Programming with QuickTime VR

Area of Interest Structure

The areasOfInterest parameter to the QTVRSetBackBufferImagingProc function (link) specifies an array of area of interest structures, each one of which indicates a rectangular area in the back buffer. An area of interest structure is defined by the QTVRAreaOfInterest data type:



 
struct QTVRAreaOfInterest {

    float                       panAngle;

    float                       tiltAngle;

    float                       width;

    float                       height;

    UInt32                      flags;

};

typedef struct QTVRAreaOfInterest QTVRAreaOfInterest;

panAngle: The pan angle of the upper-left coordinate (in panorama space) of the area of interest.
tiltAngle: The tilt angle of the upper-left coordinate (in panorama space) of the area of interest.
width: The width of the area of interest.
height: The height of the area of interest.
flags: A set of bit flags that indicate when to call the back buffer imaging procedure for this area of interest. See "Back Buffer Imaging Procedure Flags" for a description of the available flags.