Programming With QuickTime VR

Hot Spots

Both panoramic nodes and object nodes support arbitrarily shaped hot spots, regions in the movie image that permit user interaction. When the cursor is moved over a hot spot (and perhaps when the mouse button is also clicked), QuickTime VR changes the cursor as appropriate and performs certain actions. Which actions are performed depends on the type of the hot spot. For instance, clicking a link hot spot moves the user from one node in a scene to another.

Hot spots can be either enabled or disabled. When a hot spot is enabled, QuickTime VR changes the cursor as it moves in and out of hot spots and responds to mouse button clicks and other user actions. Your application can install callback procedures to respond to mouse actions. When a hot spot is disabled, however, it effectively doesn't exist as far as the user is concerned: QuickTime VR does not change the cursor or execute your callback procedures.

The QuickTime VR Manager provides a number of functions that you can use to manage hot spots. See "Managing Hot Spots" in the chapter "QuickTime VR Manager" for details.