Information
- Publication Type: Conference Paper
- Workgroup(s)/Project(s):
- Date: 1997
- Publisher: World Scientific Publishers
- Location: Denver, Colorado
- Lecturer: Christoph Traxler
- Editor: M. M. Novak and T. G. Dewey
- Booktitle: Proceedings of Fractal 97
- Conference date: 2007 –
- 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.Additional Files and Images
Weblinks
No further information available.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.", publisher = "World Scientific Publishers", location = "Denver, Colorado", editor = "M. M. Novak and T. G. Dewey", booktitle = "Proceedings of Fractal 97", keywords = "Cyclic Object Instancing Graphs, PL-systems, Natural Phenomena , Ray Tracing", URL = "https://www.cg.tuwien.ac.at/research/publications/1997/traxler-1997-TRA/", }