Get Materials of Multi-layer components from current selected Wall

[mcbabo]

I want to extract the materials of a wall I have currently selected

I only know that I get the selected elements with this code (i guess)

GS::Array<API_Neig> walls;

GSErrCode err = ACAPI_Selection_Get(nullptr, &walls, false, true, API_InsidePartially);

[kuvbur]

	API_Element					element = {};
	API_ModelElemStructureType	structtype = {};
	API_AttributeIndex			constrinx = {};
	double						fillThick = 0;
	BNZeroMemory(&element, sizeof(API_Element));
	element.header.guid = elemGuid;
	err = ACAPI_Element_Get(&element);
	if (err != NoError) {return err;}
structtype = element.wall.modelElemStructureType;
		if (structtype == API_CompositeStructure) constrinx = element.wall.composite;
		if (structtype == API_BasicStructure) constrinx = element.wall.buildingMaterial;
		fillThick = element.wall.thickness;
API_Attribute						attrib;
		API_AttributeDef					defs;
		BNZeroMemory(&attrib, sizeof(API_Attribute));
		BNZeroMemory(&defs, sizeof(API_AttributeDef));
		attrib.header.typeID = API_CompWallID;
		attrib.header.index = constrinx;
		err = ACAPI_Attribute_Get(&attrib);
		if (err != NoError) {return err;}
		err = ACAPI_Attribute_GetDef(attrib.header.typeID, attrib.header.index, &defs);
		if (err != NoError) {return err;}
		for (short i = 0; i < attrib.compWall.nComps; i++) {
			/// you code for (*defs.cwall_compItems)[i].buildingMaterial, (*defs.cwall_compItems)[i].fillThick
		}
		ACAPI_DisposeAttrDefsHdls(&defs);

[mcbabo]

Thanks for your code, but could you please explain the functions of every line. I am very new to the API, so I don't understand all of it.