请问：1 l8 {! T J: d/ F% n+ ^
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？/ ?- f7 n9 q5 H
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1 k7 j6 i3 g& X, U" I! Aturtles-own [ energy ]- k7 _$ [+ G$ ^& Z( B4 Y7 v
to setup
5 B+ `( A0 I8 E% \0 L cclear-all
: U. v2 @9 w! @set-default-shape turtles "square"! M2 z7 K7 O# H. D4 Z" R. R8 N! G$ \
crt nutrition
7 M% C4 [9 Z5 t# qask turtles[
& V, Y1 R1 R. E" v6 C4 ? set color white8 D7 Y. s$ n' x3 e* o# W, q) m$ ?
setxy random-pxcor random-pycor]+ w* G. l, N- ~. Y" q& V6 \
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ask n-of microbes-initialization patches5 ^* f8 B2 s) `9 L/ f3 W: W' b* L
[ set pcolor green]2 N+ \: t2 \1 E- d& B
ask turtles [set energy 1]9 x$ _; F4 G0 d0 O
end
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; A: B x; U5 Z0 \* J, k2 I. w6 O* Bto go
+ }% `- S9 s8 `; X% ?6 g- U# a ask turtles [set heading 90 * random 4 fd 1]
* v# k9 f8 f# T* I) R ask patches with [ any? turtles-here]9 M* \4 V7 A+ I
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]
. @) w3 ?+ }& i$ r2 a ask turtles [ if energy = 0 [die ]]
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to tt7 O0 F4 X' m( t, E; ^6 n1 X& u9 y
ask patches [set pcolor gray ]) p/ k7 R5 Z9 R. j- M
ask turtles [set energy energy - 1]
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发表于 2008-4-8 10:49:43
楼主
