topic Re: Hollow objects in Modeling

Hollow objects

Anonymous — Tue, 23 May 2023 14:32:27 GMT

Hi, I'm a new user of archicad, so please excuse me if i ask silly questions.
Could someone please tell me how to make the ellipsoid object (from basic shapes) hollow. Could I somehow cut another ellipsoid out of it?

Re: Hollow objects

Dwight — Fri, 08 Feb 2013 17:33:59 GMT

Using a Solid Element Operation [SEO], a smaller ellipsoid can subtract the innards of the larger one. I made the smaller one with an equal reduction of all axes.

Re: Hollow objects

Laszlo Nagy — Fri, 08 Feb 2013 18:56:49 GMT

Or you could revolve an Ellipse shape with the Shell Tool, which will create the Ellipsoid body with the specified shell thickness.
The advantage of this method is that the thickness of the body will be constant at all points of the body.

Re: Hollow objects

Anonymous — Fri, 08 Feb 2013 19:56:16 GMT

Thank you so much for replying!

Dwight, so I created two ellipsoids, one within another, then went to design - Solid Element Operation, it the SEO box - do I chose 'get target element' and then select bigger shape? Then 'get operator element' and select a smaller shape? Subtraction and Execute? Is it correct?

Re: Hollow objects

Dwight — Fri, 08 Feb 2013 20:00:16 GMT

Sounds Good.
But why write when it takes less time to actually try it out?
That's why they made "undo."

Be courageous.

SEO is very useful - see the reference manual.

Re: Hollow objects

Anonymous — Fri, 08 Feb 2013 20:01:20 GMT

laszlonagy, thank you too for your advice. I tried shell tool but I couldn't figure out how to create an ellipse with it and could not find any tutorials about hollow spheres. Could you recommend any, I'd be grateful.

Re: Hollow objects

Anonymous — Fri, 08 Feb 2013 20:04:56 GMT

Dwight, I've done it. But don't know if it worked

Could you please advise me on how to make an opening in it?

Re: Hollow objects

Dwight — Fri, 08 Feb 2013 20:10:35 GMT

Use your marquee to cut into the object in 3D view.

Re: Hollow objects

Anonymous — Fri, 08 Feb 2013 20:36:23 GMT

I'm really sorry to bother you, but do you mind explaining how to use marquee tool to make an opening?

Can I also show the shape I'm working on, may be it will be easier to understand what I'm trying to do?

I'd like to add opening to the bottom one and openings where the ellipsoids intersect.

Re: Hollow objects

Dwight — Fri, 08 Feb 2013 20:45:47 GMT

Marquee tool only lets you look inside - it doesn't cut holes.

Use other elements to cut openings with SEO. Like a slab or wall shape.

To make a hole between overlapping items, i'm not sure but you might do a double reverse SEO subtraction: A>B, then B>A.

Re: Hollow objects

Dwight — Fri, 08 Feb 2013 20:46:16 GMT

What are you making?

Re: Hollow objects

Anonymous — Fri, 08 Feb 2013 21:30:06 GMT

Thanks so much for your help and time! I'll follow your advises and will keep trying.
It's a pavilion project, so it's a building. Or perhaps I should say hopefully it's going to be a building at some point )) So what I'm trying to do at the moment - make an opening in the bottom one as an entrance, then openings in ellipsoids intersections and create staircases to connect them.

Re: Hollow objects

Laszlo Nagy — Fri, 08 Feb 2013 21:48:33 GMT

This video shows how to create an ellipsoid using the Shell Tool.
The part you are interested in starts at 1:45

https://www.youtube.com/watch?v=m_O_BIy5YzI&list=PL1CA38C58B1DCFE58&index=36

Re: Hollow objects

Dwight — Fri, 08 Feb 2013 23:26:46 GMT

A beginner won't have any trouble making that.

Re: Hollow objects

Anonymous — Sat, 09 Feb 2013 12:53:20 GMT

laszlonagy wrote:
This video shows how to create an ellipsoid using the Shell Tool.
The part you are interested in starts at 1:45

https://www.youtube.com/watch?v=m_O_BIy5YzI&list=PL1CA38C58B1DCFE58&index=36

Amazing! Thank you so much!