topic Re: Extract wall composite name with API (AC26) in Archicad C++ API

Extract wall composite name with API (AC26)

YourQS — Tue, 17 Sep 2024 11:16:18 GMT

I would like to extract the composite name from walls, slabs, and roofs using the API. I have got all the other information I need (dimensions, instance name, etc) but I am struggling to find where to get composite info. I have attached 2 screenshots showing what I need to get.

Could someone point me to where this value is held?

Thanks in advance.

Re: Extract wall composite name with API (AC26)

Joel Buehler — Fri, 22 Sep 2023 09:28:38 GMT

The Composite is in element specific structs

here is a example of the wall:

https://archicadapi.graphisoft.com/documentation/api_walltype?s=API_WallType

you get the Attribute Index and with ACAPI_Attribute_Get you should be able to mangle to the name of the composite

Re: Extract wall composite name with API (AC26)

YourQS — Sun, 24 Sep 2023 18:44:37 GMT

Thanks very much

Re: Extract wall composite name with API (AC26)

Apollos — Thu, 11 Jan 2024 10:24:08 GMT

Happy New year @YourQS and @Joel Buehler .

Please I need help. I am new to App Development using Archicad C++ API. I am trying to extract some basic information from the AC Database and specific Elements.

Please, I have tried to extract some Building Material Attribute information, particularly the ID, Manufacturer, and Description, but my code always returns empty. Please, I need help. I've attached the information I need and the snippet of the line of code I have been using.

API_Attribute attrib = {}; GSErrCode err; BNZeroMemory(&attrib, sizeof(API_Attribute)); attrib.header.typeID = API_BuildingMaterialID; attrib.header.index = 4; err = ACAPI_Attribute_Get(&attrib); if (err == NoError) { /*Extracting GS::UniString values*/ const GS::UniString theGuid = APIGuid2GSGuid(attrib.buildingMaterial.head.guid).ToUniString().ToCStr().Get(); const GS::UniString idString = attrib.buildingMaterial.id ? GS::UniString(*attrib.buildingMaterial.id).ToCStr().Get() : GS::UniString(); const GS::UniString manufacturerString = attrib.buildingMaterial.manufacturer ? GS::UniString(*attrib.buildingMaterial.manufacturer).ToCStr().Get() : GS::UniString(); const GS::UniString descriptionString = attrib.buildingMaterial.description ? GS::UniString(*attrib.buildingMaterial.description).ToCStr().Get() : GS::UniString(); /*Displaying extracted values*/ ACAPI_WriteReport("Building Material Information:\nGuid: " + theGuid + "\nID: " + idString + "\nManufacturer: " + manufacturerString + "\nDescription: " + descriptionString, true);

Re: Extract wall composite name with API (AC26)

YourQS — Thu, 11 Jan 2024 20:56:39 GMT

Hi Appolos,

Where do you get the index from in the line

attrib.header.index = 4

Magic numbers like this are generally frowned upon, because others don't know what they mean.

Re: Extract wall composite name with API (AC26)

Apollos — Mon, 15 Jan 2024 00:55:19 GMT

Hello @YourQS thank you for your response.

Pardon me for not adding comments to the line of code. NOTE: As I mentioned earlier I am new to using the Archicad C++ API.

The "attrib.header.index" specifies the index value of the attribute. I observed that in the Attribute Manager documentation (see the picture).

I wanted to extract the attributes of all the Building Materials within the Archicad Database (as is) therefore I thought iterating through the index was the best way.

I got results (e.g. Guid, name, connPriority, cutFill, cutFillBackgroung, etc) but I could not access the ID and manufacturer.

If you have a better suggestion and advice I await your response.