请问：( C$ v) n- c9 }) M
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？6 `% k6 E' I2 i# a$ w- N9 p' k8 l; j. n
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turtles-own [ energy ]" s0 Z0 ?6 H# y# @
to setup) N+ @5 Q3 {& f& t% i# W
clear-all; u% J t5 m; m3 F4 }, ?
set-default-shape turtles "square"5 t* m8 s, v# j' R/ m
crt nutrition) E* r, y( Y( |! |+ g, C
ask turtles[
/ h+ c' b' K" E% V set color white* {& p; ^! ~8 W; ?
setxy random-pxcor random-pycor]
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ask n-of microbes-initialization patches* g+ y+ G" X9 Y% M( @% O X) I
[ set pcolor green]
0 h. U2 y' g8 s7 H ask turtles [set energy 1]# Y t1 x. G: {7 ?+ @9 x% G4 O3 N
end) P9 D b& W0 Y9 v- K) C
9 W ~( X. {1 F7 ^to go
+ p; D0 T* O6 a2 ~! X+ I) k% |: l ask turtles [set heading 90 * random 4 fd 1]
" z6 ` T$ Z6 a4 G& A ask patches with [ any? turtles-here]
/ c. M6 v' s! h9 ^8 ~ [ if pcolor = green and random 100 < chance-of-congregating [tt ]]+ Y9 V; }- n2 D4 R0 C# \
ask turtles [ if energy = 0 [die ]]
: }% g i. B; O2 J+ Q: r; o' q end
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to tt+ p$ X& _! F7 S
ask patches [set pcolor gray ]
$ T0 Y; E+ M% L% o3 Vask turtles [set energy energy - 1]
. U) q. F7 _& e- L6 f* b7 kend
( [4 \ c" e7 C7 f( |" H7 W
+ X+ c% B6 o; ]7 e6 p0 W# ] |
发表于 2008-4-8 10:49:43
楼主
