Quicktime File Format (2012-08-14).pdf

Media Data Atom TypesQuickTime VR File FormatkQTEventFrameLoaded ('fram')A wired action that is generated when a node is entered, before any application-installed entering-nodeprocedure is called (this event processing is considered part of the node setup that occurs before theapplication’s routine is called).kQTEventIdle ('idle')A wired action that is generated every n ticks, where n is defined by the contents of thekSpriteTrackPropertyQTIdleEventsFrequency atom (SInt32) in the media property atomcontainer. When appropriate, this event is triggered before any normal idle processing occurs for theQuickTime VR movie.kQTEventMouseClick ('clik')A wired action that is generated when the mouse goes down over a hot spot.kQTEventMouseClickEnd ('cend')A wired action that is generated when the mouse goes up after a kQTEventMouseClick is generated,regardless of whether the mouse is still over the hot spot originally clicked. This event occurs prior toQuickTime VR’s normal mouse-up processing.kQTEventMouseClickEndTriggerButton ('trig')A wired action that is generated when a click end triggers a hot spot (using the same criterion as usedby QuickTime VR in 2.1 for link/url hot spot execution). This event occurs prior to QuickTime VR’s normalhot spot–trigger processing.kQTEventMouseEnter ('entr'), kQTEventMouseExit('exit')Wired action that are generated when the mouse rolls into or out of a hot spot, respectively. These eventsoccur whether or not the mouse is down and whether or not the movie is being panned. These eventsoccur after any application-installed MouseOverHotSpotProc is called, and will be cancelled if the returnvalue from the application’s routine indicates that QuickTimeVR’s normal over–hot spot processing shouldnot take place.QuickTime VR File FormatNote VR Media is deprecated in the QuickTime file format. The information that follows is intendedto document existing content containing VR Media and should not be used for new development.A QuickTime VR movie is stored on disk in a format known as the QuickTime VR file format. Beginning inQuickTime VR 2.0, a QuickTime VR movie could contain one or more nodes. Each node is either a panoramaor an object. In addition, a QuickTime VR movie could contain various types of hot spots, including links betweenany two types of nodes.2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.284