请问：
$ a9 @' Y% V' S2 x随机产生的turtle 已经在patch的坐标上上下左右一格格运动，当turtle碰到一个随即分布的patch以一定概率粘合,patch变色，其他turtle经过也还是以一定概率粘合的，粘合后turtle的能量就会转变到patch上，并且以一定速率消耗它，怎么编写这个过程？下面是我编写的，运行时就出错了。怎么改正呢？& K' B% N9 T& _3 C9 y( G3 D+ G4 Q% d
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turtles-own [ energy ]- S; F% y: |" T5 ~2 e1 q
to setup' \9 Z0 `# U+ b; x# h- A, _7 \
clear-all
& g2 ?' j$ e4 d6 {4 ^, Xset-default-shape turtles "square". f7 b2 V0 q b# O* M
crt nutrition' U" z; v- u. q
ask turtles[$ v7 J( {6 m+ y! Z) K7 b5 s7 `$ h8 h
set color white
' ~- n: C0 S2 W7 z6 A# }& A setxy random-pxcor random-pycor]
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ask n-of microbes-initialization patches+ O6 b- M; B0 b. F4 \
[ set pcolor green]
- P1 C- x" c, J/ }1 ~ ask turtles [set energy 1]& J! ?; V/ C) _- k9 \7 C, J
end4 R/ p: P( s3 `
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to go
. U( x- i! M! n) ?4 W" W ask turtles [set heading 90 * random 4 fd 1]
2 A- y1 p N# L" ^2 q ask patches with [ any? turtles-here]
6 _4 K+ I/ g/ j& P: }& @# V9 W! K [ if pcolor = green and random 100 < chance-of-congregating [tt ]], y( }2 ~ x# f
ask turtles [ if energy = 0 [die ]]) k% i0 ?" k( _
end
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to tt
7 P" {2 ]% _5 q! Jask patches [set pcolor gray ]! o4 Q# c# M P
ask turtles [set energy energy - 1]4 i/ T) F: q' t! w2 }
end
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发表于 2008-4-8 10:49:43
楼主
