breed [ants ant]
patches-own [pheromone food nest distance-from-nest]
ants-own [carrying-food hunger]

globals [food-in-nest]

to setup
  clear-all
  reset-ticks
  setup-nest
  setup-food
  setup-ants
  ask patches [p-paint-patch]
  ask ants [t-paint-ant]
end

to p-paint-patch
  set pcolor black
  if show-pheromone [
    set pcolor scale-color pheromone-color pheromone pheromone-min pheromone-max
  ]
  if show-distance [
    ; 35 * sqrt(2) = ~50
    set pcolor scale-color distance-color distance-from-nest 0.1 50
  ]
  if show-food and food = 1 [
    set pcolor food-color
  ]
  if show-nest and nest = 1 [
    set pcolor nest-color
  ]
end

to t-paint-ant
  set hidden? not show-ants
  ifelse carrying-food = 1 [
    set color ant-carrying-color
  ][
    set color ant-color
  ]
end

to setup-nest
  ask patches [
    p-setup-nest
  ]
  set food-in-nest 0
end

to p-setup-nest
  ifelse (distancexy nest-x nest-y) < nest-size [
    set nest 1
  ][
    set nest 0
  ]
  set distance-from-nest distancexy nest-x nest-y
end

to setup-food
  ask patches [
    p-add-food food-x-1 food-y-1 food-size-1
    p-add-food food-x-2 food-y-2 food-size-2
    p-add-food food-x-3 food-y-3 food-size-3
  ]
end

to p-add-food [x y s]
  if (distancexy x y) < s [
    set food 1
  ]
end

to setup-ants
  set-default-shape ants "bug"
  create-ants ants-qty
  ask ants [t-setup-ant]
end

to t-setup-ant
  set color ant-color
  set carrying-food 0
  set hunger 0
  setxy nest-x nest-y
  fd nest-size
end

to p-evaporate-pheromone
  set pheromone pheromone * (100 - evaporation-pct) / 100
end

to-report t-pheromone-left
  report [pheromone] of patch-left-and-ahead 45 1
end

to-report t-pheromone-center
  report [pheromone] of patch-ahead 1
end

to-report t-pheromone-right
  report [pheromone] of patch-right-and-ahead 45 1
end

to t-rotate-pheromone
  ; TODO: aggiungere rotazione a caso
  let pleft t-pheromone-left
  let pcenter t-pheromone-center
  let pright t-pheromone-right
  if (pleft >= 0.05 and pleft <= 2) or (pcenter >= 0.05 and pcenter <= 2) or (pright >= 0.05 and pright <= 2)[
  ifelse pleft > pright and pleft > pcenter [
    left 45
  ][
    if pright > pcenter [
      right 45
    ]
  ]]
end

to-report t-nest-left
  report [distance-from-nest] of patch-left-and-ahead 45 1
end

to-report t-nest-center
  report [distance-from-nest] of patch-ahead 1
end

to-report t-nest-right
  report [distance-from-nest] of patch-right-and-ahead 45 1
end

to t-rotate-nest
  let nleft t-nest-left
  let ncenter t-nest-center
  let nright t-nest-right
   ifelse nleft > nright and nleft > ncenter [
     right 45
   ][
     if nright > ncenter [
       left 45
     ]
   ]
end

to-report t-is-over-food
  report ([food] of patch-here = 1)
end

to-report t-is-over-nest
  report ([nest] of patch-here = 1)
end

to t-pick-up-food
  ask patch-here [
    set food 0
  ]
  set carrying-food 1
  rt 180
end

to t-try-pick-up-food
  if carrying-food = 0 and t-is-over-food [
    t-pick-up-food
  ]
end

to t-drop-food
  set carrying-food 0
  set food-in-nest food-in-nest + 1
  rt 180
end

to t-try-drop-food
  if carrying-food = 1 and t-is-over-nest [
    t-drop-food
  ]
end

to t-add-pheromone
  ask patch-here [
    set pheromone pheromone + 60
  ]
end

to t-set-hunger
  if random-float 100 < hunger-increase-pct[
  set hunger hunger + hunger-per-tick
  ]
end

to t-try-eat-food
  if carrying-food = 1[
    set hunger 0
    set carrying-food 0
  ]
  if t-is-over-nest and food-in-nest > 0[
    set hunger 0
    set food-in-nest food-in-nest - 1]
end

to t-work
  ifelse carrying-food = 1 or (hunger >= hunger-threshold and enable-hunger)[
    t-rotate-nest
    if carrying-food = 1[
      t-add-pheromone]
  ][
    t-rotate-pheromone
  ]
  left random random-angle
  right random random-angle
  fd 1
  t-try-pick-up-food
  t-try-drop-food
  t-set-hunger
  if hunger >= hunger-threshold and enable-hunger [
    t-try-eat-food
    if hunger >= hunger-max [
      die]
  ]
end

to p-respawn-food
  if random-float 100 < food-respawn-pct[
    setup-food
  ]
end

to go
  tick
  ask ants [t-work]
  ask patches [p-evaporate-pheromone]
  diffuse pheromone (diffusion-pct / 100)
  ask patches [p-paint-patch]
  ask ants [t-paint-ant]
  if enable-food-respawn and ticks mod food-ticks = 0[
    p-respawn-food
  ]
end
@#$#@#$#@
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PLOT
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Ants with food
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"" ""
PENS
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PLOT
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TEXTBOX
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TODO: nuovi grafici e aggiunte belline!
11
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SWITCH
360
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show-pheromone
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-1000

SWITCH
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INPUTBOX
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SWITCH
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INPUTBOX
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random-angle
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INPUTBOX
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food-ticks
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Number

SLIDER
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VERTICAL

INPUTBOX
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PLOT
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Food in Nest
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NIL
0.0
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true
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"" ""
PENS
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PLOT
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Ants
NIL
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0.0
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true
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"" ""
PENS
"Alive" 1.0 0 -2674135 true "" "plot count turtles"
"Dead" 1.0 0 -16777216 true "" "plot (ants-qty - count turtles)"
"Starving" 1.0 0 -817084 true "" "plot count turtles with [hunger > hunger-threshold]"

SLIDER
1325
91
1362
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hunger-increase-pct
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%
VERTICAL

@#$#@#$#@
## 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 6.1.1
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
default
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-0.2 0 0.0 1.0
0.0 1 1.0 0.0
0.2 0 0.0 1.0
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0
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@#$#@#$#@
1
@#$#@#$#@