Programming with QuickTime VR

Specifying a Movie Controller

When you create a QuickTime VR movie, you need to add a special piece of user data that identifies which movie controller to invoke for this movie. The movie controller type for QuickTime VR 2.0 movies is 'qtvr' . This user data is examined by the Movie Toolbox when an application calls the NewMovieController function for that movie. Listing 4-1 shows how to add the appropriate user data to a new movie.

Listing 1 Specifying the QuickTime VR movie controller



 
UserData            myUserData;

OSType              controllerSubType = FOUR_CHAR_CODE('qtvr';



myUserData = GetMovieUserData(theMovie);

SetUserDataItem(myUserData, &controllerSubType, 

    sizeof(controllerSubType), kQTControllerType, kQTControllerID);

The constants kQTControllerType and kQTControllerID are defined by QuickTime VR:



 
enum {

    kQTControllerType                           = FOUR_CHAR_CODE('ctyp').

    kQTControllerID                             = 1

};