This paper presents an automatic animation system for jellyfish that accounts for interaction between the organism and its surroundings. We endeavor to modei the jellyfish's morphology,as well as its achieved thrust. We physically simulate the elastic body of the jellyfish and its surrounding sea water. We use a modified immersed boundary method to combine spring-mass systems and a grid-based semi-Lagrangian fluid solver. The resulting simulations are efficient with an acceptable compromise in physical accuracy. We reduce our modei for axially symmetric species to 2D, and extrapolate the results to 3D.We add detail to the 3D shape with noise that is inspired by empirkal observations of real jellyfish. We also suggest suitable contraction functions so that our virtual jellyfish propells itself within the water in a manner similar to the real organism. The resulting system is capable of animating jellyfish in real-time on modest desktop hardware.

Additional Metadata
Keywords Fluid dynamics, Jellyfish, Marine invertebrates, Physics-based animation
Conference 4th International Conference on Computer Graphics Theory and Applications, GRAPP 2009
Citation
Rudolf, D. (Dave), & Mould, D. (2009). Interactive jellyfish animation using simulation. Presented at the 4th International Conference on Computer Graphics Theory and Applications, GRAPP 2009.