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Lisa_Clare
Lisa_Clare

Reputation: 79

Move turtles to vacant patch ahead in NetLogo

I'm struggling to work out how to tell my turtles to move forward 1 onto a vacant patch, once they have already been turned around in a procedure called "turn-turtle".

     let ahead patch-ahead 1
     let vacant-ahead ahead  with [not any? turtles-here ] ;;this line needs fixing 
      if any? turtles      
                   [turn-turtle if vacant-ahead [fd 1]]

It produces this error, which I understand, but can't work out how to fix.

WITH expected input to be an agentset but got the patch (patch 1 -2) instead.
error while solute 2 running WITH
  called by procedure MOVE-TURTLE
  called by procedure GO
  called by Button 'go'

Just replying to some comments in a more readable fashion: Sorry I don't think I explained it very well, as I've just taken a tiny bit of my code out. Maybe this makes more sense. 

to go 
ask turtles 
[move-turtle] 
end 

to move-turtle 
turn-turtle 
if (not any? turtles-on patch-ahead 1) 
[fd 1] 
end

So I just want this code to move the turtles that have been turned with "turn-turtle" to an empty patch ahead 1, preferably taking up the entire patch, like if they were "sprouted". Thanks!

Upvotes: 0

Views: 1011

Answers (1)

Alan
Alan

Reputation: 9610

Sounds like you want to do something a bit different, if you really want ahead to be a single patch. So perhaps

to move
  ifelse (any? turtles-on patch-ahead 1) [
    turn-turtle
  ][
    fd 1
  ]
end

Upvotes: 1

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