UnsetClassParent

Defines a parent class relation of a given class. Multiple-inheritance is supported and behavior
of parent classes is also inherited as well as cardinality restrictions on datatype properties and
object properties (relations).

It removes parentOwlClass as immediate parents of owlClass if result is consistent.

It will return 0 in case:
owlClass and/or parentOwlClass are 0
owlClass equals parentOwlClass
parentOwlClass was not a direct parent of owlClass (could be as another parent class of owlClass has parentOwlClass as parent)

It will return owlClass in case:
parentOwlClass was a direct parent of owlClass and is now removed

Syntax

C++ 32 bit

C++ 64 bit

C# 32 bit

C# 64 bit

//
//   Strong typing definition
//
OwlClass        UnsetClassParent(
                        OwlClass                owlClass,
                        OwlClass                parentOwlClass
                    );


//
//   Weak typing definition
//
int64_t __declspec(dllexport) __stdcall UnsetClassParent(
                                                int64_t                 owlClass,
                                                int64_t                 parentOwlClass
                                            );

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 parentOwlClass

Size: 64 bit / 8 byte (value)
This attribute represents a handle to the parent class.

Example (based on pure API calls)

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

#include    "./include/engine.h"

void    main()
{
    int64_t model = CreateModel();

    if (model) {
        //
        //  The following class will be created on-the-fly if the name is not used already
        //  for a class or property (attribute / relation).
        //
        //  note: calling GetClassByName with a name not yet existing will do the same trick)
        //
        int64_t classMyOwnCylinderClass = CreateClass(model, "MyOwnCylinderClass");

        //
        //  Classes
        //
        int64_t classCylinder = GetClassByName(model, "Cylinder");

        //
        //  Datatype Properties (attributes)
        //
        int64_t propertyLength = GetPropertyByName(model, "length"),
                propertyRadius = GetPropertyByName(model, "radius"),
                propertySegmentationParts = GetPropertyByName(model, "segmentationParts");

        //
        //  Instances
        //
        int64_t instanceMyOwnCylinderClass = CreateInstance(classMyOwnCylinderClass, nullptr);

        //
        //  At this moment our new class is unrelated to other classes and instances of it not generating any geometry
        //
        assert(GetGeometryClass(classMyOwnCylinderClass) == 0);

        SetClassParent(classMyOwnCylinderClass, classCylinder, 1);

        //
        //  Now each instance of MyOwnCylinderClass is inheriting the behavior and knowledge of a Cylinder
        //
        assert(GetGeometryClass(classMyOwnCylinderClass) == classCylinder);

        double  length = 1.8,
                radius = 1.3;
        int64_t segmentationParts = 36;
        
        SetDatatypeProperty(instanceMyOwnCylinderClass, propertyLength, &length, 1);
        SetDatatypeProperty(instanceMyOwnCylinderClass, propertyRadius, &radius, 1);
        SetDatatypeProperty(instanceMyOwnCylinderClass, propertySegmentationParts, &segmentationParts, 1);

        double  volume = GetVolume(instanceMyOwnCylinderClass, nullptr, nullptr);

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