请问：# `- O& [& S' B. {
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？. L/ @' f8 Q* ~- H! i
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2 d( `6 M4 {. u/ q* i3 zturtles-own [ energy ]' S/ R: |* P. M; u3 w7 G% O. f
to setup( X; K0 J+ q4 c& e1 y' J/ a
clear-all
Z% Z# o$ F5 z, m- fset-default-shape turtles "square": h* H% |' n8 v7 ]
crt nutrition7 j4 L7 O0 |) B0 b2 f8 W4 U* W
ask turtles[4 g* {2 Z8 v* k+ e) F
set color white. F7 N; W8 `$ V9 V6 D# v
setxy random-pxcor random-pycor]9 G' V$ j/ x) F. V
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ask n-of microbes-initialization patches
7 B3 v z' e1 o/ E/ J2 ^; g [ set pcolor green]
" O( S6 d& x% ]* P6 q9 P! Q ask turtles [set energy 1]0 v; t7 I' {' l& L1 q/ b( k8 O
end
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to go
) m$ @ j$ t2 g& y& S! H( ~: O8 t ask turtles [set heading 90 * random 4 fd 1]
6 C+ H( G( g4 y* G ask patches with [ any? turtles-here]
4 H( q# i5 p1 z# l3 g [ if pcolor = green and random 100 < chance-of-congregating [tt ]]; r+ y/ d; A9 f
ask turtles [ if energy = 0 [die ]]
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to tt% Y! V- A) l3 y, L
ask patches [set pcolor gray ]6 h" l3 W% o* M6 @9 d) }
ask turtles [set energy energy - 1]( n4 U+ I% X U# U2 S Q% L6 m% S9 d
end' u8 m0 O0 k( z$ h" n2 X3 I
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发表于 2008-4-8 10:49:43
楼主
