topic Re: how to make an oval dome? in Modeling

how to make an oval dome?

Anonymous — Tue, 23 May 2023 12:58:17 GMT

can anyone tell me how to make an oval roof dome? i'v try the dome, but it always becomes a pure dome (circular)..

Re: how to make an oval dome?

Anonymous — Fri, 26 Feb 2010 21:16:47 GMT

I assume you mean elliptical (an oval is semicircles connected by straight lines).

An elliptical section can be done with the curved roof tool (not the dome) but it is better to use a profiled wall. Using the wall tool you can also make it (near) elliptical in plan with the magic wand applied to an ellipse (the magic wand will approximate with arcs).

Re: how to make an oval dome?

Dwight — Fri, 26 Feb 2010 22:50:16 GMT

Matthew: How would that look?

Re: how to make an oval dome?

Anonymous — Sat, 27 Feb 2010 01:22:05 GMT

thanks for all the advice, it sure helps a lot.. regards!

Re: how to make an oval dome?

Anonymous — Sat, 27 Feb 2010 06:37:53 GMT

Dwight wrote:
Matthew: How would that look?

Sort of like this one but it was done with meshes. I haven't tried the walls for this yet.

Re: how to make an oval dome?

Dwight — Sat, 27 Feb 2010 08:09:32 GMT

If you have a binary dome, you stretch it.....

Make a binary dome by:

1: take any dome object
2: Make a top view in 3D
3: Save the view as an object —— "Binary" option.

4: Now the saved object will stretch to become oblong, taller or flatter as you wish...

Have a look at "Object Making with Archicad" to get more insight.

Re: how to make an oval dome?

Bricklyne Clarence — Sat, 27 Feb 2010 22:26:34 GMT

Here's a try with the Complex profile tool. Since the Complex profile tool (through the magic wand and the wall tool) approximates the curvature of the ellipse from a series of connected curves at either the top or bottom of the object, it wasn't possible to get an exact recreation of the exact ellipse shape (shown by the blue curve in plan) nor to complete the top portion of the dome. The top portion would probably have to be finished with some other method like meshes, like Mathew did.

In fact the mesh method would most likely be the most accurate (but cumbersome) while the traditional Dome -> Binary object method that Dwight showed would be the easiest and most manipulatable although not as accurate in terms of getting exact elliptical shapes in plan and elevation.

But with the Mesh method - which I would opt for - you can then use the Mesh-to-Roof tool to convert the resulting dome into a series of roofs for a Complex roof ( but lots of geometry and difficult to manage), or leave it as a skin and use it as is.

Re: how to make an oval dome?

Anonymous — Sat, 27 Feb 2010 23:27:22 GMT

Bricklyne wrote:
..., or leave it as a skin and use it as is.

It's not just a skin. I dropped a second mesh and subtracted from the first to make a solid roof with thickness.

Re: how to make an oval dome?

Anonymous — Tue, 05 Feb 2013 09:58:04 GMT

Dwight wrote:
If you have a binary dome, you stretch it.....

Make a binary dome by:

1: take any dome object
2: Make a top view in 3D
3: Save the view as an object —— "Binary" option.

4: Now the saved object will stretch to become oblong, taller or flatter as you wish...

Have a look at "Object Making with Archicad" to get more insight.

Hallo Dwight, in you opinion is it possible to achieve the exact same result of what you did here with the mesh tool? I need half an ellipsoid, actually, but I think that's not the point... I then need to define the actual chape of the mesh afterwards, that's why I need my object to be a shell... I'm almost desperate.

Re: how to make an oval dome?

Dwight — Tue, 05 Feb 2013 17:28:04 GMT

Today my advice differs.
Today, create a domed shell, convert to morph and stretch as needed.

Is this further to your arch/dome issue queried elsewhere?

Re: how to make an oval dome?

Anonymous — Wed, 06 Feb 2013 16:44:43 GMT

Dwight wrote:
Today my advice differs.
Today, create a domed shell, convert to morph and stretch as needed.

Is this further to your arch/dome issue queried elsewhere?

Thanks for your answer, but I didn't get the last question. The reason why I wanted to use a mesh is that I then need to define the shape of the mesh. I cannot do that easily with a morph... moreover I cannot use morphs yet 😕

Re: how to make an oval dome?

Dwight — Thu, 07 Feb 2013 01:03:46 GMT

What kind of shape?

Re: how to make an oval dome?

Anonymous — Thu, 07 Feb 2013 16:46:24 GMT

Dwight wrote:
What kind of shape?

generally, when I ave a morph, I don't know how to define its contours. While I can define the shape of a Mesh in 2D, right? I normally do it. Like, I draw a 3D mesh, then switch to 2D, Define Shell Contour.
Also, I can define a hole in a mesh! So, if I draw a 3D mesh, then switch to a section, draw the perimeter of a hole and then select the mesh and apply the hole, I'm done with one of my problems. But can it be done with a Morph? I don't think I can draw holes in morphs freely from a section or from the floor plan, neither can I design its contours, right?

Re: how to make an oval dome?

Dwight — Thu, 07 Feb 2013 17:54:18 GMT

If you can't there is always SEO: Solid Element Operation.

Re: how to make an oval dome?

Anonymous — Thu, 07 Feb 2013 18:01:18 GMT

Dwight wrote:
If you can't there is always SEO: Solid Element Operation.

Yeah at the end I created a solid element, substracted it and moved it on an invisible layer to do the trick! Thanks.