Closed Solid Polysurface -> A sheet using OpenNest

Grasshopper OpenNest
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1

ForForum.gh (14.1 KB)
I am currently using this workflow I have created to quickly make tessellated site models using topography from site surveys for my firm.

CAD topo lines → SketchUp → Rhino7.

When imported the SketchUp model we do:
Import as mesh
ungroup
ReduceMesh to 30 polygons
MeshtoNURB
select mesh
hide it
select polysurface
uncheck “show surface isocurve”.

Now at this point, we can just UnrollSrf and attempt to optimize a sheet ourselves. But, I’ve been looking into OpenNest and there’s a script that will do this for you. (See Attachment)

However, I have tried a multitude of things to try and get it to work and unfortunately it will not.

I appreciate y’all taking the time to respond!
Thank you in advance!

EDIT: I’ve redone the screenshots to be true to the issues. The Crv on the left is connected to the ‘closed solid polysurface’, and the Crv on the top-right is connected to the “sheet.”
Also, the screenshot illustrated the issue that I keep commonly getting “1. Solution exception:Object reference not set to an instance of an object.” and “2. Data conversion failed from Curve to Plane”

EDIT: Uploaded Rhino & Grasshopper files.

screenshot-grass
screenshot-grass987×672 40.7 KB

screenshot-withstuff
screenshot-withstuff1917×718 183 KB

Unitah_Site_Optimized_Workflow_0001.3dm (284.0 KB)

2

Upload a file.

From your screenshot we can only guess.
I guess your grasshopper geometry has no geometry.

3

I’ve redone the screenshots to be true to the issues. The Crv on the left is connected to the ‘closed solid polysurface’, and the Crv on the top-right is connected to the “sheet.”

4

You need to upload a file …internelayze your geometry in gh.
Right click on the crv components and than internelayze.

5

Apologies. I have uploaded the Rhino and grasshopper files.

6

Sorry for the late response.
The problem are two faces from your object that are without a area…its like a line so the solver cant calculate a solution
ForForum.gh (94.7 KB)

7

Hey, man. Good work! I appreciate you doing that. From here, how do we integrate the “pack objects” feature with OpenNest to optimize the sheets?