如何在网络徽标中使用BOIDS规则使代理在他们的组中蜂拥而至?

Question

这是我想要做的：

1. 我需要所有代理使用 BOIDS 规则在组中向前移动

2. 我希望他们在遇到墙壁后能够转身(我的世界不是包裹的，他们无法穿透墙壁到达世界的另一端(

这是我的代码：

globals [nearest-teammates teammmembers]
turtles-own [ myteamset teamID myID teammatesID ]
to setup-groups
let teamCounter 1 
ask turtles [
if myteamset = nobody [
let possible-teammates other turtles with [ myteamset = nobody ]
ifelse count possible-teammates > 1 [
set myteamset ( turtle-set self n-of 2 possible-teammates )
let ids sort [myID] of myteamset
set teammmembers myteamset
set nearest-teammates min-one-of myteamset[distance myself]
let tempteam teamCounter         
set teamCounter teamCounter + 1
ask myteamset [
set teammatesID ids
set myteamset teammmembers
set teamID tempteam
]
] [
show "Not enough turtles to make a new team!"
]
]
]
end

植绒部分：

to move-in-groups
let teamNumbers remove-duplicates [teamID] of turtles
foreach teamNumbers [                         
ask one-of turtles with [ teamID = ? ] [
if myteamset != nobody [
ask myteamset [
set  heading mean-heading [ heading ] of myteamset
ifelse distance one-of turtles with [ teamID = ? ] < 3
[separate]
[align
cohere]]
fd 1 ]]]
end

帮助程序代码

to-report mean-heading [ headings ]
let mean-x mean map sin headings
let mean-y mean map cos headings
report atan mean-x mean-y
end
to align  
turn-towards average-flockmate-heading max-align-turn
end
to cohere  
turn-towards average-heading-towards-flockmates max-cohere-turn
end

to separate  
turn-away ([heading] of nearest-teammates) max-separate-turn
end
to turn-away [new-heading max-turn]  
turn-at-most (subtract-headings heading new-heading) max-turn
end
to-report average-heading-towards-flockmates  
let x-component mean [sin (towards myself + 180)] of nearest-teammates
let y-component mean [cos (towards myself + 180)] of nearest-teammates
ifelse x-component = 0 and y-component = 0
[ report heading ]
[ report atan x-component y-component ]
end
to-report average-flockmate-heading  
let x-component sum [dx] of nearest-teammates
let y-component sum [dy] of nearest-teammates
ifelse x-component = 0 and y-component = 0
[ report heading ]
[ report atan x-component y-component ]
end
to turn-at-most [turn max-turn]  
ifelse abs turn > max-turn
[ ifelse turn > 0
[ rt max-turn ]
[ lt max-turn ] ]
[ rt turn ]
end
to turn-towards [new-heading max-turn]  
turn-at-most (subtract-headings new-heading heading) max-turn
end

我得到的错误：

SUM expected input to be a list but got the number -0.961261695938319 instead.
error while turtle 4 running SUM
called by procedure AVERAGE-FLOCKMATE-HEADING
called by procedure ALIGN
called by (command task from: procedure MOVE-IN-GROUPS)
called by procedure MOVE-IN-GROUPS
called by procedure GO
called by Button 'go'

我该怎么办？我需要帮助... ·' ̄(>▂<)´¯·. 谢谢你的时间。

Answer 1

您收到的错误发生在以下行：

let x-component sum [dx] of nearest-teammates

NetLogo告诉您，您尝试将单个数字传递给sum而不是向其传递列表。怎么会这样？如果nearest-teammates包含单个代理而不是代理集，则会发生这种情况。

因此，让我们看看您在哪里定义nearest-teammates：

set nearest-teammates min-one-of myteamset[distance myself]

你能看出问题吗？您正在使用min-one-of，这确实为您提供了一个代理！

例如，您如何获得 10 个最接近的代理，而不仅仅是最接近的代理？幸运的是，NetLogo有一个原语可以做到这一点：min-n-of。以下是您将如何使用它：

set nearest-teammates min-n-of 10 myteamset [ distance myself ]

当然，将10替换为您想要的队友数量。