Information
- Publication Type: Conference Paper
- Workgroup(s)/Project(s):
- Date: 1997
- Booktitle: Proceedings of Fractal 97
- Date (from): 2007
- Editor: M. M. Novak and T. G. Dewey
- Lecturer: Christoph Traxler
- Location: Denver, Colorado
- Publisher: World Scientific Publishers
- Keywords: Cyclic Object Instancing Graphs, PL-systems, Natural Phenomena , Ray Tracing
Abstract
In this paper we present a method for the consistent modelling and efficient ray tracing of complex natural scenes. Both plants and terrains are modelled and represented in the same way to allow mutual influences of their appearance and interdependencies of their geometry. Plants are generated together with a fractal terrain, so that they directly grow on it. This allows an accurate calculation of reflections and the cast of shadows. The scenes are modeled with a special kind of PL-Systems and are represented by cyclic object-instancing graphs. This is a very compact representation for ray tracing, which avoids restrictions to the complexity of the scenes. To significantly increase the
efficiency of ray tracing with this representation an adaptation of conventional optimization
techniques to cyclic graphs is necessary. In this paper we introduce methods for the calculation of a
bounding box hierarchy and the use of a regular 3d-grid for cyclic graphs.
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BibTeX
@inproceedings{traxler-1997-TRA,
title = "Efficient Ray Tracing of Complex Natural Scenes",
author = "Christoph Traxler and Michael Gervautz",
year = "1997",
abstract = "In this paper we present a method for the consistent
modelling and efficient ray tracing of complex natural
scenes. Both plants and terrains are modelled and
represented in the same way to allow mutual influences of
their appearance and interdependencies of their geometry.
Plants are generated together with a fractal terrain, so
that they directly grow on it. This allows an accurate
calculation of reflections and the cast of shadows. The
scenes are modeled with a special kind of PL-Systems and are
represented by cyclic object-instancing graphs. This is a
very compact representation for ray tracing, which avoids
restrictions to the complexity of the scenes. To
significantly increase the efficiency of ray tracing with
this representation an adaptation of conventional
optimization techniques to cyclic graphs is necessary. In
this paper we introduce methods for the calculation of a
bounding box hierarchy and the use of a regular 3d-grid for
cyclic graphs.",
booktitle = "Proceedings of Fractal 97",
editor = "M. M. Novak and T. G. Dewey",
location = "Denver, Colorado",
publisher = "World Scientific Publishers",
keywords = "Cyclic Object Instancing Graphs, PL-systems, Natural
Phenomena , Ray Tracing",
URL = "https://www.cg.tuwien.ac.at/research/publications/1997/traxler-1997-TRA/",
}