请问：
# ]7 i! L( [8 H6 H& p4 ?3 f: v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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3 ]+ w M( a! b2 ]4 [5 S, Z8 \
* t' m9 \! v1 v. Aturtles-own [ energy ]
' a3 h# H a5 o2 [7 H' J/ {& s9 n$ @to setup8 Q5 b1 R5 Z* [
clear-all
4 ]! n2 d: J* \5 I+ E- W" r" Tset-default-shape turtles "square"" v; t% Y1 c3 \9 q% H
crt nutrition
; N k5 a6 H8 G& b. d* {+ G; Hask turtles[
0 p# R, v" V# s, v( y set color white4 a9 Y/ h+ D6 o, t) G% I
setxy random-pxcor random-pycor]
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ask n-of microbes-initialization patches
+ @( D% ^5 {- q) L [ set pcolor green]
2 y3 X6 |; z) R* e5 q+ u ask turtles [set energy 1]9 g7 c& `; M. i B5 d3 Y$ ]
end) A/ ?1 t* z+ H4 V$ C& D
6 b$ C$ Y. {# X4 lto go
3 s2 C i9 W( a* M- w ask turtles [set heading 90 * random 4 fd 1]
7 Q' x+ T. C1 K& Z8 W8 Z) n ask patches with [ any? turtles-here]8 @. h& P$ A) y4 y& M) d
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]/ N# i6 n9 F0 ~3 u( J" E3 o) |% V
ask turtles [ if energy = 0 [die ]]
9 y6 i t% k6 b. _& u* S7 T; `! ? end- |% v% u9 T4 Y
# f V- o* P5 X5 }6 A% f, eto tt2 R! X( O, } i% G
ask patches [set pcolor gray ]
7 B, r* a* p! f# n# t; P0 }ask turtles [set energy energy - 1]
' P) S; }& \! g# a+ H Q: J5 Uend
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发表于 2008-4-8 10:49:43
楼主
