topic Re: Return layers of walls in Archicad C++ API

Return skins of walls

Emkave — Fri, 28 Feb 2025 11:06:12 GMT

Good day everyone, I have a problem with returning a data about the skins of a wall in Archicad.

I have checked these links but they didn't give me much of information:
https://community.graphisoft.com/t5/Modeling/Wall-composite-construction-layers-Different-methods-different/td-p/287981

https://community.graphisoft.com/t5/Archicad-C-API/How-to-get-wall-materials-and-thicknesses-using-API/td-p/172965

I wonder if there is a pseudo code of how the information about the skins of the wall could be extracted. I am a bit unsure of how the attributes and data are stored at backed of Archicad, soooo... yeah.

Any help will be appreciated!

Re: Return layers of walls

Barry Kelly — Fri, 28 Feb 2025 00:12:45 GMT

Every wall only has one 'layer' that it belongs to.

I am assuming you are wanting information on the wall 'skins'?

If so, let me know and I will edit your post - or you can edit it yourself (3 dots to the top right of post).

Barry.

Re: Return layers of walls

Emkave — Fri, 28 Feb 2025 11:06:44 GMT

Hi. Sorry for the confusion.

For example I have these, what I thought to be, the wall "layers".

I want to find a way to return them via the API if possible

Re: Return layers of walls

Barry Kelly — Fri, 28 Feb 2025 11:08:26 GMT

Layers are what you place the elements in when you model.

Composites are made up of skins.

Barry.

Re: Return skins of walls

Laszlo Nagy — Fri, 28 Feb 2025 14:26:21 GMT

Archicad Composite Structure Skin = Revit Compound Structure Layer. There are some others like Archicad Layout = Revit Sheet, Archicad Label = Revit Tag, or Archicad Zone = Revit Room, there are probably more.

Re: Return layers of walls

Emkave — Sun, 02 Mar 2025 15:51:04 GMT

Yes, I see it. But how can I return data about those skins and structures?

Re: Return layers of walls

Barry Kelly — Tue, 04 Mar 2025 02:02:00 GMT

I am afraid I have no idea, as I have never delved into the API side of things.

I am just trying to clarify the correct terminology so someone else can hopefully help you.

Barry.

Re: Return skins of walls

Hiromichi Shinkawa — Tue, 04 Mar 2025 04:53:55 GMT

Hi, You can get composite structure by using ACAPI_Attribute_GetDefExt() command. For the skin data, please check the API_CWallComponent structure. Also, You can find find the related sample code in API Examples (Attribute_Test.cpp).

HTH.

Re: Return skins of walls

Emkave — Wed, 05 Mar 2025 10:45:50 GMT

Thank you for the answer. Is there actually a way to find out of how many skins are applied to a wall?

Re: Return skins of walls

Hiromichi Shinkawa — Thu, 06 Mar 2025 05:30:42 GMT

Yes, getting the wall composite index at first, then get the composite definition, the number of cwall_compItems should be the skin's number applied to that wall.

HTH.

Re: Return skins of walls

Emkave — Thu, 06 Mar 2025 10:10:52 GMT

Thank you very much for the hints. I also wonder if there is somewhere an array of names of those skins that I could also return.

Thank you again!

Re: Return skins of walls

Hiromichi Shinkawa — Tue, 11 Mar 2025 00:27:11 GMT

You can get the index of each skin's building material from API_CWallComponent data, then call ACAPI_Attribute_Get() function to have the name of building material using the index.

HTH.