请问：( C) c/ d$ T. O/ C! W d8 i2 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？
1 v4 k) k" n0 b, K; L! h3 v
! Z4 i/ U5 Z8 o4 e: C
9 ?, H" |5 `: J8 n& ]! n; c7 hturtles-own [ energy ]
1 v r! J5 F ato setup8 R$ d' x3 j4 ^% ~. {6 N" r) W( V
clear-all. g* X& q% i, ~3 R. }
set-default-shape turtles "square"9 C1 n3 o6 W! x' _$ Q
crt nutrition
W/ g* X" o) sask turtles[
6 n, p) V6 a3 H. S set color white2 i3 i- d/ a6 [1 Y! _9 n- M& R1 C( ?
setxy random-pxcor random-pycor]
% @1 ~ T* e! c- {( F
5 R9 i$ u& [! f- K6 [' |ask n-of microbes-initialization patches& u5 b& T0 M! T* N$ t
[ set pcolor green]
# l7 c5 l6 \, x5 M/ r, d! y ask turtles [set energy 1]( ~ a( H' {. U Y# f
end
f4 N8 k( m2 f" ?
% q2 b4 ?) {$ T# bto go
, N4 r) Q% u3 K# c1 v0 U/ u2 C ask turtles [set heading 90 * random 4 fd 1]* r* I9 X- d- h: d
ask patches with [ any? turtles-here]
+ z6 x$ `! K7 ^1 m0 Q1 c [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
U8 U4 v; g5 Y. n ask turtles [ if energy = 0 [die ]]) [& t; g4 b* b. H: \) v
end
% c) \. t4 w" r) t) }! x1 w# W6 M9 o
0 c$ H. w6 F! {. O- o" r' N2 \to tt T5 O& n5 B- W4 U1 ^
ask patches [set pcolor gray ]+ X6 S4 A# V' t8 @" Y0 x4 O+ Q* F
ask turtles [set energy energy - 1]
/ P% L* G* y, k+ _, s" yend
# x$ L9 W. r0 }5 ?/ Z- s4 A: Q5 S$ O
|
发表于 2008-4-8 10:49:43
楼主
