Now showing items 21-40 of 41

    • Outline Phase Control for Character Rasterization 

      Hersch, R. D. (Eurographics Association, 1988)
      Character rasterization on middle-resolution output devices (screens, laser printers) is one of the most difficult tasks in the domain of resolution-independent raster imaging. Low sampling leads to unacceptable low-quality ...
    • Fast Algorithm for Polygon Clipping with 3D Windows 

      Burkert, Andreas; Noll, Stefan (Eurographics Association, 1988)
      Many applications which use 3D graphics, need 3D geometric modeling and hence polygon clipping against 3D Windows or general volumes. The disadvantages of existing clipping algorithms are that they are 2D, slow or produce ...
    • Experimenting with a Parallel Ray-Tracing Algorithm on a Hypercube Machine 

      Priol, Thierry; Bouatouch, Kadi (Eurographics Association, 1988)
      A parallel space tracing algorithm is presented. It subdivides the scene into regions. These latter are distributed among the processors of an iPSC hypercube machine designed by Intel company. Each processor subdivides its ...
    • An Evaluation of CSG Trees Based on Polyhedral Solids 

      Badouel, Didier; Hegron, Gerard (Eurographics Association, 1988)
      Set operation on polyhedra is an important component of Geometric Modeling System (GMS) when a Constructive Solid Geometry (CSG) representation with polyhedral solid primitives is used. Output data will be the unique ...
    • The Calculus of the Non-Exact Perspective Projection - Scene-Shifting for Computer Animation 

      Hofmann, Georg Rainer (Eurographics Association, 1988)
      This paper shows the principle way to apply the, scene-shiftin technique of the classical film to computer animation. calculus is presented which is a modification of the well-known classical calculus of the perspective ...
    • A Method for Providing Full Interactive Control of the Shape of 3-D Curves and Surfaces 

      Cros, Frederic; Brock, Philip J. (Eurographics Association, 1988)
      This paper presents a new method for providing an interactive local control on 3-D curves and surfaces. The possibility of interacting directly on the vector tangent to the curve at each control point (e.g. changing its ...
    • Optimal Texture Mapping 

      De Ma, Song; Lin, Hong (Eurographics Association, 1988)
      Texture mapping is one of the most important techniques for highquality image synthesis. It can enhance immensely the visual richness of raster-scan images. We address in this paper the problem of mapping planar texture ...
    • Efficient Adaptive Subdivision of Bezier Surfaces 

      Clay, Reed D.; Moreton, Henry P. (Eurographics Association, 1988)
      The support of free-form surfaces by modem solid modeling systems has necessitated the development of hardware and algorithms for the interactive display of surface patches. This paper describes an algorithm for the display ...
    • Monte-Carlo Integration Applied to an Illumination Model 

      Bouville, C.; Dubois, J.L.; Marchal, I.; Viaud, M.L. (Eurographics Association, 1988)
      The use of Monte-Carlo integration together with stochastic sampling is very useful for dealing with the scattering phenomena that occur in the propagation and reflection of light. In this paper, these techniques have been ...
    • Form-Factors for General Environments 

      Shao, Ping-Pine; Peng, Qun-Sheng; Liang, You-Done (Eurographics Association, 1988)
      A new algorithm, based on the hemi-cube formulation, which calculates the form-factors required by the solution of the rendering equation, is presented. The concept of form-factors of the standard radiosity method is ...
    • Pseudo Ordering of CSG-Trees 

      Cottingham, Marion S. (Eurographics Association, 1988)
      Using Constructive Solid Geometry (CSG) methods, it is usual for primitive object representations to be stored at the leaf nodes of binary trees. The major part of the work involved in generating an image of the object is ...
    • Fractal Approximation of 2-D Object 

      Levy-Vehel, J.; Gagalowicz, A. (Eurographics Association, 1988)
      We present some new techniques for shape approximation with fractals, using Iterated Function System, a powerful method which allows good control on the resulting fractal. The main point discussed here can be stated as ...
    • Animation of Stochastic Model-Based 3-D Textures 

      Gagalowicz, Andre; Ma, Song D. (Eurographics Association, 1988)
      We have previously shown the validity of a statistical model proposed by us for realistic textures. We have also shown how to use this model to map realistic textures onto a still surface of any shape and extent, maintaining ...
    • A Simple Spectral Approach to Stochastic Modelling for Natural Objects 

      Anjyo, Ken-ichi (Eurographics Association, 1988)
      Stochastic modeling has been widely used in computer graphics to depict natural objects or phenomena. Various techniques are available, depending on what object is to be represented and what extent of realism to be achieved. ...
    • An Expert System for Polyhedra Modelling 

      Martin, Philippe; Martin, Dominique (Eurographics Association, 1988)
      Very often we wish to construct shapes according to some criteria, which are properties we want the object to possess. In this case explicit construction becomes an inadapted way of working. One would wish to obtain the ...
    • Towards a System for Exploring the Universe of Polyhedral Shapes 

      Colin, Christian (Eurographics Association, 1988)
      It is often easier to model a shape by giving its properties rather than describing it explicitly. Thus, we are interested in methods which allow us to create shapes automatically by only giving a set of properties. We ...
    • A System for Graphical Interaction on Parametrized Models 

      Van Emmerik , Maarten J.G.M. (Eurographics Association, 1988)
      A system that enables the definition of parametrized solid models by means of graphical interaction is presented. The position, orientation and dimensions of primitive volumes for Constructive Solid Geometry (CSG) are ...
    • G1 Smoothing Solid Objects by Bicubic Bezier Patches 

      Liang, Youdong; Ye, Xiuzi; Fang, Shiaofen (Eurographics Association, 1988)
      A general and unified method is presented for generating a wide range of 3D objects by smoothing the vertices and edges of a given polyhedron with arbitrary topology using bicubic Bezier patches. The common solution to the ...
    • Boundary to Constructive Solid Geometry: A Step Towards 3D Conversion 

      Juan, R. (Eurographics Association, 1988)
      Several solid representation schemes exist today in solid modeling. As none of them has properties that are uniformly better than any other, the need for modeling systems working on two or more different schemes which ...
    • An Object-Oriented Approach to Process Monitoring 

      Hütter, Ronald (Eurographics Association, 1988)
      Current and future user interface requirements of process monitoring applications are summarized. An object-oriented approach to meet these requirements is described. A special displayfile structure, the socalled object-oriented ...