simulation - NetLogo 代理移动问题

Question

我实际上正在开发一个模拟来研究社会现象。我的想法是一群特工选择离他们最近的工厂，向前走并（当他们到达时）回到他们的初始位置。但是，我在编程时遇到了一些麻烦。一些特工只是经过他们的初始位置并到达我的模拟边界，停在那里。

这是我的代码：

breed [population person] ;create the population
breed [all-fac factory] ;create the factories

população-own [
  myneighbor ;defines which factory is closer
  myNND ;calculate the distance between the person and the closer factory
  home-x ;initial x position
  home-y ;initial y position
]

to setup
  clear-all
  reset-ticks
  create-population 83 ; creates the population with 83 people in it
  [
    setxy random-xcor random-ycor ; set people initial position randomly 
    set shape "person"
    set home-x xcor 
    set home-y ycor
  ]
  create-all-fac 9
  [
    ask all-fac [ set color white] 
    ask facture 83 [ setxy 0 0 ] ; defines the initial position of every factory
    ask facture 84 [ setxy 70 0] 
    ask facture 85 [ setxy -70 0 ]
    ask facture 86 [ setxy 70 70 ]
    ask facture 87 [ setxy 0 70 ]
    ask facture 88 [ setxy -70 70 ]
    ask facture 89 [ setxy 70 -70 ]
    ask facture 90 [ setxy 0 -70 ]
    ask facture 91 [ setxy -70 -70 ]
    set shape "house"
  ]
end

to go
    move
    tick
    choose-facture

end

to choose-facture
   ask population [
    set myneighbor min-one-of other fábricas [distance myself] ; choose my nearest neighbor based on distance
    set myNND distance myneighbor
  ]
end



to move
  ask population [
  if xcor = home-x and ycor = home-y [
      face myneighbor
      fd 1
    ]
   if any? all-fac in-radius 5 [
   facexy home-x home-y 
    fd 1 ] 
    fd 1
  ]
end 

如果有人可以帮助我，我将非常感激:)。

标签： simulationnetlogoagent

Answer 1

亚瑟！

您的代码几乎是正确的！

为了保持一致性，我更改了名称，以修复一些错别字。

我重新排列了 go 步骤中的命令，以便它们在移动之前而不是之后检查它们的位置。通常我们将“tick”作为 go 过程中的最后一个语句。

我手动将视图重置为 max-xcor 和 max-ycor 100，并关闭包装，因此工厂位于视图内，并将补丁大小设置为 3 而不是 13，因此视图适合我的笔记本电脑小屏幕。

最后，我将某人是否在家的测试更改为他们是否在距离家 5 以内，而不是他们是否完全在家——就像你在工厂使用的测试一样。

通过这些更改，代码似乎可以按照您的意愿行事——人们一遍又一遍地步行到工厂然后回家。没有人卡在视图的边界上。

;; NOTE -- the view has been changed to shut off horizontal and vertical wrapping
;; and max-pxcor = max-pycor = 100
;; and patch-size = 3 pixels, not 13
;; so population and factory size have been increased.


breed [population person] ;create the population
breed [all-fac factory] ;create the factories

;;população-own [
  population-own [
  myneighbor ;defines which factory is closer
  myNND ;calculate the distance between the person and the closer factory
  home-x ;initial x position
  home-y ;initial y position
]

to setup
  clear-all
  reset-ticks
 create-population 83 ; creates the population with 83 people in it

  [
    setxy random-xcor random-ycor ; set people initial position randomly 
    set shape "person"
    set home-x xcor 
    set home-y ycor
    set size 5
  ]
  create-all-fac 9
  [
    ask all-fac [ set color white] 
    ask factory 83 [ setxy 0 0 ] ; defines the initial position of every factory
    ask factory 84 [ setxy 70 0] 
    ask factory 85 [ setxy -70 0 ]
    ask factory 86 [ setxy 70 70 ]
    ask factory 87 [ setxy 0 70 ]
    ask factory 88 [ setxy -70 70 ]
    ask factory 89 [ setxy 70 -70 ]
    ask factory 90 [ setxy 0 -70 ]
    ask factory 91 [ setxy -70 -70 ]
    set shape "house"
    set size 5
  ]
end

to go
    choose-factory  ;;  moved this command up from below tick
    move
    tick
   ;; choose-factory

end

to choose-factory
   ask population [
    set myneighbor min-one-of all-fac [distance myself] ; choose my nearest neighbor based on distance
    set myNND distance myneighbor
  ]
end



to move
  ask population [
 ;; if xcor = home-x and ycor = home-y [   ;;<<<<<<<<<<<<<<<<<<<< replaced this test
    if (distancexy home-x home-y) <= 5 [
      face myneighbor
      fd 1
    ]
   if any? all-fac in-radius 5 [
   facexy home-x home-y 
    fd 1 ] 
      fd 1
  ]
end 

最后一个建议。你写的代码很“脆弱”，因为如果你把人数改为 5 等更小的数字，为了测试，任何地方都没有工厂 #83 可以设置，代码就会崩溃。

您可能希望有一些滑块来设置人数，并希望您的代码继续为任意数量的人工作。

此外，定位所有工厂需要很多线。有什么好办法短小精悍，但是换人数也不会断？

这是一些执行此操作的代码。它在创建工厂时会列出工厂列表，因此它会列出刚刚创建的 9 个工厂的编号。

然后，它会在列表中找到那些并使用这些数字来定位工厂。

有用。这是修改后的代码部分：

 let factory-list []  ;; make an empty list
  create-all-fac 9
  [ 
    set shape "house"
    set color white
    set size 5
    set factory-list fput who factory-list  ; add this factory to the growing list
  ]  

  ;; OK, now we have a list of all 9 factories.
  ;; Confirm that by printing it

  print "here is the list of who-numbers of the new factories:"
  show factory-list

  ;; now we need to insert those numbers into the following commands:

    ask factory item 0 factory-list [ setxy 0 0 ] ; defines the initial position of every factory
    ask factory item 1 factory-list [ setxy 70 0] 
    ask factory item 2 factory-list [ setxy -70 0 ]
    ask factory item 3 factory-list [ setxy 70 70 ]
    ask factory item 4 factory-list [ setxy 0 70 ]
    ask factory item 5 factory-list [ setxy -70 70 ]
    ask factory item 6 factory-list [ setxy 70 -70 ]
    ask factory item 7 factory-list [ setxy 0 -70 ]
    ask factory item 8 factory-list [ setxy -70 -70 ]