Creating and positioning the camera’s target

Animating a Scene > Working with a camera >

CubeCreator points its camera, not at a specific cube, but at a marker in the scene. Markers are normally not visible, i.e., they are not rendered. In this case, the purpose of the marker is to be a target (sometimes called a point of interest) of the camera.

Creating a marker is very similar to creating a camera:

KFbxMarker* myMarker = KFbxMarker::Create(myScene, "");

KFbxNode* myMarkerNode = KFbxNode::Create(myScene, "");

myMarkerNode->SetNodeAttribute(myMarker);

myRootNode->AddChild(myMarkerNode);

Here we set the marker’s translation, rotation, and scaling (the TRS properties):

// The marker is positioned above the origin.

// There is no rotation

// and no scaling.

myMarkerNode->LclTranslation.Set (KFbxVector4(0.0, 40.0, 0.0));

myMarkerNode->LclRotation.Set (KFbxVector4(0.0, 0.0, 0.0));

myMarkerNode->LclScaling.Set (KFbxVector4(1.0, 1.0, 1.0));

LclTranslation.Set() sets the default position of a node, in this case, the node for the marker. Note that:

This position is relative to the parent node (except for the scene’s root node, which has no parent node).
This position is only the node’s default position: it may be overridden by any animation that is applied to the node, by any limits to the position of the node, and by any constraints that apply to the position of the node.

Similarly, the rotation and scaling of a node are also defaults and are also relative to the parent node.