请问：1 |* N5 y" E6 B+ x& M
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？' {) P7 u: C0 s% K
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: B0 R- b' \# T4 B. Vturtles-own [ energy ]
5 b2 r" M# F7 T! D- r# ]" d X [+ Tto setup6 G0 Z) S: i) q, I
clear-all
5 ^2 I. ]' d! ~' {9 Nset-default-shape turtles "square"
1 ]! E9 Y5 d9 N ccrt nutrition) {# _1 V% `, D6 v ~, c
ask turtles[0 Q1 K$ Y6 _( u$ \3 ]
set color white
) }' u% Z' g/ E' J setxy random-pxcor random-pycor]% w( k9 L9 B9 ?/ u% G& l3 i
3 H" a3 w1 b. Q0 Q: b. @3 F& Bask n-of microbes-initialization patches& U3 K( R% ?: x1 a
[ set pcolor green]' ], R4 }# J" h7 k1 I9 R
ask turtles [set energy 1]
# v. v, p7 z r+ hend
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! K: ]- a' {7 ~1 yto go
" `+ j- ^# e& g$ I h: H ask turtles [set heading 90 * random 4 fd 1]
: Y; y) l5 I* X( N8 n ask patches with [ any? turtles-here]+ o. X) I* S: \( \: U1 D' q% C
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]
! N1 H/ P9 v; E7 k+ B ask turtles [ if energy = 0 [die ]]- W( Y. A5 c) J- w/ ^; P
end* \/ B+ [2 f6 e& c
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to tt; V* r3 @9 E% T: d" K, Q
ask patches [set pcolor gray ]
8 G2 Z/ t3 a6 z6 }( R3 I$ }$ yask turtles [set energy energy - 1]$ @; q' x3 a( `# a( b1 l
end! D5 P! p; a' ^3 J
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发表于 2008-4-8 10:49:43
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