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- W173856167 abstract "When creating a virtual-environment (VE) application, there is often a conflict between the complexity of the virtual environment and the update rate of the system. Typically, more complex environments are more useful and interesting, but may require more rendering work than the graphics system can perform at interactive rates. The viper application gives improved performance in a VE visualization application by allowing the user to trade off image quality for interactive performance. The user can specify a given update rate and viper will attempt to match that rate by simplifying the scene. The user can specify that he wants a full-complexity image (with a correspondingly slower update rate) at any time. 1 . Introduction Virtual-environments systems often use head-mounted displays (HMDs) in order to either immerse the user in a virtual world or superimpose virtual objects into the real environment. In both cases, the system needs to respond almost instantaneously to user movements, or the illusion will be degraded. The delay between the user's movement (e.g., a head rotation) and the update of the image on the HMD is known as latency or lag, and it has been shown to have detrimental effects on operator performance in numerous studies. For complicated scenes or objects, image generation is often the largest contributor to the system latency. If the virtual objects contain tens of thousands of polygons, the graphics engine is often incapable of rendering stereo images at interactive rates. Viper is a VE application that allows the user to move around complex models in real time by simplifying the scene until the requested update rate is met or until the user demands a full-complexity view. The premise is that for some types of visualization (as opposed to simulation), much of the user's time in the virtual environment is spent getting into position in order to examine some virtual object or objects, and during this navigation time, full-complexity models are not necessary. Thus, the application may be able to reduce the complexity of the virtual objects in order to give good response while the user is moving, and then, once in position, the user can specify (via a button press or command) that the system should use the full-complexity, slower version of the model." @default.
- W173856167 created "2016-06-24" @default.
- W173856167 creator A5046763903 @default.
- W173856167 date "2010-01-01" @default.
- W173856167 modified "2023-09-24" @default.
- W173856167 title "Viper: A Quasi-Real-Time Virtual-Environment Application" @default.
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