请问：
4 {$ @* z4 H# v3 H+ O8 \+ ~# _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？% a0 ~) {+ z1 o; ]. z4 A
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turtles-own [ energy ]( `7 f# e. t2 x3 x
to setup
* I! v% J& k, O$ D f! f% Fclear-all
q$ R9 Y6 y0 |4 oset-default-shape turtles "square"' ^. W# o! k& _) C! a( @
crt nutrition
9 G' B; _2 B: L2 Iask turtles[, q2 T8 B1 Y8 \) v7 ~
set color white
/ D# {/ L* W1 Y! w# @ setxy random-pxcor random-pycor]
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ask n-of microbes-initialization patches
; j0 v8 K% x3 U# J8 E: p2 Z [ set pcolor green]
- R2 C7 z' |* W" Z" P ask turtles [set energy 1]
4 j+ c; W$ I3 ~' Oend
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5 U9 M' _: V7 y O: e4 Z% I. ~to go
2 Y9 v; G( F' n/ o4 y& @( x ask turtles [set heading 90 * random 4 fd 1]" c w: [- s+ \
ask patches with [ any? turtles-here] K5 L" s- ^- e3 K7 ~9 L. u
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]
. C1 `/ |, K& C' F* B. {3 {5 d ask turtles [ if energy = 0 [die ]]
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' ]: }5 A! {5 k& Q% D, h0 p R5 lto tt
5 R& y4 Y6 \: [. ]3 bask patches [set pcolor gray ]
# I! S2 I `" wask turtles [set energy energy - 1]
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发表于 2008-4-8 10:49:43
楼主
