给特定品种的汽车提供自己的使用说明

Question

好的，我已经重新建模了一段时间，以演示智能汽车在现实世界的高速公路上的表现。我有一个滑块，可以改变道路上一半汽车的颜色，我希望这些汽车有自己的设置，而其他汽车的行为是相同的。这是改变颜色的代码。

这是汽车品种的设置过程和变量。

cars-own [


If after I run the go procedure and I wanted the specific cars that have their colours changed to go around the road differently either based on the cars speed or the drivers patience to switch lane how do I specifically identify them?

I tried an If statement where I say if the car's colour isn't orange red or yellow do .....
but that doesn't work. 

Answer 1

一种方法是定义另一种汽车，然后让那些改变了颜色的汽车也改变它们的品种。然后，您可以引用所有这类汽车的新品种名称。例如，

breed [cars2 car2]
cars2-own [
the same variables as cars-own
]
....
to set-level-of-autonomy
  let num-change number-of-cars / 2 - count turtles with [color = orange or color = red or color = yellow]
  ask n-of num-change cars
  [ if level-of-autonomy = 0 [set color blue set breed cars2]
    if level-of-autonomy = 1 [set color blue + 1.0 set breed cars2]
    if level-of-autonomy = 2 [set color cyan set breed cars2]
    if level-of-autonomy = 3 [set color turquoise set breed cars2]
    if level-of-autonomy = 4 [set color green set breed cars2]
    if level-of-autonomy = 5 [set color lime set breed cars2]
  ]
end

当cars将它们的breed更改为cars2时，只要这些变量也被列为cars2-own变量，它们“自己的”变量的值就会保持不变。您现在可以分别引用cars和cars2。请注意，如果所有汽车都有五个指定的自主性级别值中的一个，您可以简化一点。

to set-level-of-autonomy
      let num-change number-of-cars / 2 - count turtles with [color = orange or color = red or color = yellow]
      ask n-of num-change cars
      [ if level-of-autonomy = 0 [set color blue]
        if level-of-autonomy = 1 [set color blue + 1.0]
        if level-of-autonomy = 2 [set color cyan]
        if level-of-autonomy = 3 [set color turquoise]
        if level-of-autonomy = 4 [set color green]
        if level-of-autonomy = 5 [set color lime set]
        set breed cars2
      ]
    end

另一种方法是定义一组颜色变化的汽车，而不是新品种的汽车。

globals [changed-cars]
......
let changed-cars no-turtles
........
    to set-level-of-autonomy
          let num-change number-of-cars / 2 - count turtles with [color = orange or color = red or color = yellow]
          ask n-of num-change cars
          [ if level-of-autonomy = 0 [set color blue]
            if level-of-autonomy = 1 [set color blue + 1.0]
            if level-of-autonomy = 2 [set color cyan]
            if level-of-autonomy = 3 [set color turquoise]
            if level-of-autonomy = 4 [set color green]
            if level-of-autonomy = 5 [set color lime set]
            set changed-cars (turtle-set changed-cars self)
          ]
        end

每辆更改的汽车都会将自己放在代理集changed-cars中。现在，cars指的是所有的汽车，而changed-cars只指那些发生了变化的汽车。changed-cars是cars的一个子集。有了breeds，这两个品种就相互独立了。