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Getting a node’s properties as a point in space

Tutorial 2: Traversing the scene graph

Tutorial 3: Adding Textures, Materials, and Animation

 

FBX SDK Programmers Guide > Tutorial 2: Traversing the scene graph > 

Getting a node’s attribute type and contents

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 a attribute type (pNode->GetNodeAttribute()), whose value is either:

• A pointer to the node’s “node attribute” object.
• null, i.e., there is no node attribute object for this node.

If the node attribute is notnull, 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::eTRIM_NURBS_SURFACE:

 s += " (Trim nurbs surface)";

 break;

 case KFbxNodeAttribute::eUNIDENTIFIED:

 s += " (Unidentified)";

 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.