Issue 3
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Item Algorithm for Clpping Arbitrary Polygons(Blackwell Publishing Ltd and the Eurographics Association, 1989) Andreev, Rumen D.Item An Annotated PHIGS Bibliography(Blackwell Publishing Ltd and the Eurographics Association, 1989) Howard, T.L.J.Item Calendar of Events(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item Call for Participation in the EUROGRAPHICS WORKING GROUP on COMPUTER GRAPHICS HARDWARE(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item Call for Participation in the EUROGRAPHICS WORKING GROUP on INTELLIGENT CAD(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item Call for Participation in the EUROGRAPHICS WORKING GROUP on RELATIONSHIPS BETWEEN IMAGE SYNTHESIS and ANALYSIS(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item Call for Participation in the EUROGRAPHICS WORKING GROUP on VISUALIZATION IN SCIENTIFIC COMPUTING(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item Computer Graphics and Computer-Aided Design Literature: A Keyword-Indexed Bibliography for the Year 1988.(Blackwell Publishing Ltd and the Eurographics Association, 1989) Owen, JonItem COMPUTER GRAPHICS PROFESSIONALS(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item EDITORIAL(Blackwell Publishing Ltd and the Eurographics Association, 1989) Arnold, David; de Ruiter, BehrItem EUROGRAPHICS '90(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item EUROGRAPHICS ASSOCIATION UK CHAPTER(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item EUROGRAPHICS UK Chapter(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item EUROGRAPHICS UK Chapter Conference CGM Demonstration(Blackwell Publishing Ltd and the Eurographics Association, 1989) Duce, D.A.Item Eurographics Workshop on Object Oriented Graphics(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item Eurographics Workshop Relation of Page Description Languages and Graphics Systems(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item Hidden Octree Node Removal as a Pipeline Process(Blackwell Publishing Ltd and the Eurographics Association, 1989) Heal, B.W.A processing pipeline solution to the generation and display of octree encoded 3-D objects is described. Particular emphasis is given to an algorithm which removes that part a of linear octree code which describes parts of the object which are invisible from a prescribed viewing position. The scope of the algorithm is restricted to viewing directions which are parallel to the Cartesian axes and to orthogonal projections. The algorithm is specifically designed to operate as a single stage within a pipeline of processes.Item LEONARDO - New Member Benefit for Members of Eurographics(Blackwell Publishing Ltd and the Eurographics Association, 1989)Item Migration of GKS/GKS-3D and PHIGS Discussed under the View of the Computer Graphics Reference Model(Blackwell Publishing Ltd and the Eurographics Association, 1989) Poller, Jochem; Noll, Stefan; Rix, JoachimThe Migration Problem of GKS-3D and PHIGS is discussed in this report under the view of the graphics reference model s description technique: the component and framework concept. Therefore the components of GKS-3D and PHIGS are defined. The common and different concepts are indicated and the mapping from PHIGS to GKS-3D and from GKS-3D to PHIGS is done. This mapping is performed only on the components which have been proved as a description technique suited for such purposes. The migration has two different aspects. One is the theoretical approach to prove that such a migration is possible. The other one is more practical. It gives guide-lines for the use of PHIGS and GKS-3D and shows under which circumstances both can be used together.Item Notes on the Mathematics of the PHIGS Viewing Pipeline(Blackwell Publishing Ltd and the Eurographics Association, 1989) Krammer, GergelyIt is well known that homogeneous linear matrix transformations of the projective space may be efficiently used for the representation and the execution of common geometrical transformations but the general class of such transformations include also matrices which may cause numerical problems by transforming certain finite geometrical objects to infinity Different methods have been developed for handling such cases and this paper presents a new one called UW clipping which is based on some interesting properties of projective transformations. Furthermore the paper introduces die concept of conic sectors as a generalisation to half-planes and halfspaces respectively, with the invariance property that such sectors are mapped onto other such sectors by projective transformations, and thus enable the transformation of clipping halfplanes and halfspaces. Finally the possibility of transforming die rectangular clipping box into the object space is investigated.