Gatherer Model v2

breed [hunters hunter]
breed [gatherers gatherer]
breed [rabbits rabbit]

hunters-own [ energy
             patience
             has-rabbit? ]
gatherers-own [has-food?
             energy ]
rabbits-own [ energy ]

to setup
  clear-all
  set-default-shape hunters "person" ;; create hunters
  set-default-shape gatherers "person" ;; create hunters
  set-default-shape rabbits "rabbit"
  ask patches
  [ ifelse random-float 100 < density 
    [set pcolor yellow] ;; scatter food
    [set pcolor green] ]
  create-hunters number [
    set color red
    set size 5
    set energy 100
    setxy random-xcor random-ycor
    set patience 100
    set has-rabbit? false
  ]
  create-gatherers number2 [
    set color white
    set size 5
    set energy 100
    setxy random-xcor random-ycor
    set has-food? false
  ]
  create-rabbits number3 [
    set color brown
    set size 3
    set energy 50
    setxy random-xcor random-ycor
  ]
  reset-ticks
end 

to go
  ;; AH: Adding correct indentation here makes it a lot easier to read and code. Just highlight and press tab. :)
  

  ask turtles [
    move    
    ask gatherers with [not has-food?] [find-food]
    ask gatherers with [has-food?] [find-pile]
    ask gatherers with [not has-food?] [
      if energy < 70 [eat-food]]
    ask hunters with [not has-rabbit?] [hunt-rabbits]
    ask hunters with [has-rabbit? and energy < 70] [eat-rabbit]
    if ticks mod 500 = 0 [set energy (energy - 5)]
    ask rabbits [reproduce-rabbits]
    ask rabbits with [energy < 40] [rabbit-eat]
    harvest-time
    ask turtles with [energy <= 0] [die]
    ]
  tick
end 


;; We move in a separate procedure

to move 
  fd 1
  rt 20 - random 40
end 


;; You call this procedure recursively and move around, instead of moving around for each tick, and then calling this
;; procedure.

to find-food
    
    ;; we pick up food only if there is not already a lot of food around it
    ;; (i.e. on at least three patches)
    if pcolor = yellow and count neighbors with [pcolor = yellow] < 3 [
      ;; pick up food
      set has-food? true
      ;; remove food from patch
      set pcolor green
      
    ]
end 

to eat-food
  if pcolor = yellow and count neighbors with [pcolor = yellow] > 2 [
    set pcolor green
    set energy (energy + 5)]
end 

to find-pile
  if pcolor = yellow and [pcolor] of patch-ahead 1 != yellow [
    ask patch-ahead 1 [set pcolor yellow]
    set has-food? false
  ]
end 

to harvest-time
  if ticks mod 1500 = 0 
  [ ask one-of patches with [pcolor != yellow and 
    count neighbors with [pcolor = yellow] < 3] [set pcolor yellow] ]
end 

to hunt-rabbits
    let prey one-of rabbits-here                    ;; grab a random sheepi
  if prey != nobody                             ;; did we get one?  if so,
    [ ask prey [ die ] 
      set has-rabbit? true] ;; get energy from eating
end 

to eat-rabbit
  set has-rabbit? false
  set energy energy + 10
end 

to reproduce-rabbits  ;; sheep procedure
  if random-float 100000 < rabbit-reproduce [  ;; throw "dice" to see if you will reproduce             ;; divide energy between parent and offspring
    hatch 1 [ rt random 360 fd 1 ]   ;; hatch an offspring and move it forward 1 step
  ]
end 

to rabbit-eat
  if pcolor = yellow [set pcolor green]
  set energy energy + 7
end