请问：
0 e* w3 f a* j% |2 k6 c: Q, D( u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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& M. C( l" F& [9 D" H; ]$ L. yturtles-own [ energy ] n* `4 o i9 N) x
to setup, a; ~& X" x/ O2 n( c* n5 L. o& u9 f! f
clear-all
) q" {0 T% j4 R P3 ?! lset-default-shape turtles "square"
$ m- x t0 k3 |! C% F4 Fcrt nutrition
( r; D) I8 G6 ]! E# Y" `ask turtles[% J" v2 @6 b# M7 G9 F
set color white* ]- n0 l: E9 ^- h, a Z
setxy random-pxcor random-pycor]& O/ p) r( @+ B& N* x% z; L
0 r q3 E0 Q' e; Y. gask n-of microbes-initialization patches# T' ~& u' S/ w5 F0 w! v- F
[ set pcolor green]1 `! v! |5 ?& r/ X; q/ N4 {. x
ask turtles [set energy 1]( T& W- C8 {$ f! V: e
end
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c7 w, m J: Kto go
! {, u, g3 x* k+ q ask turtles [set heading 90 * random 4 fd 1]
% Q4 V$ q, z0 @+ q3 G# W- b ask patches with [ any? turtles-here]
5 h6 A' [ h# i6 P; h- D- F4 P" S [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
8 n; [+ b' O# ~' |9 q6 R1 `: n0 y ask turtles [ if energy = 0 [die ]]
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to tt
3 v, f! J! q& I0 a# Z* eask patches [set pcolor gray ]
2 G1 V0 K! W' {3 l2 Vask turtles [set energy energy - 1]
! x# [% i: O0 }9 L& R6 F7 c7 _) Gend
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发表于 2008-4-8 10:49:43
楼主
