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共 29 条记录，以下是1-10 订阅

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A psychologically-based simulation of human behaviour

A psychologically-based simulation of human behaviour

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3rd theory and practice of computer graphics conference, tpcg 2005

作者： Rymill, Stephen J. Dodgson, Neil A. University of Cambridge Computer Laboratory 15 JJ Thomson Avenue Cambridge CB3 0FD United Kingdom

ISBN: (纸本)3905673568

We describe a system designed to simulate human behaviour in crowds in real-time, concentrating particularly on collision avoidance. The algorithms used are based heavily on psychology research, and the ways this has been used are explained in detail. We argue that this approach gives better results than conventional methods, and detail further work to be done. © The Eurographics Association 2005.

关键词： Behavioral research

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An efficient caching technique for rendering translucentmaterials

An efficient caching technique for rendering translucentmate...

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3rd theory and practice of computer graphics conference, tpcg 2005

作者： Keng, Shih-Ling Lee, Wang-Yeh Chuang, Jung-Hong Department of Computer Science and Information Engineering National Chiao Tung University Taiwan

ISBN: (纸本)3905673568

This paper presents an efficient rendering technique for translucent materials using caches. The proposed caching scheme, inspired by the irradiance caching method, is integrated into a hierarchical rendering technique for translucent materials. We propose a split-disk model to determine the cache distribution and derive the subsurface illuminance gradient used for interpolation by reformulating the equation of dipole diffusion approximation as a 3D convolution process. Our experiments show that only a few caches are required to interpolate the entire image, while the visual difference is negligible. The speedup could be achieved up to one order of magnitude. © The Eurographics Association 2005.

关键词： Rendering (computer graphics)

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Perceptual level of detail for efficient ray tracing of complex scenes

Perceptual level of detail for efficient ray tracing of comp...

引用

3rd theory and practice of computer graphics conference, tpcg 2005

作者： Yang, X. Chalmers, A. Department of Computer Science University of Bristol United Kingdom

ISBN: (纸本)3905673568

Rendering complex scenes in real time remains one of the major challenges in computer graphics. Recent research in perceptual rendering algorithms and level of detail techniques have shown that, by exploiting knowledge of the human visual system, significant computation time can be saved by only rendering in high quality those parts of the image that the user will see. This paper describes how a level of detail approach can be used to reduce overall computation time when users are undertaking a task within a virtual environment. © The Eurographics Association 2005.

关键词： Ray tracing

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Arachnid simulation: Scaling arbitrary surfaces

Arachnid simulation: Scaling arbitrary surfaces

引用

3rd theory and practice of computer graphics conference, tpcg 2005

作者： Ap Cenydd, L. Teahan, W. School of Informatics University of Wales Bangor United Kingdom

ISBN: (纸本)3905673568

There has been little research done into the realistic simulation of creatures with the ability to crawl across arbitrary surfaces, clamber up walls and walk across ceilings. Realistic simulation of such feats would be of benefit to fields such as arthropod phobia therapy, the animation of computer game characters and Artificial Life research. We have implemented a system that can produce real-time simulation of a spider traversing across an arbitrary surface. The simulation uses a combination of a behavioral system, an orientation system, a procedural gait generator and an inverse kinematics solver to produce the real-time dynamic animation. © The Eurographics Association 2005.

关键词： computer games

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VRECKO: Virtual reality framework

VRECKO: Virtual reality framework

引用

3rd theory and practice of computer graphics conference, tpcg 2005

作者： Flasar, Jan Pokluda, Ludek Ošlejšek, Radek Kolcárek, Pavel Sochor, Jirí Human-Computer Interaction Laboratory Faculty of Informatics Masaryk University Brno Czech Republic

ISBN: (纸本)3905673568

In this paper, we present a framework for experimenting with virtual environments. The architecture of the system VRECKO is designed for the rapid prototyping of techniques for human-computer interaction. The architecture is flexible, but simple. Virtual environment entities and other components can be configured at run time. We demonstrate the flexibility of the approach on several examples of experiments and tools which were realized in VRECKO. © The Eurographics Association 2005.

关键词： Virtual reality

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Integrating abstract and physicalmolecularmodel interaction

Integrating abstract and physicalmolecularmodel interaction

引用

3rd theory and practice of computer graphics conference, tpcg 2005

作者： Thorne, Dave Pettifer, Steve Attwood, Terri Advanced Interfaces Group School of Computer Science University of Manchester United Kingdom Sequence Analysis Group Faculty of Life Sciences University of Manchester United Kingdom

ISBN: (纸本)3905673568

Historically, bioinformaticians have carried out protein analysis in one of two ways: by concentrating on either the physical structural representation of the subject data or a more abstract sequential representation. This paper describes a system currently in development at The University of Manchester that attempts to unify these two paradigms. We discuss the use of high-end rendering techniques to greatly increase the level of detail and interactivity of molecular visualisation, and describe the requirements placed upon that visualisation by the relationship between the abstract and physical models. © The Eurographics Association 2005.

关键词： Visualization

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theory and practice of computer graphics 2005, tpcg 2005 - Eurographics UK Chapter Proceedings

Theory and Practice of Computer Graphics 2005, TPCG 2005 - E...

引用

3rd theory and practice of computer graphics conference, tpcg 2005

ISBN: (纸本)3905673568

The proceedings contain 26 papers. The topics discussed include: key framing particles of physically based systems;real-time animation of particles and sea weeds in underwater scenes;implementing an improved stereoscopic camera model;a psychologically-based simulation of human behavior;an efficient caching technique for rendering translucent materials;selective parallel rendering for high-fidelity graphics;virtual sculpting using implicit surfaces with scattered data interpolation;integrating abstract and physical molecular model interaction;perceptually-oriented interest management in large-scale networked virtual environments;perceptual level of detail for efficient ray tracing of complex scenes;cost prediction maps for global illumination;towards realism in facial image prototyping: results of a wavelet MRF method;and fast simulation of facial tissue deformations using mass-spring chain algorithm.

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The data surface interaction paradigm

The data surface interaction paradigm

引用

3rd theory and practice of computer graphics conference, tpcg 2005

作者： Lindell, Rikard Larsson, Thomas Department of Computer Science Mälardalen University Sweden

ISBN: (纸本)3905673568

This paper presents, in contrasts to the desktop metaphor, a content centric data surface interaction paradigm for graphical user interfaces applied to music creativity improvisation. Issues taken into account were navigation and retrieval of information, collaboration, and creative open-ended tasks. In this system there are no windows, icons, menus, files or applications. Content is presented on an infinitely large two-dimensional surface navigated by incremental search, zoom, and pan. Commands are typed aided by contextual help, visual feedback, and text completion. Components provide services related to different content modalities. Synchronisation of data surface content sustains mutual awareness of actions and mutual modifiability. The prototype music tool was evaluated with 10 users;it supported services expected by users, their creativity in action, and awareness in collaboration. User responses to the prototype tool were: It feels free, it feels good for creativity, and it's easy and fun to use. © The Eurographics Association 2005.

关键词： Graphical user interfaces

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Implementing fastmap on the gpu: Considerations on general-purpose computation on graphics hardware

Implementing fastmap on the gpu: Considerations on general-p...

引用

3rd theory and practice of computer graphics conference, tpcg 2005

作者： Reina, G. Ertl, T. Visualization and Interactive Systems Institute University of Stuttgart Germany

ISBN: (纸本)3905673568

In this paper we focus on the implications of implementing generic algorithms on graphics hardware. As an example, we ported the dimensionality reduction algorithm FastMap to fragment programs and thus accelerated it by orders of magnitude, allowing for interactive tweaking and evaluating of the algorithm parameters for datasets of several hundred thousand points and tens of dimensions;even the animation of structural changes in relation to parameters is possible. This allows to complement the algorithmic heuristic used by FastMap by explorative results from human interaction. Such an approach can be considered a heuristic in itself, but has the advantage of being based on visual feedback, therefore allowing for iterative improvement of the results. Thus we demonstrate how to benefit from the high execution parallelism on commodity graphics hardware as an alternative to making use of other, more costly, multiprocessing techniques. We discuss performance and bandwidth aspects as well as accuracy problems since these results are of more general interest and can be applied to general processing on graphics hardware as a whole. © The Eurographics Association 2005.

关键词： Visual communication

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Freehand 3D curve recognition and oversketching

Freehand 3D curve recognition and oversketching

引用

3rd theory and practice of computer graphics conference, tpcg 2005

作者： Han, Li De Amicis, Raffaele Conti, Giuseppe Italy

ISBN: (纸本)3905673568

In the CAD/CAS field, the increasing domination of spline-based graphic objects has driven a great attention to methods focusing on the management of free-form curves. Based on the quick brainstorm illustration and stepwise refinement characteristics in conceptual designing stage, we present a method, which automatically reconstructs the designer's free-form 3D curve through recognizing his design "intention". This algorithm automatically extracts the relevant control points through corner detection and dynamic-threshold sampling mechanism;as a result the Bspline curve is approximately produced. Furthermore, considering the ambiguity of designer's intention during the conceptual designing, this redraw operation feature is implemented through the so-called "over-sketching". For this we introduce constrained length and tangent angle features, which supports fully free form 3D curve sketching, and it is capable of effectively smoothen transition interval. The method has been tested with various types of sketches, which are rendered in 3D scene environment. We further discuss the modification and its application to surfaces. © The Eurographics Association 2005.

关键词： computer aided design

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