Now showing items 1-20 of 65

    • An Algorithm of hidden Surface Removal based on Frame-To- Frame Coherence 

      Tost, Daniele (Eurographics Association, 1991)
      Frame-to-frame coherence capitalizes on the continuity existing between successive frames in order to predict the visibility of the scene at a given instant on the basis of its visibility at the previous instant. It is ...
    • Animation of Landscapes Using Satellite Imagery 

      Geymayer, Barbara; Prantl, Manfred; Müller-Seelich, Heimo; Tabatabai, Behnam (Eurographics Association, 1991)
      The paper presents methods to animate synthetic landscapes. The modeling of the landscape, the interactive specification of the flight path and the simulation of an explosion are described. The landscape is visualized by ...
    • At Last an ISO C Binding of GKS 

      Bakker, Miente (Blackwell Science Ltd and the Eurographics Association, 1991)
      The C4 bindings of GKS1 and other semantic computer graphics standards like GKS-3D2 and PHIGS3 are long overdue. While GKS was completed in 1985 and GKS-3D2 (and PHIGS3) became an international standard in 1988, none of ...
    • Block Iterations in the Complex Plane 

      Szyszkowicz, Mieczyslaw (Blackwell Science Ltd and the Eurographics Association, 1991)
      In this note we propose a new technique for execution of the feedback process z ? z2+ c. The presented method is used to discover a family of sets in the complex plane.
    • C 2 Gregory patch 

      Miuraa, Kenjiro Takai; Wangb, Kuo-King (Eurographics Association, 1991)
      G² continuity of free-form surfaces is sometimes very important in engineering applications. The conditions for G2 continuity between two Bezier patches has been studied and methods developed to ensure such continuity. ...
    • Cartographic Algorithms: Problems of Implementation and Evaluation and the Impact of Digitising Errors 

      Visvalingam, M.; Whyatt, J.D. (Blackwell Science Ltd and the Eurographics Association, 1991)
      Cartographic generalisation remains one of the outstanding challenges in digital cartography and Geographical Information Systems (GIS). It is generally assumed that computerisation will lead to the removal of spurious ...
    • Classification of Quad-encoding Techniques 

      Hunter, Andrew; Willis, Philip (Blackwell Science Ltd and the Eurographics Association, 1991)
      Many quad encoding technique have been published previously, using a variety of approaches to the different facets of quad storage, representation and manipulation. We review the major classes and identify three parameters ...
    • Colour Illustrations 

      - (Eurographics Association, 1991)
    • Combining Volume Rendering with Line and Surface Rendering 

      Frühauf, Martin (Eurographics Association, 1991)
      Volume data is discrete sampled data in the three-dimensional space. Volume rendering is defined as volume visualization directly from volume primitives and not via surface primitives. Geometric objects are represented as ...
    • Computational Physics : A Modeler - Simulator for animated physical Objects 

      Luciani, Annie; Jimenez, Stephane; Florens, Jean Loup; Cadoz, Claude; Raoult, Olivier (Eurographics Association, 1991)
      Physical modeling for animation is now firmly established. The present aim is to design and build a structured and well-defined tool rather than merely specific algorithms to simulate physical knowledge. We will first ...
    • Computer Art from Numerical Methods 

      Szyszkowicz, Mieczyslaw (Blackwell Science Ltd and the Eurographics Association, 1991)
      Zero-finding methods, Euler s method and the numerical algorithms elaborated as package subroutines are studied by using a computer graphics technique. The patterns obtained show chaotic behaviour (science) and beauty of ...
    • Configurable Representations in Feature-based Modelling 

      Falcidieno, B.; Giannini, F.; Porzia, C.; Spagnuolo, M. (Eurographics Association, 1991)
      A double description is proposed for the representation of a feature-based model which supports the distinction between form and functionality. This description consists of a primary representation in terms of geometric ...
    • A constraint-based UIMS using graph unification 

      Samuel, J. F. (Eurographics Association, 1991)
      This paper describes an experimental UIMS developed to investigate methods of combining and reusing objects within a constraint-based system. A novel approach based on graph-unification facilitated the definition of composite ...
    • Construction Techniques of Graphic, Direct-Manipulation User Interfaces 

      Preea, Wolfgang; Pornberger, Gustav; Sikora, Hermann (Eurographics Association, 1991)
      This paper deals with human-computer interaction in several ways. On the one hand it presents the roots of interactive, graphic user interfaces and how such interfaces are implemented on the abstraction level of programming ...
    • Constructive Cubes: CSG Evaluation For Display Using Discrete 3-D Scalar Data Sets 

      Breen, David E. (Eurographics Association, 1991)
      The algorithm presented in this paper converts a CSG model into a representation for interactive display on an engineering workstation. Called Constructive Cubes, the algorithm extends the standard CSG-point classification ...
    • Constructive Page Description Opening Up the Prepress World 

      Samara, Veronika; Wiedling, Hans-Peter (Eurographics Association, 1991)
      Constructive Page Description (CPD) is an overall approach allowing different kinds of data to be exchanged between a variety of systems and manipulated in arbitrary system environments. Fully changeable pages, which keep ...
    • Continuation Methods for Approximating Isovalued Complex Surfaces 

      Zahlten, Cornelia; Jürgens, Hartmut (Eurographics Association, 1991)
      Basically there are two different approaches for rendering isovalued surfaces in 3D space: projection methods and surface reconstruction. We are discussing two algorithms of the second kind. Both use continuation methods ...
    • Control Points for Multivariate B-Spline Surfaces over Arbitrary Triangulations 

      Fong, Philip; Seidel, Hans-Peter (Blackwell Science Ltd and the Eurographics Association, 1991)
      This paper describes first results of a test implementation that implements the new multivariate B-splines as recently developed by Dahmen et al. 10for quadratics and cubics. The surface scheme is based on blending functions ...
    • A DDA Octree Traversal Algorithm for Ray Tracing 

      Sung, Kelvin (Eurographics Association, 1991)
      A spatial traversal algorithm for ray tracing that combines the memory efficiency of an octree and the traversal speed of a uniform voxel space is described. A new octree representation is proposed and an implementation ...
    • Declarative Graphics And Dynamic Interaction 

      Johnson, C.W.; Harrison, M.D. (Eurographics Association, 1991)
      First order logic provides a means of integrating the specification and prototyping of interactive systems. It can describe graphical images in a declarative and order independent manner. It supports the definition of ...