Is there a way to set the domain of uv surface?

[A.C]

It create points outside the surafce when I use Surface.PointAtParameter(Picture1). But what I really want is create point in side the surface. How can I make it?(Picture2)

[Vikram_Subbaiah]

@A.C

want is create point in side the surface

Avoid creating surfaces by Patch, instead build using using cross sections and guide curves

pointAtParameterDomain.dyn (17.9 KB)

[A.C]

Thanks a lot.