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

Media Data Atom TypesVR MediaUInt32reserved2;} VRWorldHeaderAtom, *QTVRWorldHeaderAtomPtr;QTQTField descriptionsmajorVersionThe major version number of the file format.minorVersionThe minor version number of the file format.nameAtomIDThe ID of the string atom that contains the name of the scene. That atom should be a sibling of the VRworld header atom. The value of this field is 0 if no name string atom exists.defaultNodeIDThe ID of the default node (that is, the node to be displayed when the file is first opened).vrWorldFlagsA set of flags for the VR world. This field is unused.reserved1Reserved. This field must be 0.reserved2Reserved. This field must be 0.Imaging Parent AtomThe imaging parent atom is the parent atom of one or more node-specific imaging atoms. Its atom type iskQTVRImagingParentAtomType ('imgp'). Only panoramas have an imaging atom defined.Panorama-Imaging AtomA panorama-imaging atom describes the default imaging characteristics for all the panoramic nodes in a scene.This atom overrides QuickTime VR’s own defaults.The panorama-imaging atom has an atom type of kQTVRPanoImagingAtomType ('impn'). Generally, thereis one panorama-imaging atom for each imaging mode, so the atom ID, while it must be unique for each atom,is ignored. QuickTime VR iterates through all the panorama-imaging atoms.The structure of a panorama-imaging atom is defined by the QTVRPanoImagingAtom data type:2012-08-14 | © 2004, 2012 Apple Inc. All Rights Reserved.270