请问：# F* [* @0 \% y
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？, L6 e2 D+ D6 s' G( J
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: d0 o% X q8 A: Tturtles-own [ energy ]
: b4 A2 x' W* C; N- hto setup/ g- G+ D( Y) i
clear-all+ h7 N4 f+ E" C/ R
set-default-shape turtles "square"3 Y' S) |" |4 X# _) }
crt nutrition! G/ v. N- Z2 ^& `8 y% L/ ~
ask turtles[! U$ X5 p0 _& g) t( @5 F5 |6 z
set color white8 F! x' l! d1 I3 }" L. i$ `
setxy random-pxcor random-pycor]
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. m ?4 j ~* Iask n-of microbes-initialization patches0 [6 n6 d0 R0 X, f
[ set pcolor green]
8 r2 v1 y2 C% d3 g. v- t% { ask turtles [set energy 1]
8 I4 |6 Z0 W# ~6 V) h/ X) D" m/ p) Uend
: o$ v, L4 J1 R9 E' t2 Y
' A+ M9 l1 [/ B4 n5 hto go
# I6 {1 h9 B+ z p- h ask turtles [set heading 90 * random 4 fd 1]
& h: C( C1 ^" h( H& ^ ask patches with [ any? turtles-here]0 A" o. J& K1 x4 [8 d9 }
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]" K9 z4 O$ L: s! v1 a4 C" C; K
ask turtles [ if energy = 0 [die ]]
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to tt9 w( O* w/ }% v8 F) _6 [4 Q
ask patches [set pcolor gray ]4 ^+ Q6 c$ b& v
ask turtles [set energy energy - 1]
7 J2 ^; L0 o% f9 Eend- Y4 Z; ?7 Q, x* i" h) u( X
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发表于 2008-4-8 10:49:43
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