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Item GRAPHIC DISPLAYS IN THE COMPUTER AIDED DESIGN OF LIFT SYSTEMS(The Eurographics Association, 1982) Barney, G.C.; D.S. Greenaway and E.A. WarmanThe 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.Item 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. WarmanAn 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.Item ON CONSTRUCTING INTERACTIVE GRAPHICS SYSTEMS(The Eurographics Association, 1982) Hanusa, Henning; Kuhlmann, Herbert W.; Pfaff, Günther E.; D.S. Greenaway and E.A. WarmanAbstract: 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.Item An Approach for CAD-System Simulation(Blackwell Publishing Ltd and the Eurographics Association, 1982) EncarnacaTo, J.The paper describes an approach for the technical evaluation and economic justification of CAD systems based on a CAD system simulation. The underlying model, the tools needed and the simulation concept used are discussed in detail. An extensive bibliography complements the concepts presented in the paper.Item News(Blackwell Publishing Ltd and the Eurographics Association, 1982) ten Hagen, P.Item A COMPUTER GRAPHICS PACKAGE FOR TEACHING CRYSTAL MORPHOLOGY(The Eurographics Association, 1982) Angell, Ian O.; Moore, Moreton; D.S. Greenaway and E.A. WarmanItem 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. WarmanItem News(Blackwell Publishing Ltd and the Eurographics Association, 1982)Item INTERACTIVE GENERATION OF 3-DIMENSIONAL COMPUTER GRAPHICS(The Eurographics Association, 1982) Sutty, George J.; D.S. Greenaway and E.A. WarmanA 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.Item 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.