Jebel Sahaba Model 1 - equal resource distribution + cows

globals [
  max-people
  max-arrows
]

breed [ people person ]
breed [ arrows arrow ]
breed [ cows cow ]

turtles-own [ energy ]
patches-own [ countdown ]

to setup
  clear-all


  ask patches [ set pcolor green ]



  create-people initial-number-people
  [
  set shape "person"
  set color black
  set size 1.5
  set energy random (2 * people-gain-from-food)
  setxy random-xcor random-ycor
  ]

  create-arrows initial-number-arrows
  [
    set shape "arrow"
    set color red
    set size 1.5
    set energy random (2 * arrows-gain-from-food)
    setxy random-xcor random-ycor
  ]

  create-cows initial-number-cows

 [
    set shape "cow"
    set color violet
    set size 1.5
    set energy random (2 * cows-gain-from-food)
    setxy random-xcor random-ycor
  ]
  reset-ticks
end 

to go

  if not any? turtles [ stop ]

  if not any? arrows and count people > max-people [ user-message "Agriculturalists won" stop ]
  if not any? people and count arrows > max-arrows [ user-message "Hunter gatherers won" stop ]

  ask people [
    move
    set energy energy - 1
      eat-grass
      eat-cows
      eat-arrows
      death
      reproduce-people
  ]


  ask arrows [
    move
    set energy energy - 1
    eat-grass
    eat-cows
    eat-people
    death
    reproduce-arrows
  ]

 ask cows [
    move
    set energy energy - 1
    eat-grass
    death
    reproduce-cows
  ]

 ask patches [ grow-grass ]

  tick
end 

to move
  rt random 50
  left random 50
  fd 1
end 

to eat-grass
  if pcolor = green [
    set pcolor brown
    set energy energy + people-gain-from-food
    set energy energy + arrows-gain-from-food
    set energy energy + cows-gain-from-food
  ]


  ifelse show-energy?
  [ set label energy ]
  [set label "" ]
end 

to reproduce-people  ;
  if random-float 100 < people-reproduce [
    set energy (energy / 2)
    hatch 1 [ rt random-float 360 fd 1 ]
  ]
end 

to reproduce-arrows
  if random-float 100 < arrows-reproduce [
    set energy (energy / 2)
    hatch 1 [ rt random-float 360 fd 1 ]
  ]
end 

to reproduce-cows
  if random-float 100 < cows-reproduce [
    set energy (energy / 2 )
    hatch 1 [ rt random-float 360 fd 1 ]
  ]
end 

to eat-people
  let prey one-of people-here
  if prey != nobody  [
    ask prey [ die ]
    set energy energy + arrows-gain-from-food
  ]
end 

to eat-arrows
  let prey one-of arrows-here
  if prey != nobody [
    ask prey [ die ]
    set energy energy + people-gain-from-food
  ]
end 

to eat-cows
  let prey one-of cows-here
  if prey != nobody [
    ask prey [ die ]
    set energy energy + people-gain-from-food
    set energy energy + arrows-gain-from-food
  ]
end 

to death
  if energy < 0 [ die ]
end 

to grow-grass
  if pcolor = brown [
    ifelse countdown <= 0
      [ set pcolor green
        set countdown grass-regrowth-time ]
      [ set countdown countdown - 1 ]
  ]
end