Browsing Issue 4 by Issue Date

Now showing items 1-8 of 8

    • Animation using NURBS 

      Preston, M.; Hewitt, W. T. (Blackwell Science Ltd and the Eurographics Association, 1994)
      All animation, whether generated by pen or processor, is concerned with the changing behaviour of synthetic actors through time. Computer animation has allowed an animator to regard different actors as functionally equivalent ...

    • Animations to Represent Multivariate Data 

      Palamidese, P.; Crise, A. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Building animations is a current practice to study problems in the computational and experimental sciences. There are several classes of applications which generate descriptions of complex phenomena, based on a large variety ...

    • Ray Traversal of Spatial Structures 

      Kuzmin, Yevgeniy P. (Blackwell Science Ltd and the Eurographics Association, 1994)
      This article presents an efficient algorithm for ray traversal of uniform and hierarchical spatial structures. Only simple integer and logical operations are used. The problem of error accumulation during ray casting is ...

    • An All-integer Algorithm for Drawing Anti-aliased Straight Lines 

      Kui, Liu Yong (Blackwell Science Ltd and the Eurographics Association, 1994)
      An algorithm for drawing anti-aliased straight lines based on Bresenharn sline algorithm is presented in this paper. Only integer calculations are required. Multiplications or divisions are not needed (only simple ...

    • Computation of Offset Curves by the Huygens Principle 

      Mikheev, A.; Nozik, M.; Rubinstein, J. (Blackwell Science Ltd and the Eurographics Association, 1994)
      A new algorithm for computing offset curves is proposed. The algorithm is based on the Huygens principle for propagating wave-fronts. It automatically avoids the topological singularities that appear in conventional methods. ...

    • The Design and Specification of a Visual Language: An Example for Customising Geographic Information Systems Functionalities 

      Paterna , F.; Campari, I.; Scopigno, R. (Blackwell Science Ltd and the Eurographics Association, 1994)
      In this paper the design of a visual program editor and its specification using formal grammars are discussed. We consider an environment to specify, analyse and execute visual programs for a Geographical Information System ...

    • Recovering a Smooth Boundary Representation from an Edge Quadtree and from a Face Octree 

      Pla-Garcia, N. (Blackwell Science Ltd and the Eurographics Association, 1994)
      The Face Octrees are a representation scheme which is very suitable to represent both smooth free form surfaces and solids with smooth boundary, as well as, to perform operations among them. However, the Face Octree ...

    • Deriving Spectral, Reflectance Functions of Computer-Simulated Object Colours 

      Schettini, R. (Blackwell Science Ltd and the Eurographics Association, 1994)
      A method is presented which, given the RGB values of a colour stimulus displayed on a given cathode ray tube (to which a CIE XYZ triple corresponds), makes it possible to find a spectral reflectance function characterizing ...