请问：4 Q$ g' \* S4 U3 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？8 A5 Q( r' [1 G3 S
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5 [. e/ B! [& f# X1 \turtles-own [ energy ]
4 Z! v$ ] o& E O" t1 z) y7 ^to setup% _% \( c2 x* _/ \3 b$ i v
clear-all: N, n0 Z5 X9 K/ w7 P4 f
set-default-shape turtles "square"
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ask turtles[
/ y2 S C4 D" i; e set color white
, F$ v$ q; q4 }$ p& E \0 }6 ~ setxy random-pxcor random-pycor]+ A) r5 ^ I! g
% d4 l0 S$ b. ?ask n-of microbes-initialization patches) {" n+ q6 f: k, v# t' K4 D
[ set pcolor green]
3 P7 R- L" j% ` ask turtles [set energy 1]
1 b0 Y- ~% k$ V& |2 O) ]* ]end
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0 p+ T' P0 [. oto go
- f# s4 K" Y0 i+ v: G/ x# u) `2 w' M6 T9 z ask turtles [set heading 90 * random 4 fd 1]" m# w3 s9 ?& Q+ ]- j r V
ask patches with [ any? turtles-here]. r" ^1 f$ [7 m
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]
- O/ W: o: m& s Z" P9 I3 t* Q# S: q ask turtles [ if energy = 0 [die ]]# s$ u/ g. V( O1 A x
end- N, d3 @: ]: `
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ask patches [set pcolor gray ]( P' o5 a" d/ Y2 U
ask turtles [set energy energy - 1]# O k$ E& X" j2 f! K# u. b
end
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发表于 2008-4-8 10:49:43
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