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Start date: 1982 × End date: 1982 ×

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    GRAPHIC DISPLAYS IN THE COMPUTER AIDED DESIGN OF LIFT SYSTEMS
    (The Eurographics Association, 1982) Barney, G.C.; D.S. Greenaway and E.A. Warman
    The sizing of lift systems to meet passenger demands is normally carried out in a quantitative way by calculation. Nothing is done to determine the quality of service provided. This paper describes how a computer aided design suite using discrete simulation techniques coupled to extensive graphic displays overcomes these deficiencies.
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    A FAST ALGORITHM FOR COLOUR REGION SEGMENTATION
    (The Eurographics Association, 1982) Stark, J.P.W.; Mahdavieh, Y.; Tjahjardi, T.; D.S. Greenaway and E.A. Warman
    An algorithm is described which analyses colour scenes in terms of regions. These regions are defined to have the same 'colour'. In this context the colour of a region is determined by its position in the CIE chromaticity diagram. The procedure outlined reduces the three-dimensional colour cube to a one-dimensional colour grey-scale. This approach significantly reduces the amount of data and also the amount of processing required in colour scene analysis.
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    ON CONSTRUCTING INTERACTIVE GRAPHICS SYSTEMS
    (The Eurographics Association, 1982) Hanusa, Henning; Kuhlmann, Herbert W.; Pfaff, Günther E.; D.S. Greenaway and E.A. Warman
    Abstract: A framework for generating a graphics dialogue system dedicated to special application, user, and graphics hardware characteristics is presented. A prerequisite is the design of common dialogue methods and the establishing of a dialogue library. Due to environment dependent parameters a prototype dialogue-subsystem is configured. The evaluation of data being monitored during interactive sessions leads to subsequent re-configuration steps.
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    A COMPUTER GRAPHICS PACKAGE FOR TEACHING CRYSTAL MORPHOLOGY
    (The Eurographics Association, 1982) Angell, Ian O.; Moore, Moreton; D.S. Greenaway and E.A. Warman
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    GRAPH: An Interactive Program based on the Graphical Kernel System
    (The Eurographics Association, 1982) Slater, M.; Baker, R. J.; D.S. Greenaway and E.A. Warman
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    INTERACTIVE GENERATION OF 3-DIMENSIONAL COMPUTER GRAPHICS
    (The Eurographics Association, 1982) Sutty, George J.; D.S. Greenaway and E.A. Warman
    A new technology employing a vibrating mirror produces spacefilling images. An observer views a reflection of a CRT in a moving mirror. By displaying a proper sequence of pictures 30 times a second, a space filling three-dimensional image is formed. A computer-driven graphics terminal using this technique has been developed. This paper describes the optical principles behind the display and the components of the terminal. Several new algorithms which are unique to the new system are described. Finally, areas of application for the terminal are listed, and the utility and limitations of the system are discussed.
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    COMPUTER-AIDED DESIGN SYSTEM FOR THREE-DIMENSIONAL SHAPE PLANE FIGURES SHOE MAKING APPLICATION
    (The Eurographics Association, 1982) DULLIN, Eric; OUARET, Seddik; MAY, Paul; D.S. Greenaway and E.A. Warman
    "POK" is provided, through a purposely designed measuring appliance, for digitizing (in cylindrical coordinates) skew three-dimensional patterns in an automatic way as well as for carrying out an interactive 2D processing of their schematic representations (projections, developed views) (1). Besides, a two-directional relation between the three-dimensional shape and the given 2D representation is made possible by the system : drawing on 3D pattern from 2D digitizing on a board. 2D drawing from 3D digitizing on the very pattern.
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    THE IMPORTANCE OF A CORRECT APPROACH TO THE DESIGN OF METAFILES STANDARDS
    (The Eurographics Association, 1982) Arnold, David B.; D.S. Greenaway and E.A. Warman
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    A METHODOLOGY FOR POPULATING DEFAULT COLOR MAPS
    (The Eurographics Association, 1982) Straayer, David H.; D.S. Greenaway and E.A. Warman
    A standard for using colors in computer graphics systems is proposed. A key aspect of this proposed standard is to allow two different levels of access to colors. At the first level, colors are selected from a standard list. To draw a red line, for example, a user would simply issue a command that says, in effect, draw lines in color number two. The association between two and red comes from a standard color map. At the second level, colors can be precisely chosen or mixed from a three-dimensional color model. The first level is a strict subset of the second level. Users can access colors at the level appropriate to their experience or application need and can move from one level to the other as required. The keystone of this proposal is a method for defining a device-independent default color
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    ANALYSIS OF THE DESIGN PROCESS AS BASIS FOR THE DEFINITION OF CAD-FUNCTIONS DISTRIBUTED ON HIERARCHICAL NETWORKS
    (The Eurographics Association, 1982) Gorny, Peter; D.S. Greenaway and E.A. Warman
    It seems to be no question any more, that intelligent graphics work stations will be integrated as terminals into networks, especially because of the process in hardware and network development. But we do not know yet, which of the graphics and CAD functions will have to be kept local, i.e. on the first processor seen from the user, and which may be placed on more remote processors. The author analyses the designers activities when constructing a new technical object and defines a hierarchy of functions. From this proposal a graphics/CAD system architecture is derived with a functional hierarchy of "pipelined" processors and an outline of a system currently under implementation is given.