为代理创建瓶颈障碍

问题描述

我正在尝试创建一个补丁，它将成为海龟必须经过的路径中间的瓶颈结构。

我已经创建了抛物线，但我想添加一个滑块，以便可以更改瓶颈的大小，但我不知道如何创建可以移动它的代码。

这是代码（我对抛物线的数学很不擅长，所以我得到了顶部的帮助，我只是手动创建了向下的）

onpressed: () async {
  final qrCodeScannerBloc = BlocProvider.of<QrCodeScannerBloc>(context);

  Navigator.pop(context);

  final String qrCodeResponse =
      await FlutterBarcodeScanner.scanBarcode(
          '#FF6666','cancel'.tr(),true,ScanMode.QR);

  qrCodeScannerBloc.add(GetQrCodeResponseEvent(qrCodeResponse));
  …
},

有人可以帮忙吗？

解决方法

给你。这假设您有一个名为 setup 的按钮以及范围从 0 到 11 的可变“宽度”滑块。

我在您设置红色和绿色的顶部附近添加了“询问补丁 []”。


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


to setup-road
  ;; patch procedure
  ;; colour patches to paint a horizontal road

  let bound (max-pycor / 3)
  
  ask patches [
       ifelse (pycor < (max-pycor  - bound)) and (pycor > (min-pycor + bound))
       [ set pcolor red - 3 ]
       [ set pcolor green ]
  ]
  
  let upper-road-bound (max-pycor  - bound - 2 )
  let lower-road-bound (min-pycor  + bound + 2 )
  
  
  setup-top-parabola-on-road
  setup-down-parabola-on-road
end
;; I want to be able to expand the parabolas so that the opening between them will be wider as well as narrow according a slider.
to setup-top-parabola-on-road
  ask patches with
  [pxcor > -25 and pxcor < 25] [
     if pycor > ((pxcor ^ 2) / 20 + width)
    [ set pcolor blue  ]
    ]
end

to setup-down-parabola-on-road
 ask patches with
  [pxcor > -25 and pxcor < 25] [
     if pycor <   (-1 * (pxcor ^ 2) / 20) - width + 1   
    [ set pcolor yellow  ]
    ]

   
end

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