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Netlogo: [CODE] Asking patches directly behind you to change colour

NETLOGO: Storing and using the value of a variable in the last 3 ticksasking red turtles to avoid other turtles and move to one of its neighbor which is empty and has highest concunable to make non-stationary turtles change their direction if an obstacle a patch aheadNetLogo: avoid to have too many beetles on one patch in one time step?Changing patch colors except one colorHow to ask turtles to avoid a patch with specific color at patch-ahead 1 but turtles move forward by bigger number (not fd 1) in one step in NetLogoHow to check if any turtle ahead “in a same patch” not in a patch aheadNetLogo: How to make a turtle recognise any shade of one color?How to limit number of turtles in a patch in NetLogoNetlogo: Creating a square area of patches in the center of the gridSnake game: How to increase the length of a snake body based on the amount of food eaten?

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

0

I am trying to create a game and what I want to do is make the patch behind the turtle to change its color as soon as the turtle eats a fruit. So the turtle moves and eats fruits. Upon eating one fruit, the patch behind the one it is on will change color but this color will move with the turtle so as to create the effect of an increasing length/size of the turtle

Now, I have tried working with the code:

ask turtles
[ if score = 10
 [ ask patch-ahead -1
 [ set pcolor yellow
 ]
 ]
]

The problem with this is that as the turtle keeps on moving, the whole path gets coloured yellow instead of the patch that is right behind its current location. Is there any code to get around this problem? Also, as it eats another fruit, I want the two patches behind it with the colour yellow. So how do I code this?

netlogo agent-based-modeling

share|improve this question

edited Mar 28 at 0:25

JenB

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asked Mar 27 at 12:58

A.AsadA.Asad

11133 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please provide minimal reproducible code snippet for others to look at so that one can help.
  
  – nircraft
  Mar 27 at 14:20
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  So you want the trail to move with the turtle? That is, the patch changes back to its original colour as the turtle moves away rather than showing where the turtle has been?
  
  – JenB
  Mar 28 at 0:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yes! That's what I want. So if the turtle has eaten one fruit it will have a trail of length 1 which will move with it and that trail will be the patch behind it in colour yellow. Can you please help? Thank you!
  
  – A.Asad
  Mar 28 at 6:54
  

  
  
  
  

add a comment | 

0

I am trying to create a game and what I want to do is make the patch behind the turtle to change its color as soon as the turtle eats a fruit. So the turtle moves and eats fruits. Upon eating one fruit, the patch behind the one it is on will change color but this color will move with the turtle so as to create the effect of an increasing length/size of the turtle

Now, I have tried working with the code:

ask turtles
[ if score = 10
 [ ask patch-ahead -1
 [ set pcolor yellow
 ]
 ]
]

The problem with this is that as the turtle keeps on moving, the whole path gets coloured yellow instead of the patch that is right behind its current location. Is there any code to get around this problem? Also, as it eats another fruit, I want the two patches behind it with the colour yellow. So how do I code this?

netlogo agent-based-modeling

share|improve this question

edited Mar 28 at 0:25

JenB

10k11 gold badge1111 silver badges3737 bronze badges

asked Mar 27 at 12:58

A.AsadA.Asad

11133 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please provide minimal reproducible code snippet for others to look at so that one can help.
  
  – nircraft
  Mar 27 at 14:20
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  So you want the trail to move with the turtle? That is, the patch changes back to its original colour as the turtle moves away rather than showing where the turtle has been?
  
  – JenB
  Mar 28 at 0:27
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Yes! That's what I want. So if the turtle has eaten one fruit it will have a trail of length 1 which will move with it and that trail will be the patch behind it in colour yellow. Can you please help? Thank you!
  
  – A.Asad
  Mar 28 at 6:54
  

  
  
  
  

add a comment | 

I am trying to create a game and what I want to do is make the patch behind the turtle to change its color as soon as the turtle eats a fruit. So the turtle moves and eats fruits. Upon eating one fruit, the patch behind the one it is on will change color but this color will move with the turtle so as to create the effect of an increasing length/size of the turtle

Now, I have tried working with the code:

ask turtles
[ if score = 10
 [ ask patch-ahead -1
 [ set pcolor yellow
 ]
 ]
]

The problem with this is that as the turtle keeps on moving, the whole path gets coloured yellow instead of the patch that is right behind its current location. Is there any code to get around this problem? Also, as it eats another fruit, I want the two patches behind it with the colour yellow. So how do I code this?

netlogo agent-based-modeling

share|improve this question

edited Mar 28 at 0:25

JenB

10k11 gold badge1111 silver badges3737 bronze badges

asked Mar 27 at 12:58

A.AsadA.Asad

11133 bronze badges

ask turtles
[ if score = 10
 [ ask patch-ahead -1
 [ set pcolor yellow
 ]
 ]
]

share|improve this question

edited Mar 28 at 0:25

JenB

10k11 gold badge1111 silver badges3737 bronze badges

asked Mar 27 at 12:58

A.AsadA.Asad

11133 bronze badges

share|improve this question

edited Mar 28 at 0:25

JenB

10k11 gold badge1111 silver badges3737 bronze badges

asked Mar 27 at 12:58

A.AsadA.Asad

11133 bronze badges

edited Mar 28 at 0:25

JenB

10k11 gold badge1111 silver badges3737 bronze badges

edited Mar 28 at 0:25

JenB

10k11 gold badge1111 silver badges3737 bronze badges

asked Mar 27 at 12:58

A.AsadA.Asad

11133 bronze badges

asked Mar 27 at 12:58

A.AsadA.Asad

11133 bronze badges

1 Answer
1

active

oldest

votes

2

So are you after a game like Snake? You could give the patches a memory variable so they can track how long it has been since the turtle passed over them. If this memory value is modified by the current 'size' of the snake body (based on how many fruit it has consumed) you can have the patches stay colored for longer. Below is a simple version (without controls, the snake just has random movement):

patches-own [ mem ]
breed [ snakes snake ]
breed [ fruits fruit ]

snakes-own [ tail-len ]

to setup
 ca
 create-snakes 1 [
 set color white
 set tail-len 1
 face one-of neighbors4
 ask patch-here [
 set pcolor [pcolor] of myself
 ]
 ]
 create-fruits 30 [
 move-to one-of patches
 set shape "flower"
 ]
 reset-ticks
end

to go
 ask snakes [
 if random-float 1 < 0.05 [
 rt one-of [ 90 -90 ]
 ]
 if [ pcolor ] of patch-ahead 1 = white [
 stamp
 die
 ]
 move-to patch-ahead 1
 ask patch-ahead -1 [
 set pcolor [color] of myself
 set mem [tail-len] of myself + 1
 ]
 if any? fruits-here [
 ask fruits-here [ die ]
 set tail-len tail-len + 1
 ]
 ]
 if not any? snakes [
 print "The snake tried to eat itself."
 stop
 ]
 ask patches with [ mem > 0 ] [
 set mem mem - 1
 if mem = 0 [
 set pcolor black
 ]
 ]
 tick
end

share|improve this answer

edited Mar 29 at 19:56

answered Mar 29 at 19:48

Luke CLuke C

8,13711 gold badge99 silver badges1515 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you so much!! I figured my way around this :). Can you please please help me with this? stackoverflow.com/q/55652441/11265312 I'd really appreciate it if you could!
  
  – A.Asad
  Apr 12 at 13:18
  
  

  
  
  
  

add a comment | 

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2

So are you after a game like Snake? You could give the patches a memory variable so they can track how long it has been since the turtle passed over them. If this memory value is modified by the current 'size' of the snake body (based on how many fruit it has consumed) you can have the patches stay colored for longer. Below is a simple version (without controls, the snake just has random movement):

patches-own [ mem ]
breed [ snakes snake ]
breed [ fruits fruit ]

snakes-own [ tail-len ]

to setup
 ca
 create-snakes 1 [
 set color white
 set tail-len 1
 face one-of neighbors4
 ask patch-here [
 set pcolor [pcolor] of myself
 ]
 ]
 create-fruits 30 [
 move-to one-of patches
 set shape "flower"
 ]
 reset-ticks
end

to go
 ask snakes [
 if random-float 1 < 0.05 [
 rt one-of [ 90 -90 ]
 ]
 if [ pcolor ] of patch-ahead 1 = white [
 stamp
 die
 ]
 move-to patch-ahead 1
 ask patch-ahead -1 [
 set pcolor [color] of myself
 set mem [tail-len] of myself + 1
 ]
 if any? fruits-here [
 ask fruits-here [ die ]
 set tail-len tail-len + 1
 ]
 ]
 if not any? snakes [
 print "The snake tried to eat itself."
 stop
 ]
 ask patches with [ mem > 0 ] [
 set mem mem - 1
 if mem = 0 [
 set pcolor black
 ]
 ]
 tick
end

share|improve this answer

edited Mar 29 at 19:56

answered Mar 29 at 19:48

Luke CLuke C

8,13711 gold badge99 silver badges1515 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you so much!! I figured my way around this :). Can you please please help me with this? stackoverflow.com/q/55652441/11265312 I'd really appreciate it if you could!
  
  – A.Asad
  Apr 12 at 13:18
  
  

  
  
  
  

add a comment | 

2

So are you after a game like Snake? You could give the patches a memory variable so they can track how long it has been since the turtle passed over them. If this memory value is modified by the current 'size' of the snake body (based on how many fruit it has consumed) you can have the patches stay colored for longer. Below is a simple version (without controls, the snake just has random movement):

patches-own [ mem ]
breed [ snakes snake ]
breed [ fruits fruit ]

snakes-own [ tail-len ]

to setup
 ca
 create-snakes 1 [
 set color white
 set tail-len 1
 face one-of neighbors4
 ask patch-here [
 set pcolor [pcolor] of myself
 ]
 ]
 create-fruits 30 [
 move-to one-of patches
 set shape "flower"
 ]
 reset-ticks
end

to go
 ask snakes [
 if random-float 1 < 0.05 [
 rt one-of [ 90 -90 ]
 ]
 if [ pcolor ] of patch-ahead 1 = white [
 stamp
 die
 ]
 move-to patch-ahead 1
 ask patch-ahead -1 [
 set pcolor [color] of myself
 set mem [tail-len] of myself + 1
 ]
 if any? fruits-here [
 ask fruits-here [ die ]
 set tail-len tail-len + 1
 ]
 ]
 if not any? snakes [
 print "The snake tried to eat itself."
 stop
 ]
 ask patches with [ mem > 0 ] [
 set mem mem - 1
 if mem = 0 [
 set pcolor black
 ]
 ]
 tick
end

share|improve this answer

edited Mar 29 at 19:56

answered Mar 29 at 19:48

Luke CLuke C

8,13711 gold badge99 silver badges1515 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you so much!! I figured my way around this :). Can you please please help me with this? stackoverflow.com/q/55652441/11265312 I'd really appreciate it if you could!
  
  – A.Asad
  Apr 12 at 13:18
  
  

  
  
  
  

add a comment | 

So are you after a game like Snake? You could give the patches a memory variable so they can track how long it has been since the turtle passed over them. If this memory value is modified by the current 'size' of the snake body (based on how many fruit it has consumed) you can have the patches stay colored for longer. Below is a simple version (without controls, the snake just has random movement):

patches-own [ mem ]
breed [ snakes snake ]
breed [ fruits fruit ]

snakes-own [ tail-len ]

to setup
 ca
 create-snakes 1 [
 set color white
 set tail-len 1
 face one-of neighbors4
 ask patch-here [
 set pcolor [pcolor] of myself
 ]
 ]
 create-fruits 30 [
 move-to one-of patches
 set shape "flower"
 ]
 reset-ticks
end

to go
 ask snakes [
 if random-float 1 < 0.05 [
 rt one-of [ 90 -90 ]
 ]
 if [ pcolor ] of patch-ahead 1 = white [
 stamp
 die
 ]
 move-to patch-ahead 1
 ask patch-ahead -1 [
 set pcolor [color] of myself
 set mem [tail-len] of myself + 1
 ]
 if any? fruits-here [
 ask fruits-here [ die ]
 set tail-len tail-len + 1
 ]
 ]
 if not any? snakes [
 print "The snake tried to eat itself."
 stop
 ]
 ask patches with [ mem > 0 ] [
 set mem mem - 1
 if mem = 0 [
 set pcolor black
 ]
 ]
 tick
end

share|improve this answer

edited Mar 29 at 19:56

answered Mar 29 at 19:48

Luke CLuke C

8,13711 gold badge99 silver badges1515 bronze badges

patches-own [ mem ]
breed [ snakes snake ]
breed [ fruits fruit ]

snakes-own [ tail-len ]

to setup
 ca
 create-snakes 1 [
 set color white
 set tail-len 1
 face one-of neighbors4
 ask patch-here [
 set pcolor [pcolor] of myself
 ]
 ]
 create-fruits 30 [
 move-to one-of patches
 set shape "flower"
 ]
 reset-ticks
end

to go
 ask snakes [
 if random-float 1 < 0.05 [
 rt one-of [ 90 -90 ]
 ]
 if [ pcolor ] of patch-ahead 1 = white [
 stamp
 die
 ]
 move-to patch-ahead 1
 ask patch-ahead -1 [
 set pcolor [color] of myself
 set mem [tail-len] of myself + 1
 ]
 if any? fruits-here [
 ask fruits-here [ die ]
 set tail-len tail-len + 1
 ]
 ]
 if not any? snakes [
 print "The snake tried to eat itself."
 stop
 ]
 ask patches with [ mem > 0 ] [
 set mem mem - 1
 if mem = 0 [
 set pcolor black
 ]
 ]
 tick
end

share|improve this answer

edited Mar 29 at 19:56

answered Mar 29 at 19:48

Luke CLuke C

8,13711 gold badge99 silver badges1515 bronze badges

answered Mar 29 at 19:48

Luke CLuke C

8,13711 gold badge99 silver badges1515 bronze badges

answered Mar 29 at 19:48

Luke CLuke C

8,13711 gold badge99 silver badges1515 bronze badges