NetLogo：选择具有某些特质的邻居的补丁？

Question

我想让我的乌龟移动到某个补丁并制作一个＆＃34; splotch＆＃34;。中央补丁=我的乌龟位置，可以随机选择，但满足两个条件：

• 必须与龟的实际位置保持一定距离
• 必须通过具有特定质量的补丁包围（特定半径的邻居）

原因是创造了一种＆＃34;缓冲区＆＃34;在我的乌龟的位置附近，目的是阻止我的团队紧密靠近。

请问，我怎样才能满足这两个条件？

到目前为止，我有：

to go
 ask turtles [                 
   ; select one of patches in specific distance, and 
   ; surrounded by patches with no magenta color
   let aaa one-of patches with [distance myself > 3 and   
       all? neighbors with [pcolor != magenta]] 
                      ; how to write this condition above ?? 
                      ; and how replace "neighbors" by "in-radius"??
   move-to aaa
   ask neighbors [           ; create clump of magenta patches
     set pcolor magenta ]
   ask patch-here [          ; set central patch to magenta
     set pcolor magenta ]
 ]

Answer 1

你几乎就在那里;您只需重新阅读all?和any?的文档。

let _candidates patches with [distance myself > 3]
set _candidates _candidates with [
  not any? (patches in-radius 3 with [pcolor = magenta])
]
let aaa one-of _candidates

如果可能没有候选人，你应该防范。