请问：% k. g( r+ P, I& E9 T% N* o
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？# j3 ?6 w7 ~7 ^* E+ D* [3 w5 j4 f' _
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& u: R( n9 O8 U( E5 M. }turtles-own [ energy ]
, e5 G4 V0 T7 f: |6 E& f Pto setup
% L, u4 a+ i# s7 @2 w! T: @clear-all! c* A" C* y0 l( A( y* H- w
set-default-shape turtles "square"7 p5 L+ D2 l j$ M" f( w
crt nutrition
L$ L# U" U" {- k: b: W0 nask turtles[9 U4 o2 [" h& n3 B) s4 b
set color white# a3 N1 d5 f# H" ]# F3 L
setxy random-pxcor random-pycor]- l* e+ r7 f0 Q
5 f# C/ a: s/ N; j6 yask n-of microbes-initialization patches
; q4 `& h: L; M, V( R1 g [ set pcolor green]
; r1 m" w9 ~9 s$ r" l4 }9 G ask turtles [set energy 1]
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to go5 _& u4 F6 w3 S, Y; ^& A
ask turtles [set heading 90 * random 4 fd 1]4 ^* J: o1 r) w1 q4 ~/ z
ask patches with [ any? turtles-here]" I; c. ~% F1 V
[ if pcolor = green and random 100 < chance-of-congregating [tt ]], p. c }4 G8 ]; V! @4 P ]2 `
ask turtles [ if energy = 0 [die ]]
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5 W5 u& a2 g# [ ^5 Z0 ]3 o5 q ~/ c4 a! sto tt
, c: I( H, x) ?: Sask patches [set pcolor gray ]
4 I6 q7 U3 g9 m0 g( c* eask turtles [set energy energy - 1]( v9 ~( J1 k6 i" L, f/ K! O
end) W% E1 c1 A* _. a# ^4 A+ e2 `( Q, Z
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发表于 2008-4-8 10:49:43
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