New Trends in Computer Graphics

New Trends in Computer Graphics contains a selection of research papers submitted to Computer Graphics International '88 (COl '88). COl '88 is the Official Annual Conference of the Computer Graphics Society. Since 1982, this conference ha~ been held in Tokyo. This year, it is taking place in Geneva, Switzerland. In 1989, it will be held in Leeds, U. K. , in 1990 in Singapore, in 1991 in U. S. A. and in 1992 in Montreal, Canada. Over 100 papers were submitted to CGI '88 and 61 papers were selected by the International Program Committee. Papers have been grouped into 6 chapters. The flrst chapter is dedicated to Computer Animation because it deals with all topics presented in the other chapters. Several animation systems are described as well as speciflc subjects like 3D character animation, quaternions and splines. The second chapter is dedicated to papers on Image Synthesis, il1 particular new shading models and new algorithms for ray tracing are presented. Chapter 3 presents several algorithms for geometric modeling and new techniques for the creation and manipulation of curves, surfaces and solids and their applications to CAD. In Chapter 4, an important topic is presented: the specification of graphics systems and images using l~nguages and user-interfaces. The last two chapters are devoted to applications in sciences, medicine, engineering, art and business.

1 Computer Animation.- Locating Sampling Points for Cubic Splines.- Design and Implementation of the Animation Language SOLAR.- AVENUE: An Integrated 3-D Animation System.- The Use of Quaternions for Animation, Modelling and Rendering.- Toward General Animation Control.- 3-D Facial Animation Using Image Samples.- Human Prototyping.- “Occursus Cum Novo”, Computer Animation by Ray Tracing in a Network.- 2 Image Synthesis.- A General Shading Model.- The H-Test, a Method of High Speed Interpolative Shading.- Synthetic Image Generation for Highly Defocused Scenes.- Particals: An Artistic Approach to Fuzzy Objects.- VOXAR: A Tridimensional Architecture for Fast Realistic Image Synthesis.- Image Generation with an Associative Processor Array.- A Strategy for Mapping Parallel Ray-Tracing into a Hypercube Multiprocessor System.- Parallel Space Tracing: An Experience on an iPSC Hypercube.- Ray-Traced View and Visual Transparent Quality of Double Transparent Objects.- Antialiasing for Ray Tracing Using CSG Modeling.- Image Warping Among Arbitrary Planar Shapes.- A Simple Method for Color Quantization: Octree Quantization.- 3 Geometric Modeling and CAD.- An Efficient Polygon Handling Technique in a CAAD Environment.- Volume and Surface Properties in CSG.- A Hierarchical Model for Spatial Stacking.- Set Operation Evaluation Using Boolean Octree.- Efficiency of Uniform Grids for Intersection Detection on Serial and Parallel Machines.- Adjacency Finding Algorithms in a Variable-Resolution Boundary Model.- On Triangulating Palm Polygons in Linear Time.- Vertical Scan-Conversion for Filling Purposes.- Field Functions for Implicit Surfaces.- A Cellular Array for Computing Bicubical B-Splines Coefficients.- New Results for the Smooth Connection Between Tensor Product Bezier Patches.- Three-Dimensional Shape Generation Based on Generalized Symmetry.- Geometric Modeling with Euclidean Constructions.- Using GT/CAPP to Enhance Product Data Exchange Standard — Key to CAD/CAM Integration.- 4 Graphics Systems and Languages.- Drawing Input Through Geometrical Constructions: Specification and Applications.- On the Construction of Constrained Circles, an Unified Approach.- A Model for Image Structuration.- An Object-Oriented Interface for Network-Based Image Processing.- Applying Direct Manipulation to Geometric Construction Systems.- Implementing a Definitive Notation for Interactive Graphics.- GRAFLOG: Programming with Interactive Graphics and PROLOG.- Modelling and Building Graphics Systems: GKS.- The Choice of a Graphics System; Standard, Emerging Standard or De-facto-Standard.- 5 Computer Graphics in Medicine and Sciences.- Molecular Graphics: A New Tool in Computer-Assisted Chemistry.- Molecular Graphics and Modeling on the PC.- MOPIC: An Advanced Molecule Rendering Program for Microcomputers.- Computer Graphics and Complex Ordinary Differential Equations.- Approximation of Missing Sections of CT-Image Sequences Using Binary Interpolation.- Computer Graphic Techniques Applied to Medical Image Analysis.- Three-Dimensional Reconstruction Procedure Using GKS Primitives and Software Transformations for Anatomical Studies of the Nervous System.- The Use of Three-Dimensional Dynamic and Kinematic Modelling in the Design of a Colonoscopy Simulator.- 6 Applications of Computer Graphics.- A Hierarchical Simulation Environment for VLSI.- 3-D Geometric Modelling in Design and Manufacturing of Furniture Parts.- Computer-Assisted Color Conversion.- Analysis of Urban Geographic Queries.- GQL: A Graphical Database Language Using Pattern Images.- Computer-Aided Sail Section Drawing.- The Effect of Format on Information Processing Using Graphics.- Development of an Integrated Computer Art System.- Improving the Programmability of Robotic Workcells.- Simulation and Teaching Techniques for Interactive Robot Programming: ROPSE.- Conference Committees.- Authors’ Addresses.