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  • A Constraint-Based Reasoning Framework for Behavioural Animation 

    Mah, Sang; Calvert, Thomas W.; Havens, William (Blackwell Science Ltd and the Eurographics Association, 1994)
    Behaviour is a reflection of a reasoning process that must deal with constraints imposed by an external environment, internal knowledge and physical structure. This paper proposes a framework for behavioural animation that ...
  • Multiresolution Tiling 

    Meyers, David (Blackwell Science Ltd and the Eurographics Association, 1994)
    This paper describes an efficient method for constructing a tiling between a pair of planar contours. The problem is of interest in a number of domains, including medical imaging, biological research and geological ...
  • A Schematic Entry Drawing Capability in a Linearised Hypermedia System 

    Benest, I. D. (Blackwell Science Ltd and the Eurographics Association, 1994)
    This paper describes a linearised hypermedia system, called the Book Emulator, that generally supports the capture of diagrammatic specifications such as SSADM and electronic circuit diagrams, and the capture of mathematical ...
  • Contextual Animation of Gestural Commands 

    Kurtenbach, G.; Moran, T. P.; Buxton, W. (Blackwell Science Ltd and the Eurographics Association, 1994)
    Drawing a mark can be an efficient command input technique when using a pen-based computer. However, marks are not intrinsically self-explanatory as are other interactive techniques such as buttons and menus. We present ...
  • A New Real Time Geometric Transformation Matrix and its Efficient VLSI Implementation 

    Ng, C. M.; Bustard, D. W. (Blackwell Science Ltd and the Eurographics Association, 1994)
    The geometric transformation of an image with irregular shapes from a source space to a target space requires a huge number of multiplications and additions for each pixel. Such a through put is impossible to deliver by ...
  • 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 ...
  • 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. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 New Approach to the Construction of Surfaces from Contour Data 

    Jones, Mark W.; Chen, Min (Blackwell Science Ltd and the Eurographics Association, 1994)
    This paper presents a new approach to the construction of a surface from a stack of contour slices. Unlike most existing methods, this new approach handles ambiguous conditions consistently without employing an algorithm ...
  • Skylight for Interior Lighting Design 

    Dobashi, Yoshinori; Kaneda, Kazufumi; Nakashima, Takanobu; Yamashita, Hideo; Nishita, Tomoyuki and Tadamura, Kastumi (Blackwell Science Ltd and the Eurographics Association, 1994)
    It is inevitable for indoor lighting design to render a room lit by natural light, especially for an atelier or an indoor pool where there are many windows. This paper proposes a method for calculating the illuminance due ...
  • 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 ...
  • 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 ...
  • 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 ...

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