Now showing items 6-25 of 39

    • A CAD System for Color Design of a Car 

      Oshima, Tetsuya; Yuasa, Shinji; Sakanoshita, Ken-ichi; Ogata, Yoshinori (Blackwell Science Ltd and the Eurographics Association, 1992)
      We have developed a color CAD system which enables a color designer to evaluate and create body colors of a car on a graphic display and put this system into practical use. The system has three features- generating realistic ...
    • Composing Hierarchically Structured Images 

      Patterson, John W.; Cockton, Gilbert (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper begins by examining the classical raster-based composition model, establishing its weakness, and developing a new composition algebra based on line drawing. It then examines the role of composition in the ...
    • Computing Dynamic Changes to BSP Trees 

      Chrysanthou, Y.; Slater, M. (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper investigates a new method for dynamically changing Binary Space Partition (BSP) trees. A BSP tree representation of a 3D polygonal scene provides an ideal data structure for rapidly performing the hidden surface ...
    • A Development Environment for Constructing Graph-Based Editing Tools 

      Chen, M.; Townsend, P.; Wang, C.Y. (Blackwell Science Ltd and the Eurographics Association, 1992)
      Scientists and engineers use numerous kinds of graph notations to model various objects in the real world and their relationships in an abstract pictorial form. However, developing a specific graph editing tool for each ...
    • Equidistant Smoothing of Polyhedra with Arbitrary Topologies 

      Ma, Lizhuang; Liang, Youdong; Peng, Qunsheng (Blackwell Science Ltd and the Eurographics Association, 1992)
      Smoothing of polyhedron with arbitrary topology is an important issue in CAGD and CAD/CAM, but so far it is deemed to be difficult to smooth the complex corners of a polyhedron. In this paper, the concept of distance ...
    • Fast Generation and Surface Structuring Methods for Terrain and Other Natural Phenomena 

      Koh, Eng-Kiat; Hearn, D. D. (Blackwell Science Ltd and the Eurographics Association, 1992)
      Fractal geometry has proven to be a powerful tool for modeling natural phenomena. Using discrete approximations to fractional Brownian motion over a finite grid plane, computer graphics terrain-rendering algorithms are ...
    • 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 Functional Approach to the Visual Simulation of Gaseous Turbulence 

      Sakas, Georgios; Westermann, Rudiger (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper presents a functional method for the visual simulation of 2-D or 3-D turbulent gaseous motion by using time-varying fractals. The used function incorporates results from the"spectral theory of turbulence", thereby ...
    • The Graphical Translation of English Text into Signed English in the Hand Sign Translator System 

      Holden, E.J.; Roy, G.G. (Blackwell Science Ltd and the Eurographics Association, 1992)
      Signed English is a manual interpretation of English using fingerspelling and signs. A prototype of the Hand Sign Translator (HST) system was developed to graphically translate English into Signed English, using two-handed ...
    • 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 ...
    • The Input Model of Standard Graphics Systems Revisited by Formal Specification 

      Faconti, Giorgio P.; Zani, Nicola; Paterno , Fabio (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper describes the specification of an input model for graphics systems. The initial aim of the work reported in this paper was to revise the input model adopted by graphics standards by means of formal specification ...
    • 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- ...
    • A line clipping algorithm and its analysis 

      Krammer, Gergely (Blackwell Science Ltd and the Eurographics Association, 1992)
      One of the classical problems of Computer Graphics: line clipping against a rectangle is revisited. Coordinate raster refinement and some unusual forms of the parametric equation of the line are used to develop formulae ...
    • 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 ...
    • Modelling the Texture of Paint 

      Cockshott, Tunde; Patterson, John; England, David (Blackwell Science Ltd and the Eurographics Association, 1992)
    • 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 ...
    • 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, ...
    • An Open Model for Hypermedia and Its Application to Geographical Information Systems 

      Hall, W.; Simmons, D. (Blackwell Science Ltd and the Eurographics Association, 1992)
      This paper describes the design and implementation of a multimedia information management environment that is based on an open model for hypermedia. The model, known as Microcosm, is currently implemented in Microsoft ...
    • Pandora: An Experiment in Distributed Multimedia 

      King, Tony (Blackwell Science Ltd and the Eurographics Association, 1992)
      An experimental workstation is described which supports digital video and audio in a distributed environment, and which presents this functionality to the user through the medium of a video-extended implementation of the ...
    • The Parametric Differential Method: An Alternative to the Calculation of Form Factors 

      Baranoski, Gladimir V. Guimaraes (Blackwell Science Ltd and the Eurographics Association, 1992)
      The parametric differential method calculates the form factors without using approximations by polygons. Because of this it contributes to the improvement of the realism of the images synthesised through the radiosity ...