Mesh offset without wb in C#?

Hello,

Is there is a method in rhinocommon or an approach how to offset mesh using C#?

I know there is a method using weaverbird. But i would like to do it in code.

Thanks,

Tom

Replies to This Discussion

Permalink Reply by Laurent DELRIEU on January 28, 2017 at 3:03pm

See the documentation here

http://developer.rhino3d.com/api/RhinoCommon/html/Overload_Rhino_Ge...

I uploaded Rhinocommon so it is quite simple to use.

Or the same thing :

for (int i = 0; i < m.Vertices.Count; i++)
{
m.Vertices[i] = m.Vertices[i] + Vector3f.Multiply(m.Normals[i], (float) offset);
}

A = m;

Permalink Reply by John on January 29, 2017 at 10:35am

Thank you for a reply.

In case I have unwelded mesh.
I have mesh where I appended other meshes. The shape looks like a simple box. When I offset it mesh looks exploded. Is there a way to offset unwelded mesh?

Permalink Reply by Laurent DELRIEU on January 29, 2017 at 12:46pm

The problem is that you need to move coincident point with the same vector. For unwelded mesh the normal at coincident point is not the same. It could be Normal at Face.

See on internet how normals are calculated

http://wiki.polycount.com/wiki/VertexNormal

http://www.slideshare.net/foofiM/polygon-mesh

...

So a solution could be to weld your mesh surely something in this order

mesh.append(other mesh);

mesh.Weld(20);

mesh.Normals.ComputeNormals(); # Attach normal vectors.

mesh.UnifyNormals(); # Make faces point outwards.

And unweld after that ??

Permalink Reply by Giulio Piacentino on January 30, 2017 at 4:58am