topic Re: T-junction composite cleanup weirdness in Modeling

T-junction composite cleanup weirdness

Ignacio Azpiazu — Wed, 24 May 2023 06:28:38 GMT

Any idea what is causing this problem, how it can be solved? Layers have the same intersection priority, exterior walls have a higher junction order than the demising wall, the 'frame with insulation' material is the same everywhere, and the cleanup is still weird.

On the first picture, the left exterior wall is selected and highlighted just to make it readable in this picture. I thought the problem was related to the three-reference-line junction (which I really need), but the second picture shows the problem is still there even with a single continuous exterior wall.

The problem still happens regardless of where I put the reference line on both the exterior wall/s and the demising wall —I tried all variations.

Re: T-junction composite cleanup weirdness

insideru — Mon, 28 Aug 2017 20:01:31 GMT

i dont get what you are trying to achieve. do you want the line on the left vertical insulation or no line on the right side?

Re: T-junction composite cleanup weirdness

Ignacio Azpiazu — Mon, 28 Aug 2017 20:45:16 GMT

insideru wrote:
i dont get what you are trying to achieve. do you want the line on the left vertical insulation or no line on the right side?

I was expecting no line. I am trying to achieve consistency. Both consistent line and consistent no line would be defensible.

Re: T-junction composite cleanup weirdness

insideru — Mon, 28 Aug 2017 22:03:07 GMT

well, if it were me i would go with a line. thats because the insulation in the vertical wall is clearly another building material (may be the same product but a different width makes it a different material to me ).

but that doesn't make the whole problem go away.

here are the tests i made:

1. pretty much your setup, top wall one piece, vertical wall one piece piece
2. vertical wall has a different building material for the insulation (with a lower priority), top wall one piece, vertical wall one piece
3. same composite as on #2, but on the top there are 2 walls intersecting on the reference line. weird #*$@ happens
4. solution one: 2 different vertical walls, each with half of the composite, different building material, line separator
5. solution two: same thing, but with the same building material, no lines[/img]

Re: T-junction composite cleanup weirdness

Ignacio Azpiazu — Mon, 28 Aug 2017 22:25:07 GMT

Making two different materials for different wall types will collapse as soon as two demising walls meet on a T junction (at the opposite end of the demising wall: double wall meets double wall). Modeling a single demising wall out of two Archicad walls will not work in any other Archicad aspect than this one.

I am trying with different composites using the same materials and the problem appears only with some, and can't nail down what's triggering it.

Re: T-junction composite cleanup weirdness

insideru — Mon, 28 Aug 2017 23:44:35 GMT

Apparently archicad doesn't like those 2 insulation parts of one wall meeting up with an insulation part of another wall. I needed to fake the composite to get a somewhat clean intersection (its still not 100% clean). Here's how i did it: on the outer wall, between the insulation and the interior finish, just add a thin (2mm or even less) strip of a material with a high priority. Then make sure all the walls have the same junction priority.

This is the best i got

Re: T-junction composite cleanup weirdness

Laszlo Nagy — Tue, 29 Aug 2017 16:58:13 GMT

I think this may be a limitation in the algorithm that calculates these joints.
Interestingly, if there is no plaster on the side of the thick wall, it would join with both insulation skins properly.

I would probably model the vertical single composite Wall using 2 composite wall instances, that would work.