请问：* o! |6 T& @& R+ `7 z$ ^, O
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？5 W, C6 S- s7 c1 h$ |
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turtles-own [ energy ]
$ z4 _ v' O" D, zto setup. \, s: Q0 v, O8 X" a
clear-all7 I, B5 |. e% _% j* r/ k& u
set-default-shape turtles "square"8 r! \- F1 v8 C2 X! R$ l& Y
crt nutrition
* O5 s9 g4 ~9 K f* s1 Nask turtles[4 ~8 g( F8 t$ r* H1 `& c8 \2 h
set color white
/ k5 e# X2 Y7 H- G+ F1 q9 H setxy random-pxcor random-pycor]
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) @! S' U& T" t3 c/ g; C5 qask n-of microbes-initialization patches" q& {' ^' G: c( r2 Z' G) P
[ set pcolor green]1 L( b! g9 h& J3 n
ask turtles [set energy 1]
6 D+ t6 T9 @% U- [6 R) F gend
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7 K: H" j+ o! ]1 W0 J6 [to go
. T: z5 M z$ P& I% w( R ask turtles [set heading 90 * random 4 fd 1]" x$ F- F' y( I/ [3 I0 t
ask patches with [ any? turtles-here]" h* ?6 @' t Y
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]4 Q( b4 d+ g( b8 u' A0 }* }
ask turtles [ if energy = 0 [die ]]) _& h4 l& d; Q5 G
end2 D5 ?* d$ o9 u3 i
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ask patches [set pcolor gray ]
6 U; G6 K7 F; z( l8 P6 A( ]3 @ask turtles [set energy energy - 1]
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发表于 2008-4-8 10:49:43
楼主
