Issue 2/3

Permanent URI for this collection

https://diglib.eg.org/handle/10.2312/4

Browse

Browsing Issue 2/3 by Issue Date

Filter results by year or month
Now showing 1 - 14 of 14
  • No Thumbnail Available
    Item
    Set Operations of GWB
    (Blackwell Publishing Ltd and the Eurographics Association, 1983) Mantyla, M.
    A set operation algorithm that can be used to unite, intersect, or subtract solids with each other is an essential part of any solid modelling system. The problem is, however, difficult to solve while maintaining the well-formedness of the underlying solid representations. The Geometric Workbench, an experimental solid modeller constructed by the author, uses so-called Euler operators in its set operation algorithm to solve the problem of integrity. This leads to a robust algorithm with a simple overall structure and a clear separation between geometric and topological steps.
  • No Thumbnail Available
    Item
    Interactive Computer Graphics Applied to Chemistry: Experiences and New Developments
    (Blackwell Publishing Ltd and the Eurographics Association, 1983) Combremont, J-J; Roch, M.; Weber, J.
    This paper is essentially a progress report on three years of effort in computer graphics applied to chemistry. The major technical and human problems encountered when running our facility and integrating it into a chemistry department are described. Then progress of our research project, which is developing application programs in several areas of computer graphics applied to chemical education and research, is reviewed. Recent developments in the field of the representation of dynamic processes in molecules and illustrating some basic concepts of reaction mechanisms in organic chemistry are presented, and the important role of graphics in depicting adequately 3D reaction paths is stressed. Finally, some technical problems arising when using the calligraphic system as an audio-visual tool for teaching chemistry are discussed and some possible solutions are presented.
  • No Thumbnail Available
    Item
    Announcement General Assembly of the EUROGRAPHICS Association
    (Blackwell Publishing Ltd and the Eurographics Association, 1983)
  • No Thumbnail Available
    Item
    THE GKS CONTROL BOARD
    (Blackwell Publishing Ltd and the Eurographics Association, 1983) Enderle, G.
  • No Thumbnail Available
    Item
    A VLSI Implementation of the Graphics Standard GKS
    (Blackwell Publishing Ltd and the Eurographics Association, 1983) Encarnacao, J L; Lindner, R.; Mehl, M.; Pfaff, G.; Strasser, W.
    The main advantage when using a standardized graphics system is quite obvious: the application programs become portable. Integrating such a system - and GKS (Graphical Kernel System) is the only one being standardized internationally - into VLSI (Very Large Scale Integration) chips, this graphics system may become an integral part of graphical devices. This guarantees a uniform interface of such devices to GKS applications. Devices of many different kinds will become compatible not only with respect to plugging but even in their logical behaviour, eliminating all device dependencies from the host software.We have started to design the GKS-chip which will be able to be used in a great variety of devices (vector and raster type). The GKS-chip will bring the computational power to support real time picture updates, limited only by the maximally attainable output data rate.
  • No Thumbnail Available
    Item
    An Algebraic Approach to the Standardization and the Certification of Graphics Software
    (Blackwell Publishing Ltd and the Eurographics Association, 1983) Gnatz, R.
  • No Thumbnail Available
    Item
    The New Visual Age: The Influence of Computer Graphics on Art and Society
    (Blackwell Publishing Ltd and the Eurographics Association, 1983) Franke, H. W.
    Only a few years ago it would have seemed ridiculous to discuss the influence of computer graphics on art and society. Although computer generated graphics had already been applied in important areas of science and technology, its influence was not yet felt in the arts or in society at large. Those few who used the computer as an artistic instrument were regarded as outsiders: with their freelance experiments they deviated from the solid ground of strictly defined tasks, but on the other hand found no approval in artistic circles. One of the causes for this lack of approval may have been that they did not submit to the frequently changing fashions which are prevalent in today-s visual arts. Rather, they were, at least in the beginning when searching for motifs, guided by mathematical and geometrical aspects. The fact that they succeeded in opening up a largely unknown realm of graphically attractive forms went unheeded by the critics.
  • No Thumbnail Available
    Item
    EDITORIAL
    (Blackwell Publishing Ltd and the Eurographics Association, 1983)
  • No Thumbnail Available
    Item
    Executive Committee Meeting 25 April 1983, Amsterdam, The Netherlands
    (Blackwell Publishing Ltd and the Eurographics Association, 1983)
  • No Thumbnail Available
    Item
    CALL FOR PARTICIPATION EUROGRAPHICS WORKING GROUP GRAPHICS PROGRAMMING
    (Blackwell Publishing Ltd and the Eurographics Association, 1983)
  • No Thumbnail Available
    Item
    SADIST: an Interactive Editor for Structured Analysis
    (Blackwell Publishing Ltd and the Eurographics Association, 1983) Munro, A T D
    An interactive editor for a computer-aided documentation system based on Structured Analysis (SA) is described. The paper investigates the potential offered by computer graphics in the implementation of the editor and discusses the hardware and software support that is required. Interactive enforcement of SA rules and the ability to accept non-deterministic input for modeless editing are identified as key factors.
  • No Thumbnail Available
    Item
    EUROGRAPHICS Working Group Computer Graphics Networking
    (Blackwell Publishing Ltd and the Eurographics Association, 1983)
  • No Thumbnail Available
    Item
    The GKS Input Facilities and How To Use Them
    (Blackwell Publishing Ltd and the Eurographics Association, 1983) Rosenthal, D S H
    The input facilities of GKS, the draft international standard for 2-D graphics software, are presented from an application programmer-s viewpoint. The basic concepts are reviewed, concentrating on the differences between GKS and earlier systems.These input facilities can be used in three distinct styles. One provides high portability by sacrificing control over details of the user interface. Another can exploit hardware capabilities by sacrificing portability. A third can provide portability and control over the user interface, at the cost of extra application code. All three styles are described, and illustrated with skeleton applications.
  • No Thumbnail Available
    Item
    The Development of Programs for the Processing of Parametric Curves
    (Blackwell Publishing Ltd and the Eurographics Association, 1983) Koparkar, P A; Mudur, S P
    This paper presents the development of a suite of programs for the processing of parametrically defined curves in two and three dimensions. The programs are presented in Dijkstra-s non-deterministic guarded command notation. The development of the proof of correctness for the programs is also described. Three typical curve processing tasks, such as drawing, curve path following and intersection detection, are described.The algorithms used in these programs are all based on the "divide and conquer (subdivision)" paradigm. Deviation from linearity and Euclidean bounds are two curve shape properties that are used in many of the curve processing tasks. We present fast methods of computing these properties from the algebraic representation of the curve. In particular the paper considers the cubic and the rational quadratic forms of representation.