请问：* V& r4 x* G* i$ K! R
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？4 G; J: ~: o! t1 D; h. \8 n
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turtles-own [ energy ]1 @6 p$ l$ l. X& E
to setup
, h- z; \/ G7 j, V- X) @clear-all
% C' l) N- i& u* ~set-default-shape turtles "square"
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ask turtles[ F# i. ^% @6 L# @
set color white4 H6 H- e# p# o7 x Z: B0 G" D. W
setxy random-pxcor random-pycor]! e* [7 D2 c' |) W1 J k- s
. E& q6 o, c2 D0 g+ ^0 _- c! Oask n-of microbes-initialization patches8 [! m( P1 s6 ]8 e4 [
[ set pcolor green]
( G" t& _; O: Y! S ask turtles [set energy 1]+ _0 e/ J" e) c9 d3 A$ T/ @
end. w$ L, f+ b/ Z& f; k5 z6 g
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to go
- n# l$ H- M. _2 N2 M8 b ask turtles [set heading 90 * random 4 fd 1]
% X) h& i- R7 X3 M ask patches with [ any? turtles-here]
% T" v1 t) Q: M. V' Q [ if pcolor = green and random 100 < chance-of-congregating [tt ]]7 p$ @) v8 d& f; v+ }
ask turtles [ if energy = 0 [die ]]0 D; _8 I+ O) d% I* [0 C
end8 P. U& F0 ^7 Y4 Y
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to tt
" b8 l0 \& _& a$ V0 ~; qask patches [set pcolor gray ]
. W) a3 A9 z# J$ e& s& E$ Mask turtles [set energy energy - 1]
& M- t! N5 A; g; I) Dend
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发表于 2008-4-8 10:49:43
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