CODEWITHSUNDEEP
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Knarf
Knarf

Reputation: 147

Netlogo how to remove one turtle if it touches another one

We are working on a netlogo model in which fishes are hunted and eaten by shark. It is built on the flocking 3d - alternate model.

At the moment we have the sharks able to follow the fishes, but we can't figure out how to make them eat them. Right now the fishes die when they touch each other:

ask fishes
  [ flock
    ;; if we've hit something
    ;; we're a goner
    if pcolor != black   [ hatch-dead-fishes 1
      [ bk 1 ]
      die ]
  ]

What we want is something like: 

ask fishes
  [ flock
    if xcor and ycor and zcor of shark == xyz cor of a fish   
      [ hatch-dead-fishes 1
      [ bk 1 ]
      die ]
  ]

Now clearly we don't know how to properly write this code. We also noticed that when a fish dies it doesn't actually get removed from the screen. Anyone know

Any help would be welcome! Thanks :)

Upvotes: 2

Views: 1647

Answers (1)

King-Ink
King-Ink

Reputation: 2096

Your fish are most likely disappearing they are just being replaced by hatch-dead-fish.

to have the sharks eat the fish I have found that 

ask sharks [ask fish-here [die]]

(assuming fish and sharks are two breeds if they are not you should make them two breeds)

changing your code to do about the same thing is much longer

ask fishes
[ flock
if pxcor = [pxcor] of shark and pycor = [pycor] of shark and pzcor = [pzcor] of          shark 
    [ hatch-dead-fishes 1
    [ bk 1 ]
  die ]
]

I took the liberty of changing the coordinates to patch rather than turtles because it is really hard to get a collision on floating-points

Upvotes: 3

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