Now showing items 1-20 of 41

    • 3D Computational Morphology 

      Veltkamp, Remco C. (Blackwell Science Ltd and the Eurographics Association, 1993)
      Computational Morphology is the analysis of form by computational means. This discipline typically uses techniques from Computational Geometry and Computer Aided Geometric Design. The present paper is more specifically ...
    • Parallel 3D Delaunay Triangulation 

      Cignoni, P.; Montani, C.; Perego, R.; Scopigno, R. (Blackwell Science Ltd and the Eurographics Association, 1993)
    • Introducing blending operations in feature models 

      Laakko, Timo; Mantyla, Martti (Blackwell Science Ltd and the Eurographics Association, 1993)
      We describe the implementation of a blending facility in the context of a feature modelling system where solid and feature-based modelling operations can be utilized in parallel during the design process of a part. The ...
    • A Dynamic Gesture Language and Graphical Feedback for Interaction in a 3D User Interface 

      Bordegoni, Monica; Hemmje, Matthias (Blackwell Science Ltd and the Eurographics Association, 1993)
      In user interfaces of modern systems, users get the impression of directly interacting with application objects. In 3D based user interfaces, novel input devices, like hand and force input devices, are being introduced. ...
    • Boolean Operations and Spatial Complexity of Face Octrees. 

      Pla-Garcia, Nuria (Blackwell Science Ltd and the Eurographics Association, 1993)
      Most of the existing representation schemes of free form surfaces or objects with free form boundary are not capable to compute efficiently boolean operations and other usual geometric interrogations. Classical octrees, ...
    • Updating Polygonizations* 

      Abellanas, M.; Garcia, J.; Hernbandez, G.; Hurtado, F.; Serra, O.; Urrutia, J. (Blackwell Science Ltd and the Eurographics Association, 1993)
      In this paper we consider polygonizations that are robust when faced with changes in the vertices that are present or in their position. We analyze the dynamic maintenance of different types of polygonizations (monotone, ...
    • Form Factor Calculation: a New Expression with Implementations on a Parallel T.Node Computer 

      Michelin, Sylvain; Maffeis, Gualtiero; Arques, Didier; Grossetie, Jean Claude (Blackwell Science Ltd and the Eurographics Association, 1993)
      The radiosity technique uses the heat transfer theory to define a view-independent illumination model. For complex scenes, calculation of this model is very time-intensive, due largely to the determination of a geometric ...
    • Nonsplitting Macro Patches for Implicit Cubic Spline Surfaces 

      Guo, B. (Blackwell Science Ltd and the Eurographics Association, 1993)
      Macro patches are important for generating quadric or cubic implicit spline surfaces from the input of a polyhedron. All existing macro patches split the triangular facets of the polyhedron- this paper presents cubic ...
    • An Integral Geometry Based Method for Fast Form-Factor Computation 

      Sbert, Mateu (Blackwell Science Ltd and the Eurographics Association, 1993)
      Monte Carlo techniques have been widely used in rendering algorithms for local integration. For example, to compute the contribution of a patch to the luminance of another. In the present paper we propose an algorithm based ...
    • Scale-Invariant Minimum-Cost Curves: Fair and Robust Design Implements 

      Moreton, Henry P.; Sequin, Carlo H. (Blackwell Science Ltd and the Eurographics Association, 1993)
      Four functionals for the computation of minimum cost curves are compared. Minimization of these functionals result in the widely studied Minimum Energy Curve (MEC), the recently introduced Minimum Variation Curve (MVC), ...
    • Verve 

      Knittel, Gunter (Blackwell Science Ltd and the Eurographics Association, 1993)
      The design principles of a hardware acceleratorfor volume rendering are described. The architecture represents a voxel subsystem which interfaces easily to any existing workstation. Host requirements are low since it ...
    • A Prototype of a Cooperative Visualization Workplace for the Aerodynamicist 

      Pagendarm, H.-G.; Walter, B. (Blackwell Science Ltd and the Eurographics Association, 1993)
      Several feasibility studies for cooperative visualization were performed based on an existing modular visualization system. Two different architectures for the implementation of a cooperative system were identified, ...
    • Quality Control of an Interpolation Method for Discontinuous Parametric Surfaces 

      Seron, F.J.; Torrens, J.J; Magallon, J.A. (Blackwell Science Ltd and the Eurographics Association, 1993)
      In this paper we study a finite element interpolation method for fitting discontinuous parametric surfaces when the data points are the nodes of a curvilinear grid. Quality control of the interpolating surfaces is also ...
    • Variational Surface Design and Surface Interrogation 

      Hagen, H.; Hahmann, St.; Bonneau, G.-P. (Blackwell Science Ltd and the Eurographics Association, 1993)
      The generation of technical smooth surfaces from a mesh of three-dimensional data points is an important problem in geometric modelling. In this publication we give a survey of some new techniques based on a calculus of ...
    • DIGIS A Graphical User Interface Design Environment for Non-Programmers 

      de Bruin, Hans; Bouwman, Peter; van den Bos, Jan (Blackwell Science Ltd and the Eurographics Association, 1993)
      DIGIS (Direct Interactive Generation of Interactive Systems) is a graphical UI design environment for non-programmers that facilitates the design of all aspects of a UI with direct manipulation techniques. DIGIS is based ...
    • GKS-9x: Some Implementation Considerations 

      Damnjanovic, L.B.; Duce, D.A.; Robinson, S.K. (Blackwell Science Ltd and the Eurographics Association, 1993)
      The Graphical Kernel System (GKS) was published as an ISO standard for computer graphics programming in August 1985. GKS is now undergoing revision in ISO/IEC and at the time of writing the text of the Draft International ...
    • Direct 3D Manipulation Techniques for Interactive Constraint-based Solid Modelling 

      Fa, Mingxian; Fernando, Terrence; Dew, Peter M. (Blackwell Science Ltd and the Eurographics Association, 1993)
      This paper presents a novel constraint-based 3D manipulation approach to interactive constraint-based solid modelling. This approach employs a constraint recognition process to automatically recognise assembly relationships ...
    • A Declarative Design Method for 3D Scene Sketch Modeling 

      Donikian, Stephane; Hegron, Gerard (Blackwell Science Ltd and the Eurographics Association, 1993)
      In this paper, we present a dynamic model associated with an intelligent CAD system aiming at the modeling of an architectural scene sketch. Our design methodology has been developed to simulate the process of a user who ...
    • An Integrated System for Modeling, Animating and Rendering Hair 

      Daldegan, Agnes; Thalmann, Nadia Magnenat; Kurihara, Tsuneya; Thalmann, Daniel (Blackwell Science Ltd and the Eurographics Association, 1993)
      There are basically four problems to solve in order to produce realistic animated synthetic actors with hair: hair modeling and creation, hair motion, collision detection and hair rendering. This paper describes a complete ...
    • Modeling of Skylight and Rendering of Outdoor Scenes 

      Tadamura, Katsumi; Nakamae, Eihachiro; Kaneda, Kazufumi; Baba, Masashi; Yamashita, Hideo and Nishita, Tomoyuki (Blackwell Science Ltd and the Eurographics Association, 1993)
      Photorealistic animated images are extremely effective for pre-evaluating visual impact of city renewal and construction of tall buildings. In order to generate a photorealistic image not only the direct sunlight but also ...