Volume 13 (1994): Recent submissions

Now showing items 61-69 of 69

    • Five-dimensional Adaptive Subdivision for Ray Tracing 

      Simiakakis, G.; Day, A. M. (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper presents a directional subdivision method for speeding up ray tracing. This method is easy to use, because it automatically adapts the subdivision to the scene relieving the user from having to set parameters ...

    • Making Shaders More Physically Plausible 

      Lewis, Robert R. (Blackwell Science Ltd and the Eurographics Association, 1994)
      There is a need to develop shaders that not only"look good", but are more physically plausible. From physical and geometric considerations, we review the derivation of a shading equation expressing rejected radiance in ...

    • A Theoretical Framework for Physically Based Rendering 

      Lafortune, Eric P.; Willems, Yves D. (Blackwell Science Ltd and the Eurographics Association, 1994)
      In this paper we introduce the concept of the global reflection distribution function which allows concise formulation of the global illumination problem. Unlike previous formulations it is not geared towards any specific ...

    • Strands, Gravity and Botanical Tree Imagery 

      Holton, Matthew (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper presents a technique for the modelling and rendering of realistic botanical tree images. A strand model is used that is analogous to the internal vascular structure of a tree. The model is"grown" under the ...

    • Computer Generated Copper Plates 

      Leister, Wolfgang (Blackwell Science Ltd and the Eurographics Association, 1994)
      Making computer generated copper plates with image generation algorithms is presented. The method uses a kind of volume texturing in connection with image processing algorithms, and is suitable for implementation in a ray ...

    • Experiments in the Parallel Computation of 3D Convex Hulls 

      Claret, A.R.; Day, A.M. (Blackwell Science Ltd and the Eurographics Association, 1994)
      Two parallel implementations of a 3D convex hull algorithm are reported. The paper considers a MIMD distributed memory architecture and the implementations are carried out on the Meiko Computing Surface using T800 transputers ...

    • A Data Structure for Artificial Terrain Generation 

      Dixon, A. R.; Kirby, G. H.; Wills, D. P. M. (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper addresses the problems of maintaining the consistency of spatial data under recursive subdivision algorithms for artificial terrain generation. Fractal modelling techniques are outlined, with particular reference ...

    • Controllable Locality in C2 Interpolating Curves by B2-splines / S-splines 

      Kuroda, Mitsuru; Furukawa, Susumu; Kimura, Fumihiko (Blackwell Science Ltd and the Eurographics Association, 1994)
      This paper presents a systematic scheme for controlling the local behaviour of C2 interpolating curves, based on the cubic B2-splines and the quartic S-splines. Both splines have an additional control point obtained by ...

    • Classification of Ray-Generators in Uniform Subdivisions and Octrees for Ray Tracing 

      Endl, Robert; Sommer, Manfred (Blackwell Science Ltd and the Eurographics Association, 1994)
      Spatial subdivisions cause an enormous acceleration of ray tracing due to the reduction of ray-object intersections. For this purpose it is necessary to generate the sequence of ray-cells (all cells met consecutively by a ...