请问：
7 A k$ [& ^1 W* _9 w( ]; Z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？# L) _+ y6 w! B8 T2 O
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turtles-own [ energy ]
' r) z* E8 A& s8 G/ j8 B. Y- sto setup
) z) }, Z" R4 R$ Kclear-all" a% Q: l5 e4 ^4 ^$ f y
set-default-shape turtles "square"
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ask turtles[, T) v* C% c7 I) w+ f5 q& H8 |2 r
set color white9 D0 w9 Y, w! u" }: ~8 w/ o
setxy random-pxcor random-pycor]
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ask n-of microbes-initialization patches
! o0 d5 X, r! W7 G! t" U" W, F; R [ set pcolor green]
8 t" b! A/ h: A. F6 u T t8 `8 E ask turtles [set energy 1]
# S' G1 I X5 U" d7 `7 p; w0 pend
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. K$ b- b+ b$ q. Q ?) Nto go
1 _7 @; u `: ]: H+ I) u ask turtles [set heading 90 * random 4 fd 1]
# [* U' k0 O! ], T ask patches with [ any? turtles-here] x" O0 |" ^# a) U, y1 H
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]; e+ X' m1 e3 l) m& A& Y
ask turtles [ if energy = 0 [die ]]
. f P, v9 H U. N [$ ~ d end
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to tt3 M r9 j* G2 h: |
ask patches [set pcolor gray ]5 H: T9 T J! ?* K
ask turtles [set energy energy - 1]
* _+ q( J2 e4 o/ D9 n% gend
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发表于 2008-4-8 10:49:43
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