step by step就可以 @SB+u+mOS
4 l(o{{
point1: Location of the first copy that resides in the center of the circular array. :UciFIa
copies1: Number of copies along the spoke (including the center copy). @h3)!#\N
point2: Distance between the spoke copies and direction of initial spoke. @>ZjeDG>
copies2: Number of spokes.