Now showing items 1-20 of 44

    • Cross Scan Buffer and its Applications 

      Tanaka, Toshimitsu; Takahashi, Tokiichiro (Blackwell Science Ltd and the Eurographics Association, 1994)
      We propose the Cross Scanline Buffer which preserves the result of hidden surface removal as performed by the Cross Scanline Algorithm. The Cross Scan Buffer reduces image re-generation time and eliminates aliasing artifacts ...
    • A Robust and Consistent Algorithm for Intersecting Convex Polyhedra 

      Sugihara, Kokichi (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper presents a numerically robust and topologically consistent algorithm for intersecting convex polyhedra. This algorithm is new in the sense that the consistency issue is completely separated from the numerical ...
    • 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 ...
    • 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 ...
    • How to Render Frames and Influence People 

      Strothotte, Thomas; Preim, Bernhard; Raab, Andreas; Schumann, Jutta; Forsey, David R. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Rendering systems generally treat the production of images as an objective process governed by the laws of physics. However, perception and understanding on the part of viewers are subjective processes influenced by a ...
    • Computer Graphics System for Reproducing Three- Dimensional Shape from Idea Sketch 

      Akeo, Makoto; Hashimoto, Hiroshi; Kobayashi, Taisuke; Shibusawa, Tetsuo (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper describes the technical features and method of implementation of our designer support system which enables reproducing a three-dimensional shape from an idea sketch speedily and modifying the reproduced shape ...
    • The Mesh Propagation Algorithm for Isosurface Construction 

      Howic, C.T.; Blake, E.H. (Blackwell Science Ltd and the Eurographics Association, 1994)
      A new algorithm, Mesh Propagation, is presented for the generation of isosurfaces from three-dimensional discrete data sets. While producing the same surface mesh as that generated by a corrected Marching Cubes algorithm, ...
    • A Paradigm for the Robust Design of Algorithms for Geometric Modeling 

      Agrawal, Amitabh; Requicha, Aristides A. G. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Geometric modelers are becoming faster and more powerful, but they still suffer from reliability problems because of floating point errors. Previous work in the field of robust geometric modeling tends to be problem specific ...
    • 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 ...
    • Reducing The Latency In Head-Mounted Displays By A Novel Prediction Method Using Grey System Theory 

      Wu, Jiann-Rong; Ouhyoung, Ming (Blackwell Science Ltd and the Eurographics Association, 1994)
      In this paper we propose a novel prediction method for the head motion using Grey System theory, where a 6D tracker is attached to an HMD on a user s head in virtual reality applications. Our prediction method using Grey ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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: ...
    • 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 ...