topic Re: Arched cut-out in Modeling

Arched cut-out

Anonymous — Wed, 24 May 2023 06:41:27 GMT

Hello,
I am trying to re-create what we once modeled in Microstation now in Archicad. My only question (and i've been trying to do this for awhile now) is how can i make an arch here (first picture) to reflect this model? (second picture) I have tried downloaded "empty arch openings" but they're always the same size and height and I cannot edit them. I could do a simple SEO but i don't know how to create a wall + curved top to use to"subtract" in the SEO.

Any ideas? I know there is a simple way to do it, creating an arch in a rudimentry task, but i'm not sure how to in ARCHICAD and searching has not led me to anything.
Thanks

Re: Arched cut-out

Anonymous — Mon, 28 Mar 2016 19:01:07 GMT

Here is the second picture, what we have modeled in microstation

Re: Arched cut-out

Anonymous — Mon, 28 Mar 2016 20:17:44 GMT

I would create a glass material slab in the shape/thickness of the arch that you want, convert it to a morph, and rotate it upright 90 degrees and proceed with the SEO operation you were referring to.

Re: Arched cut-out

David Maudlin — Tue, 29 Mar 2016 12:29:57 GMT

Isaac:

Assuming that the element you need to place the arch in is a Wall: use the Arch Top Door Opening 19 Door (in the Openings 19 folder in the Object Library 19). Set both the door height and Opening Arch Height to be the same (so there is only arch, no vertical sides).

You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.

David

Re: Arched cut-out

Anonymous — Tue, 29 Mar 2016 12:35:08 GMT

Hello Isaac,

I think the best way to do that is placing Arch Top Window Opening from windows list. Just set shoulder height to 0, set same value to Window Height and Opening Arc Height and set the width as you need. You can also increase Curve Resolution for more smooth arc.

Re: Arched cut-out

Anonymous — Tue, 29 Mar 2016 13:29:50 GMT

I don't like the way the door/window openings look myself so I would use an SEO so you get an smooth looking arch and not a segmented arch. I would use a shell, curve it to the arch you want, and then do and SEO subtraction with downward extrusion.

I might also do a complex profile SEO. Just go to that elevation, draw the arch in lines how you want it, cut and paste into a complex profile, extrude, place the profile and do the SEO. What's nice about this way of doing this is you can swap out complex profiles on the fly and it makes it easy to show it this way or that way with profile management.

Re: Arched cut-out

Anonymous — Tue, 29 Mar 2016 15:51:09 GMT

mbeam wrote:
I don't like the way the door/window openings look myself so I would use an SEO so you get an smooth looking arch and not a segmented arch. I would use a shell, curve it to the arch you want, and then do and SEO subtraction with downward extrusion.

I might also do a complex profile SEO. Just go to that elevation, draw the arch in lines how you want it, cut and paste into a complex profile, extrude, place the profile and do the SEO. What's nice about this way of doing this is you can swap out complex profiles on the fly and it makes it easy to show it this way or that way with profile management.

You can increase window resolution for smoothness.
I prefer window because I avoid placing additional elements and apply SEO, if library elements are enough. The project become heavier with any additional morph, I guess.

In case of complex profile the circular parts have small resolution and you cannot increase it.

Re: Arched cut-out

Anonymous — Tue, 29 Mar 2016 16:32:31 GMT

Rammstein wrote:
You can increase window resolution for smoothness.

How do you increase the resolution?

Re: Arched cut-out

David Maudlin — Wed, 30 Mar 2016 12:40:45 GMT

mbeam wrote:
Rammstein wrote:
You can increase window resolution for smoothness.
How do you increase the resolution?

Window Settings > Opening Settings > Window Opening... > Curve Resolution (similar setting for Door also).

David