Malin Jonsson
University of Gävle, Sweden
Anders Hast
Creative Media Lab, University of Gävle, Sweden
Download articlePublished in: Special Effects and Rendering. Proceedings from SIGRAD 2002; Linköpings universitet; Norrköping; Sweden; November 28th and 29th; 2002
Linköping Electronic Conference Proceedings 7:3, p. 17-22
Published: 2002-11-28
ISBN:
ISSN: 1650-3686 (print), 1650-3740 (online)
Several methods for rendering and modeling water have been made and a few of them address the natural phenomenon of water droplets flow. As far as we know; none of those methods have used bump maps in order to simulate the flow of a droplet on structured surfaces. The normals of the bump map; that describes the geometry of the micro structured surface; are used in the flow computation of the droplets. As a result; the water droplets will meander down on the surface as if it has a micro structure. Existing models were not suitable for this purpose. Therefore; a new model is proposed in this paper. The droplet will also leave a trail; which is produced by changing the background texture on the surface. This method will not present a physically correct simulation of water droplets flow on a structured surface. However; it will produce a physically plausible real-time animation.
1. Dorsey J; Pedersen H; Hanrahan P. Flow and changes in appearances. SIGGRAPH 96; pp. 411-420; 1996.
2. Foster N; Metaxas D. Realistic Animation of Liquids. Graphical Models and Image Processing. 58(5) pp. 471-483; 1996.
3. Foster N; Fedkiw; R. Practical Animation of Liquids. Proceedings of the 28th annual conference on Computer graphics and interactive techniques; 2001.
4. Fournier P; Habibi A; Poulin P. Simulating the flow of liquid droplets. Proceedings of Graphics Interface 98 pp. 133-42; 1998.
5. Fournier A. A Simple Model of Ocean Waves. Computer Graphics 20(4); pp. 75-84; 1986.
6. Kaneda K; Kagawa T; Yamashita H. Animation of Water Droplets on a Glass Plate. Proceedings of Computer Animation 93; pp. 177-89; 1993.
7. Kaneda K; Shinya I; Yamashita H. Animation of Water Droplets Moving Down a Surface. The Journal of Visualization and Computer Animation 10 1999.
8. Kaneda K; Zuyama Y; Yamashita H; Nishita T. Animation of Water Droplet Flow on Curved Surfaces; Proceedings of Pacific Graphics 96; pp. 50-65; 1996.
9. Kilgard M. J. A Practical and Robust Bump-mapping Technique for Today s GPUs Game Developers Conference; Advanced OpenGL Game Development. 2000.
10. Max N. Vectorized procedural models for natural terrain: Waves and islands in the sunset. SIGGRAPH 15; pp. 317-324; 1981.
11. Nicholson W. K. Linear Algebra With Applications PWS Publishing Company; Third Edition; pp. 275; 1995.
12. Peachey D. Modeling Waves and Surf. Computer Graphics 20(4); pp. 65-74; 1986.
13. Ts’o P; Barsky B. Modeling and RendingWaves:Wave- Tracing Using Beta-Splines and Reflective and Refractive Texture Mapping. ACM Transactions on Graphics 6; pp. 191-214; 1987.
14. Yu Y-J; Jung H-Y; Cho H-G. A new water droplet model using metaball in the gravitational field. Computer & Graphics 23; pp. 213-222; 1999.