Can't figure out why Point Deform not working in this case

[Quan_Li]

Point Deform Practice.gh (30.4 KB)

As titled!
Help!

[HS_Kim]

It seems if you change the default “Interpolate” value of Surface From Pointsto “True”, then the control points of your surface change…

Point Deform Practice_re.gh (25.9 KB)

[Quan_Li]

Thank you!
Somehow I saw this “I” as “V”, and feed V count into it, and then tried to figure this out for 2 hours…