How to create stairs

Hello, Im new in Grasshopper, and I have a 3D model of an auditorium that I would like to replicate in Grasshopper. The problem is I dont know how to make the steps for the auditorium, I ve managed to loft some of them. What I expect is on the first attachement and what I managed on the second.

Thank you!

Attachments:

Captura10.PNG, 25 KB
QA GH.gh, 21 KB
11.PNG, 37 KB

Replies to This Discussion

Permalink Reply by Joseph Oster on August 31, 2017 at 5:03pm

If you really want straight, angled steps as in your first image, you're starting with the wrong inputs for 'TweenCrv'. This is a "cleaned up" version of your model:

Attachments:

QAGH_2017Aug31a.gh, 25 KB

Permalink Reply by F L on September 1, 2017 at 3:08pm

Thank you Joseph! That was very helpful, however is it possible to change it instead of a half elipse, a quarter of elipse like the attachement below? I ve been trying to do the same, but it wouldnt work.

Attachments:

Captura12.PNG, 14 KB
QAGH_2017_SEP1.gh, 10 KB

Permalink Reply by Joseph Oster on September 1, 2017 at 5:01pm

Attachments:

QAGH_2017Sep1a.gh, 22 KB

Permalink Reply by F L on September 2, 2017 at 10:55am

Thank very much! this definition was very useful to what I am trying to achieve! However, I was wondering if the stairs could expand on that quarter to the right (as the maximum). (maybe with the attachement below the idea is better explained)

Attachments:

Captura13.PNG, 20 KB

Permalink Reply by Joseph Oster on September 2, 2017 at 12:13pm

Just move the sliders! Anywhere you want. QAGH_2017Sep1b.gh

And you can easily disable the "bleachers" feature in the last version:

QAGH_2017Sep1c.gh

Permalink Reply by F L on September 2, 2017 at 12:26pm

Thank you, I ve been moving the sliders, but the maximum number that the slider allows me to "go right" on the ellipse is 0.005, until it goes to 0.000 and changes the disposition.

Attachments:

Captura16.PNG, 89 KB
Captura17.PNG, 143 KB
Captura13.PNG, 20 KB

Permalink Reply by Joseph Oster on September 2, 2017 at 1:10pm

Oh, that. It's the 'List Item' between the yellow and blue colors...

OK, I added a switch for that, in the yellow group. You could have gotten the same shape section 180 degrees away, avoiding the seam.

And I added two more switches:

'ellipse src': "Ellipses" grp or "guide crvs" (your own)
'bleachers': "On" of "Off"

Attachments:

QAGH_2017Sep2a.gh, 36 KB

Permalink Reply by F L on September 2, 2017 at 2:42pm

Thank you very much!! That was very helpful!

Permalink Reply by Joseph Oster on September 1, 2017 at 5:50pm

Attachments:

QAGH_2017Sep1b.gh, 31 KB

Permalink Reply by Joseph Oster on September 1, 2017 at 6:45pm

Two more features:

parametric control of the two ellipses.
bleachers!

Attachments:

QAGH_2017Sep1c.gh, 33 KB

Permalink Reply by Joseph Oster on September 2, 2017 at 2:05pm

Up to fourteen user-specified parameters.

Attachments:

QAGH_2017Sep2b.gh, 29 KB

Permalink Reply by F L on September 6, 2017 at 9:20am

Thank you very much! I´ve changed the definition to create a rotated elipse, but the previous auditorium definition worked for a plan elipse. I was wondering if it could be adaptable to the rotated elipse as well? I ve been trying to change the previous definition but had trouble.

Thank you!

Attachments: