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Getting the properties of a node as a point in space

Tutorial 2: Traversing the Scene Graph

Tutorial 3: Adding Textures, Materials, and Animation

 

Getting the attribute type and contents of a node

Most nodes have a pointer to a scene element, e.g., a camera, light, mesh, or NURBS, which is the “contents” of the node. The data for these scene elements are stored as objects of the appropriate class, KFbxCamera, KFbxLight, etc.

These classes are called node attributes, and are subclasses of Class KFbxNodeAttribute:

Each node has an attribute type (pNode->GetNodeAttribute()), whose value is either:

• A pointer to the node attribute object of the node.
• null, i.e., there is no node attribute object for the node.

If the node attribute is not null, then you can get from the node attribute object its attribute type (enum eAttributeType).

Here is how SceneTreeView creates the string that contains the name of the node and the attribute type (two of the properties that belong to all node attributes):

KString GetNodeNameAndAttributeTypeName(const KFbxNode* pNode)

{

    KString s = pNode->GetName();

    KFbxNodeAttribute::EAttributeType lAttributeType;

    if(pNode->GetNodeAttribute() == NULL)

    {

        s += " (No node attribute type)";

    }

    else

    {

        lAttributeType = (pNode->GetNodeAttribute()->GetAttributeType());

        switch (lAttributeType)

        {

        case KFbxNodeAttribute::eMARKER:                s += " (Marker)";               break;

        case KFbxNodeAttribute::eSKELETON:              s += " (Skeleton)";             break;

        case KFbxNodeAttribute::eMESH:                  s += " (Mesh)";                 break;

        case KFbxNodeAttribute::eCAMERA:                s += " (Camera)";               break;

        case KFbxNodeAttribute::eLIGHT:                 s += " (Light)";                break;

        case KFbxNodeAttribute::eBOUNDARY:              s += " (Boundary)";             break;

        case KFbxNodeAttribute::eTRIM_NURBS_SURFACE:    s += " (Trim nurbs surface)";   break;

         ...

        }   

    }

    return s;

}

To access properties of a node attribute object that are specific to it being a camera, a NURBS, a light, etc., you can write similar code to cast the object to its appropriate class. This allows you to call all the get and set methods for that class.