of what the model is trying to show or explain)

## HOW IT WORKS

(what rules the agents use to create the overall behavior of the model)

## HOW TO USE IT

(how to use the model, including a description of each of the items in the Interface tab)

## THINGS TO NOTICE

(suggested things for the user to notice while running the model)

## THINGS TO TRY

(suggested things for the user to try to do (move sliders, switches, etc.) with the model)

## EXTENDING THE MODEL

(suggested things to add or change in the Code tab to make the model more complicated, detailed, accurate, etc.)

## NETLOGO FEATURES

(interesting or unusual features of NetLogo that the model uses, particularly in the Code tab; or where workarounds were needed for missing features)

## RELATED MODELS

(models in the NetLogo Models Library and elsewhere which are of related interest)

## CREDITS AND REFERENCES

(a reference to the model's URL on the web if it has one, as well as any other necessary credits, citations, and links)
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NetLogo 6.2.2
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