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  • Modelling and Programming Evolutions of Surfaces 

    Chen, X.; Lienhardt, P. (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 ...
  • A Cooperative Architecture for Hypermedia Editing - CoMEdiA 

    Santos, Adelino (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 

    Highfield, Julian C.; Bez, Helmut E. (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 ...
  • Representing Conics using NURBS of Degree Two* 

    Qin, Kaihuai; Sun, Jiaguang; Wang, Xuefu (Blackwell Science Ltd and the Eurographics Association, 1992)
    In this paper, a new method is presented for representing conics precisely using NURBS of degree two. The method requires only four control vertices to represent a full circle using the full circumscribing square-based ...
  • An Efficient Adaptive Algorithm for Constructing the Convex Differences Tree of a Simple Polygon 

    Rappoport, Ari (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 

    Day, J. D. (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? 

    Bowen, Jonathan P. (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 ...
  • Performance of Space Subdivision Techniques in Ray Tracing 

    McNeill, M. D. J.; Shah, B. C.; Hebert, M.-P.; Lister, P. F.; Grimsdale, R. L. (Blackwell Science Ltd and the Eurographics Association, 1992)
    Whilst providing images of excellent quality, ray tracing is a computationally intensive task. The first part of this paper compares the speed-up achieved in ray tracing using various space subdivision algorithms and ...
  • Combined Direct and Inverse Kinematic Control for Articulated Figure Motion Editing 

    Boulic, Ronan; Thalmann, Daniel (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 

    Gervautz, Michael (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 ...
  • Simulation of Facial Muscle Actions Based on Rational Free Form Deformations 

    Kalra, Prem; Mangili, Angelo; Thalmann, Nadia Magnenat; Thalmann, Daniel (Blackwell Science Ltd and the Eurographics Association, 1992)
    This paper describes interactive facilities for simulating abstract muscle actions using Rational Free Form Deformations (RFFD). The particular muscle action is simulated as the displacement of the control points of the ...
  • HAGI, a High-level Application/Graphics Interface 

    Hsu, Y. H.; Kuo, Y. S. (Blackwell Science Ltd and the Eurographics Association, 1992)
    HAGI is an object-oriented graphics system developed on top of the X window system. In addition to providing facilities that structured graphics systems such as GKS usually have, HAGI supports a high- level graphics paradigm ...
  • An Object-Oriented View of the User Interface 

    Zhou, Tom Z.-Y.; Kubitz, William J. (Blackwell Science Ltd and the Eurographics Association, 1992)
    The object-oriented view of the user interface presented here is a model of object responsibilities-sharing and cooperation for a typical user interface. The model regards the user interface as a three-layer architecture, ...
  • SX/Tools - An Open Design Environment for Adaptable Multimedia User Interfaces 

    Kuhme, Thomas; Schneider-Hufschmidt, Matthias (Blackwell Science Ltd and the Eurographics Association, 1992)
    In this paper a brief review of user interface management systems (UIMSs) and their advantages is given. Shortcomings of current UIMSs and open requirements imposed by industrial application areas are outlined. Among the ...
  • Rendering NURB Regions For 2D Animation 

    Willis, Philip; Oddy, Robert (Blackwell Science Ltd and the Eurographics Association, 1992)
    We describe an accurate method of rendering by scan-conversion of closed regions bounded by NURBs, with particular comments on its application to computer-based 2D animation. It is shown that the method is fast, analytically ...
  • Interactive Shape Control of Interpolating B-splines 

    Krokos, M. A.; Slater, M. (Blackwell Science Ltd and the Eurographics Association, 1992)
    This paper presents a new methodfor providing interactive shape control of interpolating B-splines. The CAD designer can directly interact with geometric entities defined on the B-spline at any interpolated data point- ...
  • Fractals and Solid Modeling 

    Groller, Eduard (Blackwell Science Ltd and the Eurographics Association, 1992)
    Trying to combine fractal geometry and solid modeling seems to be a contradiction in itself, In this paper a new type of 3D objects is presented that accomplishes this combination in a specific way. Objects with a fractal ...
  • A Simple Description of Complex Curves 

    Bouras, A.; Shariat, B.; Vandorpe, D. (Blackwell Science Ltd and the Eurographics Association, 1992)
    In this paper, we propose a method of complex curves description, based on the use of standard primitives (curve arcs), inscribed in including boxes. This method simplifies the creation steps (curves are not defined with ...
  • Normal orientation methods for 3D offset curves, sweep surfaces and skinning 

    Siltanen, Pekka; Woodward, Charles (Blackwell Science Ltd and the Eurographics Association, 1992)
    Computing an offset curve to a 3D curve involves the basic problem of normal orientation in space. The same thing is encountered when interpolating surfaces with 3D sweep or skinning methods. Different methods for normal ...
  • Modeling with Time and Events in Computer Animation 

    Kalra, Devendra; Barr, Alan H. (Blackwell Science Ltd and the Eurographics Association, 1992)
    In this paper, we present a general, systematic and consistent treatment of time and events for computer animation. We first formalize the concepts of events and create a time primitive called an event unit. We then present ...

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