Instance Header API Calls
File IO API Calls
Schema Reading API Calls
Instance Reading API Calls
Instance Writing API Calls
Controling API Calls
Uncategorized API Calls
Geometry Kernel related API Calls
Deprecated API Calls (GENERIC)
Validation
Deprecated API Calls (GEOMETRY)

sdaiCreateAggr

This call creates an aggregation. The instance has to be present, the attribute argument can be empty (0) in case the aggregation is an nested aggregation for this specific instance, preferred use would be use of sdaiCreateNestedAggr in such a case.

Syntax

C++ 32 bit
C++ 64 bit
C# 32 bit
C# 64 bit
public const string enginedll = @"engine.dll";

[DllImport(enginedll, EntryPoint = "sdaiCreateAggr")]
public static extern Int32 x86_sdaiCreateAggr(Int32 instance, Int32 attribute);

[DllImport(enginedll, EntryPoint = "sdaiCreateAggr")]
public static extern Int32 x64_sdaiCreateAggr(Int64 instance, Int64 attribute);

public static Int32 sdaiCreateAggr(Int64 instance, Int64 attribute)
		{
			if (IntPtr.Size == 4)
			{
				var _result = x86_sdaiCreateAggr((Int32)instance, (Int32)attribute);
				return _result;
			}
			else
			{
				return x64_sdaiCreateAggr(instance, attribute);
			}
		}

Property instance

Size: 32 bit / 4 byte (value)
...

Property attribute

Size: 32 bit / 4 byte (reference)
...

Example (based on pure API calls)

Here you can find code snippits that show how the API call sdaiCreateAggr can be used.

C++ 32 bit
C++ 64 bit
C# 32 bit
C# 64 bit
using RDF;      //  include at least engine.cs within your solution

Int64 localCreateAggrBN(Int64 instance, string attributeName)
{
    //
    //  This function is an alternative to the API call sdaiCreateAggrBN()
    //  based on sdaiCreateAggr().
    //
    //  Use of sdaiCreateAggr() can lead to performance improvement compared to sdaiCreateAggrBN().
    //
    Int64 instanceType = ifcengine.sdaiGetInstanceType(instance),
          attribute = ifcengine.sdaiGetAttrDefinition(instanceType, attributeName);

    return ifcengine.sdaiCreateAggr(instance, attribute);
}