Hi Everyone, As the title suggests and hours of troubleshooting I am having issues getting the “Unroll Polysurface” parameter working in Grasshopper. It shows them squished and at weird angles instead of laying out straight. I have a series of extruded rectangles that I am trying to use this param…

The problem is caused by extruding with Z vector when your lines are not horizontal. That causes angled sides, resulting in angled beams when extruded again. Sorry I didn’t notice this the first time. P.S. Try this? [Beam Extrusion_2024Aug12a] Beam Extrusion_2024Aug12a.gh (28.9 KB) P.P.S. I…

Your boxes are cut at an angle; they are not 90-degree boxes. I didn’t dig in your script but testing item [0] the unrolling seems right. [image]

I don’t have Pufferfish but OpenNest2 (R8) Unroll looks OK to me. [unroll_2024Aug9a] Full Size

The scripted version also works fine. The orientation in a grid could be simplified. [image] [image] Unroll Srf Beams.gh (902.4 KB)

[image] Jack Christopher: i think the rotation and alignment of your extruded rectangles might be causing the unrolling issues @Jack_Christopher , you are mistaken. The orientation of the source geometry has no effect on the unrolling result. As @Rezza_Nick , @Joseph_Oster , and @martinsiegrist …

Thank you everyone for the insightful replies! It’s good to know that the unroller will work even when objects are rotated in model space. Like everyone said, it appears my extrusions are not coming across how I want in the script to where the source geometry has 90 degree corners. Unfortunately, I…

Wow @Joseph_Oster thank you so much for this, exactly what I needed for my workaround!! The added script at the end for the unroll is also very appreciated! I’m still very much learning Grasshopper and learning what components do what as I go. Could you briefly summarize what that part of the scrip…

[image] kip jarrett: Could you briefly summarize what that part of the script (past the unroll) is doing? Are you referring to the ‘Tree/List Viewer’ tool? It’s a general purpose tool I wrote for examining data trees of geometry. In this case, when you move the ‘path idx’ slider you scroll …

Oh yes, I see it now and how you have it connected to all 73 beams, and how the “path idx” slider is ordering them in order of height. Really cool stuff. Thank you!!

The ‘Tree/List Viewer’ doesn’t do anything (“ordering”) but traverse the data tree from Unroll by branch (path) and item. Since there is only one item (beam) in each branch, it appears as yellow. When there is more than one item in a branch, all but one are blue. It’s a general purpose tool, not …

Unroll Polysurface not working - Please Help!

Grasshopper

martinsiegrist (Martin Siegrist) August 10, 2024, 6:51am 4

The scripted version also works fine. The orientation in a grid could be simplified.

Unroll Srf Beams.gh (902.4 KB)

Controlled Brep Unrolling for Production

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Unroll Polysurface not working - Please Help!

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