请问：
9 t7 J9 i. `2 k" ^% t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？# \+ X. o6 e3 S
! Q9 @% v3 v+ Q! K
7 b( r. R0 r0 Y, s5 Jturtles-own [ energy ]* c7 v- Z& j6 h8 M! {/ Q0 S% N6 M
to setup
+ B; X) M% c% Lclear-all
- L1 h: V3 I) Z; K" L& [! L9 G: F* ]set-default-shape turtles "square"
. I8 @ v. Y# _crt nutrition9 [% ^, F# l C6 j! H4 h, T/ b
ask turtles[ H0 j: q$ N- t- ?8 ?/ i% W+ K
set color white/ Y) [2 q6 }: x1 s
setxy random-pxcor random-pycor]
8 S) B" B' u6 L% |6 T
( o% H# e E7 P$ @ask n-of microbes-initialization patches
% J! X* D ]2 L4 P x" n; { [ set pcolor green]
3 I& O: f0 g0 D6 x' t' m ask turtles [set energy 1]
' Y1 s6 j- A8 J/ d4 H5 W$ A! wend
& ]1 G3 I; W1 b# G4 P/ A9 J, B$ N" s2 A' q c1 g4 f @6 R
to go, l' Q7 k; t8 B* z C
ask turtles [set heading 90 * random 4 fd 1]& x- @* E5 o# ~1 E3 m/ S
ask patches with [ any? turtles-here]3 d/ @5 c! C4 w; ]: v4 {& v
[ if pcolor = green and random 100 < chance-of-congregating [tt ]]
9 f9 K1 x5 X) x: T ask turtles [ if energy = 0 [die ]]
$ x1 C7 A/ I3 W) C5 q end- q! h/ E9 _0 R' E) E& z8 X
( c Y! H" f2 a4 h; D$ Tto tt9 m' D: _2 L9 h
ask patches [set pcolor gray ]
, f S, s# K9 bask turtles [set energy energy - 1]5 S$ S+ i8 \" B; R' x6 D+ l& `' }
end
* l9 ~; b- C! w. F% M* v( R" T4 m# h1 K0 p1 a& ?; [4 ~
|
发表于 2008-4-8 10:49:43
楼主
