topic Re: Objects created with custom profiles are faceted in Modeling

Objects created with custom profiles are faceted

Anonymous — Tue, 23 May 2023 14:23:41 GMT

I've created a custom profile that includes a circular hole and filleted corners, and assigned it to a column. For some reason, what are supposed to be curved sections of the column are faceted--that is, reduced into a series of straight-line segments (see attached photo). The really troublesome bit is that this doesn't seem to be a display shortcut as is often the case in 3D programs--rather, each of these facets can be snapped to, and when viewing the column in plan I can't dimension the radii of the curved bits.

I'm wondering if anyone knows how I might fix this. The problem doesn't seem unique to the profile I created, which suggests that it might be some kind of global setting I need to adjust...

Re: Objects created with custom profiles are faceted

rgarand — Wed, 26 Nov 2014 17:05:38 GMT

Did you draw the profile with polylines or circles/arcs? Mine seems to be coming out just fine.

Re: Objects created with custom profiles are faceted

Anonymous — Wed, 26 Nov 2014 17:22:47 GMT

Yep, profile is drawn with a circle and fillets generated using the fillet tool. Screen shot of profile is attached.

Re: Objects created with custom profiles are faceted

rgarand — Wed, 26 Nov 2014 17:48:01 GMT

The only other thing I can think of is if you used your magic wand to create the fill and how those settings are set up. If those settings are too high and you have the tracing method set to Linear Segments you may generate a fill like your first screenshot...but you would see this fill with it's segments.

It is interesting to hear you can actually snap to the intersections of the segments...this tells me the fill in the original profile has segments.

Maybe redraw the profile.

Re: Objects created with custom profiles are faceted

Anonymous — Wed, 26 Nov 2014 21:09:25 GMT

I did indeed create the fill with the magic wand tool, but I double-checked the fill and it appears to be correct (i.e. composed of curved segments where appropriate).

I also created a brand new custom profile and had the same problem. I've noticed that the problem additionally exists with profiles I didn't create (e.g. steel sections).

I am however able to draw, say, a slab or roof that is curved in plan and have it behave as one would expect.

This seems to suggest that the problem has something to do with the way in which the profile manager is converting profiles into objects...

Re: Objects created with custom profiles are faceted

David Maudlin — Thu, 27 Nov 2014 14:17:52 GMT

jkjenner:

Custom Profiles do get segmented in the model, see: Custom Profile, this is evident in small items. An alternative is to use the Slab Tool to create this piece, it will have better curve resolution.

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: Objects created with custom profiles are faceted

Anonymous — Mon, 01 Dec 2014 16:38:06 GMT

Thanks for the heads up--now that I know that, I won't waste any more time trying to figure out how to make it work!

I am mildly shocked that the program operates this way by design--I've used probably a dozen CAD or 3D programs of various types and never come across anything like this. Every program imposes some sort of geometric simplification to facilitate rendering but these programs always preserve the underlying geometry for practical purposes. It seems crazy to me that ArchiCAD will actually let you *dimension* the arbitrary graphic simplifications it makes, and prevent you from dimensioning what it is you actually drew...