I’m designing a bottle with a label and trying to wrap a rectangle around a complex revolved surface to see how the rectangle will deform vs a keystoned rectangle that was generated by extracting the area we want covered. The keystoned rectangle is shown flat and is the result of the smash command of the label that is currently on the bottle. the vertical rectangle is a similar size that i’d like wrap around the bottle to see how it looks… maybe this will be easier with acutal paper and the actual bottle i have!
IS there a way to wrap this rectangle around this revolved shape?
Start with a Rhino model of the bottle, or at least the portion of the bottle you want to wrap the rectangle around. If it is a simple cylinder then it is “developable” and the rectangle can wrap around it without any stretch or distortion.
Assuming the shape is developable: UnrollSrfUV the surface to be wrapped around. It can be helpful to have Labels=Yes UnrollSrf | Rhino 3-D modeling
The rectangle can be either a surface, a curve or a mesh. Position the rectangle over the unrolled surface.
I have some experience. FlowAlongSrf didn’t work for me. Did you see my image above? It shows the bottle I modeled, and my text explained that it is not a simple cylinder. I’d love your help if you can re-read my question and have an answer. Thank you!
1- Enable “Record history” and “Update children” (optional)
2- Unroll the base surface (glass) “G”, which should be developable. Is that a cone?
(if you extend the cone surface before doing this you’ll have more room to work)
Unroll surface command will create a flat surface “F”
3- Create your rectangle paper sticker geometry centered on the unrolled surface “F”
4- use Flow along surface of the rectangle from “F” to “G”
At step 2:
If your surface is not a cone, split that surface and extract the most-conical part (where the paper sticker would be put), shrink that surface, extend it top/bottom, continue with unroll etc etc…
I understand it did not work for you. But it should work with a different approach.
Yes, I saw your image. It appears that the portion with they lable is a cylinder, That is why I said (bolding added)
Make a copy of the bottle.
Split with the Isocurve option at the top and bottom of the cyllndrical part.
Delete the top and bottom of the copy.
ShrinkTrimmedSrf the remaining part where the label goes.
UnrollUV the part where the label goes.
If it does not work try Smash.
If it does not work try Squish.
FlowAlongSrf the label.
Is the problem the part of the bottle where the label goes is tapered which results in the unrolled/flattened surface not being a rectangle? If so you may need to use FlowAlongSrf to go from a rectangular surface to the non-rectangular flattened surface.
If you continue to have difficulties post a .3dm file with the bottle, the label, and your attempts.
Thank you - I follow now. So the bottle is an organic shape, but I took your advice and built the portion where the label goes as a truncated cone, which I was able to unroll. I drew a rectangle that fit inside the unrolled shape (what I was calling the keystoned rectangle, as you show in your bottom image). The only thing I can’t figure out is Flow Along Surf to apply the rectangle to the cone shape.
Position the rectangular label over the unrolled shape.
FlowAlongSrf
Object to flow is the rectangle
Base surface is the unrolled surface
Target surface is the truncated cone.
I was able to create the horizontal top and bottom (as well as sides) by clipping my bottle shape before reaching out, but this was the step i needed to fully visualize the decision between a rectangular lable on a tapering bottle vs a warped templated label with horizontal and vertical sides.
Thank you so much for the lesson and sticking with me.
