每滴答声释放两只海龟 netlogo

Question

我目前正在研究一个模型，我可以在其中模拟购物时的行人运动。所以，我已经想出了一些我需要的东西，但我一直在试图弄清楚如何在某个补丁中每次释放 2 只海龟（就像一对）。两只海龟同时释放。我的代码基于蚂蚁线，但它只是一次性释放所有行人，然后海龟开始行走。所有海龟都被释放后，蜱虫也会开始。我希望海龟在进入时开始“行走”。 这是我的代码：

breed [ leadvisitors leadvisitor ]
breed [ visitors visitor ]

to setup
  clear-all
   setup-visitors
reset-ticks
end

to setup-visitors 
  create-leadvisitors num-of-pedestrians * 0.1    ;;create 10% of the total number of pedestrians
  [ 
    set demand-type "none"
    set color black
    set size 1
    setxy 0 16
    set heading 180
    set pen-size 1
    set destination one-of patches
    set wait-time -1
    set demand-lvl 0    
  ]
  create-visitors (num-of-pedestrians - (num-of-pedestrians * 0.1)) 
  [ set demand-type 0
    set size 1
    setxy 0 16
    set heading 180
    set pen-size 1
    set destination one-of patches
    set wait-time -1
    set demand-lvl 1
    set attracted? false
  ]  ]
end

to go
  if turtles = 0  [ stop ]

  ask turtles 
  [ 
    set-demand-type  
    have-demand
  ]  


  if ticks > 100 [ stop ]
  tick
  display-labels
end

;;;;; visitor's internal state of demand ;;;;;

to set-demand-type
  if demand-type = 0
  [ set demand-type "food"
    set color red
    let target (patches in-cone visitor-vision-depth visitor-view-angle) with [pcolor = red] 
  ]
end 

to have-demand  
  if demand-lvl = 0 
  [
    ifelse wait-time = -1 
    [ stroll ]

    [ set wait-time wait-time - 1
      if wait-time = 0
      [ stroll ]]
    ]

  if demand-lvl = 1
    [ ifelse wait-time = -1 
      [ stroll
        evaluate ]

      [ set wait-time wait-time - 1
        if wait-time = 0
        [ stroll 
          evaluate ]] 
    ] 
end 

to stroll 
if any? neighbors with [ pcolor = gray - 3 ]
  [ die ]

  ifelse any? neighbors with [ pcolor = gray or pcolor = orange or pcolor = blue or pcolor = red]
  [ facexy exitpt-x exitpt-y ]
  [ rt random-float visitor-view-angle lt random-float visitor-view-angle ]
  fd walking-speed  
end

to evaluate 
  if any? neighbors with [ pcolor = gray or pcolor = orange or pcolor = blue or pcolor = gray - 4 or pcolor = gray - 3 or pcolor = red + 2]
  [ facexy exitpt-x exitpt-y 
    rt random-float visitor-view-angle lt random-float visitor-view-angle 
    fd walking-speed ]

  let _mycolor color
  if any? (patches in-cone visitor-vision-depth visitor-view-angle) with [pcolor = _mycolor]
  [ let new-target max-one-of ( patches with [pcolor = _mycolor] in-cone visitor-vision-depth visitor-view-angle) [patch-influence]
    let dist-to-new-target min-one-of (patches with [pcolor = _mycolor] in-cone visitor-vision-depth visitor-view-angle) [distance myself]
    face new-target
    set heading towards new-target
    fd walking-speed   
    set attracted? true       

    attracted-and-visiting
    re-evaluate 
   ]


end 

to attracted-and-visiting        
   if pcolor = red + 2
   [ set heading towards one-of patches with [pcolor = red + 2]
     fd 0
     set patch-popularity patch-popularity + 1
     set wait-time avg-waiting-time 

    if count turtles-here > 0
        [ set num-of-visitors num-of-visitors + 1 ]
          set plabel num-of-visitors 
   ]      
end


to re-evaluate
  let _mycolor color
  if not any? (patches in-cone visitor-vision-depth visitor-view-angle) with [pcolor = _mycolor]
  [ set attracted? false ]

  ifelse choose? [set heading towards one-of patches with [pcolor = _mycolor]] [facexy exitpt-x exitpt-y]    
end


to-report choose?
  report random 2 = 0
end

Answer 1

由于我们来回的 cmets，让我来看看你在寻找什么。我假设您想在运行开始时创建leadvisitors，然后随着运行的进行在每个滴答声中添加两个visitors。如果是这样，那么您的 setup 过程将类似于

globals [num-visitors-created]

to setup
  clear-all
  set num-visitors-created 0
  create-leadvisitors num-of-pedestrians * 0.1  [
    set demand-type "none"
    set color black
    set size 1
    setxy 0 16
    set heading 180
    set pen-size 1
    set destination one-of patches
    set wait-time -1
    set demand-lvl 0
    set num-visitors-created num-visitors-created + 1
  ]
  reset-ticks
end

创建您的leadvisitors，但没有创建visitors。请注意，全局变量 num-visitors-created 会跟踪创建的 leadvisitors 和 visitors 的数量，每次创建 leadvisitor 或 visitor 时递增一。

在您的go 过程中，您将在每个刻度上创建两个访问者，直到创建的visitors 和leadvisitors 的总数达到num-of-pedestrians。 （如果只有一个新访客的空间，您希望只创建一个，还是需要成对创建？我假设是后者。）因为您不希望访客死亡为新的打开空间，我们测试创建的数字，而不是仍然存在的数字。

to go
  if turtles = 0  [ stop ]

  ; create a new pair of visitors if there is room.
  if num-visitors-created <= (num-of-pedestrians - 2)
    create-visitors 2 [ 
      set demand-type 0
      set size 1
      set heading 180
      set pen-size 1
      setxy 0 16
      set destination one-of patches
      set wait-time -1
      set demand-lvl 1
      set attracted? false
      set num-visitors-created num-visitors-created + 1
    ]

  ask turtles 
  [ 
    set-demand-type  
    have-demand
  ]

  if ticks > 100 [ stop ]
  tick
  display-labels
end

（既然leadvisitors似乎也可能死掉，你想保持leadvisitors的某个最小数量或比例吗？如果是，你应该开一个新问题。）

上面的代码将在每次报价时在patch 0 16 上创建一对新的visitors。但是，如果您想在不同的补丁上创建新的visitors，比如红色补丁之一，您可以在您的go 程序中将该补丁sprout 设置为新访问者。

  ask one-of patches with [pcolor = red] [
    sprout-visitors 2 [ 
      set demand-type 0
      set size 1
      set heading 180
      set pen-size 1
      set destination one-of patches
      set wait-time -1
      set demand-lvl 1
      set attracted? false
      set num-visitors-created num-visitors-created + 1
    ]
  ]

注意这里没有设置新访客的 xy 坐标，所以他们从萌芽他们的补丁开始。