I tried to solve my problem myself, then I looked for the answer on the Internet.
I’m trying to use Offset on multiple surfaces.
1.I start with mesh
2. convert it to Surfaces
3. applies the same Offset to all Surfaces
offset.3dm (450.2 KB)
offset.gh (4.3 KB)
the most frustrating thing is that it worked for me yesterday, but I wanted to make changes to the object, and it doesn’t work anymore.
I am looking for help
I would like the offset to be directed in one direction, in or out
thank you
And your GH file is not connected to your Rhino file. That’s all there is 
thank you, I can’t see any message. where can I find Unrecognized Object window?
It pops up when a GH file is opened and plugins used by it are missing. I don’t have Pufferfish.
You wrote GH file is not connected to Rhino file.
When I change the GH file, I see the result in Rhino, but I don’t like the results.
How can I connect these files?
The Srf param in the image I posted, unless it is “internalized”, is supposed to being geometry from Rhino to GH. That happens by selecting geometry in Rhino and then right-clicking on Srf in GH. Very basic stuff.
P.S. Since you are using ‘Offset Curve’, it appears you are treating surfaces as curves?
I’m not an eagle 
, that’s why I’m looking for help.
I see results when I change the GH offset parameter. When I select multiple surfaces, some of them have an outside offset, others have an inside. Maybe it has something to do with normal, but I haven’t found anything about it.
Yes, I treat triangles as curves, if I only deal with 1 triangle and didn’t like the direction, I would change (-/+), but I want to change 30 triangles and I see that there is something wrong
Maybe there is another tool I can try?
In this GH file, Srf is internalized, no need for Rhino file (though this image shows it).
P.S. Surfaces sorted by Y and X: (for no good reason)
I would like to understand GH 1/4 as much as you .
But even in your results you can see that the offset is either outside or inside. I would like the offset to always be inside
Thank you very very much.
It looks like it’s working, unfortunately not on my side 
.
There must be something wrong in my system.
At the beginning I don’t have any results, when I delete the offset and put exactly the same one, then I have some results. All the vectors are pointing up, but the offset is still in or out.
Thank you very much, I’ll have to sleep on it.
as I wrote earlier, it worked for me yesterday $&^&^#^#
Here is a different way.
Instead of flipping the surface normals it flips the edge curves with a circle as guide.
It looks like it’s working!!! , I’ll check it tomorrow
GH is a very useful tool, it makes me jealous that I don’t know GH like you do.
Now I can think about the next step
Thank you very much for your help
It’s customary to mark the post that provided the “Solution”, not your own post that acknowledges it.
Sorry , silly me
