Circular Ridge for Tubular Mesh Relaxation on Kangaroo?

Hi Guys,

I started from a tube-like mesh and tried to add a ridge that would represent a kind of plastic hoop stopping the nylon to fully minimise itself (picture below). I've tried the following things (after watching this tutorial from Daniel Piker on ridges):

To add anchors with a lesser strength where the hoops is
To add a bend force when the polyline of the hoop is
To increase the rest length of the springs where the hoop is
To combine the above (springs of bigger length + bend force).
Tried it both on K1 and K2 just to check

Apart from the anchor technique which keeps the points where they are instead of adapting to the geometry (not true to reality), the spring just creates star shapes (bend doesn't seem to resist the minimisation of the rest of the springs). See printscreen below - Any help would be great! attached is the definition too.

Thanks.

Arthur

Attachments:

Camille.gh, 51 KB

Replies to This Discussion

Permalink Reply by Laurent DELRIEU on November 29, 2016 at 2:40pm

Arthur

I looked at that, with no more luck than you. You can post it on discourse and/or Kangaroo Forum here. I think Daniel Piker look (receive email) when there are discussions there ! He answered on discourse 3 hours ago.

https://discourse.mcneel.com/t/mesh-relaxation-with-kangaroo2-lil-h...

Permalink Reply by Mohamed Naeim on November 29, 2016 at 3:31pm

Hi Arthur,

I am working on something, Its not complete ,

have a look, and tell me if the solution is close to what you are looking for

I mean the part where I used hinges for foldings

Attachments:

Origami 08.gh, 53 KB

Permalink Reply by recife on November 29, 2016 at 5:24pm

May be this way, with the "old" Kangaroo

Attachments:

kang.png, 229 KB
Cylindre1.gh, 56 KB

Permalink Reply by Ibrahim on November 30, 2016 at 3:16am

Hi Arthur,

How are you doing ?

The star shape that are shown are due to the element length of the ring. The input length in your model is 0.5 however the original length of the ring elements is much less than this, that's why star shapes are generated.

If you use a ratio of the original lengths you will get rid of those star shapes.

Thanks.

Attachments:

Star shapes.pdf, 453 KB
Camille.gh, 50 KB

Permalink Reply by Manuel on November 30, 2016 at 4:40pm

first, i didn't look your file... sorry for that.

second, i solved this using on the inner rings the followings kangaroo components:

1. length line with the original length,

2. coplanar points and

3. the angle component for a "rigid" ring.

If you dont use the coplanar component, you get a "nice" deformation like using a flexible inner ring, also, the coplanar component give me error with higher resolution mesh (i just erase it and put a new coplanar component... weird bug).

i think it is working correctly...

Attachments: