请问：+ m1 V: C% Y# [4 x3 E* S# J
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？" p' N) U4 x, \$ i
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turtles-own [ energy ]
/ L( j: u) z. `+ pto setup* _6 ]9 i0 [( Y2 N
clear-all/ B# x4 B% e3 n
set-default-shape turtles "square"
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ask turtles[
" m+ U1 g! u! {+ | x set color white' s1 c- D6 q3 r
setxy random-pxcor random-pycor]1 W- `0 f' E5 @) R
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ask n-of microbes-initialization patches- a/ ], N6 }% p( ] s/ Q; G
[ set pcolor green]
0 i# P6 y, {% o" A; G- C/ T ask turtles [set energy 1]' `) Q9 h) s5 M$ Z8 A: }
end
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% s, R$ ], k# ~: pto go
. s4 h; c2 F7 \: F ask turtles [set heading 90 * random 4 fd 1]
: F6 x/ c; _1 }% C" U ask patches with [ any? turtles-here]+ E# K: P9 V2 V8 `
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]5 }. J7 }- p7 j X1 e6 Q
ask turtles [ if energy = 0 [die ]]
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to tt: ]0 S. F3 R8 A: O
ask patches [set pcolor gray ]
B8 n5 r3 H+ q; j7 B z" E7 K, B" eask turtles [set energy energy - 1]; ~, e! U. o9 ? M, [7 N
end* O: ^! H9 _9 h9 t. j
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发表于 2008-4-8 10:49:43
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