Returns the name of the class, if the class does not exist it returns nullptr.

This call has the same behavior as GetNameOfClass, however needs to be used in case properties are exchanged as a successive series of integers.


public const string EngineDLL = @"engine.dll";[DllImport(EngineDLL, EntryPoint = "GetNameOfClassEx")]
public static extern void GetNameOfClassEx(Int64 model, Int64 owlClass, out IntPtr name);    

Property model

Size: 64 bit / 8 byte (value)
The handle to the model. The model handle is static during its existance. Several models can be opened simultaniously within one session. Different models are always independent, threads are allowed to be running on different models simultaniously.

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: 64 bit / 8 byte (reference)
This attribute represents the name of the class (given as char array / ASCII). The name is defined in space allocated by the library, this memory will be released as soon as the model is closed, or memory release is forced by CleanMemory.


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

using Engine;

static void Main(string[] args)
    Int64 model = Engine.x86_64.CreateModel();

    if (model != 0)
        //  The following setting makes sure all class handled are in an ordered list
        //  In certain cases where several models are open or in case of conversion
        //  between formats this can be handy and / or time efficient.
        Int64   classCnt = 0;
        Engine.x86_64.OrderedHandles(model, out classCnt, (IntPtr) null, (IntPtr) null, 1, 1);

        //  Classes
        Int64   myClass = Engine.x86_64.CreateClass(model, "MyCreatedClass");

        //  Datatype Properties (attributes)
        Int64   propertyLength = Engine.x86_64.GetPropertyByName(model, "length");

        //  Instances (creating)
        Int64   myInstance = Engine.x86_64.CreateInstanceEx(model, myClass, (string) null);

        double  length = 2.0;

        Engine.x86_64.SetDatatypeProperty(myInstance, propertyLength, ref length, 1);

        System.Diagnostics.Debug.Assert(Engine.x86_64.GetVolume(myInstance, (IntPtr) 0, (IntPtr) 0) == 0.0);

        IntPtr  classNamePtrI = IntPtr.Zero;
        Engine.x86_64.GetNameOfClassEx(model, myClass, out classNamePtrI);
        string classNameI = System.Runtime.InteropServices.Marshal.PtrToStringAnsi(classNamePtrI);

        Engine.x86_64.SetNameOfClassEx(model, myClass, "OtherClassName");

        IntPtr  classNamePtrII = IntPtr.Zero;
        Engine.x86_64.GetNameOfClassEx(model, myClass, out classNamePtrII);
        string classNameII = System.Runtime.InteropServices.Marshal.PtrToStringAnsi(classNamePtrII);

        Engine.x86_64.SetClassParentEx(model, myClass, Engine.x86_64.GetClassByName(model, "Cube"), 1);

        System.Diagnostics.Debug.Assert(Engine.x86_64.GetVolume(myInstance, (IntPtr) 0, (IntPtr) 0) == 8.0);

        Engine.x86_64.SetNameOfClassEx(model, myClass, "OutOfIdeasForClassName");

        IntPtr  classNamePtrIII = IntPtr.Zero;
        Engine.x86_64.GetNameOfClassEx(model, myClass, out classNamePtrIII);
        string classNameIII = System.Runtime.InteropServices.Marshal.PtrToStringAnsi(classNamePtrIII);

        //  The retrieved class names have the following values 
        //      classNameI   :  'MyCreatedClass'
        //      classNameII  :  'OtherClassName'
        //      classNameIII :  'OutOfIdeasForClassName'

        //  The resulting model can be viewed in 3D-Editor.exe
        Engine.x86_64.SaveModel(model, "c:\\created\\myFile.bin");