VR Toolbox, Inc. - QuickTime VR Glossary P-Q

Technical Support - Glossary

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palindrome looping	A type of looping, in which the frames in a view duration are played forward, then backward, then forward, and so on.
pan	To move a camera or point of view horizontally.
pan angle	The angle of pan. Pan angles are measured in radians or degrees, where positive values pan to the left.
pan constraint atom	An atom in a QuickTime VR file that contains information about the initial pan angle constraints for a panorama. Compare field-of-view constraint atom, tilt constraint atom.
panning speed	The relative speed of panning and tilting. This speed should be from 1 (the slowest speed) through 10 (the fastest speed); the default panning and tilting speed is 5.
panorama	(1) The real or synthetic expanse that is captured photographically or rendered by computer to create a panoramic node. (2) See panoramic node. panorama buffer See back buffer.
panorama data atom	See panorama sample atom.
panorama image track	A video track in a QuickTime VR movie file that contains the diced frames of the original panoramic image .
panorama-imaging atom	An atom in a QuickTime VR file that describes the default imaging characteristics for the panoramic nodes in a scene.
panorama sample atom	An atom in a QuickTime VR file that describes a single panorama, including information about the default viewing angles and the source panoramic image.
panorama track	A track that contains information about the panoramic nodes in a scene. Compare object track.
panorama view	A single set of values for the field of view, pan angle, and tilt angle for a panoramic node. Compare object view.
panoramic image	A cylindrical band of blended photographed or rendered images. Also called a panoramic PICT.
panoramic node	A type of node that allows a user to view a panorama. Compare object node.
panoramic PICT	See panoramic image.
partial panorama	A panorama that is less than 360°.
play flag	See animation setting, control setting.
play rate	The rate (and direction) at which a movie is played.
play setting	See animation setting, control setting.
prescreen buffer	An image buffer maintained by QuickTime VR for panoramic nodes that contains the corrected image. Also called the front buffer . Compare back buffer.
prescreen buffer imaging completion procedure	An application-defined procedure that is executed each time QuickTime VR is finished drawing an image into the prescreen buffer. Compare back buffer imaging procedure.
procedure selector	See intercept selector.
QTVR	See QuickTime VR.
QTVR instance	See QuickTime VR movie instance.
QTVR movie	See QuickTime VR movie.
QTVR track	A track in a QuickTime VR movie that contains a list of the nodes in the scene and other information about the scene.
QuickTime	A part of the system software for Macintosh and other computers, that an application can use, to control time-based data, such a video or audio data.
QuickTime atom	See atom .
QuickTime movie	A set of time-based data that can be displayed and manipulated using QuickTime.
QuickTime VR	An extension of the QuickTime technology, developed by Apple Computer, Inc. that allows users to interactively explore and examine photo realistic, three-dimensional virtual worlds.
QuickTime VR file format	The format of the movie files that contain QuickTime VR movies.
QuickTime VR Manager	The part of the system software for Macintosh and other computers, that an application can use to control QuickTime VR movies.
QuickTime VR movie	A collection of object and panoramic nodes.
QuickTime VR movie controller	The movie controller component that manages QuickTime VR movies. See also controller bar.
QuickTime VR movie instance	An instance of a QuickTime VR movie. Defined by the QTVRInstance data type.

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