Show in Contents

Add to Favorites

Home: Autodesk FBX SDK Progammer's Guide

 

Creating a camera

Working with a camera

Pointing a camera at a target

 

Animating a Scene > Working with a camera > 

Creating and positioning the camera’s target

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* lMarker = KFbxMarker::Create(pSdkManager, "");

KFbxNode* lMarkerNode = KFbxNode::Create(pSdkManager, "");

lMarkerNode->SetNodeAttribute(lMarker);

lRootNode->AddChild(lMarkerNode);

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.

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

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

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

LclTranslation.Set() sets the default position of a node, in this case, 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 is a default position: it may be overridden by any animation that is applied to the node, or by any limits 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.