$GRAB的用法是怎样的?我看了例子还是不明白,请大虾解释一下下面的例子,$GRAB的那几个参数到底是什么意思呢?谢谢~ Y oDL/
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SYSTEM NEW 2F7( Y)
RESET Ymvd3> _
oRkh>yj'
EMITTING DISK Z 0 1 1 1000 _:+hB9n s
m3T=x =
STATS POSITION 3uXRS,C
Gxh r0'
LNNwy:_ !
$GRAB 'Centroid:' 0 1 XCENT YCENT ZCENT {,NF'x4$
`\-<tk9
$REG XCENT YCENT ZCENT [&(~{#}M:
]`eP"U{
RETURN