crime-spread-simulation.nlogo

; criminals: 15
; police stations: 105
; police: 95
; roads: 7

extensions [ rnd ]

breed [criminals criminal]
breed [policemen policeman]
breed [citizens citizen]
breed [crimes crime]
breed [caught-criminals caught-criminal]
;; A* util breed
breed [patch-owners patch-owner]

globals [
  count-policement
  count-free-criminals
  count-criminals-caught
  count-crimes-during-tick
  count-successful-runaways
]

patches-own [
  accessible?
  next-to-police-station?
  police-walking-range?
  drug-area?
  density
]

criminals-own [
  on-the-run?
  time-of-crime
  cooldown-period
  crime-probability
]

policemen-own[
  at-station?
  free?
  target

  ;; A* variables
  explored-patches ;; to find the way to the crime
  path-back ;; to find the way back to the station (without needing to run A* twice)
]

to init-density
  import-pcolors "density2.png"
  ask patches [
    set density 10 - pcolor
    if (density < 0) [ set density 0.1 ]
    if (pcolor = 0) [ set density 0.1 ]
  ]
  ask rnd:weighted-n-of population-size patches [ density ] [
    sprout-citizens 1
    [
      set shape "person"
      set color 55
      set size 13
    ]
  ]
  ask rnd:weighted-n-of (ratio-criminals * population-size) patches [ density ] [
    sprout-criminals 1
    [
      set on-the-run? false
      set time-of-crime nobody
      set cooldown-period 15
      set crime-probability 0
      set shape "person"
      set color 15
      set size 14
    ]
  ]
end

to init-roads
  import-pcolors "new_scaled.png"
  ask patches [

    set accessible? false
    set next-to-police-station? false
    set police-walking-range? false
    set drug-area? false

    if pcolor = 7
    [
      set accessible? true
    ]
    if pcolor = 5
    [
      set accessible? true
      set drug-area? true
    ]

    if pcolor = 27
    [
      set accessible? true
      set police-walking-range? true
      if any? patches in-radius 5 with [pcolor = 105]
      [
        set next-to-police-station? true
      ]
    ]
  ]
end

to init-policemen
  create-policemen ratio-policemen * population-size  [
    set shape "person police"
;    set color 101
    set color 0
    set size 14
    move-to one-of patches with [accessible? and next-to-police-station?]
    set target nobody
    set at-station? true
    set explored-patches []
    set path-back []
    set free? true
  ]
end

to setup
  __clear-all-and-reset-ticks
  init-density
  init-roads
  set count-crimes-during-tick 0
  set count-successful-runaways 0
  ask citizens [
    ifelse (any? (patches in-radius 50 with [accessible?]))[
      move-to min-one-of (patches in-radius 50 with [accessible?]) [distance myself]
    ]
    [
      die
    ]
  ]
  ask criminals [
      ifelse (any? (patches in-radius 50 with [accessible? and not police-walking-range?]))[
        move-to min-one-of (patches in-radius 50 with [accessible? and not police-walking-range?]) [distance myself]
      ]
      [
        die
      ]
  ]
  init-policemen
  set count-free-criminals ratio-criminals * population-size
  set count-policement ratio-policemen * population-size
  set count-criminals-caught 0
end

to go
  set count-crimes-during-tick 0
  ask criminals[
    let possible-patches (patches in-radius 20 with [accessible? and not police-walking-range?])
      if (any? possible-patches) [
        move-to one-of possible-patches
      ]
  ]
  ask policemen[
    ; If there is a target: move towards it
    ifelse (target != nobody)
    [
      ; Empty list of explored patches: pick the best possible move
      ifelse (empty? explored-patches)[
        ; update explored-patches and the path back
        let current-patch [patch-here] of self
        set explored-patches lput current-patch explored-patches
        set path-back lput current-patch path-back

        ; pick the next move
;        let next-patch min-one-of patches in-radius 20 with [accessible?] [distancexy ([xcor] of target) ([ycor] of target)]
        let next-patch nobody
        let dist 99999
        let target-criminal target
        ask patches in-radius 20 with [accessible?][
          sprout-patch-owners 1 [
            if (distance target-criminal < dist) [
              set dist distance target-criminal
              set next-patch [patch-here] of self
            ]
            die
          ]
        ]
        move-to next-patch
      ]
      ; Not empty: pick the best move that was not already explored ---- if there are no possible moves: backtrack through explored-patches
      [

        let valid? false
        let min-distance 0
        let next-patch nobody
        while [not valid?]
        [
          set min-distance 0
          let dist 99999
          let temp-patch nobody
          let target-criminal target
          ask patches in-radius 20 with [accessible?][


            sprout-patch-owners 1 [
              if (distance target-criminal < dist and distance target-criminal > min-distance) [
                set dist distance target-criminal
                set temp-patch [patch-here] of self
              ]
              die
            ]

          ]

          set min-distance [distance target] of patch-owners-on temp-patch
          if (not member? next-patch explored-patches)
          [
            set next-patch temp-patch
            set valid? true
          ]
          ;; At this point, if next-patch is set, we move
          ifelse (next-patch != nobody)
          [
            let current-patch [patch-here] of self
            set explored-patches lput current-patch explored-patches
            set path-back lput current-patch path-back
            move-to next-patch
            if (distance target-criminal < 3)
            [
            if ([shape] of target-criminal = "monster")[
              let patch-of-criminal [patch-here] of target-criminal
              ask patch-of-criminal [
                sprout-caught-criminals 1[
                  set shape "person"
                  set color yellow
                  set size 20
                ]
              ]

              ask target-criminal [
                if (shape = "monster")[
                    die
                  ]
                ]
                ]
              set target nobody
            ]
          ]
          ;If it's still (nobody), that means that no possible patch was found ==> backtrack
          [
            let current-patch [patch-here] of self
            set next-patch last path-back
            set explored-patches lput current-patch explored-patches
          ]
        ]
      ]
    ]
    ; No target: go back to the station
    [
      ifelse (at-station?)
      [
        let possible-patches (patches in-radius 20 with [police-walking-range?])
        if (any? possible-patches) [
          move-to one-of possible-patches
        ]
      ]
      [
        ifelse (length path-back > 0)[
          let last-patch last path-back
          set path-back remove-item ((length path-back) - 1) path-back
          move-to last-patch
        ]
        [
          if ([pcolor] of [patch-here] of self = 95)
          [
            set at-station? true
            set free? true
            set color 0
          ]
          if ([police-walking-range?] of [patch-here] of self = true)
          [
            set at-station? true
            set free? true
            set color 0
            set path-back []
            set explored-patches []
          ]
        ]
      ]
    ]
  ]
  commit-crimes
  manage-cooldowns

  if (count criminals <= 0.2 * (ratio-criminals * population-size))
  [
    stop
  ]
  tick
end

to commit-crimes
  if (count criminals > 0)[
    let potential-criminals criminals with [not on-the-run?]
    if (any? potential-criminals)[

      ask potential-criminals [
      let new-probability count criminals with [on-the-run?] in-radius 50 / count criminals
        if any? patches in-radius 5 with [drug-area?][
          set new-probability new-probability + 0.3
        ]

        ;; police station in area?
        if (any? patches in-radius 50 with [pcolor = 27])[
          set new-probability new-probability - 0.2
        ]

        let count-citizens-in-area count citizens in-radius 50
        if (count-citizens-in-area > 0)[
          set new-probability new-probability + ((count-citizens-in-area * 80) / count citizens)
          if (new-probability >= 1)[
            commit-crime
            set count-crimes-during-tick count-crimes-during-tick + 1
          ]
        ]
      ]
    ]
  ]
end

to manage-cooldowns
  ask criminals with [on-the-run?][
    if (ticks = time-of-crime + cooldown-period)
    [
      set on-the-run? false
      set time-of-crime nobody
      set shape "person"
      set color 15
      set size 14
      ;; TODO change
      set crime-probability 0
      set count-successful-runaways count-successful-runaways + 1
    ]
  ]
end

to commit-crime ;; turtle procedure
  let criminal-to-be-followed self
  ask [patch-here] of self[
    sprout-crimes 1 [
      set shape "flag"
      set color 13
      set size 12
    ]
  ]
  set time-of-crime ticks
  set on-the-run? true
  if (any? policemen with [free?])
  [
    ask min-one-of policemen with [free?] [distance myself] [
      set target criminal-to-be-followed
      set free? false
      set color orange
      set size 20
      set at-station? false
    ]
  ]
  set shape "monster"
  set color orange
  set size 20
end
@#$#@#$#@
GRAPHICS-WINDOW
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BUTTON
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Setup
setup
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population-size
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PLOT
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Crimes per Tick
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N Crimes
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"" ""
PENS
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Busy Police per Tick
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N Police
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"" ""
PENS
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PLOT
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Criminals Stats per Tick
Ticks
N Criminals
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"" ""
PENS
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"Busted" 1.0 0 -7500403 true "" "plot count caught-criminals"
"On the run" 1.0 0 -2674135 true "" "plot count criminals with [on-the-run?]"

TEXTBOX
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11
354
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Crime Spread Simulation
18
0.0
1

MONITOR
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130
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Crimes commited
count crimes
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MONITOR
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284
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Successful runaways
count-successful-runaways
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1
11

@#$#@#$#@
## 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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