breed [ants ant]
patches-own [pheromone food nest distance-from-nest]
ants-own [carrying-food speed metabolism hunger]
globals [ant-deaths ants-to-respawn]

to setup
  clear-all
  reset-ticks
  setup-nest
  setup-food
  setup-ants
  ask patches [p-paint-patch]
  ask ants [t-paint-ant]
  set ant-deaths 0
  set ants-to-respawn 0
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
  ]
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
  add-food-1
  add-food-2
  add-food-3
end

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

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

to add-food-3
  ask patches [
    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 respawn-ants
  create-ants ants-to-respawn [t-setup-ant]
  set ants-to-respawn 0
end

to t-setup-ant
  set color ant-color
  set carrying-food 0
  ; Ho usato dei float invece che degli int, va bene lo stesso?
  set speed (random (max-speed - min-speed + 1)) + min-speed
  set metabolism (random (max-metabolism - min-metabolism + 1)) + min-metabolism
  set hunger max-hunger
  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
  rt 180
end

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

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

to t-die
  ; "To die is human, to respawn... divine!" --Zeus, Dota 2
  set ant-deaths ant-deaths + 1
  set ants-to-respawn ants-to-respawn + 1
  ; Die interrompe la funzione!
  die
end

to t-resupply
  set hunger max-hunger
end

to t-consume-food
  set hunger hunger - metabolism
  if hunger <= 0 [
    t-die
  ]
end

to t-work
  ifelse carrying-food = 1 [
    t-rotate-nest
    t-add-pheromone
  ][
    t-rotate-pheromone
  ]
  left random random-angle
  right random random-angle
  t-consume-food
  repeat speed [
    fd 1
    t-try-pick-up-food
    if t-try-drop-food [
      t-resupply
    ]
  ]
end

to try-respawn-food-1
  if ticks mod food-r-1 = food-o-1 [
    add-food-1
  ]
end

to try-respawn-food-2
  if ticks mod food-r-2 = food-o-2 [
    add-food-2
  ]
end

to try-respawn-food-3
  if ticks mod food-r-3 = food-o-3 [
    add-food-3
  ]
end

to try-respawn-food
  try-respawn-food-1
  try-respawn-food-2
  try-respawn-food-3
end

to go
  tick
  if food-respawn [
    try-respawn-food
  ]
  respawn-ants
  ask ants [t-work]
  ask patches [p-evaporate-pheromone]
  diffuse pheromone (diffusion-pct / 100)
  ask patches [p-paint-patch]
  ask ants [t-paint-ant]
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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