how to move some points in each element of my structure?

So, I'm really new at this, and I'm not finding Grasshopper easy to understand.

I've read and watched lots of tutorials, but I still don't get it. That's why I'm trying this new approach, since the project's deadline is near and I'm forced by my boss to use this program.

If anyone could help me that would be really great!

I'm designing a structure that you can see in the attached image.

And I wanted to move some of the main points (in the arcs) through z and x, in each element.

The thing is, in all my ignorance, I actually figured out how to move the points I had in a polyline but that was just about it. I don't know how to do it in a solid (so that the two same points from the oposite surfaces move at the same time, supposing that's even possible).

Replies to This Discussion

Permalink Reply by David Rutten on May 12, 2013 at 7:12am

Hi Laura,

what do you mean exactly by 'points'? How are the current arcs defined? How do you want to control the motion of these points?

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by David Rutten on May 12, 2013 at 7:57am

It's very difficult -often impossible in Grasshopper- to change an existing polysurface. There are no control-points for you to modify. So I'm wondering how you created the orange polysurfaces and how they are defined.

The only complicated bit seems to be the curved inner boundary and it would probably make a lot more sense to import just that curve and make everything else from scratch.

I still don't understand what exactly you're trying to do though. Phrases like "change the geometry" are too vague.

If you're only looking to scale a shape (make it higher or wider without changing the relative form) then that at least is easy. All you need to do is figure out for every arch how much higher/wider it has to be, then you can use Scale NU (Scale Non-Uniform) to make it so.

In the attached file I use the distance of each arch to a guide-curve as an indication of arch height: