请问：- K- n& a/ ~9 C) f9 x
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？' V& {, v$ w3 v" s5 z
- A' g; j2 h5 B; B4 R. c/ N/ { 3 F- z9 s( J9 o
turtles-own [ energy ]- U; R3 u: p- ^6 k8 W8 W; U% _+ g
to setup; W: Q0 A+ W& J4 W. @' N% [
clear-all
5 q' t: G) |# V" ? @set-default-shape turtles "square"
, J, |1 s0 X2 C8 l4 pcrt nutrition
# P% l& z" J' K$ I6 Y% Oask turtles[8 O6 D0 {3 ]- i b
set color white, g) g* p' D5 _; R
setxy random-pxcor random-pycor]# k8 f7 b+ ~: E! L' U
" y" O1 v7 C6 k ?
ask n-of microbes-initialization patches
0 J' i: R+ j+ I1 U! G% { [ set pcolor green]- A2 `: O0 v) m/ {4 _& ]/ j4 F
ask turtles [set energy 1]
1 N- c' r% W v; r5 O2 fend/ A" s- o# B+ G3 \% R- m# r* @" |, A
% t. C8 e1 z# P5 K5 T, Uto go
/ x: n8 u$ G. {$ R! R+ c, Z8 V ask turtles [set heading 90 * random 4 fd 1]
* `7 C ~( e0 }/ i2 _% ~7 F ask patches with [ any? turtles-here]
: g8 m+ l) W/ r1 K$ I g# T6 o! K' A [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
. t8 @: W+ e3 I0 B ask turtles [ if energy = 0 [die ]]
2 e! D2 Y+ r m end
- H% z1 `8 c# c& M3 {8 R! \8 D9 g2 \+ Z4 L
to tt
& h s: M/ u$ `% M7 ~% fask patches [set pcolor gray ]
/ d. O5 X5 j2 F( r! P$ w ?1 x6 wask turtles [set energy energy - 1]
. z# g+ k/ W1 n3 v* x) |9 M' z2 q2 [end
) e7 Y# W, Z2 D6 Z
* ^& h" G; y6 b |
发表于 2008-4-8 10:49:43
楼主
