Vision Cone Example

breed [ wanderers wanderer ]  ;; big red turtle that moves around
breed [ standers stander ]    ;; little gray turtles that just stand there

to setup
  clear-all
  ;; make a background of lots of randomly scattered
  ;; stationary gray turtles
  create-standers 6000
  [
    setxy random-xcor random-ycor
    set color gray
  ]
  ;; make one big red turtle that is going to move around
  create-wanderers 1
  [
    set color red
    set size 15
  ]
  reset-ticks
  ;; make the vision cone initially visible
  go
end 

to go
  ask standers [ set color gray ]
  ask wanderers
  [
    rt random 20
    lt random 20
    fd 1
    ;; could use IN-CONE-NOWRAP here instead of IN-CONE
    ask standers in-cone vision-radius vision-angle
    [
      set color white
    ]
  ]
  tick
end 


; Public Domain:
; To the extent possible under law, Uri Wilensky has waived all
; copyright and related or neighboring rights to this model.