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Browsing Volume 06 (1987) by Title

Now showing items 77-96 of 114

    • Logical Input Devices and Interaction 

      van Liere, R.; ten Hagen, P. J. W. (Blackwell Publishing Ltd and the Eurographics Association, 1987)
      The logical input device model, as is adopted in the standardized graphics package GKS, has been an accepted basis for producing device-independent graphics systems. However, when used in highly interactive graphical ...

    • Making Drawings Talk: Pictures in Minds and Machines 

      Bijl, Aart (Blackwell Publishing Ltd and the Eurographics Association, 1987)
      Interactions between human minds and machine systems will be discussed, drawing on experience of CAD and focusing on modes of expression. Free forms of text and drawings pose deep questions when interpretations have to ...

    • A Means to Improve the GKS-3D/PHIGS Output Pipeline Implementation 

      Herman, Ivan; Reviczky, Janos (Eurographics Association, 1987)
      The output pipeline of GKS-3D/PHIGS isexamined to find some possible points where the implementation could be improved to raise efficiency while remaining strictly within the scope of the Standards. Some interesting results ...

    • A Metric for Computing Adaptive Detail in Animated Scenes Using Object-Oriented Programming 

      Blake, Edwin H. (Eurographics Association, 1987)
      A spatial metric for adapting the level of detail in a modelled object to achieve a convincing degree of realism on a display is formulated and illustrated with a simple implementation. This spatial metric is designed to ...

    • A New Algorithm for Contour-plotting 

      Brinkkernper, Sjaak; Hendriks, Harrie (Eurographics Association, 1987)
      A new algorithm for contour-plotting is introduced. The input function, tabulated or in a subroutine description, is approximated by an interpolation function. The contours of this approximating function are drawn piecewise ...

    • A New Algorithm of Space Tracing Using a CSG Model 

      Bouatouch, Kadi; Madani, M.O.; Priol, Thierry; Arnaldi, Bruno (Eurographics Association, 1987)
      This paper describes a new algorithm of space tracing. Scenes are modeled by a CSG tree. Space is subdivided regularly into 3D regions called boxes. With each box is associated a subtree which is the restriction of the ...

    • New Methods for Improving the GKS Fill Area Output Primitive 

      Herman, Ivan; Reviczky, Janos (Blackwell Publishing Ltd and the Eurographics Association, 1987)
      The fill area primitive is one of the most powerful primitives of GKS and its derivatives (GKS-3D, PHIGS etc.). Since its specrfication is extremely general, it is important to explore new approaches to achieve higher ...

    • A New Scan Line Algorithm for the Rendering of CGS Trees 

      Pueyo, Xavier; Mendoza, Joan Carles (Eurographics Association, 1987)
      A scan line algorithm is proposed to render CSG modelled solids. Scan planes intersections are obtained by means of a proposed generalisation of Porter’s algorithm. 2-D scan plane primitives are decomposed in a way that ...

    • Offers to EUROGRAPHICS Members 

      Unknown author (Blackwell Publishing Ltd and the Eurographics Association, 1987)

    • Offers to EUROGRAPHICS Members 

      Unknown author (Blackwell Publishing Ltd and the Eurographics Association, 1987)

    • Offers to EUROGRAPHICS Members 

      Unknown author (Blackwell Publishing Ltd and the Eurographics Association, 1987)

    • Offers to EUROGRAPMCS Members 

      Unknown author (Blackwell Publishing Ltd and the Eurographics Association, 1987)

    • Parallel Graphical Output from Dialogue Cells 

      Ten Hagen, P.J.W.; Schouten, H.J. (Eurographics Association, 1987)
      A system that accepts and processes graphical output from parallel processes using a single workstation, and its use in a User Interface Management System called Dialogue Cells, is described. It allows for a programmer to ...

    • Parallel Polygon Rendering with Precomputed Surface Patches 

      Theoharis, Theoharis; Page, Ian (Eurographics Association, 1987)
      We describe an algorithm for rendering a restricted class of trapeziums, and hence arbitrary polygons, in parallel on an NxN SIMD array processor. The algorithm achieves good performance by precomputing “surface patches” ...

    • Preserving the Area of Regions 

      Williams, Richard (Blackwell Publishing Ltd and the Eurographics Association, 1987)
      When regions are represented by their boundary, the number of points ((x, y) coordinate pairs) used to define the boundary can vary. Many more points are required to satisfactorily display a region at a detailed scale than ...

    • RasterCalc: Calculus for Operations on Graphics Colour Rasters 

      van den Bos, Jan (Blackwell Publishing Ltd and the Eurographics Association, 1987)
      An extended model and calculus, called RasterCalc, is presented for operations on discrete graphics rasters, including their colour functions. The operations are separated into two main categories: operations on domains, ...

    • Real-Time Scan-Line In-Fill 

      Allerton, D. J.; Evemy, J. D.; Zaluska, E. J. (Eurographics Association, 1987)
      A novel algorithm is described to perform in-fill of wire-frame polygons, typically for application in visual systems for flight simulation. Post-processing is performed on an image formed in a conventional raster-scan ...

    • The Reconstruction of Neurone Morphology from Thin Optical Sections - Graphical Aspects 

      Brown, A. D.; Wheal, H. V.; Stockley, E. W. (Eurographics Association, 1987)
      The aims of the project are two-fold: firstly, to create an accurate three-dimensional model of a neurone from the mammalian nervous system, which can be used to obtain quantitative geometric and topological data on the ...

    • Scan Converting Extruded Lines at Ultra High Definition 

      Willis, Philip; Watters, Geoff (Blackwell Publishing Ltd and the Eurographics Association, 1987)
      We consider the problem of generating freehand raster graphics pictures at ultra high definition (typically one gigapixel per picture) by scan converting extruded lines. We describe a fast scan conversion algorithm which ...

    • A Scanline Method for Solid Model Display 

      Patel, Manjula; Hubbold, Roger J. (Blackwell Publishing Ltd and the Eurographics Association, 1987)
      The modelling of solid objects is becoming increasingly important in the application of computer graphics to a wide variety of problems, such as CAD/CAM, simulation, and molecular modelling. A variety of methods for rendering ...