请问：
0 W% m/ |# ?( ^7 }9 V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？7 w4 k g# x. ]8 G6 L7 G1 l
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turtles-own [ energy ]" R9 O; i5 \6 u4 g5 n' R; m: \
to setup
; I9 L& p! z% m7 q, v# E# iclear-all
$ Q8 G9 _: G: rset-default-shape turtles "square"
- I8 @+ l" p. V" l$ f! J! ]- G0 Ycrt nutrition
8 R6 j; C' r7 x0 Lask turtles[
/ A& v- h: z7 M& b) t+ n. ~% m1 e set color white
4 g# ?! T( Y: ]! J' X% f setxy random-pxcor random-pycor]
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ask n-of microbes-initialization patches/ E) y# `* M; i/ _! r+ r
[ set pcolor green]
+ N& f, }. E* d: X/ E/ G. P ask turtles [set energy 1]8 P1 R; s( b* n: m' B
end) Q! i# Q& W/ X
+ k6 q2 _ z1 `1 M2 ~. R' B$ {2 Kto go. [3 y8 a- c# H O
ask turtles [set heading 90 * random 4 fd 1]8 G: c0 B6 S6 g; D; S( M+ j( I, ^' h
ask patches with [ any? turtles-here]
: V7 t% O2 e, o; K3 L8 E3 ] [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
( B! j# X. n, ~& a! J8 b5 _ ask turtles [ if energy = 0 [die ]]( T B+ [3 M% _ A0 t8 Z
end
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to tt
$ E# t$ J/ g9 C& U- Iask patches [set pcolor gray ]
- Z- P" @3 M4 k) [' N+ o1 p4 ?ask turtles [set energy energy - 1]3 ]$ {; Z% D. V" a$ V$ R
end
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发表于 2008-4-8 10:49:43
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