Hi, why does the flattened surface have gaps, when the original shape doesn’t?
Hey, just a head’s up, if you want a better shot at people giving you a helpful reply on their first try, you’re going to have to give a bit more context. What is the object? Can you share the file? What are you trying to do?
It’s difficult to tell what’s going on or what you’re aiming to do from just 1 zoomed in picture.
As Vince says, more context would help.
However, I’d say off the top of my head that you are unrolling an polysurface. Hence the gaps.
You could try Explode=No in the Unrollsrf command line, however there is a very good chance you’ll get overlapping unrolled surfaces.
1 Like
I did press no to explode because I got a lot of unattached shapes.
here is the model.
rhino forum.3dm (1.1 MB)
it’s a part of an arch.
it’s a polysurfacem, which is the issue.
Actually the issue is that you have a very messy polysurface. I can’t imagine how you managed to generate that.
I took that file, extracted the edges, rebuilt those and then lofted with straight sections. This then unrolls cleanly.
Hope that helps
rhino forum_ST.3dm (1.1 MB)
1 Like
i used sweep and thanks. the shape is meant to be multi-directional, has what you done maintained that?
Aaah, I didn’t notice that.
The attached now has that curvature in it.
Note that you now have the top and bottom surfaces as not purely developable. Unrollsrf will unroll them within tolerances, however a bit of error will creep in.
You also now need to decide on what your fabrication strategy will be. If you want to maintain that subtle curvature then internal ribs and a bit of heat and force would do the trick if working in steel. Or plywood - internal ribs, glue and clamps…
rhino forum_ST.3dm (1.1 MB)
1 Like
thanks a lot, steve. I am keeping the theoretical/rhino model with those multiple curves, but the demonstration piece, I am keeping it flat just to make my life easier.