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Proceedings Paper

Visualization of events from arbitrary spacetime perspectives
Author(s): Michael D'Zmura; Philippe Colantoni; Gregory D. Seyranian
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Paper Abstract

Methods for representing spacetime events as hyperobjects in 4D space have been developed that let one examine events from arbitrary spacetime perspectives. 3D objects that move either rigidly or nonrigidly are extruded to create 4D hyperobjects. The boundaries of the 4D objects are represented using polyhedra, in much the same way that the boundaries of 3D objects may be represented using polygons. The user views one or more static, 4D hyperobjects using software which lets the user control in an interactive, realtime fashion the position and orientation of a 3D cross- section of the hyperobjects. The 3D cross-sections are rendered using standard techniques of 3D computer graphics. Extrusion of nonrigid 3D objects is useful for visualizing events that involve objects with time-varying shape. For instance, one can use nonrigid extrusion to visualize a character animation, in which multiple frames of a walking humanoid character are used to create a single, static hyperobject that represents the entire animation. With these methods, one need no longer be limited to watching a movie in which time is a hidden axis. Rather, one can view and alter events immersively from arbitrary vantage points.

Paper Details

Date Published: 28 February 2000
PDF: 6 pages
Proc. SPIE 3960, Visual Data Exploration and Analysis VII, (28 February 2000); doi: 10.1117/12.378912
Show Author Affiliations
Michael D'Zmura, Univ. of California/Irvine (United States)
Philippe Colantoni, Univ. Jean Monnet de St. Etienne (United States)
Gregory D. Seyranian, Univ. of California/Irvine (United States)


Published in SPIE Proceedings Vol. 3960:
Visual Data Exploration and Analysis VII
Robert F. Erbacher; Philip C. Chen; Jonathan C. Roberts; Craig M. Wittenbrink, Editor(s)

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