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Magellancruiser
Magellancruiser

Reputation: 21

Coloring a route in Netlogo

I want some of my turtles to leave at trace of the steps they make. I want them to change the color of the patches they pass by on their move. Similar to what the "pen-down" command does - just with the effect, that the patches change color. It is esay for me to change the color of the patch, the turtle reach - but I want all the patches colored - like if you were walking on a lawn, and the grass under you momentaneouesly turns red :-) Nut just the steps with every tick, but the continous route. Is there a way? I would be glad to se a small coded example. Thanks very much - this homepage does a great job. Magellancruiser

Upvotes: 0

Views: 277

Answers (1)

Jasper
Jasper

Reputation: 2780

Here is one basic solution. The key is realizing that instead of having the turtle do something like forward (random 10) + 1 you can instead have it go forward 1 a number of times equal to (random 10) + 1. Because the distances are based on path sizes (1 = 1 patch across), if you color the patches as you go forward 1 at a time, you should "draw" the color on the patch.

turtles-own [ my-color ]

to setup
  clear-all
  create-turtles 10 [ 
    set my-color color ; the turtles will have random colors, store them to use later
    set color white ; but they're easier to see if they're white
  ]
  reset-ticks
end

to go 
  ask one-of turtles [
    left (random 50) - 25 ; wiggle a bit to not just go in a straight line
    let d (random 10) + 1 ; the turtle will move 1 to 10 steps
    repeat d [
      forward 1
      set pcolor my-color ; the turtle can directly set the patch's pcolor variable to its own
    ]
  ]

  tick
end

You can either use setup and go from the command center or add buttons for them.

Upvotes: 1

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