请问：% h+ Y. z: W( Z. h% ~. Y+ H
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？
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turtles-own [ energy ]
8 F- j- K6 Y' B1 ~0 h" tto setup
& B6 ?4 ~' e v0 qclear-all
9 F1 b6 V4 s" |; c. @/ _8 J* Mset-default-shape turtles "square"$ w6 \6 A3 x2 s) `& d
crt nutrition. r- G* N5 @+ e: A8 q* D: [! m9 e
ask turtles[
7 `2 [$ r$ p* W, ~ set color white; H! ^+ `5 @+ { f- I
setxy random-pxcor random-pycor]
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ask n-of microbes-initialization patches) s* S1 _" h" d
[ set pcolor green]
$ E- }! Y) j, i# L7 u ask turtles [set energy 1]
, f4 h! p8 S+ G( j* @end
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to go6 @% |! F- ]& ~+ T
ask turtles [set heading 90 * random 4 fd 1]" p- d) M2 c7 T* |+ @; _
ask patches with [ any? turtles-here]
# T& c$ L5 _8 W2 M. c2 w [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
9 R, x& h( r$ K$ I2 A! E ask turtles [ if energy = 0 [die ]]* s9 Q' L$ `$ r+ o
end
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to tt
- e( p N( O4 R5 t; nask patches [set pcolor gray ]! y& O; d" Z8 V b
ask turtles [set energy energy - 1]
5 K$ {* K5 E; |+ Q* U6 X- Tend
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发表于 2008-4-8 10:49:43
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