John Vince – författare

This book tells the life stories of the more familiar saints, the associated folklore, the patronage, the emblems, the place names, the shrines and the festivals. There is a calendar of saints' days.

Horse brasses are flat, generally round, ornaments for decorating the harness of draught horses. First devised as charms to keep the animal safe, brasses later became purely decorative. This book traces the history of horse brasses, from the plain, simple early examples through to the more advanced brasses that were developed as our knowledge of brass casting improved. Packed with over 200 photographs of different horse brasses, this classic title is an ideal collector's introduction, and a section on the care, cleaning and renovation of horse brasses makes this essential reading for new collectors.

Rotation transforms are used everywhere in computer graphics from rotating pictures in editing software, to providing an arbitrary view of a 3D virtual environment. Although the former is a trivial operation, the latter can be a challenging task. Rotation Transforms for Computer Graphics covers a wide range of mathematical techniques used for rotating points and frames of reference in the plane and 3D space. It includes many worked examples and over 100 illustrations that make it essential reading for students, academics, researchers and professional practitioners. The book includes introductory chapters on complex numbers, matrices, quaternions and geometric algebra, and further chapters on how these techniques are employed in 2D and 3D computer graphics. In particular, matrix and bivector transforms are developed and evaluated to rotate points in a fixed frame of reference, and vice versa.

The Hamiltonian, which is used in quantum physics to describe the total energy of a system, would have been a major achievement for anyone, but Hamilton also invented quaternions, which paved the way for modern vector analysis.

_----- 1 Introduction The USPresident's Information Technology Advisory Committee (PITAC)recently advised the US Senate of the strategic importance of investing in IT for the 21st century, particularlyin the areas of software,human-computer interaction, scalable information infrastructure, high-end computing and socioeconomic issues [1].

The very word "digital" has acquired a status that far exceeds its humble dictionary definition. Even the prefix digital, when associ­ ated with familiar sectors such as radio, television, photography and telecommunications, has reinvented these industries, and provided a unique opportunity to refresh them with new start-up companies, equipment, personnel, training and working practices - all of which are vital to modern national and international economies. The last century was a period in which new media stimulated new job opportunities, and in many cases created totally new sectors: video competed with film, CDs transformed LPs, and computer graphics threatened traditional graphic design sectors. Today, even the need for a physical medium is in question. The virtual digital domain allows the capture, processing, transmission, storage, retrieval and display of text, images, audio and animation without familiar materials such as paper, celluloid, magnetic tape and plastic. But moving from these media to the digital domain intro­ duces all sorts of problems, such as the conversion of analog archives, multimedia databases, content-based retrieval and the design of new content that exploits the benefits offered by digital systems. It is this issue of digital content creation that we address in this book. Authors from around the world were invited to comment on different aspects of digital content creation, and their contributions form the 23 chapters of this volume.

One of the challenges facing professionals working in computer animation is keeping abreast of the latest developments and future trends - some of which are determined by industry where the state-of-the-art is continuously being re-defined by the latest computer-generated film special effects, while others arise from research projects whose results are quickly taken on board by programmers and animators working in industry. This handbook will be an invaluable toolkit for programmers, technical directors and professionals working in computer animation. A wide range of topics are covered including: *Computer games *Evolutionary algorithms *Shooting and live action *Digital effects *Cubic curves and surfaces *Subdivision surfaces *Rendering and shading Written by a team of experienced practitioners, each chapter provides a clear and precise overview of each area, reflecting the dynamic and fast-moving field of computer animation. This is a complete and up-to-date reference book on the state-of-the-art techniques used in computer animation.

"Advances in computer technology and developments such as the Internet provide a constant momentum to design new techniques and algorithms to support computer graphics. Modelling, animation and rendering remain principal topics in the filed of computer graphics and continue to attract researchers around the world." This volume contains the papers presented at Computer Graphics International 2002, in July, at the University of Bradford, UK. These papers represent original research in computer graphics from around the world and cover areas such as:- Real-time computer animation - Image based rendering - Non photo-realistic rendering - Virtual reality - Avatars - Geometric and solid modelling - Computational geometry - Physically based modelling - Graphics hardware architecture - Data visualisation - Data compression The focus is on the commercial application and industrial use of computer graphics and digital media systems.

As the Internet and the WWW impact on corporate and private activities, the human-computer interface is becoming a central issue for the designers of these systems. Such interfaces will decide the success or failure of future technologies, which will have to provide users with easy-to-use 'intelligent' problem solving tools.'Intelligent Agents' are likely to play a significant role in the design of these interfaces, and this book explores how they are starting to influence media-based systems.As you read Intelligent Agents for Mobile and Virtual Media, you will discover the considerable advances that have already been made on the long journey towards a day when computers will be truly described as an intelligent aid to our personal and business lives.

Although the computer's life has been relatively short, it has brought about an information revolution that is transforming our world on a scale that is still difficult to comprehend. This digital convergence is shaping society, technology and the media for the next millennium. Areas as diverse as home banking and shopping over the Internet; WWW access over mobile phone networks; and television systems such as Web TV which combine on-line services with television. But convergence is not just about technology. It is also about services and new ways of doing business and of interacting with society. Digital convergence heralds the 'Information Revolution'. Edited by John Vince and Rae Earnshaw this important new book on Digital Convergence: The Information Revolution is an edited volume of papers, bringing together state-of-the-art developments in the Internet and World Wide Web and should be compulsory reading for all those interested in and working in those areas.

The field of computer graphics combines display hardware, software, and interactive techniques in order to display and interact with data generated by applications. Visualization is concerned with exploring data and information graphically in such a way as to gain information from the data and determine significance. Visual analytics is the science of analytical reasoning facilitated by interactive visual interfaces.Expanding the Frontiers of Visual Analytics and Visualization provides a review of the state of the art in computer graphics, visualization, and visual analytics by researchers and developers who are closely involved in pioneering the latest advances in the field. It is a unique presentation of multi-disciplinary aspects in visualization and visual analytics, architecture and displays, augmented reality, the use of color, user interfaces and cognitive aspects, and technology transfer. It provides readers with insights into the latest developments in areas such as new displays and new display processors, new collaboration technologies, the role of visual, multimedia, and multimodal user interfaces, visual analysis at extreme scale, and adaptive visualization.

Matrix transforms are ubiquitous within the world of computer graphics, where they have become an invaluable tool in a programmer’s toolkit for solving everything from 2D image scaling to 3D rotation about an arbitrary axis. Virtually every software system and hardware graphics processor uses matrices to undertake operations such as scaling, translation, reflection and rotation. Nevertheless, for some newcomers to the world of computer games and animation, matrix notation can appear obscure and challenging.Matrices and determinants were originally used to solve groups of simultaneous linear equations, and were subsequently embraced by the computer graphics community to describe the geometric operations for manipulating two- and three-dimensional structures. Consequently, to place matrix notation within an historical context, the author provides readers with some useful background to their development, alongside determinants.Although it is assumed that the reader is familiar with everyday algebra and the solution of simultaneous linear equations, Matrix Transforms for Computer Games and Animation does not expect any prior knowledge of matrix notation. It includes chapters on matrix notation, determinants, matrices, 2D transforms, 3D transforms and quaternions, and includes many worked examples to illustrate their practical use.

The field of computer graphics combines display hardware, software, and interactive techniques in order to display and interact with data generated by applications. Visualization is concerned with exploring data and information graphically in such a way as to gain information from the data and determine significance. Visual analytics is the science of analytical reasoning facilitated by interactive visual interfaces.Expanding the Frontiers of Visual Analytics and Visualization provides a review of the state of the art in computer graphics, visualization, and visual analytics by researchers and developers who are closely involved in pioneering the latest advances in the field. It is a unique presentation of multi-disciplinary aspects in visualization and visual analytics, architecture and displays, augmented reality, the use of color, user interfaces and cognitive aspects, and technology transfer. It provides readers with insights into the latest developments in areas such as new displays and new display processors, new collaboration technologies, the role of visual, multimedia, and multimodal user interfaces, visual analysis at extreme scale, and adaptive visualization.

This second edition has been completely restructured, resulting in a compelling description of vector analysis from its first appearance as a byproduct of Hamilton’s quaternions to the use of vectors in solving geometric problems.  The result provides readers from different backgrounds with a complete introduction to vector analysis. The author shows why vectors are so useful and how it is possible to develop analytical skills in manipulating vector algebra.Using over 150 full-colour illustrations, the author demonstrates in worked examples how this relatively young branch of mathematics has become a powerful and central tool in describing and solving a wide range of geometric problems. These may be in the form of lines, surfaces and volumes, which may touch, collide, intersect, or create shadows upon complex surfaces.The book is divided into eleven chapters covering the history of vector analysis, linear equations, vector algebra, vector products, differentiating vector-valued functions, vector differential operators, tangent and normal vectors, straight lines, planes, intersections and rotating vectors. The new chapters are about the history, differentiating vector-valued functions, differential operators and tangent and normal vectors.  The original chapters have been reworked and illustrated.

This second edition has been completely restructured, resulting in a compelling description of vector analysis from its first appearance as a byproduct of Hamilton’s quaternions to the use of vectors in solving geometric problems.  The result provides readers from different backgrounds with a complete introduction to vector analysis. The author shows why vectors are so useful and how it is possible to develop analytical skills in manipulating vector algebra.Using over 150 full-colour illustrations, the author demonstrates in worked examples how this relatively young branch of mathematics has become a powerful and central tool in describing and solving a wide range of geometric problems. These may be in the form of lines, surfaces and volumes, which may touch, collide, intersect, or create shadows upon complex surfaces.The book is divided into eleven chapters covering the history of vector analysis, linear equations, vector algebra, vector products, differentiating vector-valued functions, vector differential operators, tangent and normal vectors, straight lines, planes, intersections and rotating vectors. The new chapters are about the history, differentiating vector-valued functions, differential operators and tangent and normal vectors.  The original chapters have been reworked and illustrated.

If you have ever wondered what quaternions are — then look no further, John Vince will show you how simple and useful they are.

If you have ever wondered what quaternions are — then look no further, John Vince will show you how simple and useful they are.

John Vince explains a comprehensive range of mathematical techniques and problem-solving strategies associated with computer games, computer animation, special effects, virtual reality, CAD and other areas of computer graphics in this completely revised and expanded seventh edition.The first five chapters cover a general introduction, number sets, algebra, trigonometry and coordinate systems, which are employed in the following chapters on determinants, vectors, matrix algebra, complex numbers, geometric transforms, quaternion algebra, quaternions in space, interpolation, statistics, curves and patches, analytical geometry and barycentric coordinates. Following this, the reader is introduced to the relatively new subject of geometric algebra, followed by two chapters that introduce differential and integral calculus. Finally, there are chapters on Fourier analysis and Worked examples.Mathematics for Computer Graphics covers all of the key areas of the subject, including:• Number sets• Algebra• Trigonometry• Complex numbers• Coordinate systems• Determinants• Vectors• Quaternions• Matrix algebra• Geometric transforms• Interpolation• Curves and surfaces• Analytic geometry• Statistics• Barycentric coordinates• Geometric algebra• Differential calculus• Integral calculus• Fourier analysisThis seventh edition contains approximately 200 worked examples and over 350 colour illustrations, which are central to the author’s descriptive writing style. Mathematics for Computer Graphics provides a sound understanding of the mathematics required for computer graphics software and setting the scene for further reading of more advanced books and technical research papers.

The convergence of IT, telecommunications, and media is changing the way information is collected, stored and accessed. This revolution is having effects on the development and organisation of information and artefact repositories such as libraries and museums. This book presents key aspects in the rapidly moving field of digital convergence in the areas of technology and information sciences. Its chapters are written by international experts who are leaders in their fields.

Geometric algebra (a Clifford Algebra) has been applied to different branches of physics for a long time but is now being adopted by the computer graphics community and is providing exciting new ways of solving 3D geometric problems.John Vince (author of numerous books including ‘Geometry for Computer Graphics’ and ‘Vector Analysis for Computer Graphics’) has tackled this complex subject in his usual inimitable style, and provided an accessible and very readable introduction.As well as putting geometric algebra into its historical context, John tackles complex numbers and quaternions; the nature of wedge product and geometric product; reflections and rotations (showing how geometric algebra can offer a powerful way of describing orientations of objects and virtual cameras); and how to implement lines, planes, volumes and intersections. Introductory chapters also look at algebraic axioms, vector algebra and geometric conventions and the book closes with a chapter on how the algebra is applied to computer graphics.

The convergence of IT, telecommunications, and media is changing the way information is collected, stored and accessed. This revolution is having effects on the development and organisation of information and artefact repositories such as libraries and museums. This book presents key aspects in the rapidly moving field of digital convergence in the areas of technology and information sciences. Its chapters are written by international experts who are leaders in their fields.

Geometric algebra (a Clifford Algebra) has been applied to different branches of physics for a long time but is now being adopted by the computer graphics community and is providing exciting new ways of solving 3D geometric problems.John Vince (author of numerous books including ‘Geometry for Computer Graphics’ and ‘Vector Analysis for Computer Graphics’) has tackled this complex subject in his usual inimitable style, and provided an accessible and very readable introduction.As well as putting geometric algebra into its historical context, John tackles complex numbers and quaternions; the nature of wedge product and geometric product; reflections and rotations (showing how geometric algebra can offer a powerful way of describing orientations of objects and virtual cameras); and how to implement lines, planes, volumes and intersections. Introductory chapters also look at algebraic axioms, vector algebra and geometric conventions and the book closes with a chapter on how the algebra is applied to computer graphics.

This volume presents state-of-the-art research from a wide area of subjects brought about by the digital convergence of computing, television, telecommunications and the World-Wide Web. It represents a unique snapshot of trends across a wide range of subjects including virtual environments; virtual reality; telepresence; human-computer interface design; interactivity; avatars; and the Internet. Both researchers and practitioners will find it an invaluable source of reference.

Geometry is the cornerstone of computer graphics and computer animation, and provides the framework and tools for solving problems in two and three dimensions. This may be in the form of describing simple shapes such as a circle, ellipse, or parabola, or complex problems such as rotating 3D objects about an arbitrary axis. Geometry for Computer Graphics draws together a wide variety of geometric information that will provide a sourcebook of facts, examples, and proofs for students, academics, researchers, and professional practitioners. The book is divided into 4 sections: the first summarizes hundreds of formulae used to solve 2D and 3D geometric problems. The second section places these formulae in context in the form of worked examples. The third provides the origin and proofs of these formulae, and communicates mathematical strategies for solving geometric problems. The last section is a glossary of terms used in geometry.

This text examines what is and what is not virtual reality. It provides a potted history of the field and explains in easy-to-understand terms what computer graphics are and how they are integral to VR systems. The part that human factors have to play in a good VR system is emphasized, such as sound, sight, touch and balance, and a working VR system is explored. The text also attempts to answer questions such as what hardware and software is used, how does multi-user VR work, can you network VR, and what are its applications?

Computer Animation is now worlds away from its early beginnings when programs merely mimicked the hand drawn cartoon process. Its now regularly used for creating wonderful special effects in major movies like Titanic, Toy Story, Antz and Bugs Life. John Vince tells you all about: The basic principles used in the powerful software products currently available on the market; The terms and processes involved; And in an easy-to-understand way, with no complicated math. So if you want to learn more about 3D computer animation without being swamped by complex mathematics, then read this book and have fun creating your own animated programs.

This volume presents the results of a joint National Science Foundation and European Commission Workshop which was set up to identify the future key strategic research directions in the areas of human-centred interaction, online communities and virtual environments. A research agenda is proposed for each area. There is an urgent need to make interaction more centred around human needs and capabilities, and to consider the human environment in virtual environments and in other contextual information-processing activities. The overall goal is to make users more effective in their information or communication tasks by reducing learning times, speeding up performance, lowering error rates, facilitating retention, and increasing subjective satisfaction. Online communities is an area of rapid and dynamic growth with new kinds of interaction, behaviours, communication, and relationship to the world of users and information. Guidelines for basic user interface design need to be extended to accommodate these new technologies and interfaces to users. Fruitful lines of research investigation in all these areas are set out in this book.

This volume presents state-of-the-art research from a wide area of subjects brought about by the digital convergence of computing, television, telecommunications and the World-Wide Web. It represents a unique snapshot of trends across a wide range of subjects including virtual environments; virtual reality; telepresence; human-computer interface design; interactivity; avatars; and the Internet. Both researchers and practitioners will find it an invaluable source of reference.