How could improve OpenNest

Grasshopper OpenNest
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1

Hello Everybody.
Im trying to optimise my nest set.
I already tried many combinations but it seems it dont fit more than that.
I have notice that most of the time increasing rotation dosent help a lots
What do you suggest guys?
Thanks
Nico

Open Nest 01.gh (152.2 KB)

2

If you think about this problem then it can be decoupled into several parts:

  1. find a minimal bounding box of a curved piece (principal component analysis)
  2. try to minimize numbers of points per polylines since it would reduce computational time (link to video)
  3. nest using 2 rotations only because translation will only be computed during nesting:
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    image3397×987 231 KB

For simplifications watch the third video:

Open Nest 01 Petras.gh (174.5 KB)

This is for all 261 elements using two rotations and only after 1st iteration:

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image2943×671 42.2 KB

Open Nest 01 AllSheets.gh (177.5 KB)

If you want really to reduce computational time and pack more in less sheets, then I suggest to orient your curves in one direction, either positive or negative curvature, then the solver would not need to guess how to rotate the piece. I am sure you have this information in your code. Then you can set rotations to 1

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image2085×365 8.8 KB

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Hi Petras, thank you so much for your reply! And sorry I didn’t thank you earlier!! Your help was very useful. thanks Nico

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Hi Petras,
A discussion i had with Chat (..the GPT bro):

Exactly :white_check_mark: — that’s actually the frustrating conclusion with OpenNest v2 if you’re using it purely within the Grasshopper stream:

The Transform output does provide the transformations that OpenNest applies to its own newly generated outlines.

But because those outlines no longer correspond one-to-one with your original input, you cannot directly apply those transformations to your “real” geometry (like labels, points, drill holes, etc.).

I made a small grasshopper component that uses the output objectID and output transform, to move original geometry and het group of objects with that object to the nested location.Works like a charm. But in V2, the transform output is connected with the input geometry, new optimized, reordered curves with no connection with the original geometry. How can we use the transform output if we can’t find te original of thad object?