Constraining part of a surface during deformation


I am trying to deform the surface highlighted in Figure 1 so that the cross section of the surface changes but the interface with the second surface is maintained. Currently, when I try to deform the surface (using point deform), it ‘pulls away’ from the second surface (Figure 2). Is there a way to constrain the surface so that the bottom end curve which interfaces with the end curve of the other surface can be maintained during deformation?



Figure 1:

Figure 2:

Variable Fold Profiles 2.3dm (21.6 KB)
Variable Fold Profiles (10.3 KB)

Hi and welcome to the forum!

For the question, the logic you can follow is this:
If you move all the points but those on one edge of an untrimmed surface, that edge will stay in position.
See how the join worked well… (rhino stuff)

So you can try by projecting the nurbs point of the starting curve to your plane, rebuilding the curve there and move the points again in another direction.
You can move the control points of an untrimmed surface and it will work the same way.

Variable Fold Profiles (13.9 KB)

Hi Riccardo,

Thank you! This cleared up the problem entirely, much appreciated.