EG1994: Recent submissions

Now showing items 21-40 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. ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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: ...

    • 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, ...

    • Designing and Implementing a Grid-Distortion Mapping Based on Variational Principles 

      Arad, Nur (Blackwell Science Ltd and the Eurographics Association, 1994)
      A grid-distortion mapping based on variational principles is described. The mapping is first defined between any two equivalent regular grids with minor geometric restrictions, and is then optimally extended to the interior ...

    • 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 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 ...

    • Parallel ray tracing based upon a multilevel topological knowledge acquisition of the scene 

      RIS, Philippe; ARQUES, Didier (Blackwell Science Ltd and the Eurographics Association, 1994)
      Including the standard parallelization by grouping primary rays, this paper presents a new parallel ray-timing method based upon a topological knowledge acquisition of the scene. This topological knowledge focuses on ...

    • 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 ...

    • 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 ...

    • Real Time Fitting of Hand-Sketched Pressure Brushstrokes 

      Pudet, Thierry (Blackwell Science Ltd and the Eurographics Association, 1994)
      A method is described for fitting the outline of hand-sketched pressure brushstrokes with Bezier curves. It combines the brush-trajectory model, in which a stroke is generated by dragging a brush along a given trajectory, ...

    • Beyond WYSIWYG: Display of Hidden Information in Graphics Editors 

      Schleich, R.; Durst, M.J. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Graphics editors such as computer aided design systems are complex and difficult to use. We attribute this to the fact that only a small part of the information is visible and therefore accessible and understandable. Only ...

    • 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 ...

    • AGRELs and BIPs: Metamorphosis as a Bezier curve in the space of polyhedra 

      Rossignac, Jarek; Kaul, Anil (Blackwell Science Ltd and the Eurographics Association, 1994)
      The metamorphosis between two user-specified objects offers an intuitive metaphor for designing animations of deforming shapes. We present a new technique for interactively editing such deformations and for animating them ...

    • 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 ...

    • 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 ...

    • Chebyshev Polynomials for Boxing and Intersections of Parametric Curves and Surfaces 

      Fournier, Alain; Buchanan, John (Blackwell Science Ltd and the Eurographics Association, 1994)
      Parametric curves and surfaces are powerful and popular modelling tools in Computer Graphics and Computer Aided Design. Ray-tracing is a versatile and popular rendering technique. There is therefore a strong incentive in ...