HELP! "Offset surface" splits the surface and offsets them in different directions :(

Hey,

I have a little problem. I want to offset the surface you can see in the picture on the right site. The surface on the left site is the result I got by Grasshopper. The Grasshopper code worked on easy samples without problems but on this multiple surface it didnt worked. Someone knows why? PLz help :)

Replies to This Discussion

Permalink Reply by Yoann Mescam (Systemiq) on September 14, 2011 at 1:06pm

Well of course, with a simpler (and clean) polysurface, it should be lot easier.

By the way, you generated this from a point cloud ?

I wonder if you could do better with just grasshopper instead of using rhinoresurf. Upload the original points or mesh if you are interested.

Permalink Reply by Test123 on September 14, 2011 at 2:40pm

I think I am not allowed to show you the point cloud but here is another easy sample the pointcloud i used consists of around 40000 points.

Is it possible to convert the pc into a surface in grasshopper?

You could try it with the small sample

Attachments:

Forum - Sample.3dm, 959 KB

Permalink Reply by Yoann Mescam (Systemiq) on September 14, 2011 at 4:16pm

Fast try.

Attachments:

ForumSample.3dm, 1.1 MB

Permalink Reply by Yoann Mescam (Systemiq) on September 14, 2011 at 4:35pm

For your information, the average distance between sample points and surface is 0.013175, standard deviation 0.029748. Mostly because some points are ignored.

Not great but I preferred a nice looking surface.

Permalink Reply by Test123 on September 14, 2011 at 5:46pm

wow that looks good :)

and it is possible to create the surface automatically in grasshopper if you have the point cloud? Just choose the points in rhino and thats all? Or is it more complicated?

Iam interested definitely !!!! :P

[what I found is MeshEdit in the description was an function to convert a point cloud into a mesh but i havent tried till now I will do it tomorrow (for grasshopper too)]

Permalink Reply by Yoann Mescam (Systemiq) on September 14, 2011 at 6:05pm

Basically if the 40000 points are behaving like the 4000 points, yes, choose, click, wait, bake.

No way to tell though, I am not expert at all in 3D sampling etc.

Permalink Reply by Test123 on September 15, 2011 at 5:50am

would it be possible that I could try the program on my point cloud or dont you want to hand out?

This is a very interesting topic i think

Permalink Reply by Yoann Mescam (Systemiq) on September 15, 2011 at 9:43am

Well anyway, for some reason you cant open my definitions.

contact@systemiq.eu if you can send the big point cloud for testing.