Solid difference problem

Grasshopper
1

Hi there,
I’ve a problem with solid difference.
The code is very simple, and I can’t understand why doesn’t work. The surfaces are quite complex, but with another surfaces more complex it works.
Basicly I convert meshes in polysurfaces, extrude them and than perform the difference. Unfortunately the difference return the same starting solid.
I’m doing something wrong?

Thanks in advance
Giovanni

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image1335×802 63.4 KB

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image1596×626 78.5 KB

SolidDifference.gh (724.5 KB)

2

difficult to say :slight_smile: I crashed my GH 5 times without reaching a non-working solution :slight_smile:

would it be useful to project the vertex points of upper mesh into the lower mesh, and if there’s nothing they can be projected into then just move them -Z by 10’000 ?

in theory this should “rebuild” just the bottom part of your boolean subtraction:

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image1734×570 166 KB

SolidDifference_Re.gh (729.2 KB)

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image1578×633 145 KB

[btw: top mesh has been tri-remeshed]