请问：% J; c& ~7 c( N
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？& a1 X; ]( H5 l5 B2 r
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turtles-own [ energy ]
* K6 e* H! F' o0 O* [to setup$ F" @: S" K/ T+ j2 l
clear-all% I0 i$ l; H# A/ N s& e
set-default-shape turtles "square"0 A* ?6 ~2 F1 W" n8 E
crt nutrition
: `4 k: U0 V: [9 J H. Aask turtles[' H# f3 ]! O! L F4 L# I
set color white1 j/ X+ F9 s: U) A5 m
setxy random-pxcor random-pycor] _- i) D3 }# ]9 g e+ e
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ask n-of microbes-initialization patches
' w; P( [. U$ h) J4 l& u [ set pcolor green]
$ `, R. h1 F5 S5 ] ask turtles [set energy 1], U) R! Y/ p6 }" b e
end( x, w9 _2 F# h# W) m. O6 f. m3 J
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to go
7 x9 Z9 y8 v% X6 A/ \6 \$ |; R5 h ask turtles [set heading 90 * random 4 fd 1]! w4 P; c }0 N. }, c6 \
ask patches with [ any? turtles-here]! ]- G L7 ~' Z
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]+ Q3 w) R. x, r. N
ask turtles [ if energy = 0 [die ]]( a. _3 R$ ^# s3 Q4 t9 d$ d
end
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" ^' A7 p( i0 o' X# fto tt
$ d" K8 {4 n8 c7 F; oask patches [set pcolor gray ]
% V' [. S: {, s& m# gask turtles [set energy energy - 1]
1 Z+ {5 f: E% _9 E& ?end
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发表于 2008-4-8 10:49:43
楼主
