请问：' F0 r/ k6 k+ D* p/ j. N
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？& k+ P+ Z9 z+ A2 U- D% F2 |
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turtles-own [ energy ]
O P& p- d4 M) nto setup* V. W. T1 ]% C' v# C( X. |) C
clear-all
! h! L" E" j+ G2 jset-default-shape turtles "square"0 }4 T0 ~( e% N
crt nutrition
( q) ]; k5 L. ?ask turtles[. S; n0 h I% ?4 H
set color white A; z+ G$ _- e4 t
setxy random-pxcor random-pycor]( H, v/ q( l u! N
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ask n-of microbes-initialization patches
6 \/ [* m1 [8 W9 ^! G& @: W [ set pcolor green]5 a2 ?( X( N' O7 s
ask turtles [set energy 1]7 ^5 Z9 M1 M8 m4 {' r
end* v b* T6 Q6 T. m3 L' N
; O, m6 v# l d7 O/ {& Dto go% y; t1 v* S/ G. `) D
ask turtles [set heading 90 * random 4 fd 1]5 G: N; ~' x8 v' X2 x7 [
ask patches with [ any? turtles-here]0 K9 L4 @! W c3 t4 p f
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]
6 |6 D; ]% Q# [" \ ask turtles [ if energy = 0 [die ]]
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+ z. p+ t. g9 n3 w& G/ zto tt
, O. J1 P' D: e$ uask patches [set pcolor gray ]
5 Q& k3 P% z5 k* U7 u) kask turtles [set energy energy - 1]
7 t- c, N# v, v. d/ }end1 y4 e8 T7 {/ f3 K4 Z
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发表于 2008-4-8 10:49:43
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