请问：! o$ u& r/ ]$ S+ e% `) H# [; R
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？' ^6 u) {* O2 j) t8 h
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0 C+ _7 G) q: f" m' Zturtles-own [ energy ]
4 W$ s: m. F9 `. {" h0 ]to setup
2 O2 u5 a$ ~2 l- `clear-all
# c$ d& m# \$ k0 oset-default-shape turtles "square"
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ask turtles[ d. r5 u$ w. G6 f, M: Y; r5 |
set color white2 m& r" @; L L! n3 ]1 p# ` z
setxy random-pxcor random-pycor]5 m' f! {0 C4 @: ?+ C2 G% D+ y- M: Z$ G
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ask n-of microbes-initialization patches
8 a3 P$ S) h7 C4 z) G* E8 r0 u, A [ set pcolor green]6 @) f0 [' _8 \' G( a, |
ask turtles [set energy 1]& m8 }% B# Q- Y6 m0 t; P
end
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ask turtles [set heading 90 * random 4 fd 1]
+ Q% d, v5 Q) i; @ ask patches with [ any? turtles-here]% k: `: j2 P) |7 k8 }+ F
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]! }1 G/ z' ?( J* i' `" z+ N& l* m
ask turtles [ if energy = 0 [die ]]. ]2 Z' _$ H2 A
end
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, [4 \% N7 r/ g$ s* v- H( J; cask patches [set pcolor gray ] Y" L- S4 _- Y* r7 r9 G. ~& ~
ask turtles [set energy energy - 1]
, N( ~* R6 }$ bend
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发表于 2008-4-8 10:49:43
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