esperimenti_02_ant_foraging.nlogo

globals [n_morti]

patches-own [
  nest?
  food?
  odorenido
  feromone
]

turtles-own [
  angolo_virata
  velocita
  scorta
  metabolismo
]

to setup-patches
  ask patches
  [ setup-nest
    setup-cibo
    ricolora-patch ]
end

to setup-turtles
  set size 2
  set color red
  set scorta scorta_tartarughe
  set angolo_virata random-float angolo_virata_massimo
  set angolo_virata angolo_virata + 30
  set metabolismo ((random 5) + 1)
  set velocita ((random 2) + 1)
end

to setup-nest  ;; patch procedure
  set nest? (distancexy 0 0) < 5
  set odorenido 200 - distancexy 0 0
end

to setup-cibo1
  if (distancexy (0.6 * max-pxcor) 0) < 5
  [ set food? true ]
end

to setup-cibo2
  if (distancexy (-0.6 * max-pxcor) (-0.6 * max-pycor)) < 5
  [ set food? true ]
end


to setup-cibo3
  if (distancexy (-0.8 * max-pxcor) (0.8 * max-pycor)) < 5
  [ set food? true ]
end

to setup-cibo  ;; patch procedure
  set food? false

  setup-cibo1
  setup-cibo2
  setup-cibo3
end

to ricolora-patch
  set pcolor scale-color green feromone 0.1 5

  if nest? [
    set pcolor violet
  ]
  if food? [
    set pcolor yellow
  ]
end

to setup
  clear-all
  set n_morti 0
  setup-patches
  set-default-shape turtles "bug"
  crt numero_termiti [
    setup-turtles
  ]
  reset-ticks
end

to passo-con-rumore
    rt random-float angolo_virata
    lt random-float angolo_virata
    fd velocita
end

to-report senti_feromone_ad_angolo [angolo]
  let p patch-right-and-ahead angolo 1.5
  report [feromone] of p
end

to cerca-cibo
  let psx senti_feromone_ad_angolo -45
  let pc senti_feromone_ad_angolo 0
  let pdx senti_feromone_ad_angolo 45
  let pmax max(list psx pc pdx)

  if pmax > 0.05 [
    if psx > pc [
      lt angolo_virata;
    ]
    if pdx > pc [
      rt  angolo_virata;
    ]
  ]

  passo-con-rumore
  if food? [
    set color orange
    set food? false
    rt 180
  ]
end

to-report senti_nido_ad_angolo [angolo]
  let p patch-right-and-ahead angolo 1.5
  report [odorenido] of p
end

to torna-nido
  let psx senti_nido_ad_angolo -45
  let pc senti_nido_ad_angolo 0
  let pdx senti_nido_ad_angolo 45
  let pmax max(list psx pc pdx)

  ; si va diritto, a meno che il segnale non sia più forte di lato

  if psx >= pmax [
    lt angolo_virata;
  ]
  if pdx >= pmax [
    rt angolo_virata;
  ]

  fd velocita
  set feromone feromone + 60
  if nest? [
    set scorta scorta_tartarughe
    set color red
    rt 180
  ]
end

to step
  diffuse feromone (diffusion-rate / 100)
  ask patches [
    set feromone feromone * (100 - evaporation-rate) / 100
    ricolora-patch
  ]

  ask turtles [
    ifelse color = orange [
      torna-nido
    ] [
      cerca-cibo
    ]
    set scorta (scorta - metabolismo)
    if scorta < 0 [
      setup-turtles
      set n_morti (n_morti + 1)
    ]
  ]

  ; segue la ricarica delle fonti di cibo - a turno ogni 70 passi
  let resto ticks
  set resto resto mod 210
  if  resto = 0
     [ ask patches[setup-cibo1] ]
  if  resto = 70
     [ ask patches[setup-cibo2] ]
  if  resto = 140
     [ ask patches[setup-cibo3] ]
  tick
end
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plot 1
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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

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## THINGS TO TRY

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## EXTENDING THE MODEL

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

## NETLOGO FEATURES

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## 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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