VR Toolbox, Inc. - QuickTime VR Glossary E-G

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enviromapping	The process of projecting an image onto the inside of a shape, such as a sphere or cylinder.
field of view	The horizontal or vertical angular expanse, visible through a camera.
field-of-view constraint atom	An atom in a QuickTime VR file that contains information about the initial vertical field of view constraints for a panorama. Compare pan constraint atom, tilt constraint atom.
floating-point point structure	A data structure used to specify a point in a panorama or object. Defined by the FloatPoint data type.
focal length	The distance from a lens to the focal point of the image projected by the lens. Usually expressed in millimeters, smaller focal lengths result in wider fields-of-view.
FOV	See field of view.
frame animation	An animation through all frames of a particular view.
frame differencing	A form of temporal compression that involves examining redundancies between adjacent frames in a moving image sequence.
frame rate	The rate at which the frame animation in a view is played. Compare view rate.
front buffer	See prescreen buffer.
full panorama	A 360° panorama. Compare partial panorama.
go-back button	A button in the controller bar for panoramas that allows the user to return to the previous node.