I have a number of Trimmed Surfaces created by Trim Solid on the results of a Copy Trim. These are not merging with an Untrimmed Surface that attempts to connect everything. Some of these pieces are complex shapes so I can’t get their borders and use a surface tool. NetSrf does’t work either.
Why all the fuss? I need to Unroll the entire continuous sequence of shapes for fabrication. I’ve worked with this from the curve level with Region and Brep Trim but I lose the surface curvature. Unroll needs a surface.
The problem is Unroll treats the Untrimmed and Trimmed Surfaces as two different entities. The Untrimmed piece (vertical band) appears to be “ripped” away from the Trimmed Surfaces. This is because they are being treated separately.
Somehow, I need to merge all the surfaces so that this interior curve of the Untrimmed Surface goes away and everything acts as a single surface.
@rajeev_pulari Yes. The final form depends on how Unroll decides to deform the shape planar. I think your answer is best, especially if this is supposed to be something like a crown because it can be taped together in two halves and will have continuity along both longer edges.
The form could also, however, be made to transform a V iso-line at 0.5 (reparametericized) into straight line.
Flowed Curves.pdf (358.2 KB)
Thanks Rajeeve and Volker, I appreciate your effort and I’ll be able to work with some of the ideas you presented.
The shape I gave you initially was a crown because I omitted the other border for simplicity. The actual shape is more like a strip of old celluloid film that was left out in the sun.
I’m able to trim the curves while in their wrapped place then as suggested run it through the Flow component. This seems to be the way I’ll proceed for now.
Hi Volker, just wanted to let you know that I have returned to your example description and I will use it. It’s an elegant solution to where I’m headed.
I was a bit frustrated during our initial discussion but now I see how your effort has really made a contributing difference.
I want to project the offset curve onto the surface so I have two tightly wrapped parallel edges. These edges (curves) will be lofted for a single band that can be unrolled and patterned.
Thanks Rajeev. I like your approach but it lost its parameterization with the hard coded panel of indexes.
My new way works with some surface curvature precision loss but it will have to do for now and of course the ultimate goal is to get it to unroll and that still doesn’t work.
BTW: How do you display an image (like you did above) in this forum?
