Getting the transformation matrix for a node

To get the default translation, rotation, and scaling (default TRS properties) of a node, access the node’s LclTranslation, LclRotation, and LclScaling properties:

KFbxNode myNode;   // A properly initialized node object

// Get the node’s default TRS properties

fbxDouble3 myNodeLclTranslation = myNode->LclTranslation.Get();

fbxDouble3 myNodeLclRotation    = myNode->LclRotation.Get();

fbxDouble3 myNodeLclScaling     = myNode->LclScaling.Get();

All three member functions return vectors of type fbxDouble3. The value of each vector is a triplet of X, Y, and Z coordinates. The value of one of these vectors is an offset from the corresponding default TRS property vector for the parent node. A node’s default TRS properties are therefore local to the parent node.

The actual TRS properties for the node at a given point in time depend on:

The node’s default TRS properties.
The limits that apply to the node (see KFbxNode::GetLimits).
The constraints that apply to the node (see KFbxConstraint and its subclasses.
The animation curves (often called function curves or FCurves) of the current animation stack (current take). (See Animating a Scene and Animation data structures.)

You can get the node’s TRS properties in the scene’s global coordinate system expressed as a transformation matrix (often called the transform) by calling the GetNodeGlobalTransform member function of the scene’s evaluator and passing the node as a parameter (see KFbxKFbxAnimEvaluator::GetNodeGlobalTransform). This function allows you to get:

The node’s default TRS properties, returned as a transformation matrix.
The node’s actual TRS properties at a specified point in time, returned as a transformation matrix.

KFbxAnimEvaluator* mySceneEvaluator = myScene->getEvaluator();

// Get node’s default TRS properties as a transformation matrix

KFbxXMatrix& myNodeDefaultGlobalTransform =

    mySceneEvaluator->GetNodeGlobalTransform(myNode);

// Get transform containing node’s actual TRS properties at a point in time

Ktime myTime;    // Defaults to myTime=0

KFbxXMatrix& myNodeActualGlobalTransform =

    mySceneEvaluator->GetNodeGlobalTransform(myNode, myTime);

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