Browsing Volume 11 (1992) by Issue Date
Now showing items 1-20 of 61
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Survey of Continuities of Curves and Surfaces
(Blackwell Science Ltd and the Eurographics Association, 1992)This survey presents an overview to various types of continuity of curves and surfaces, in particular parametric (Cn), visual or geometric (Cn, Gn), Frenet frame (Fn), and tangent surface continuity (Tn), and discusses the ... -
User Interface Management Systems for Engineering Applications
(Blackwell Science Ltd and the Eurographics Association, 1992)Essential features of a User Interface Management System (UIMS) from the perspective of engineering applications user interface development are described. Three commercially available UIMS are validated against this set ... -
A Computer Model For Pinscreen Simulation: A New Animation Paradigm
(Blackwell Science Ltd and the Eurographics Association, 1992)Actual computer image and motion synthesis paradigms are presented in order to introduce a new computer animation paradigm that simulates the traditional pinscreen animation technique. Pinscreen is a very particular and ... -
A Graphic Programming Environment Based on KADMOS
(Blackwell Science Ltd and the Eurographics Association, 1992)In this paper the design and development of a graphic programming system to be relied on KA?MO? are described. The system architecture upresented together with the functionality of construction and manipulation of the ... -
Formal Specification in the Revision of GKS: An Illustrative Example
(Blackwell Science Ltd and the Eurographics Association, 1992)The first ISO/IEC standard for computer graphics, the Graphical Kernel System (GKS) was published in August 1985. In accordance with ISO/IEC procedures, GKS is now being reviewed and revised. This paper describes how formal ... -
Combined Direct and Inverse Kinematic Control for Articulated Figure Motion Editing
(Blackwell Science Ltd and the Eurographics Association, 1992)A new approach for the animation of articulated figures is presented. We propose a system of articulated motion design which offers a full combination of both direct and inverse kinematic control of the joint parameters. ... -
Consistent Schemes for Addressing Surfaces when Ray Tracing Transparent CSG Objects
(Blackwell Science Ltd and the Eurographics Association, 1992)Constructive Solid Geometry (CSG) defines the shape of objects, i.e. the inside and the outside regions of objects, but it does not define the material properties of the space in the interior of objects. The definition is ... -
Geometric and Group-theoretic Methods for Computer Graphic Studies of Islamic Symmetric Patterns
(Blackwell Science Ltd and the Eurographics Association, 1992)Over the last several years the authors have used computer graphics to generate, study and analyze more than 300 Islamic geometrical repeat patterns. These patterns offer a rich source for exploitation by artists and are ... -
Integer de Casteljau Algorithm for Rasterizing NURBS Curves
(Blackwell Science Ltd and the Eurographics Association, 1992)An integer version of the well-known de Casteljau algorithm of NURBS curves is presented here. The algorithm is used to render NURBS curves of any degree on a raster device by turning on pixels that are closest to the ... -
A Statistical Comparison of Two Hidden Surface Techniques: the Scan-line and Z-buffer Algorithms
(Blackwell Science Ltd and the Eurographics Association, 1992)This paper compares two image space hidden surface removal algorithms for polygonal scenes. These are the z-buffer and scan-line algorithms. There is first an overview of each algorithm, followed by a simulation experiment, ... -
Ray Coherence Between a Sphere and a Convex Polyhedron
(Blackwell Science Ltd and the Eurographics Association, 1992)Using the two ray coherence theorems of Ohta and Maekawa the computation time of ray tracing algorithms for scenes of spheres and convex polyhedra can be reduced considerably. This paper presents further theorems which, ... -
PHIFI: A PHIGS Interactive System for the Visualization of Scalar and Vector Fields
(Blackwell Science Ltd and the Eurographics Association, 1992)This paper describes the characteristics of PHIFI, an interactive system for the visualization of scalar and vector fields. PHIFI has been developed at the IAC where applications of the system have also been investigated. -
Ray Tracing and Graphics Standards
(Blackwell Science Ltd and the Eurographics Association, 1992)Existing standards for three-dimensional graphic representations are unable to produce any realistically shaded images (except PHIGS PLUS, which provides discrete shading only). Ray Tracing or Radiosity are not taken into ... -
The Fractal Nature of an Ecological Model
(Blackwell Science Ltd and the Eurographics Association, 1992)With the help of computer graphics, the chaotic behaviour of an ecological model in the complex plane has been investigated. Convergence maps that show multi-fractal characteristics (science) and beautiful patterns (art) ... -
Modelling and Programming Evolutions of Surfaces
(Blackwell Science Ltd and the Eurographics Association, 1992)In recent years, a lot of work has been done on modelling natural phenomena and simulating the evolution of natural objects. For instance, procedural methods have been developed for simulating corpuscular phenomena and ... -
An Efficient Adaptive Algorithm for Constructing the Convex Differences Tree of a Simple Polygon
(Blackwell Science Ltd and the Eurographics Association, 1992)The convex differences tree (CDT) representation of a simple polygon is useful in computer graphics, computer vision, computer aided design and robotics. The root of the tree contains the convex hull of the polygon and ... -
A New Two Dimensional Line Clipping Algorithm for Small Windows
(Blackwell Science Ltd and the Eurographics Association, 1992)A new algorithm for clipping lines against rectangular windows is described. It is suitable for computations in both object space (floating point arithmetic) and image space (integer arithmetic). The algorithm is compared ... -
X: Why Z?
(Blackwell Science Ltd and the Eurographics Association, 1992)Window management systems are now used extensively for user interfaces to computer systems. In particular, X11 has come to dominate the workstation market as a widely accepted industry standard on many different hardware ... -
A Cooperative Architecture for Hypermedia Editing - CoMEdiA
(Blackwell Science Ltd and the Eurographics Association, 1992)CoMEdiA is a cooperative hypermedia editing prototype, which enables co-authors to cooperatively produce hypermedia documents. It allows co-authors to communicate their ideas, drafts, guidelines, constraints, and annotations ... -
Hidden Surface Elimination on Parallel Processors
(Blackwell Science Ltd and the Eurographics Association, 1992)With the wide availability of general purpose parallel computers, there is a need to reconsider hidden surface elimination (HSE) algorithms with respect to parallel implementation. This paper considers MIMD parallel ...