请问：
, r+ {, ]+ k5 l! R! ] k# |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？8 Z- @: }$ X) Z% f. f# |
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turtles-own [ energy ]
- d6 E' z' L/ G: Q; Qto setup
) H4 k" u/ B4 u7 m7 z- c( z1 g1 y7 qclear-all- G1 p% E2 v5 L' k* E, }6 g
set-default-shape turtles "square"
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ask turtles[' u* G% ^3 y q7 _' T2 `! s$ _
set color white$ x$ c( C3 f3 A- P4 P0 Q
setxy random-pxcor random-pycor]
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2 s9 J$ s0 ^ m+ f* I: J, u2 Uask n-of microbes-initialization patches
9 w+ u! h+ Q# e+ Z' z% ^4 ` [ set pcolor green]" I7 i1 h) I0 n: H
ask turtles [set energy 1]
: C1 y& J1 k/ J Q3 nend
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$ N; d) r* n3 h3 ~, kto go
5 R/ q; D! R1 _; ~: p8 M j* E) y ask turtles [set heading 90 * random 4 fd 1]
0 t Q: N, S0 j ask patches with [ any? turtles-here]7 F2 u5 o O+ S( U2 i* f
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]
0 s7 M u' O5 H% Q) T. R' J" b ask turtles [ if energy = 0 [die ]]8 A) z8 \" J, p4 h
end
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$ F* v& Q: o* h' T4 N' H& D- E5 Bto tt
+ q# Z9 S! m4 Zask patches [set pcolor gray ]+ F5 w/ ?4 f- ]/ \
ask turtles [set energy energy - 1]
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发表于 2008-4-8 10:49:43
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