请问：
: Q$ b% d, i, n8 V7 q) h5 G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？
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turtles-own [ energy ]# L0 T j9 X( a3 s1 i* m
to setup9 D' {# Q' w2 c2 q& k
clear-all, Y! M9 K7 [3 e( ^; `+ j
set-default-shape turtles "square"9 O+ S8 x7 T8 H1 ]5 V! v0 q
crt nutrition2 Y- @. b& g- ?4 W8 e
ask turtles[
2 I, r( L9 c6 g set color white# V8 ]7 a# E: K5 K* G
setxy random-pxcor random-pycor]. Z& X: m. y6 Z0 t8 @
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ask n-of microbes-initialization patches
: f2 X5 [: A- l9 V& p" `9 K [ set pcolor green]
% `6 f' q2 z, h) {- t ask turtles [set energy 1]
& T3 r6 R2 g% C" I$ C+ r( y Vend
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to go
! [+ A$ U6 a4 h ask turtles [set heading 90 * random 4 fd 1]& J$ i4 Z9 e$ m3 h
ask patches with [ any? turtles-here]6 a9 |/ y) ?9 [; i
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]
& I- f' `" }- H+ z* i1 \* X' n5 M ask turtles [ if energy = 0 [die ]]$ [0 ]( ^, t: S: b0 U
end8 l! _5 |4 [; E, n; n% \
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to tt4 [$ K& i4 t/ |( V
ask patches [set pcolor gray ]
# V' M% Y* h* Wask turtles [set energy energy - 1]
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发表于 2008-4-8 10:49:43
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