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Now showing 1 - 6 of 6
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    Recent Developments and Applications of Haptic Devices
    (Blackwell Publishers, Inc and the Eurographics Association, 2003) Laycock, S. D.; Day, A. M.
    Over recent years a variety of haptic feedback devices have been developed and are being used in a number of important applications. They range from joysticks used in the entertainment industry to specialised devices used in medical applications. This paper will describe the recent developments of these devices and show how they have been applied. It also examines how haptic feedback has been combined with visual display devices, such as virtual reality walls and workbenches, in order to improve the immersive experience.ACM CSS: H.5.2 Information Interfaces and Presentation-Haptic I/O; I.3.8 Computer Graphics-Applications; I.6 Simulation and Modelling-Applications
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    Compression of Large-Scale Terrain Data for Real-Time Visualization Using a Tiled Quad Tree
    (The Eurographics Association and Blackwell Publishing Ltd., 2004) Platings, M.; Day, A. M.
    The aim of the rapid world modeling project is to implement a system to visualize the topography of the entire world on consumer-level hardware. This presents a significant problem in terms of both storage requirements and rendering speed. This paper presents the a??Tiled Quad Treea??, a technique and format for the storage of digital terrain models, to work as part of an integrated system for the visualization of global terrain data. We show how this format efficiently stores and compresses elevation data, in a way that allows the data to be read very rapidly from hard disk or similar storage medium, to facilitate real-time rendering. The results of compressing several distinct data sets are presented.
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    Image Registration in a Coarse Three-Dimensional Virtual Environment
    (The Eurographics Association and Blackwell Publishing Ltd., 2006) Laycock, R. G.; Day, A. M.
    In recent years, the availability of off-the-shelf geometric data for an urban environment has increased. During rendering, ground level images are mapped onto the facades of the buildings to improve the visual quality of the scene. This paper focuses on a technique that enables ground level images to be automatically integrated into an existing coarse three-dimensional environment. The approach utilises the planar nature of architectural scenes to enable the automatic extraction of a building facade from an image and its registration into the virtual environment.
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    Survey of Real-Time Rendering Techniques for Crowds
    (The Eurographics Association and Blackwell Publishing Ltd., 2005) Ryder, G.; Day, A. M.
    Real-time rendering of photo-realistic humans is considerably outside the scope of current consumer-level computer hardware. There are many techniques, which attempt to bridge the gap between what is desired and what is possible. This paper aims to give an overview of the techniques designed to alter the complexity of the model s geometry (level of detail), or replace it with a flat image (visual impostor) and to improve the lighting model (lighting and shadows). Recent years have shown a boom in the power and availability of consumer-level programmable graphics processors, thus techniques that make use of these features are coming to the forefront.
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    Erratum: Conflict Neutralization on Binary Space Partitioning
    (Blackwell Publishers Ltd and the Eurographics Association., 2001) James, A.; Day, A. M.
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    Haptic Device Control - Will it Fit Standardized Input Models?
    (Blackwell Publishers Ltd and the Eurographics Association, 2001) Arnold, D. B.; Day, A. M.; Jennings, V.; Courtenay, A.; Duce, D. A.
    Over recent years a wide variety of interaction devices involving haptic feedback have been brought to the market, but they vary widely in terms of input measures recorded. These range from one dimensional input on a haptic feedback steering wheel to a six degree of freedom position and orientation device and further, to assemblies of such devices. On the surface most of the variations can be accommodated logically with standardized input models combining existing logical input devices and haptic feedback processes as acknowledgement/echos. However it is very uncertain whether such a model can adequately model the system requirements for effective haptic feedback.In this paper we review the input models that have developed over the past 20 years and ask "Is it the end of the road for the conceptual model of input incorporated into the early graphics standards and elaborated over the years?" In addition, to highlight the problems of implementation with haptic interaction, we describe a typical application, the simulation of a collision with a virtual wall.