Wolfgang Straßer - Böcker

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The material presented in this book originates from the first Eurographics Workshop on Graphics Hardware, held in Lisbon, Portugal, in August 1986. Leading experts in the field present the state of their ongoing graphics hardware projects and give their individual views of future developments. The final versions of the contributions are written in the light of in-depth discussions at the workshop. The book starts a series of EurographicSeminars volumes on the state-of-the-art of graphics hardware. This volume presents a unique collection of material which covers the following topics: workstation architectures, traffic simulators, hardware support for geometric modeling, ray-tracing. It therefore will be of interest to all computer graphics professionals wishing to gain a deeper knowledge of graphics hardware.

The material in this book documents the presented papers, the discussions and additional contributions triggered by the EUROGRAPHICS workshop on Graphics Hardware held at the annual conference EG '87 in Amsterdam. The first part considers Algorithmic Aspects of graphics systems realisation. It is worthwhile to note that besides "classical" topics like Hidden-line Elimination or Ray-Tracing, new results of computional geometry are presented in a hardware-oriented context. The second part on Subsystems describes hardware solutions for special tasks in the computer image generation pipeline, e. g. fast coordinate transformation and perspective projection. The last part addresses System Architecture. It demonstrates by rather different examples the wide range of possible and feasible solutions to build graphics hardware. Unlike the situation in graphics software where a common understanding and an accepted concept has been formed by the standardization process, many architectural options are still to be exploited and evaluated.Especially the interaction between VLSI opportunities, newly developed algorithms, and the increasing diversity of applications encourage again and again innovative solutions and keep graphics hardware a lively working area.

This book originates from the lectures given at the international conference "Theory and Practice of Geometric Modeling", Blaubeuren, FRG, October 3-7, 1988, that brought together leading experts from universities, system developers, and system users, to discuss new concepts and future trends in geometric modeling. The book covers a variety of topics on an advanced level and is organized as follows. Part A contains new algorithms and techniques for modeling objects that are bounded by free form surfaces. Part B focuses on surface/surface intersections, new types of blending surfaces and speed ups for ray tracing. Part C contains some new geometric tools. Part D discusses different representation schemes in solid modeling, conversions between these different schemes, and some applications. Part E covers some issues of product modeling, automatic tolerancing, high level specification of solid models (constraints, features) and the need for better user interfaces.

Problems common to graphics and robotics are covered in this reviewed selection of papers, written following a 1993 workshop. Leading experts from both disciplines met to identify common problems, to present new solutions, and to discuss future research directions. Topics covered include robot simulation using graphics workstations, simulation concepts in the framework of teleoperation, path planning strategies, collision techniques, experimentation using virtual reality, modelling techniques for automated programming and for objects with curved surfaces, object-oriented implementations, various aspects of robot vision, and - in a paper that reflects the essence of the workshop - the challenging task of designing a vision system for a domestic robot.

The state of the art of geometric modeling is described and discussed in this volume, based on the international conference held in Blaubeuren, Germany, in October 1996. The contributions cover the most relevant topics in the field at an advanced level and are authored by leading experts from universities, CAD system vendors, and users of geometric modelers. The book is organized into parts dealing with: mathematical tools for geometric modeling, including variational design, particle systems, and interpolation and approximation methods; representations in solid modeling and conversion problems; requirements to be met by a modeler for the automotive industry; and applications like automated assembly. The readability and clarity of the text is supported by fine illustrations.

This book is a result of the lectures and discussions during the conference "Theory and Practice of Geometric Modeling". The event has been organized by the Wilhelm-Schickard-Institut fiir Informatik, Universitat Tiibingen and took place at the Heinrich-Fabri-Institut in Blaubeuren from October 3 to 7, 1988. The conference brought together leading experts from academic and industrial research institutions, CAD system developers and experien­ ced users to exchange their ideas and to discuss new concepts and future directions in geometric modeling. The main intention has been to bridge the gap between theoretical results, performance of existing CAD systems and the real problems of users. The contents is structured in five parts: A Algorithmic Aspects B Surface Intersection, Blending, Ray Tracing C Geometric Tools D Different Representation Schemes in Solid Modeling E Product Modeling in High Level Specifications The material presented in this book reflects the current state of the art in geometric modeling and should therefore be of interest not only to university and industry researchers, but also to system developers and practitioners who wish to keep up to date on recent advances and new concepts in this rapidly expanding field. The editors express their sincere appreciation to the contributing authors, and to the members of the program committee, W. Boehm, J. Hoschek, A. Massabo, H. Nowacki, M. Pratt, J. Rossignac, T. Sederberg and W. Tiller, for their close cooperation and their time and effort that made the conference and this book a success.

EUROGRAPHICS workshops on Graphics hardware have now become an established forum for an exchange of information con­ cerning the latest developments in this field of growing importance. The first workshop took place during EG'86 in Lisbon. All parti­ cipants in this event considered it a very rewarding workshop to be repeated at future EG conferences. This view was reinforced at the EG'87 Hardware Workshop in Amsterdam which firmly esta­ blished the need for and a high interest in such a colloquium of technical discussion in this specialist area within the annual EG conference. The third EG Hardware Workshop took place in Nice in 1988 and this volume is a record of the fourth workshop at EG'89 in Hamburg. The material in this book contains papers representing a com­ prehensive record of the contributions to the 1989 workshop. The first part considers Algorithms and Architectures of graphics systems. These papers discuss the broader issues of system design, without necessarily raising issues concerning the details of the implementation. The second part on Systems describes hardware solutions and realisations of machines dedicated to graphics processing. Many of these contributions make important references to algorithmic and architectural issues as well, but there is now a greater emphasis on realisation. Indeed many VLSI designs are described.

This book is a collection of the best papers originally presented as state-of-the-art reports or tutorials at the EUROGRAPHICS'91 conference in Vienna. A choice has been made giving priority to information of lasting value. Another goal was to cover all aspects of computer graphics -except hardware -as completely as possible from modelling to advanced visualization and communication. The editors consider that the ten contributions by internationally renowned experts fulfil this goal perfectly. Some important problem areas are treated from different viewpoints thus enhancing and deepening the reader's perspective. Sabine Coquillart Wolfgang Strafier Peter Stucki Table of Contents l. Through the Cracks of the Solid Modeling Milestone 1 J arek R. Rossignac 2. Kinematics and Dynamics for Computer Animation 76 H. Ruder, T. Ertl, K. Gruber, M. Gunther, F. Hospach, M. Ruder, J. Subke, K. Widmayer 3. Dynamic Animation of Deformable Bodies 118 Marie-Paul Gascuel, Claude Puech 4. Stochastic Methods and Non-Fractal Applications 140 Huw Jones 5. State of the Art in Volume Visualization 166 Arie Kaufman 6.On the Theorey and Application of Stereolithographics in Scientific Visualization 178 Eric Hibbard, Michael Bauer, Margaret Bradshaw, Glenn Deardorff, Ken Hu, David Whitney 7. User Interface Management Systems: Present and Future 197 Michel Beaudouin-Lafon 8. Trends in Edge Detection Techniques 224 Eduard Antoniu 9.