请问：* D7 G6 e! F6 J+ _* i% 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？# T0 u. S2 y5 T9 Y
! H" Q; G- h. x* V
5 h8 m9 E( q. q: j3 `: wturtles-own [ energy ]
4 Z7 T. n- e0 M: _7 Q% Yto setup) i! w0 R R0 x
clear-all
* d, n- d1 A; R, ~8 ^: jset-default-shape turtles "square"
2 g" A7 k9 |* z0 {) q9 G0 _crt nutrition
$ B) }* {- P' n: z' Xask turtles[1 f% c2 v* S! f3 N5 _
set color white, H) k5 |0 X7 W" S9 k
setxy random-pxcor random-pycor]
; [1 r' V! I8 t& S
* o- T) ~, t5 t, |1 v4 J4 O) z Cask n-of microbes-initialization patches
% w. Z) b! d1 R9 M0 {" q( c4 S [ set pcolor green]
6 Z% t$ ?( {% Y J ask turtles [set energy 1]- l- T8 k1 [4 h* Z+ @( N
end
X* K3 \& Y/ Z6 c
8 w8 e$ N: w3 M% q. u% c6 `( mto go. u3 z) ?5 I2 d# X
ask turtles [set heading 90 * random 4 fd 1]
0 D5 e/ x' X' X% o! `1 e, k ask patches with [ any? turtles-here]
0 J. w% S8 b# ]. ]' Q7 J! ^ [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
8 I. T. r- h+ H v8 W/ h ask turtles [ if energy = 0 [die ]]
3 [( D' ?1 B0 n- s2 s+ {: I2 i6 T end
, T$ H! {( s0 ]; A+ l- I% w
* J6 l+ \! S( @1 y3 s$ rto tt9 y* M$ e. T4 D( g
ask patches [set pcolor gray ]
" e' M0 V! N& \/ q7 Y. Jask turtles [set energy energy - 1]
1 [' x. t! `7 [3 N2 b6 P2 Cend% V0 c6 x& [% Q+ _5 Q
0 m; J! d7 I' b/ B* i& r |
发表于 2008-4-8 10:49:43
楼主
