Envelop of lines network , mesh and funicular structures

After playing with Kangaroo on this discussion and as I like a lot Marc Fornes structures I wanted to go a bit further with Kangaroo and also making some mesh automation.

So the question is: how to make quad mesh usable with Kangaroo and with limited inputs parameters in order to simulate funicular structures like "Vaulted Willow" or "Pleated Inflation" from Marc Fornes and the Verymany.

Here is a first attempt script.

As inputs there are :

Lines_in, just lines, no duplicates, on XY plane could have Z values, but the algorithm works on a , on XY plane could have Z values, but the algorithm works on a flat representation.

Tolerance is used to glue lines when points are closer than tolerance

Width is the half width of the “roads” going through the network

Angle is the shape of the ends of the roads, 0° means flat end, 180° a totally rounded end

Deviation is the shift generating spikes or enabling to generate pleated geometry

N_u is the number of subdivision along the “roads”, image above with 3 subdivisions on the roads

N_u is the number of subdivision across the “roads”

Zbool if false everything is flat, if true the mesh is in 3d, best with angle = 180° or -180°

For the outputs there is the topology of the network (like Sandbox)

As outputs geometry are put on datatree, each branch represent a path on the road, above 3 paths, which are brep output.

Adding a diagonal there are now 4 paths so 4 branches

The mesh M goes with F which are fixed points, anchor in Kangaroo.

U and V are lines in datatree, there will be used as spring in Kangaroo, U above

This script could be used to draw sort of roads, like in here https://codequotidien.wordpress.com/2013/03/22/hemfunction/

But the primary purpose is to do that.

Attachments:

envelop_curves.gh, 34 KB

Replies to This Discussion

Permalink Reply by Laurent DELRIEU on January 15, 2016 at 1:19pm

Some of the misses lines, it is my fault, Mea Culpa, I put a limit on the while " while ((panels.Count > 0) && (test < 100))"

Here is a script without the limit.

If you need surface Daniel made an offset with variable distance.

http://www.grasshopper3d.com/photo/the-variable-offset-component-sp...

I corrected some parameter, n_u was not test so n_u of 1 is not good ...

here with a mesh

Here with some roundness

Thanks for testing and giving feed back.

Permalink Reply by Laurent DELRIEU on January 15, 2016 at 2:54pm

Still some issues depending on attractor position, but works more well in 3d

Attachments:

envelop_curves_v03.gh, 51 KB

Permalink Reply by Laurent DELRIEU on January 16, 2016 at 10:57am

Christian

I added a circle for calculation of widths of veins. So you could put attraction point near/on root.

Attachments:

envelop_curves_racines.gh, 59 KB

Permalink Reply by Daniel González Abalde on January 16, 2016 at 1:50pm

Nice results Laurent!

Permalink Reply by spiral on January 29, 2016 at 7:46am

great job, is it possible to reduce the number of veins?

Permalink Reply by Laurent DELRIEU on February 1, 2016 at 10:29am

Yes it is possible. I havent' done the script to do the networks. It is Christian job. There are some explanation on his image

To generate points, he uses meshmachine

Permalink Reply by Laurent DELRIEU on February 1, 2016 at 2:14pm

Permalink Reply by Leaphr on June 24, 2020 at 11:59am

Hi Laurent, thanks for sharing the great method!

I just wonder how can I smoothly join the ends of the veins with an outline like what was showing in your heart example?

Permalink Reply by Laurent DELRIEU on June 27, 2020 at 11:10am

Use border mesh edges named E1 in the grasshopper component. @leaphr

Permalink Reply by Leaphr on June 28, 2020 at 12:27am

@Laurent DELRIEU, thx a lot for the reply, I end up with a bit complex way by collecting the points of naked edges and sort them into a clockwise order. I will try your method again :D