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Computer Graphics Tokyo, now in its fourth year, has established a world-wide reputation as an international technical conference, presenting work of high quality in the field of computer graphics. Each conference has been attended by a couple of thousand partiCipants from all over the world and tens of thousands have visited the exhibition. After strict peer review, 34 papers were accepted this year, of which about 40% were from the USA, 30% from Japan, 20% from Europe, and 10% from Canada. A good balance of papers on advanced research results, industrial/marketing surveys, and computer art technology has made Computer Graphics Tokyo an indispensable forum for researchers, engineers, and administrators working in this field. Computer graphics is a rapidly developing and expanding area and it is not easy to keep abreast of all the progress that has been made. This volume contains the proceedings of Computer Graphics Tokyo ´86 and provides the reader with a comprehensive survey of the state of the art in computer graphics. Computational geometry (Chapter 1) is one of the fastest growing areas in computer graphics. This is well recognized as the basis of shape modeling. After shapes are modeled, they are displayed for visual observation. Chapter 2 on rendering presents various novel methods and technological innovations for visualizing shapes. To make display systems more acces sible to users, rich visual interfaces and languages are being designed, as shown in Chapter 3. Visual data bases for sharing graphics-and image-data are handled in Chapter 4.

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1 Computational Geometry.- Localized Surface Interpolation Method for Irregular Meshes.- Environment for Fast Elaboration of Constructive Solid Geometry.- Interactive Solid Modeling in HutDesign.- Polygonal Subdivision of Parametric Surfaces.- Algorithms for Automatic Mould Division Design.- Geometry in Prolog.- On the Boundary of Digital Straight Line Segments.- 2 Rendering.- Soft Objects.- The Simulation of Natural Features Using Cone Tracing.- Shadows for Bump-Mapped Surfaces.- 3 Visual Interface and Languages.- Interaction with IBS: An Icon-Based System.- GEO: Graphics System with Editable Objects.- A Pixelated Design Medium.- A New Graphics User Interface for Accessing a Database.- 4 Visual Data Bases.- Solid Modeler with Assembly Representation Tables.- Visual Business Graphics Query Interface.- The Geo-Graph Simulation System: Towards Dynamic Use of a Geomatic Data Base.- 5 Computer Animation.- Integrating Key-Frame Animation and Algorithmic Animation of Articulated Bodies.- Molecular Shape Embedding in a Grid Stage: Modelling and Animation.- 6 Graphics Software/Hardware Architecture.- Dynamic Display of Heart Potential Images with Parallel Processing.- The Single Array Approach to Engineering and Maintenance of CAD Software.- The Integration of Computer Graphics and Image Processing Techniques for the Display and Manipulation of Geophysical Data.- Applications of the 4ž4 Determinant Method and the TRIANGLE PROCESSOR to Various Interference Problems.- Chpter 7 Mechanical and General Purpose CAD/CAM.- On Design of a Robot with Three Legs by Computer Graphics.- High Performance CAD System with Full Automatic Dimensioning and Multi-Modeling Features Based on Engineering Workstation.- VIRGO: A Computer-Aided Apparel Pattern-Making System.- Chapte 8 VLSI CAD/CAM.- Efficient Algorithms for Validating VLSI Design Database.- Format-Independent CAD Software for VLSI Mask Data Preparation.- NISC: Non-Iterative Silicon Compiler.- 9 Marketing and Business/Technical Trends.- Computer Animation around the World: A Marketing Oriented Overview of Industry Development and Direction.- Business Computer Graphics: Usage and Effectiveness.- Computer Graphics for Office Automation: A Case Study.- The Influence of CADD of Teaching Traditional Descriptive Geometry and Orthographic Projection.- Trends in Microcomputer-Based CAD in the USA.- Author Index.- Keywords Index.

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