Browsing Issue 3 by Title

Now showing items 33-44 of 44

    • Selective Visualization of Vector Fields 

      van Walsum, Theo; Post, Frits H. (Blackwell Science Ltd and the Eurographics Association, 1994)
      In this paper, we present an approach to selective vector field visualization. This selective visualization approach consists of three stages: selectdon creation, selection processing and selective visualization mapping. ...

    • A Semantics-based Approach for the Design and Implementation of Interaction Objects 

      Paterno , F.; Leonardi, A. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Although tools for developing graphical user interfaces are becoming increasingly popular, they do not usually highlight precisely which key elements developers should take into account. This still entails considerable ...

    • Sketching 3D models with 2D interaction devices 

      Branco, Vasco; Costa, Antonio; Ferreira, F. Nunes (Blackwell Science Ltd and the Eurographics Association, 1994)
      The creation of a 3D shape using CAD tools, namely solid modelers, is difficult and time-consuming. Therefore, these systems are kept away from the conceptual phases of design, perhaps the most important in any product ...

    • Skylight for Interior Lighting Design 

      Dobashi, Yoshinori; Kaneda, Kazufumi; Nakashima, Takanobu; Yamashita, Hideo; Nishita, Tomoyuki and Tadamura, Kastumi (Blackwell Science Ltd and the Eurographics Association, 1994)
      It is inevitable for indoor lighting design to render a room lit by natural light, especially for an atelier or an indoor pool where there are many windows. This paper proposes a method for calculating the illuminance due ...

    • Solid Modeling Based on a New Paradigm 

      Yoshida, Norimasa; Shiokawa, Masato; Yamaguchi, Fujio (Blackwell Science Ltd and the Eurographics Association, 1994)
      The technique of solid modeling is essential in CAD/CAM applications, and is currently well established. However, problems remain, such as the lack of uniformity in geometric computations and the lack of stability of Boolean ...

    • Spectral Data Modeling for a Lighting Application 

      Deville, Pascal M.; Merzouk, Slimane; Cazier, Dorothee; Paul, Jean C. (Blackwell Science Ltd and the Eurographics Association, 1994)
      In computer graphics, image generation uses the RGB colorimetric system. However, this system does not produce an accurate simulation of the spectral characteristics of both light and material, due to the fact that it is ...

    • Towards Context- Dependent Interpolation of Digital Elevation Models 

      Dixon, A.R.; Kirby, G.H.; Wills, D.P.M. (Blackwell Science Ltd and the Eurographics Association, 1994)
      The fractional Brownian motion (fBm) model has become increasingly popular in recent years as a mechanism for the synthesis of many natural phenomena. Unfortunately, the required interdependence of neighbouring points over ...

    • Triangulating multiply-connected polygons: A simple, yet efficient algorithm. 

      Ronfard, Remi P.; Rossignac, Jarek R. (Blackwell Science Ltd and the Eurographics Association, 1994)
      We present a new, simple, yet efficient algorithm for triangulating multiply-connected polygons. The algorithm requires sorting only local concave minima (sags). The order in which triangles are created mimics a flooding ...

    • Variational Design and Fairing of Spline Surfaces 

      Greiner, Gunther (Blackwell Science Ltd and the Eurographics Association, 1994)
      Variational principles have become quite popular in the design of free form surfaces. Among others they are used for fairing purposes. The choice of the right fairness functional is a crucial step. There is always a ...

    • Vector Fields: an Interactive Tool for Animation, Modeling and Simulation with Physically Based 3D Particle Systems and Soft Objects 

      Hilton, Travis L.; Egbert, Parris K. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Vectorfields have traditionally been used in computer graphics as a means of visualizing models over time. This paper presents a system which extends the use of vector fields as an interactive tool for physically based ...

    • Visualization of Regular Polytopes in Three and Four Dimensions 

      Hausmann, Barbara; Seidel, Hans-Peter (Blackwell Science Ltd and the Eurographics Association, 1994)
      Nontrivial regular polytopes only exist in three and four dimensions. This paper describes a software package that allows to interactively visualize and analyze these regular polytopes. The following four tools are available: ...

    • Volume Rendering on Non-regular Grids 

      Tabatabai, Behnam; Sessarego, Emanuela A.; Mayer, Harald F. (Blackwell Science Ltd and the Eurographics Association, 1994)
      In this article we present the principle methods for volumerendering of non-regular grids as used in the Finite Element Method or the Method of Control Volumes. Besides linear element types, the methods discussed here also ...