MyxococusVsEColi

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turtles-own[nearest-neighbour-coli nearest-neighbour-cocos neighbours-coli neighbours-cocos]
breed [mixococos mixococo]
breed [ecolis ecoli]

to setup
  clear-all
  reset-ticks
  ask patches [set pcolor cyan]
  create-mixococos 10000 [set shape "circle" set color red - 2 setxy random-xcor random-ycor ]
  create-ecolis 100000 [set shape "circle 2" set color red setxy random-xcor random-ycor]
end 

to go
   ask ecolis [cluster-coli move]
  ask mixococos [cluster-cocos move]; eat ]
  ;tick
end 

to move
 ; rt random-float 360
  fd 1
end 

to-report average-heading-towards-neighbours-coli  ;; turtle procedure
  ;; "towards myself" gives us the heading from the other turtle
  ;; to me, but we want the heading from me to the other turtle,
  ;; so we add 180
  ifelse any? other ecolis in-radius 5[
  let x-component mean [sin (towards myself + 45)] of neighbours-coli
  let y-component mean [cos (towards myself + 45)] of neighbours-coli
  ifelse x-component = 0 and y-component = 0
    [ report heading ]
    [ report atan x-component y-component ]][report heading]
end 

to-report average-heading-towards-neighbours-cocos  ;; turtle procedure
  ;; "towards myself" gives us the heading from the other turtle
  ;; to me, but we want the heading from me to the other turtle,
  ;; so we add 180
  ifelse any? other mixococos in-radius 5[
  let x-component mean [sin (towards myself + 45)] of neighbours-cocos
  let y-component mean [cos (towards myself + 45)] of neighbours-cocos
  ifelse x-component = 0 and y-component = 0
    [ report heading ]
    [ report atan x-component y-component ]][report heading]
end 

to cluster-coli
  set neighbours-coli other ecolis in-radius 5
  ;set neighbours-cocos other mixococos in-radius 5
  set nearest-neighbour-coli min-one-of neighbours-coli [distance myself]
  ;set nearest-neighbour-cocos min-one-of neighbours-cocos [distance myself]
  turn-towards average-heading-towards-neighbours-coli 45
end 

to cluster-cocos
  ;set neighbours-coli other ecolis in-radius 5
  set neighbours-cocos other mixococos in-radius 5
  ;set nearest-neighbour-coli min-one-of neighbours-coli [distance myself]
  set nearest-neighbour-cocos min-one-of neighbours-cocos [distance myself]
  turn-towards average-heading-towards-neighbours-cocos 45
end 

to turn-towards [new-heading max-turn]  ;; turtle procedure
  turn-at-most (subtract-headings new-heading heading) max-turn
end 

to turn-away [new-heading max-turn]  ;; turtle procedure
  turn-at-most (subtract-headings heading new-heading) max-turn
end 

to turn-at-most [turn max-turn]  ;; turtle procedure
  ifelse abs turn > max-turn
    [ ifelse turn > 0
        [ rt max-turn ]
        [ lt max-turn ] ]
    [ rt turn ]
end 

to eat
  let prey one-of ecolis in-radius 2
  ;turn-towards average-heading-towards-neighbours-coli 45
  if prey != nobody  [
    ask prey [ die ]
    ];[cluster-cocos move]
end 

There is only one version of this model, created almost 5 years ago by Augusto Cabrera-Becerril.

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