Smooth junction/blend a minimum of 4 extrusions

Here is an example of VB script for joining quite smoothly extrusions (minimum of 4). I used circles and rounded rectangles as profile for extrusions. But I think others shapes could be done.

These shapes are put on the vertices of a convex triangular mesh. The axes of the extrusion is oriented toward the average of the vertices of the mesh. At the moment the meeting point of the extrusion direction must be inside the convex hull of the vertices.

The script generate a BREP not a mesh.

It is still WIP, and as I have no project on that, no printer ... feel free to put some improvement or ask for some improvement. I will try (at my speed).

Apologize to the dark lord it is VB not C# :-)

Attachments:

blend_sections_new.gh, 31 KB

Replies to This Discussion

Permalink Reply by nardo chai on May 16, 2015 at 11:21pm

Wow, I like this. Thanks for sharing.

Permalink Reply by peter fotiadis on May 17, 2015 at 1:01am

Yikes! it's indeed in VB.

Other that that, congrats.

best, Lord of Darkness

Permalink Reply by Laurent DELRIEU on May 17, 2015 at 3:26pm

Still WIP, I need to treat points that are apart from the node. I think I will put virtual point, and I will need to make a Convex Hull in order ot get rid off the need of the mesh to describe the nodes.

On the progress I treat now the quad. No more need of mesh with triangles.

I also treat external (male) or internal (female) connections.

I need to improve the inner surface which junction the blend curves. I used curve network, sweep 2 rails, ... but the whole is not so smooth.

The red objects are the mesh I used to generate nodes.

Attachments:

20150517_blend_sections_wip.gh, 32 KB

Permalink Reply by peter fotiadis on May 18, 2015 at 12:19am

In case that you need some Convex Hull thingy

Attachments:

Convex_hull_and_del_mesh_V1.gh, 306 KB

Permalink Reply by peter fotiadis on May 18, 2015 at 12:26am

BTW: I'm sure that you know this already, but get the latest anyway (load Rhino file first)

Attachments:

Truss_from_GraphLines_V5.gh, 373 KB
Truss_from_GraphLines_V5.3dm, 364 KB

Permalink Reply by Laurent DELRIEU on May 18, 2015 at 11:18am

Thanks, I will use your def as a departure point for testing automatic generation of nodes.

After a quick look I discover 2 new things so I imagine it will discover many others things.

But first I want a better look for inner surfaces of quad face. I have to make some blending !

All the best

Permalink Reply by peter fotiadis on May 18, 2015 at 11:52am

Hmm ...

1. Is this for some decorative object/small stuff/furniture right? If so don't get "lost in the translation" (nice movie was that one, BTW). Who's gonna notice it?

2. On the other hand over there is the AEC thingy > I see challenges aplenty > for the brave > like this ... or that ...

keep walking the walk, best, Lord of SardineLand

Permalink Reply by 未知 on May 17, 2015 at 8:21pm