CreateInstanceW

Returns a handle to an on the fly created instance.
If the owlClass input is zero or not a class handle 0 will be returned,

Syntax

C++ 32 bit

C++ 64 bit

C# 32 bit

C# 64 bit

public const string enginedll = @"engine.dll";

[DllImport(enginedll, EntryPoint = "CreateInstanceW")]
public static extern Int64 CreateInstanceW(Int64 owlClass, string name);

[DllImport(enginedll, EntryPoint = "CreateInstanceW")]
public static extern Int64 CreateInstanceW(Int64 owlClass, byte[] name);

public static Int64 CreateInstanceW(Int64 owlClass)
        {
            string name = (string) null;
            return CreateInstanceW(owlClass, name);
        }

Property owlClass

Size: 64 bit / 8 byte (value)
This attribute represents a handle to the class. The term owl is comming from W3C, the classes follow the expression power of Semantic Web concepts, therefore classes support multiple inheritance. Technically classes can also be distributed over different resources, however for this the parametric library is required as an extension on the basic Geometry Kernel API.

Property name

Size: 32 bit / 4 byte (reference)
This attribute represents the name of the instance (given as wchar_t array / Unicode). The name is given by the host and the attribute is not changed.

Example (based on pure API calls)

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

using RDF;      //  include at least engine.cs within your solution

static void Main(string[] args)
{
    Int64 model = RDF.engine.CreateModel();

    if (model != 0)
    {
        //
        //  Classes
        //
        Int64   classArc3D = RDF.engine.GetClassByNameW(model, System.Text.Encoding.Unicode.GetBytes("Arc3D"));

        //
        //  Datatype Properties (attributes)
        //
        Int64   propertyRadius = RDF.engine.GetPropertyByNameW(model, System.Text.Encoding.Unicode.GetBytes("radius")),
                propertyStart = RDF.engine.GetPropertyByNameW(model, System.Text.Encoding.Unicode.GetBytes("start")),
                propertySize = RDF.engine.GetPropertyByNameW(model, System.Text.Encoding.Unicode.GetBytes("size")),
                propertySegmentationParts = RDF.engine.GetPropertyByNameW(model, System.Text.Encoding.Unicode.GetBytes("segmentationParts"));

        //
        //  Instances (creating)
        //
        Int64   myInstanceArc3D = RDF.engine.CreateInstanceW(classArc3D, (string) null);

        double  Pi = 2.0 * Math.Acos(0.0),
                radius = 2.1,
                start = 0.0,
                size = 2.0 * Pi;
        Int64   segmentationParts = 36;
        
        RDF.engine.SetDatatypeProperty(myInstanceArc3D, propertyRadius, ref radius, 1);
        RDF.engine.SetDatatypeProperty(myInstanceArc3D, propertyStart, ref start, 1);      //  in this case we could also do without, i.e. default value
        RDF.engine.SetDatatypeProperty(myInstanceArc3D, propertySize, ref size, 1);        //  in this case we could also do without, i.e. default value
        RDF.engine.SetDatatypeProperty(myInstanceArc3D, propertySegmentationParts, ref segmentationParts, 1);

        //
        //  The resulting model can be viewed in 3D-Editor.exe
        //
        RDF.engine.SaveModelW(model, System.Text.Encoding.Unicode.GetBytes("c:\\created\\myFile.bin"));
        RDF.engine.CloseModel(model);
    }
}