Volume 02 (1983)
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Item Report on the EEC Workshop on Certification of Graphics Software - Rixensart, Belgium October 1982(Blackwell Publishing Ltd and the Eurographics Association, 1983) Brodlie, K.W; Pfaff, G.E.Item ANNOUNCING EUROPE-S LARGEST COMPUTER GRAPHICS CONFERENCE(Blackwell Publishing Ltd and the Eurographics Association, 1983)Item An Algorithmic Interpretation of the GKS TEXT Primitive(Blackwell Publishing Ltd and the Eurographics Association, 1983) Brodlie, K W; Pfaff, G.Item Towards GKS Binding to PASCAL(The Eurographics Association, 1983) Antoy, Sergio; Dettori, Giuliana; P.J.W. ten HagenWhen binding GKS to the Pascal programming language some problems arise which are not trivial, Problems related to the use of a library, to the passing of array parameters to procedures and to the definition of suitable types for GKS data must be carefully discussed, since each of these does not have a unique solution, A proposal for solving the above problems is presented in this paper.Item A High Level Interface to the Graphical Kernel System - GKS(The Eurographics Association, 1983) Watkins, H.K.; P.J.W. ten HagenA Graphical Package is described with particular reference to the petroleum industry. One of its design aims is that it should act as a user interface to GKS and be as user friendly as possible. As a further design aim, it has to be capable of implementation as a stand-alone graphics package in situations where GKS is not. available. The implications of these design aims are outlined.Item Announcement General Assembly of the EUROGRAPHICS Association(Blackwell Publishing Ltd and the Eurographics Association, 1983)Item Implementation and Comparison of Different Presentation Layer Codings for Efficient Transfer of GKS Metafiles(Blackwell Publishing Ltd and the Eurographics Association, 1983) Duce, Dr D AItem Fast Access to Archival Information Stored on Optical Memory Discs(The Eurographics Association, 1983) Bittner, H.; Krömker, D.; Lenzer, R.; Olsowski, H.D.; P.J.W. ten HagenA database processor based on a multi-microprocessor system managing archival data was developed for the use in local area networks. To grant fast and easy access from office workstations to heterogeneous information stored on optical memory discs, a new strategy of storing data and handling user requests was designed.Item GKS-Implementations Overview and Inquiry(Blackwell Publishing Ltd and the Eurographics Association, 1983) Enderle, G.Item A Geometric Data Manager(The Eurographics Association, 1983) Tikkanen, M.; Mantyla, M.; Tamminen, M.; P.J.W. ten HagenGWB/DMS is the data management subsystem of GWB, the Geometric Work-Bench. I t has been designed specifically for three-dimensional computeraided design applications. As the data definition and manipulation take place with extensions of high-level language constructs, GWB/DMS offers a direct migration from an independent "in-core" application to one using a database. Besides, the user can define additional access paths using geometric or conventional indices. The interactive nature of design is taken into account by including a simple transaction control mechanism. Transparency in ordinary programming and efficiency are the main design criteria of GWB/DMS. Its novelties are: 1) geometric indices facilitating access by location, 2) address calculation as the main access method and 3) tools for controlling the "physical closeness" of database objects.Item XGKS - A Multitask Implementation of GKS(The Eurographics Association, 1983) Herman, I.; T.Tolnay-Knefely,; Vincze, A.; P.J.W. ten HagenA multitask design for GKS is presented, a realization aiming small computers and intelligent graphic hardware.Item High Level Language Support for 3-Dimensional Graphics(The Eurographics Association, 1983) Duhovnik, Joze; Kimura, Fumihiko; Sata, Toshio; P.J.W. ten HagenIn the paper the design process is analysed and a new model of the design process which is usefull in CAD is explained. At working a construction with the computer we have to consider the function and form. The function defines the capacity of the construction and the usefulness dependet on the connection machine-nature. With the form we define the possibility of manufacturing and usefulness dependet on the connection man-machine, For a successful working of the function and the form we use geometrical modelling and word processing, The interaction between man-computer can the most easily be done with sketching (form) and speech (words). In the paper the data input with sketching is explained using keyboard instead of speech. In the appendix an example of working the construction by our method is presented.Item The GHOST-80 Colour Raster Extensions(The Eurographics Association, 1983) Prior, W.A.J.; Sutherland, R.J.; P.J.W. ten HagenThe GHOST Graphical Output System has been developed over a long period. The most recent version, GHOST-80 has been enhanced with routines for colour raster displays. The integration of these routines with the existing package is described and their ease of use is emphasised.Item Geography Algorithms Project(Blackwell Publishing Ltd and the Eurographics Association, 1983) Milne, W JItem EUROGRAPHICS General Assembly(Blackwell Publishing Ltd and the Eurographics Association, 1983)Item THE GKS CONTROL BOARD(Blackwell Publishing Ltd and the Eurographics Association, 1983) Enderle, G.Item EUROGRAPHICS-83 Computer Art Competition(Blackwell Publishing Ltd and the Eurographics Association, 1983)Item Fast Previewing Techniques in Raster Graphics(The Eurographics Association, 1983) Jansen, F.W.; Wijk, J.J. van; P.J.W. ten HagenThe long processing times inherent in the use of raster graphics techniques for the shading of complex scenes, complicate the design and debugging of a picture. The efficiency of the picture-generating process can, however, be improved by adding several interactive facilities to the system. In particular, fast previewing techniques are valuable for checking the modeling and for getting a good impression in an early stage of the picture-definition process. A discussion of raster graphics system design is followed by examples of fast pre-viewing techniques for the shading and texture mapping of surface models and for the shading of solid models using a raycasting technique.Item Standard Graphics as a Geometric Modelling Device(The Eurographics Association, 1983) Takala, T.; P.J.W. ten HagenA view is taken on geometric modelling systems as abstract data types. Having this frame of reference, the Device Independent Segment Storage of standard graphics is considered, and found to possess useful capability of modelling. The unused potential can be benefit simply by adding a few new inquiry functions, which give the application program an access to the individual primitives stored in segments. Even more advantage can be got i f semantics other than just grouping of items can be assigned to the segments. For example, in 3D graphics, a group of polygons can be labeled to mean a solid. A flexible framework (AGX) is built for experiments, and the feasibility of the concepts presented here is demonstrated by practical applications.Item Elections(Blackwell Publishing Ltd and the Eurographics Association, 1983) Duce, D A