Problems transforming an helix

Hello,

i'm working with helix for a university work and i'm getting crazy solving problems in GH, i'm not used to work with it and it being to me a "bit" difficult. If someone could help me i'll be very grateful.

Well, i get some explanation of my problems:

First of all, i was working on making an double helix building, thing that i've solved making a sketch of lofting an transformating helix., but now i want to make some transformations to the helix, to make it less boring.

I want to transform the helix making somethin like that, making displacements on the helix to let the sun get in the building.

Well i've tried the ways that i know, but i'don't know if it's a better way or simply way of doing it.

i've attached my working files where i explain where i've get stuck

I've tried by this ways:

1) selecting the part of the helix wich i've want to transform.

This selection that i've made i think that was rought, i think that the best way to select the part that i've want to move is by the turns, but i've get lost in this way.

When i've get this points and i move it, if i divide the original helix in a few points it seems to work, but the result appears to be an helix but it isn't because i've made interpolation with few points.

If i divide in lots of points, when i make the "transformation" it isn't what i've expected, i think that i have to move this points in a gradiend move, to get a nice deformed helix.

This way is on the 1.ghx

2) The second way that i've tried is with map to surface, and morph box, but here i don't get the transformation thay i've want, or i don't know if i'm doing something wrong.

This way is on the test1.ghx

In the rhino file attached there is a "transformed helix" that i've want to obtain in GH, made by rhino, it's the blue one. It is the result that i've want to get,the displacement in xy plane, and after that transformation continue the helix.

1.ghx

test1.ghx

test1.3dm

Thanks for your attention.

Replies to This Discussion

Permalink Reply by Danny Boyes on March 13, 2011 at 8:05am

I've got to rush off, so the best I can offer for now is a definition of a Helix in grasshopper. This was going to be the foundation of something for me to investigate you problem.

Attachments:

HelixDefinition.ghx, 824 KB

Permalink Reply by mfcb on March 15, 2011 at 7:46am

Thank you very much!!

It was useful, but i think that in the final way that i've used i could have used any helix definition, but yours was the better that i could use because of the option to control the number of points in each turn.

I think that i'm close to the result that i've want, but i have some problems.

1) I've only want to modificate an helix between 1.5-2 turns but in the spiral definition i only can use entire turns, but when i reduce the turn parameter the sweep goes crazy.

2) I wondered to use instead of the gap height, the total height of the helix, because i've a limit of 10m. I've tried to change the helix, but i haven't got good results.

My goal is to obtain in grasshopper an double helix like the picture en the at the top, but with the option of deforming the parts that ive splitted in GH.

If anyone could help, i'll be very thankfull

Thanks for your attention ;)

Attachments: