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International Journal of Computer Games Technology
Volume 2013, Article ID 674848, 11 pages
Research Article

Effects of Wind on Virtual Plants in Animation

Department of Computer Science, University of Regina, Regina, SK, Canada S4S 0A2

Received 1 March 2013; Revised 2 July 2013; Accepted 8 July 2013

Academic Editor: Yiyu Cai

Copyright © 2013 Tina L. M. Derzaph and Howard J. Hamilton. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents the Growth-Flow method for animating the effect of wind on the motion and growth of virtual plant branches and leaves. The method incorporates changes to the growth rate when a plant is exposed to winds with speeds higher than a threshold. In particular, growth rate is reduced in branch elongation, increased in the branch radius, reduced in leaf length, and increased in leaf thickness. In addition, when a plant is exposed to wind for long time periods, the branch growth angle is changed to align more closely with the wind vector. The Growth-Flow method incorporates all these effects on growth and motion due to wind in one algorithm.