Extract wall composite name with API (AC26)

[YourQS]

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.

 

 

[Joel Buehler · Accepted solution]

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

[YourQS]

Thanks very much

[Apollos]

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);

[YourQS]

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.

[Apollos]

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.