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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 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 A Delaunay-Based Method for Surface Approximation(The Eurographics Association, 1983) Floriani, L.De; Falcidieno, B.; C.Pienovi,; P.J.W. ten HagenThis paper describes a method for constructing a surface representation model from a given set of data points.A Triangulated Irregular. Network has been chosen as data structure, thus representing the surface as a set of contiguous non -overlapping and irregurarly shaped triangular facets.The proposed method makes use of a Delaunay triangular grid adapted to non-convex domains. Using only representative subsets of the given set of points, the method allows the construction of approximating surfaces which rest within a predefined tolerance.Item GKS-300 - PASCAL Implementation of the Graphical Kernel System (GKS) on a Minicomputer Based Graphical Workstation(The Eurographics Association, 1983) Schmitgen, Günther; P.J.W. ten HagenItem 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 Book Reviews(Blackwell Publishing Ltd and the Eurographics Association, 1983)Book reviewed in this article:Introduction to the Graphical Kernel System (GKS), F.R.A. Hopgood, D.A. Duce, J.R. Gallop and D.C. SutcliffeDatenbanksystem fur CAD-Arbietsplitze, W.E. FischerSmalltalk 80, the Language and its lmplementntion Addison-Wesley, 1983Item EUROGRAPHICS 84 10-14 September 1984, Copenhagen, Denmark(Blackwell Publishing Ltd and the Eurographics Association, 1984)Item Non-Rectangular Surface Patches Suitable for Inclusion in a B-Spline Surface(The Eurographics Association, 1983) Sabin, M.A.; P.J.W. ten HagenItem 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.