请问：
( d: Q! _5 _6 ?- R( W) b$ V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 ]4 p9 j4 H! k, `- Q) S6 `! J! }! j
to setup
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set-default-shape turtles "square"
6 F! E( d3 G4 X! Vcrt nutrition
; j0 v" Y' g( N% K* }7 q+ `ask turtles[" K6 t& x- G) X- e: g' o. K
set color white3 k; z- o: S* u2 F* G, @5 i6 C" S9 D
setxy random-pxcor random-pycor]0 O) m4 D C1 o h/ l( a. x
) n3 L. ]7 [" h/ e4 Kask n-of microbes-initialization patches
& v! S7 y% o5 A2 N# r [ set pcolor green]
, h8 |6 c/ }9 N W9 C ask turtles [set energy 1]% z2 f, j* X- n* h0 r- K
end
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to go# z# }+ O; v, f1 i6 f, t
ask turtles [set heading 90 * random 4 fd 1]0 y o" u7 Z1 U J6 c0 v: }
ask patches with [ any? turtles-here]
[, n j- ^8 f% Z7 V6 [9 s$ `7 X% I6 W [ if pcolor = green and random 100 < chance-of-congregating [tt ]]
" _* F4 c% k5 d$ U: d5 `5 z ask turtles [ if energy = 0 [die ]]2 c& h: h8 Y5 J1 W+ F7 i5 X
end
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ask patches [set pcolor gray ]
) A5 ~ i( {2 s& _! z0 o& jask turtles [set energy energy - 1]
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发表于 2008-4-8 10:49:43
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