zeffii recently provided a nice demonstration of using Sverchok to loft between edges (Sweep along a path through multiple cross-sections).

I was wondering whether it would be possible to extend this functionality to provide more control about how the loft interacts with each edge .

Here's an example of what I'm talking about...

enter image description here

Using a simple array of vertically-stacked, similar rectangles, I've constructed a series of loft objects (vases, I think), demonstrating some of the different ways the curve of the loft might meet each edge it comes across.

I trust the image is self explanatory, but I'm happy to (try to) elaborate if necessary.

  • 1
    $\begingroup$ We (Sverchok 2020, Feb) have no single node that encapsulates this behavior. But it touches a topic that I find interesting, the problem is only really; "How does one offer a convenient way to the user to tell that node how to interpolate between the various Quads". (Quad could be any Ngon ofcourse..) . We could initially offer a set of standard options as you list in the annotations to those images. $\endgroup$ – zeffii Feb 4 at 10:38
  • $\begingroup$ Looks like a job for curves, taper, or maybe re-written nurbs? Would be nice to generate a taper control object based upon the number and relative distances of the cross sections. You might even make a taper control for each side or vertex / edge through multiple cross sections? Can Sverchok handle curves and taper objects? $\endgroup$ – Coby Randal Feb 4 at 19:32
  • $\begingroup$ I'm learning that questions like that are like a red rag to a bull, so keep them coming (yes I'm aware that bulls are colour blind) $\endgroup$ – Strawberry Feb 4 at 20:13

A current "lazy" approach to this. might be:

enter image description here

I use a few VD nodes here to emphasize the original Quad outlines (light blue), and the resulting interpolated outer edge (red). Note that the Plane (Mesh) Object has a Vertex order which is [0, 1, 3, 2], and we need both Verts and Edges to order the vertices (using Vector Sort) for the "connected" algorithm to get [0, 1, 2, 3].

The Smooth Lines node offers "Weights" input. When using the slider all verts are treated the same, but you can pass it a list of values (ranging from 0 to 1) to effect vertices uniquely.

I feel perhaps that this does not provide a full solution to your question, but sometimes even a partial answer can be useful.

| improve this answer | |
  • $\begingroup$ Well that's basically genius. $\endgroup$ – Strawberry Feb 4 at 11:22
  • $\begingroup$ You answered that one so quick, now I'm wondering whether to give you something else to ponder upon... $\endgroup$ – Strawberry Feb 4 at 11:35

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.