Netlogo 将世界分为上层和下层

Question

大家下午好：目前我正在 Netlogo 中的一个程序中工作，我想将世界划分为上象限和下象限，并让海龟移动到上象限。我已经从这里回答的上一个问题中找出如何将世界划分为四个象限，但我不知道如何将其划分为两个。

非常感谢您的帮助

ask patches with [ pxcor <= max-pxcor and pxcor > 0  and pycor > 0]
  [
    set pcolor red
    set quadrant 1

  ]

  ask patches with [ pxcor >= min-pxcor and pxcor < 0  and pycor > 0]
  [
    set pcolor blue
    set quadrant 2
  ]

  ask patches with [ pxcor <= max-pxcor and pxcor > 0  and pycor < 0]
  [
    set pcolor green
    set quadrant 3
  ]

  ask patches with [ pxcor >= min-pxcor and pxcor < 0  and pycor < 0]
  [
    set pcolor yellow
    set quadrant 4
  ]

Answer 1

鉴于您对下象限和上象限感兴趣，您只需要查看 y 坐标。具体情况取决于你的世界原点（即坐标[0;0]）在哪里。

如果您的世界原点位于默认位置，即中心，则执行：

patches-own [
 quadrant 
]

to setup
  clear-all
  ask patches [
   ifelse (pycor > 0)
    [set quadrant 1]
    [set quadrant 2]
  ]
end

如果你的世界原点在一个角落里（例如，我假设在这种情况下是左下角），只需这样做：

patches-own [
 quadrant 
]

to setup
  clear-all
  ask patches [
   ifelse (pycor > max-pycor / 2)
    [set quadrant 1]
    [set quadrant 2]
  ]
end

如果您事先不知道您的世界起源在哪里，或者如果您的世界起源与上述两个示例相比不太常见，您可以采用适合任何情况的更通用的方法：

patches-own [
 quadrant 
]

to setup
  clear-all
  
  let y-extent (max-pycor - min-pycor + 1)
  ask patches [
   ifelse (pycor > y-extent / 2)
    [set quadrant 1]
    [set quadrant 2]
  ]
end

Netlogo 将世界分为上层和下层

Netlogo divide world into upper and lower

netlogo