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

Media Data Atom TypesObject TracksdefaultTiltThe default tilt angle, in degrees. This is the tilt angle used when the object is first displayed. The valueof this field must be greater than or equal to the value of the minTilt field and less than or equal to thevalue of the maxTilt field.minFieldOfViewThe minimum field of view to which the object can zoom. The valid range for this field is from 1 to thevalue of the fieldOfView field. The value of this field must be positive.fieldOfViewThe image field of view, in degrees, for the entire object. The value in this field must be greater than orequal to the value of the minFieldOfView field.defaultFieldOfViewThe default field of view for the object. This is the field of view used when the object is first displayed.The value in this field must be greater than or equal to the value of the minFieldOfView field and lessthan or equal to the value of the fieldOfView field.defaultViewCenterHThe default horizontal view center.defaultViewCenterVThe default vertical view center.viewRateThe view rate (that is, the positive or negative rate at which the view animation in the object plays, ifview animation is enabled). The value of this field must be from –100.0 through +100.0, inclusive.frameRateThe frame rate (that is, the positive or negative rate at which the frame animation in a view plays, if frameanimation is enabled). The value of this field must be from –100.0 through +100.0, inclusive.animationSettingsA set of 32-bit flags that encode information about the animation settings of the object.controlSettingsA set of 32-bit flags that encode information about the control settings of the object.The movieType field of the object sample atom structure specifies an object controller type, that is, the userinterface to be used to manipulate the object.QuickTime VR supports the following controller types:enum ObjectUITypes {kGrabberScrollerUI = 1,kOldJoyStickUI = 2,2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.305