A simple, efficient method for realistic animation of clouds

Authors:
Yoshinori Dobashi;Kazufumi Kaneda;Hideo Yamashita;Tsuyoshi Okita;Tomoyuki Nishita
Affiliations:
Hokkaido University, Faculty of Engineering, Kita 13, Nishi 8, Kita-ku, Sapporo 060-8628 Japan and Hiroshima City University, 3-4-1, Ozukahigashi, Asaminami-ku, Hiroshima, 731-3194 Japan;Hiroshima University, 1-4-1, Kagamiyama, Higashi-hiroshima, 739-8527 Japan;Hiroshima University, 1-4-1, Kagamiyama, Higashi-hiroshima, 739-8527 Japan;Hiroshima City University, 3-4-1, Ozukahigashi, Asaminami-ku, Hiroshima, 731-3194 Japan;University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033 Japan
Venue:
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
Year:
2000

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Abstract

This paper proposes a simple and computationally inexpensive method for animation of clouds. The cloud evolution is simulated using cellular automaton that simplifies the dynamics of cloud formation. The dynamics are expressed by several simple transition rules and their complex motion can be simulated with a small amount of computation. Realistic images are then created using one of the standard graphics APIs, OpenGL. This makes it possible to utilize graphics hardware, resulting in fast image generation. The proposed method can realize the realistic motion of clouds, shadows cast on the ground, and shafts of light through clouds.