Browsing Issue 3 by Issue Date

Now showing items 21-40 of 44

    • 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 ...

    • 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 ...

    • An Inexpensive BRDF Model for Physically-based Rendering 

      Schlick, Christophe (Blackwell Science Ltd and the Eurographics Association, 1994)
      A new BRDF model is presented which can be viewed as an kind of intermediary model between empirism and theory. Main results of physics are observed (energy conservation, reciprocity rule, microfacet theory) and numerous ...

    • Magicsphere: an insight tool for 3D data visualization 

      Cignoni, P.; Montani, C.; Scopigno, R. (Blackwell Science Ltd and the Eurographics Association, 1994)
      How to render very complex datasets, and yet maintain interactive response times, is a hot topic in computer graphics. The MagicSphere idea originated as a solution to this problem, but its potential goes much further than ...

    • 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 ...

    • An Integrated Line Tracking and Vectorization Algorithm 

      van Nieuwenhuizen, Peter R.; Kiewiet, Olaf; Bronsvoort, Willem F. (Blackwell Science Ltd and the Eurographics Association, 1994)
      A method is presented to compute a vector representation of an arbitrary line in a bi-level raster image The line may have varying line width and irregular borders. Furthermore, at line crossings and branches the user is ...

    • Improved Visualisation of Marine Data: Algae and Acid Rain 

      Day, A.M.; Turner, S.M.; Arnold, D.B. (Blackwell Science Ltd and the Eurographics Association, 1994)

    • Efficient self-collision detection on smoothly discretized surface animations using geometrical shape regularity 

      VOLINO, Pascal; THALMANN, Nadia Magnenat (Blackwell Science Ltd and the Eurographics Association, 1994)
      We present a new algorithm for detecting self-collisionson highly discretized moving polygonal surfaces. If is based on geometrical shape regularity properties that permit avoiding many useless collision tests. We use an ...

    • COMPUTER GRAPHICS AND REMOTE SENSING - A SYNTHESIS FOR ENVIRONMENTAL PLANNING AND CIVIL ENGINEERING 

      Graf, K.Ch.; Suter, M.; Hagger, J.; Nuesch, D. (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper presents efforts undertaken in the field of photo-realistic visualization of natural landscapes using digital elevation models (DEM) and images generated by remote sensing techniques. The remote sensing systems ...

    • 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 ...

    • Fast Dynamic Tessellation of Trimmed NURBS Surfaced1 

      Abi-Ezzi, Salim S.; Subramaniam, Srikanth (Blackwell Science Ltd and the Eurographics Association, 1994)
      Trimmed NURBS (non-uniform rational B-splines) surfaces are being increasingly used and standardized in geometric modeling applications. Fast graphical processing of trimmed NURBS at interactive speeds is absolutely essential ...

    • 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 ...

    • 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 ...

    • A Hand Control and Automatic Grasping System for Synthetic Actors 

      Sanso, Ramon Mas; Thalmann, Daniel (Blackwell Science Ltd and the Eurographics Association, 1994)
      In the computer animation field, the interest for grasping has appeared with the development of synthetic actors. Based on a grasp taxonomy, we propose a completely automatic grasping system for synthetic actors. In ...

    • 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 ...

    • Raycasting of Nonregularly Structured Volume Data 

      Fruhauf, Thomas (Blackwell Science Ltd and the Eurographics Association, 1994)
      Raycasting is an efficient, but computation-intensive technique for the direct rendering of volumetric data. Nonregularly structured volume data is produced in a variety of applications, such as numerical simulation, ...

    • PREMO - An Initial Approach to a Formal Definition 

      DUCE, D.A.; DUKE, D.J.; ten HAGEN, P.J.W.; REYNOLDS, G.J. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Many descriptions of multimedia programming systems are starting to appear in the literature, but little work has yet been done on how to formally specify and reason about such systems. This paper is a contribution on the ...

    • A Method for Displaying Metaballs by using Bezier Clipping 

      Nishita, Tomoyuki; Nakamae, Eihachiro (Blackwell Science Ltd and the Eurographics Association, 1994)
      For rendering curved surfaces, one of the most popular techniques is metaballs, an implicit model based on isosurfaces of potential fields. This technique is suitable for deformable objects and CSG model.For rendering ...

    • Implementing RenderMan - Practice, Problems and Enhancements 

      Slusallek, Philipp; Pflaum, Thomas; Seidel, Hans-Peter (Blackwell Science Ltd and the Eurographics Association, 1994)
      The RenderMan interface has been proposed as a general interface to rendering systems, yet only a few implementations of the interface exist. In this paper we describe the implementation of the RenderMan interface on a ...

    • 3D Visualization for 2D GIS: an Analysis of the Users Needs and a Review of Techniques* 

      Giertsen, Christopher; Lucas, Anne (Blackwell Science Ltd and the Eurographics Association, 1994)
      Most of the existing geographical information systems (GIS) make limited use of algorithms for advanced computer graphics and visualization. One explanation is that few attempts are made to identify the visualization needs ...