Programming With QuickTime VR 2.1
A QuickTime VR scene is a set of one or more nodes. A node is a position in a virtual world at which an object or panorama can be viewed. For a panoramic node, the position of the node is the point from which the panorama is viewed. QuickTime VR scenes can contain any number of nodes, which can be either object or panoramic nodes.
A node in a QuickTime VR movie is identified by a unique node ID, a long integer that is assigned to the node at the time a VR movie is created (and that is stored in the movie file).
When a QuickTime VR movie contains more than one node, the user can move from one node to another if the author of the QuickTime VR movie has provided a link (or connection) between the source and destination nodes. A link between nodes is depicted graphically by a link hot spot, a type of hot spot that, when clicked, moves the user from one node in a scene to another node.
It's also possible to move from node to node programmatically, using the QuickTime VR Manager, even between nodes that were not explicitly linked by the movie's author.