Dissappearing objects in sections

[Anonymous]

Does anyone know why some objects seem to dissappear in section view? I'm using structural beams which appear OK in 3D and 3D marquee but when I cut a section through the beam - it dissappears. Any ideas?

[Aussie John]

I've added a PLA file with two versions of the same object placed on the plan but rotated 180 degrees relative to each other.

View the section and one is visible in section the other isnt. Rotate the "invisible one" 180º and now it can be seen.

The object is a prism_ . The masking is set to "15" so all should be visible.
I have minimised the script for convenience.

The PLA file is a new and reset

Please let me know if anyone can see both objects

[Djordje]

Ian wrote:
It is similar to the problem with stairs where they will sometimes dissappear in marquee 3d view whilst being visible in full 3d view. The dissappearing beam objects will also dissappear in 3d if cut by a marquee but will be visible if the marquee does not cut them.

Did you try re-saving them as 9 objects? That should help; this is a known bug (part of objects not showing when in marquee).

[Aussie John]

Aussie wrote:
Please let me know if anyone can see both objects

Anyone? This is a serious problem for me as it occurs with a number of objects. I can do a workaround by rotating and mirroring but if another section looks backwards then the pronblem moves to the second section.

Djordje wrote:
Did you try re-saving them as 9 objects?

Is opening and saving all that is needed to do this as i have done that? There was a command in the special menu to do this but I dont seem to be able to get that menu to show.

[James Murray]

John,

I could not see both upon opening the section, only the one on the left. Then I rebuilt the section, and both were visible. I cut a new section, and both were visible. After that I tried rotating, mirroring, etc, no disappearance. I tried with direct reading, and saving a library. Same result. I haven't observed the behavior you described in my own work. Probably not much help. Good luck,

[Aussie John]

James wrote:
John,

I could not see both upon opening the section, only the one on the left. Then I rebuilt the section, and both were visible. I cut a new section, and both were visible. After that I tried rotating, mirroring, etc, no disappearance. I tried with direct reading, and saving a library. Same result. I haven't observed the behavior you described in my own work. Probably not much help. Good luck,

Thanks James that does help me as it says something wrong with my system rather than the object.

[Anonymous]

John,

I have been able to replicate the same behavoir as you. In other words the beam is sometimes visible and sometimes not depending on the orientation of both the beam and the section. We are both using the Austarlian verson of ArchiCad 9 - do you think this has anything to do with it?

[Aussie John]

Maybe although seems unlikely.

[Fabrizio Diodati]

Dear Aussie,

I found the reason and, from my point of view, it should be better to send a report to GS because this sounds just like a bug or… a not requested feature!
From what I see it isn’t related to the beam object but with all the ArchiCAD library parts!

Look at the attached image.
I inserted two chair and I got the same behaviour you have with your beam.

The explanation/solution is quite simple.
In both cases (beam and chair) the library part insertion point is “out” of the section/elevation range.
If you move your section/elevation limit in order to include the insertion point (BTW I’m talking about the default insertion point or probably the object origin) the chair (or the beam) will be displayed.

A simple “temporary” workaround is to avoid to rotate the object but to mirror it (look at the attached image).

Please, tell us if you will submit this report to Graphisoft otherwise I will submit it by myself…

Friendly
Fabrizio

[Fabrizio Diodati]

The second image, still about the beams...

[Fabrizio Diodati]

and just the same behaviour with two other library parts...