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28 February 2000 Visualization of events from arbitrary spacetime perspectives
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Proceedings Volume 3960, Visual Data Exploration and Analysis VII; (2000)
Event: Electronic Imaging, 2000, San Jose, CA, United States
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.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Michael D'Zmura, Philippe Colantoni, and Gregory D. Seyranian "Visualization of events from arbitrary spacetime perspectives", Proc. SPIE 3960, Visual Data Exploration and Analysis VII, (28 February 2000);


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