breed [pigs pig]  ;; defeines a new label for the agent
breed [cats cat]  ;; defeines a new label for the agent

pigs-own [sick?]
;cats-own [dirnum]
patches-own [infected?]
globals [dirnum f pig-enclosure mins hours days inf]

to setup   
  clear-all
  ask patches [ setup-environ 
                set infected? false]
  create-pigs 20     ;; create n pigs
  ask pigs [
  set shape "pig"    ;; define the shape
  set color pink     ;; define the color
  set sick? false
  move-to one-of pig-enclosure] ;;places the pigs at random (integer) points in the pig-enclosure

  create-cats 5
  ask cats [setxy random-pxcor random-pycor  ;;places the pigs at random (integer) points in the environment
  set shape "cat"
  set color black] ;;  and gives them a pig shape
 
  set mins 0
  set hours 0
  set days 0
  
  set inf 0
end
   
;; The above runs the environmental set-up command setup-environ 
;; which sets all the patches to be green 
;; and then calls the draw-boundary command   
 
to setup-environ  ;; assign a color to the environment
  set pcolor green
  draw-boundary
  setup-pig-enclosure
end


to draw-boundary
  ; draw left and right boundary of the farm
  ask patches with [abs pxcor = max-pxcor ]
    [ set pcolor yellow ]
    
  ; draw top and bottom boundary of the farm
  ask patches with [abs pycor = max-pycor ]
    [ set pcolor yellow ]

;;draw the boundary of the pig enclosure    
    ask patches with [pxcor = 0 and pycor <  20 and pycor > -10]
     [ set pcolor brown ] 
        
    ask patches with [pycor = -10 and pxcor <=  0 and pxcor > -20] ;; we use <- 0 to cover the corner
     [ set pcolor brown ] 
      
    
end
 
to setup-pig-enclosure    ;; define the area called "pig-enclosure"
   set pig-enclosure patches with [(pxcor > -20 and pxcor < 0) and (pycor <  20 and pycor > -10)]
   ask patches with [(pxcor > -20 and pxcor < 0) and (pycor <  20 and pycor > -10)]
   [set pcolor 37 
   ] 
end

;; The Go Command
to go

ask pigs [move-pigs
          infect-pigs]

if ((hours mod 6) = 0) AND ((mins mod 1) = 0)[
  ask cats [defecate-cats]
  ] 
ask cats [move-cats]

tick
set mins mins + 1
if ((mins mod 60) = 0)[
set hours hours + 1
set mins 0]

if (hours != 0) AND ((hours mod 24) = 0)[
    set days days + 1 
    set hours 0]

if (days = 60) [
    stop
]
end


;; MOVEMENT COMMANDS

;;Pigs
to move-pigs
  ifelse (random 2 = 0) ;; random 2 gives an answer of 0 or 1 (stay put or move)
  [ 
  fd 0             ;; if random = 0, pig does not move
  ]
  [                ;; if random = 1, pig moves
  set dirnum random 4 ;; pick a number 0 (fwd), 1 (bwd), 2 (left), 3 (right) 
  if (dirnum = 0) []
  if (dirnum = 1) [left 180]
  if (dirnum = 2) [left 90]
  if (dirnum = 3) [right 90]
  
 ask patch-ahead 1 [
 set f ifelse-value (pcolor != 37) [0][ 1 ]]
 fd f
  ] 
end

to infect-pigs
   ask patch-here [if infected? = true [
   if random 2 = 1 [
   set inf 1
   ]
   ]]
   if inf = 1 [set color black
               set sick? true]
               
   set inf 0
end
;;Cats
to move-cats
  ifelse (random 2 = 0) ;; random 2 gives an answer of 0 or 1 (stay put or move)
  [ 
  fd 0             ;; if random = 0, pig does not move
  ]
  [                ;; if random = 1, pig moves
  set dirnum random 4 ;; pick a number 0 (fwd), 1 (bwd), 2 (left), 3 (right) 
  if (dirnum = 0) [fd 1]
  if (dirnum = 1) [fd -1]
  if (dirnum = 2) [left 90 fd 1]
  if (dirnum = 3) [right 90 fd 1]
  ] 
end

to defecate-cats
   
   ask patch-here [if (pcolor != yellow) AND (pcolor != brown) 
   [
   set pcolor red
   set infected? true
   ]]
   
end
@#$#@#$#@
GRAPHICS-WINDOW
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CC-WINDOW
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BUTTON
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@#$#@#$#@
WHAT IS IT?
-----------
This section could give a general understanding of what the model is trying to show or explain.


HOW IT WORKS
------------
This section could explain what rules the agents use to create the overall behavior of the model.


HOW TO USE IT
-------------
This section could explain how to use the model, including a description of each of the items in the interface tab.


THINGS TO NOTICE
----------------
This section could give some ideas of things for the user to notice while running the model.


THINGS TO TRY
-------------
This section could give some ideas of things for the user to try to do (move sliders, switches, etc.) with the model.


EXTENDING THE MODEL
-------------------
This section could give some ideas of things to add or change in the procedures tab to make the model more complicated, detailed, accurate, etc.


NETLOGO FEATURES
----------------
This section could point out any especially interesting or unusual features of NetLogo that the model makes use of, particularly in the Procedures tab.  It might also point out places where workarounds were needed because of missing features.


RELATED MODELS
--------------
This section could give the names of models in the NetLogo Models Library or elsewhere which are of related interest.


CREDITS AND REFERENCES
----------------------
This section could contain a reference to the model's URL on the web if it has one, as well as any other necessary credits or references.
@#$#@#$#@
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@#$#@#$#@
NetLogo 4.0.4
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
@#$#@#$#@
default
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@#$#@#$#@