请问：4 b0 o/ ^; k1 I" K# Y: Q
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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! O& l+ h& ~" {* _$ [) @! j5 Y, G fturtles-own [ energy ]: k; o. a" @$ D, I3 e) r2 i
to setup
1 q0 ^! D# Q( Z! ]/ O1 g8 sclear-all& i! X# y, z0 V5 Q8 Q2 x8 O
set-default-shape turtles "square"
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ask turtles[
( R( H/ u6 W7 L& K9 W3 y. Q! @' G set color white/ S# P" }, l1 ^6 y
setxy random-pxcor random-pycor]- ?" z4 l: q1 I6 l5 V' E Q# p
1 \9 U* k- M7 l( h' J* Fask n-of microbes-initialization patches
! H a+ k6 W' K [ set pcolor green]
* m# I2 C5 N( y ask turtles [set energy 1]
* T# l1 F0 \, i6 w/ f7 }9 L M1 }end% c* V* y" B1 X) b# U
3 W; V( V4 h0 C4 X5 u3 C% pto go
7 {# j, b3 u6 w+ c# ]7 p3 p ask turtles [set heading 90 * random 4 fd 1]( G# J+ f7 Y0 B: p$ j0 k
ask patches with [ any? turtles-here]% w3 |3 {/ p c0 E
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]
5 K. _" h, X. d% Y; k ask turtles [ if energy = 0 [die ]]$ X' [$ n0 g( n: Q
end
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to tt, n# @% L. S2 V% M2 G
ask patches [set pcolor gray ]) D! n( j4 u& L0 s$ d# i
ask turtles [set energy energy - 1]: S) O2 B- W2 V1 Y K
end0 J1 q! v* t7 y
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发表于 2008-4-8 10:49:43
楼主
