topic Elliptical (oval) stair in Modeling

Elliptical (oval) stair

Anonymous — Thu, 25 May 2023 14:57:05 GMT

is there a way to design a spiral stair with solid side wall based on an oval shape?

Re: Elliptical (oval) stair

Dwight — Sat, 06 Sep 2008 15:21:07 GMT

model it with walls and slabs.

Re: Elliptical (oval) stair

Anonymous — Sat, 06 Sep 2008 16:03:38 GMT

Dwight wrote:
model it with walls and slabs.

That's what I thought, but how can you get the side wall to follow the tread of the stair (like a spiral?)

Re: Elliptical (oval) stair

Dwight — Sat, 06 Sep 2008 16:07:44 GMT

you draw a curved wall and smack the treads on.

make a sketch.

Re: Elliptical (oval) stair

Anonymous — Sat, 06 Sep 2008 16:45:15 GMT

See here:

Re: Elliptical (oval) stair

Anonymous — Sat, 06 Sep 2008 16:45:40 GMT

...and here

Re: Elliptical (oval) stair

Karl Ottenstein — Sat, 06 Sep 2008 17:15:55 GMT

You can model such a wall with a curved wall, as Dwight says, and then trim the top and bottom of it by using the curved ramp object in the library.

Or, you can purchase the Objective add-on which makes sloped extruded curved objects pretty straightforward:
http://www.encina.co.uk/objective.html
but, the result is an object and not a wall, in case that matters, so no section skins, core-only, etc. See also this thread:

http://archicad-talk.graphisoft.com/viewtopic.php?p=126434&highlight=curved+wall+objective#126434

Karl

Re: Elliptical (oval) stair

Anonymous — Sat, 06 Sep 2008 17:29:42 GMT

But isn't the curved ramp based on a circle? My stair is oval...

Re: Elliptical (oval) stair

Dwight — Sat, 06 Sep 2008 17:33:41 GMT

CLose enough, but not a smooth trimmer.

Re: Elliptical (oval) stair

Dwight — Sat, 06 Sep 2008 17:34:53 GMT

closer view

Re: Elliptical (oval) stair

Anonymous — Sat, 06 Sep 2008 17:52:11 GMT

seems like I should invest in Objective. Looks pretty cool.

Re: Elliptical (oval) stair

Dwight — Sat, 06 Sep 2008 17:55:09 GMT

It is a winner.

Re: Elliptical (oval) stair

Anonymous — Sat, 06 Sep 2008 18:24:40 GMT

Do you have shares?

Re: Elliptical (oval) stair

Dwight — Sat, 06 Sep 2008 18:47:03 GMT

Actually, regarding OBJECTIVE, I'm angry AND grateful.

I'm grateful because our colleague Ralph Wessel saw a glaring hole in Archicad capability, figured it out, charges modestly for the solution and gives great support.

You should all buy Objective, whether you use it or not, just to support this independent company. I understand that there might not be that much application for angles and swooping curves among Archicad users seeing that strip malls, council housing and oppressive prison design [Prison design theme: "Keep 'em in!"] dominate here.

I'm angry because Ralph shouldn't have to do that - Graphisoft should be coming up with built-in capabilities that cover all of these darned Add-Ons after all these years. It is an insane game of add-on catch-up every time Archicad upgrades. If you are as reliant as i am on add-ons, it delays adopting the new improvements because your terrain modeler or whatever isn't yet current.

What i have to sell here is a bunch of books. That is where my 'shares' are.

Re: Elliptical (oval) stair

Anonymous — Sat, 06 Sep 2008 18:59:31 GMT

I made an elliptical stair in AC 8.1 using the mesh tool
and the slab tool. The shape is not a true ellipse but
a close approximation made by tracing a true ellipse
with the magic wand with the circle tool selected.
See attached.
Peter Devlin

Re: Elliptical (oval) stair

Tom Krowka — Sun, 07 Sep 2008 20:05:29 GMT

Hear hear, regarding Dwight's post about the add ons and upgrades. I've given up a couple of addons because of the extreme aggravation of keeping track of multiple add on upgrades across multiple workstations. There are nice, but not worth the added work.
Enough with the in name only upgrades. I agree GS should fill in the gaping holes.

Re: Elliptical (oval) stair

Anonymous — Sun, 07 Sep 2008 20:25:58 GMT

Dwight wrote:
Actually, regarding OBJECTIVE, I'm angry AND grateful.

I'm grateful because our colleague Ralph Wessel saw a glaring hole in Archicad capability, figured it out, charges modestly for the solution and gives great support.

You should all buy Objective, whether you use it or not, just to support this independent company. I understand that there might not be that much application for angles and swooping curves among Archicad users seeing that strip malls, council housing and oppressive prison design [Prison design theme: "Keep 'em in!"] dominate here.

I'm angry because Ralph shouldn't have to do that - Graphisoft should be coming up with built-in capabilities that cover all of these darned Add-Ons after all these years. It is an insane game of add-on catch-up every time Archicad upgrades. If you are as reliant as i am on add-ons, it delays adopting the new improvements because your terrain modeler or whatever isn't yet current.

What i have to sell here is a bunch of books. That is where my 'shares' are.

I understand what you mean and - honestly - I meant it as a joke.

Re: Elliptical (oval) stair

Dwight — Sun, 07 Sep 2008 20:31:43 GMT

Sure. You used a smiley. I saw that. As idiotic as smileys are. Especially the talking ones. [!!!@#$%] I don't use smileys. I would prefer little icons of rude hand gestures.

I exploited you to whip myself up into a manic state in order to progress my Artlantis book. And put up a proper plug for Objective so Ralph can get some sleep.

Re: Elliptical (oval) stair

Laszlo Nagy — Mon, 08 Sep 2008 22:23:28 GMT

Karl wrote:
You can model such a wall with a curved wall, as Dwight says, and then trim the top and bottom of it by using the curved ramp object in the library.

Karl, are you sure the Curved ramp will do it? I understand you are suggesting SEO with the Curved Ramp.
I tried to SEO a Mesh with the Curved Ramp and it did not work.
I realized the reason is that the Ramp is made using the TUBE command in GDL which does not generate a solid body, only the surfaces of the Ramp.

Re: Elliptical (oval) stair

Dwight — Mon, 08 Sep 2008 22:26:28 GMT

The curved ramp cuts fine - did you see my image from earlier? that is a ramp cutting a wall.

Using a ramp to cut a mesh brings other problems.....

MY MISTAKE: That was for the Villa Savoie guy.