请问：
, a, ^$ t# y0 W" q! Q4 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？
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turtles-own [ energy ]' K4 h. X# ], J7 \. i+ i8 I
to setup
" W- ?9 r h: U7 [+ pclear-all2 G* G$ M# E5 [* d6 ?
set-default-shape turtles "square"; w F+ ^/ d) _. k9 h
crt nutrition
2 g" A. j8 A! p" I1 ?: wask turtles[. S6 g9 @+ |; H6 }
set color white
2 C" y4 m- M: B% c1 W9 z0 N) e1 Z setxy random-pxcor random-pycor]
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2 l1 L7 r1 L' W3 A, r2 Nask n-of microbes-initialization patches( ?5 ~: _# `( b2 c6 m
[ set pcolor green] E' q% {1 ^& o5 P. S0 m9 K, B
ask turtles [set energy 1]
0 a4 q- a, V' o3 }7 D# fend! F* T0 Y. E& }9 D5 U, O9 S% ]
a# ] l! z9 Wto go
$ R# g1 T8 O) x7 K! f6 q' @ J ask turtles [set heading 90 * random 4 fd 1]7 u* [' }7 b- G: ~/ C
ask patches with [ any? turtles-here]
* c! W$ m2 |1 ~7 W, O. Z [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
! U) S; }, l# z. `* P ask turtles [ if energy = 0 [die ]]# A9 ~4 W: O% Z" u" K, H8 p; @
end
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to tt
+ A) j9 p- D6 R: O. a m+ m3 xask patches [set pcolor gray ]
( V- v! W2 z) l0 ?9 Oask turtles [set energy energy - 1]
0 C% |# L- S: M, P6 A Fend: x4 i, P' L, z! Q& B( e
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发表于 2008-4-8 10:49:43
楼主
