simple curve network?

Hi
I am very new to Grasshopper - But allready I have some stuff that I would like to do with it ...
Could I please have some some pointers how to begin learning to do this project ?

I have a real playground safety-net to design - it has to comply with playground standards DS_EN 1176
The standards states some rules about the sizes in the netting, but they are pretty simple actually, so I can adjust to those rules manually.

Its the drawing in Rhino that bugs me - every time i move a single joint, I have to adjust all other points, and the curves...
and thats a drag. But Grasshopper should be the way to do this in a clever way, right ?

I would very much like to be able to play around with the position of the joints, so that the attached lines follow the joints (called "anchor pts" in the attached 3dm file)

the "fixed pts" are where the net is supposed to be mounted on a sculpture, so they are really.. fixed

Any help to get started? I wouldnt mind to be pointed at several options how to do this, as I will start to learn Grasshopper by now

Thanks
Hans Henrik

Attachments:

sikkerhedsnet Grashopper.3dm, 2.7 MB
Screen Shot 2016-06-06 at 19.46.20.png, 58 KB
Screen Shot 2016-06-06 at 19.46.51.png, 30 KB

Replies to This Discussion

Permalink Reply by deli dumrul on June 6, 2016 at 12:36pm

i used interpolate for the curves from fixed points to center. and polylines for the circular ones, than connected them to a curve component for easier bake. but in this, there is no sagging on circular ones. for that what i can think is calculating mid point of every piece of those ropes and moving it a bit lower. but not sure how to do all in once.

since u're very new, incase u dont know yet, e.g. for matching rhino point to grasshopper component interpolate, right click on vector input of component and click "set multiple points" than seleck points on rhino. for turning gh objects to rhino objects, right click on component and bake, or chose components what u want to bake, than mid click and bake (egg symbol). for connecting more than 1 input to a component, hold shift while connecting.

good luck, it's fun to try something on grasshopper, just dont give up.

Attachments:

nets.gh, 11 KB

Permalink Reply by Hans Henrik Ohlers on June 6, 2016 at 2:48pm

thankyou ! very interesting - I can feel my brain melting to a whole new concept :)

Lots of stuff to take in at the beginning. I am a typical "hands-on" guy who builds my own models (sculptures) in real life.

what if I wanted to use a slider, to move each "ring" of points concentrically up and down, along the curved, diametrical lines ?

That would expand or contract each "ring"...

oh yeah, and sliders for the sagging too ? :-)

maybe too much ?

I could handle my project with your script now:

project the model to C-plane, and scale2D each group of points to desired position.

Make a loft-surface that resembles the general sagging, and project the model to this surface.

Then rebuild all curves to 3.degree , and pull the control points collectively, to fine adjustment.

But I would like to study Grasshopper, even though this project might get very complicated?

any suggestions?

thanks HH

Permalink Reply by deli dumrul on June 7, 2016 at 12:44am

i did something like that, just select your fixed points, that's all u need as input from rhino.

it may look confusing at first (that's because it's messy) but if u follow the lines step by step, i believe u can get it in short time. ask anything if u struggle.

p.s. i googled your name, and nice works out there, keep on

Attachments: