SetClassParent

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 adds parentOwlClass as immediate parent of owlClass if and only if parentOwlClass is not an
ancestor of owlClass and owlClass is not an ancestor of parentOwlClass.

Returns owlClass if this call made any change to the parent class relation of owlClass.

It will return 0 in case:
owlClass and/or parentOwlClass are 0
owlClass equals parentOwlClass
parentOwlClass is already (indirectly) a parent of owlClass
owlClass is (indirectly) a parent of parentOwlClass

It will return owlClass in case:
parentOwlClass became a direct parent of owlClass and they were not related this manner before

Syntax

C++ 32 bit

C++ 64 bit

C# 32 bit

C# 64 bit

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


//
//   Weak typing definition
//
int64_t __declspec(dllexport) __stdcall SetClassParent(
                                                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 SetClassParent 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);
    }
}