请问：( H0 h5 U7 K5 @4 T+ E
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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' m9 C) M( _4 v- N3 pturtles-own [ energy ]
* g2 m; V" N0 rto setup
3 G* T9 L; X5 c0 V! r3 \clear-all9 d( W+ S( C- m- r; x4 @2 ?
set-default-shape turtles "square"5 m, t4 D1 ?, N+ Z6 x5 ~
crt nutrition+ m; h9 B* A1 x4 _+ O( H; \8 F
ask turtles[
$ H; @3 j; [! M0 B set color white* [) r* V& G. G& U! ` d1 E
setxy random-pxcor random-pycor]1 ]& G) W' u4 G! U3 x
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ask n-of microbes-initialization patches
* P1 @0 F! X/ M4 N# U4 p [ set pcolor green]
6 A. q( b$ G" D R: X* k. Q, a: k ask turtles [set energy 1]+ l, V! M- E: K* M
end- n5 H8 c$ M- }: a; i
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to go
% `3 }$ z$ F5 S' V& ~6 \9 @0 P ask turtles [set heading 90 * random 4 fd 1]
- u4 O2 B+ W, i% T$ W+ g ask patches with [ any? turtles-here]
! Z# u6 ^) T U# y3 t, P& T7 V [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
( m, j$ F" D9 c& ` ask turtles [ if energy = 0 [die ]]
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ask patches [set pcolor gray ]$ ?" i G T: ]- q; v9 t
ask turtles [set energy energy - 1]
- H/ M# c3 ~4 Yend
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发表于 2008-4-8 10:49:43
楼主
