topic Re: how do you model this roof? in Modeling

how do you model this roof?

Dave Brach — Tue, 23 May 2023 12:33:09 GMT

this is an L shaped one-sided hip roof. One leg of the L is narrower than the other. I made it by doing a regular hip roof then dragging the ridge over to one side on both legs. But the corners of the hip were not at 45 degrees so I started dragging nodes around to get it to look right--but this was all by eye. There's got to be a more precise way.

Re: how do you model this roof?

Richard Morrison — Sun, 15 Dec 2013 01:06:43 GMT

In a nutshell, just set the edges of the roof that are touching the house to be gables. Another approach is to pretend that the upper story isn't there, and then subtract the roof at the second story using the pet palette. Hope that's clear.

Re: how do you model this roof?

Anonymous — Sat, 21 Dec 2013 22:48:24 GMT

I came across an issue that has just popped up in 17. When creating Gable Roofs that intersect with another Gable continuing beyond the ridge of the lower roof it gets cut off at the outer edge of the upper roof in a 3D model even though the roof is extended properly under the higher portion. This is the first tile I have experienced this.

Re: how do you model this roof?

Karl Ottenstein — Sat, 21 Dec 2013 23:14:54 GMT

I'm guessing that your issue is that the Trimming Bodies are not set up properly.

See this and related Help articles:
http://helpcenter.graphisoft.com/guides/archicad-17-int-reference-guide/virtual-building/construction-elements/roofs/examples-of-multi-plane-roofs/cross-gable-roof/

Note that the trimming bodies can be edited separately from the roofs themselves.

See also:
http://helpcenter.graphisoft.com/guides/archicad-17-int-reference-guide/virtual-building/construction-elements/trim-elements-to-roof-or-shell/define-trimming-bodies/

Re: how do you model this roof?

Anonymous — Sat, 21 Dec 2013 23:16:24 GMT

I got to the Design; Connect Tool and was able to get the roof to extend under the upper roof by Clearing all connections which then changed clipped walls under the lower wall. The trimming issue will work only one way.

Re: how do you model this roof?

David Maudlin — Sun, 22 Dec 2013 13:17:33 GMT

ROBERT wrote:
I got to the Design; Connect Tool and was able to get the roof to extend under the upper roof by Clearing all connections which then changed clipped walls under the lower wall. The trimming issue will work only one way.

If the Connect command is too broad, then kill the Connect and SEO the Walls and the Roof.

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: how do you model this roof?

Anonymous — Sun, 22 Dec 2013 19:04:59 GMT

The fastest and easiest way to solve the problem was to mirror the lower roof and cut off the upper roof at the gable wall that is the only way to Connect trim the gable wall at the outer location.
Graphics oft needs to correct this problem internally.

Re: how do you model this roof?

Karl Ottenstein — Sun, 22 Dec 2013 21:22:08 GMT

ROBERT wrote:
Graphics oft needs to correct this problem internally.

You haven't provided enough information to suggest that this is an AC/Graphisoft problem vs one of not using the tools the way they were designed to be used. There haven't been many posts from folks having problems, so it is hard to tell if you've come across a unique situation that needs to be addressed or not.

If you do hope/want Graphisoft to change/improve this... then more information is needed.

Can you post images of what your exterior walls/roof are supposed to look like? (Attaching image format files is preferable to PDF. As you can see in your previous post, the PDF does not get an inline preview image.)

Re: how do you model this roof?

Anonymous — Sun, 22 Dec 2013 21:54:36 GMT

The plan has a major roof that terminates at the middle of the building. There are two opposite smaller roofs that form gables away from the main roof overhang. I have created Gable walls at the location of the exterior walla at the end of the roofs.
When I use the Connect tool to trim the Gable wall to the two roofs, the lower roof will clip itself of to line up under the upper roof overhang leaving a gap on the lower roof away from the back wall. It doesn't occur on the plan but on the 3D. If I try and undo the Clipping of the roof through the Connect tool then the gable wall will clip off at the intersection of the main and lower roof ridge line. It results as an either/or conflict.
I have also developed a Ceiling Composite which includes 1' of insulation. When I trim this to the roofs the portion under the lower roof is reduced to the width of the vacant area under the upper roof overhang. If i don't include the lower roof in the clipping then the ceiling sticks out of the lower roof. There is no way of correcting this issue, Trying the SEO tool doesn't do anything either.

Re: how do you model this roof?

Karl Ottenstein — Mon, 23 Dec 2013 00:35:13 GMT

Same picture/PDF as before and too many words for me to study this for free. Can you just show a sketch/picture of the final result that you are trying to accomplish (views that show all of building) - or did accomplish with your workaround?

Re: how do you model this roof?

Anonymous — Mon, 23 Dec 2013 02:07:23 GMT

That' sway I emailed my friends at Graphisoft with the entire plan so they can firpgure out what the problem is.