Volume 03 (1984)
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Item A Functional Approach to Picture Manipulation(Blackwell Publishing Ltd and the Eurographics Association, 1984) Arya, KA functional approach is used to investigate the creation and manipulation of pictures as hierarchical entities. A set of useful functions is designed and used in a series of illustrative examples written in the functional programming language HOPE. A functional animation system incorporating these ideas is then discussed.Item Report on the 7th Meeting of ISO/TC97/SC5/WG2 - Computer Graphics June 1984(Blackwell Publishing Ltd and the Eurographics Association, 1984) R Gallop, JItem EUROGRAPHICS 84 10-14 September 1984, Copenhagen, Denmark(Blackwell Publishing Ltd and the Eurographics Association, 1984)Item EDITORIAL(Blackwell Publishing Ltd and the Eurographics Association, 1984) Enderle, Gunter; Duce, DavidItem Report on the ANSC X3H3 Meeting at Carmel, Oct lst-5th ’84(Blackwell Publishing Ltd and the Eurographics Association, 1984) Arnold, D.B.Item Report on Dialogue Specification Tools(Blackwell Publishing Ltd and the Eurographics Association, 1984) Green, MarkIn this report we have presented some of the issues pertaining to the notations used in UIMSs. At the present time there are a small number of implemented UIMSs, so there is some experience to draw upon. This is the first workshop of this nature where there has been a significant number of participants with implementation experience. This experience seemed to raise more issues than it resolved. The conclusion that can be drawn from this is there is still a considerable amount of work to be done in notations for UIMSs.One of the major problems encountered by this working group was the inability to compare different UIMSs. The systems discussed in this group have been used to produce user interfaces for different application areas, with different interaction styles and requirements. This makes it very difficult to compare the ease of use (for the user interface designer), and the quality of the resulting user interface. This problem would be partially solved by constructing a standard set of user interface problems. Each of the UIMSs could be used to solve these problems, and the results used as a means of comparison. This set of problems could be viewed as a benchmark test for user interface management systems. Along with developing the problems, techniques for measuring ease of use and the quality of the user interface must also be developed.Item From the Secretary(Blackwell Publishing Ltd and the Eurographics Association, 1984)Item The Eurographics 84 Computer Art and Animation Competition(Blackwell Publishing Ltd and the Eurographics Association, 1984) Schoenhut, J; Contin, SItem Institutional Membership(Blackwell Publishing Ltd and the Eurographics Association, 1984) Watkins, H.Item Report on a Geometric Modelling Course(Blackwell Publishing Ltd and the Eurographics Association, 1984) Lastra, G. LeonItem GKS Implementations Overview Second Edition(Blackwell Publishing Ltd and the Eurographics Association, 1984) Enderle, GunterItem Seeheim Workshop on User Interface Management Systems First Report(Blackwell Publishing Ltd and the Eurographics Association, 1984) Enderle, G.Item EUROGRAPHICS ’85 at the Acropolis - Nice(Blackwell Publishing Ltd and the Eurographics Association, 1984)Item EUROGRAPHICS General Assembly(Blackwell Publishing Ltd and the Eurographics Association, 1984)Item Executive Committee Elections 1985(Blackwell Publishing Ltd and the Eurographics Association, 1984) Duce, D AItem GKS in Pascal(Blackwell Publishing Ltd and the Eurographics Association, 1984) Slater, M.The design of the Pascal interface to the Graphics Kernel System is discussed and illustrated. The principles underlying the binding are given and examples show how some of the major features of GKS will look in Pascal. The examples cover graphical output, setting primitive representation, graphical input and inquiries.Item The Specification and Implementation of GKS Application Software in ADA (R)(Blackwell Publishing Ltd and the Eurographics Association, 1984) Mac an Airchinnigh, MOne of the most important uses of (interactive) computer graphics is as one of the tools available to a User Interface Management System (UIMS) for a variety of user-computer environments (UCE). Typical UCEs in vogue are Programming Support Environments (PSE), Expert System Builders (ESB), Office Automation systems (OAS). This paper concentrates on the conceptual relationship that exists between the users on the one hand and computer systems on the other. Such relationships are to be seen in the context of specific application domains. The two standards, GKS and Ada, are chosen to be the background against which the argument for a Software Methodology based on the Abstract Data Type approach, is presented. This has significant implications for a GKS binding to Ada and the development of GKS application software written in Ada. A collection of colour models is considered in detail.Ada(R) is a registered trademark of the U.S. Government, Ada Joint Program Office.Item The Winchester Graphics System: A Technical Overview(Blackwell Publishing Ltd and the Eurographics Association, 1984) Heywood, T R; Galton, B N; Gillett, J; Morffew, A J; Quarendon, P; Todd, S J P; Wright, W VThis paper gives a technical overview of the Winchester Graphics System. It concentrates on the software system, and in particular, the use of a relational database (PRTV). The main use of the system is in scientific research and it has been used a great deal in Chemistry, Biophysics and related sciences. However, the facilities are general and the same system is used for quite different applications. such as engineering and archaeology. This database has been found to provide researchers with a powerful flexible tool and has helped the UKSC to provide an environment where new ideas can be proposed and evaluated quickly and easily.Item An Algorithm for Determining the Intersection of Two Simple Polyhedra(Blackwell Publishing Ltd and the Eurographics Association, 1984) Szilvasi-Nagy, M.An algorithm is presented for the construction of the intersection of two simple possibly non-convex polyhedra. The methods of descriptive geometry are applied, so that this three-dimensional problem can be solved in two dimensions.We have to find all intersections of the edges of each polyhedron with the faces of the other, and these points of intersection can be found in Monge’s model. Projecting both polyhedra on the xy and on the xz coordinate planes we obtain two superimposed maps in both projections. The algorithm to find the intersection of two maps is based upon the Shamos-Hoey, the Bentley-Ottmann and the Nievergelt-Preparata algorithms. The asymptotic time requirement for determining the polygon of intersection of two polyhedra is O((N + S)log N), where N is the sum of the numbers of vertices of the two polyhedra and S is the total number of intersections of all projected edges in the xy-plane (S = O(N2)).Item EUROGRAPHICS Application Form for Institutional Membership(Blackwell Publishing Ltd and the Eurographics Association, 1984) Watkins, H.