var i:real* p& r9 Q( b5 D1 A
i:=z_uniform(1,0,1)
; {1 \, T) e- i$ g% v@.createattr("type","string")
2 Q+ R0 \5 l' D& N+ @# ~if i<0.23 e9 B, t! m; I3 e
@.type:="red"; ]4 [. N6 k7 ^$ B# d5 G
PartRecord["Number",1]+=1
0 w5 F+ \" |* A; uelseif i<=0.5 and i>=0.2
8 A) r3 d+ I8 a/ ?8 P1 ^! }4 m1 i @.type:="green"$ s% D4 v, w- {: P
PartRecord["Number",2]+=1
& |5 E6 c ^' g- Z' d1 [& c: aelse + U/ n* r: X- c, b. {4 b8 {
@.type:="blue"
, p8 y+ U4 ^$ O8 [. T1 n; L PartRecord["Number",3]+=1
2 U: z0 A+ s' |% |end2 u: q8 T- z8 J3 n. E2 D R
6 ?+ O# B, Q0 ^+ a) x
deleteMovables3 J8 ]( ^9 G- j9 T( e# X; f
PartRecord.delete({2,1}..{2,3})
. I) r# `2 F5 q7 H) V这是对的 |