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Discrete Physics-Based Models

The bodies of most fishes are highly deformable structures. We construct our dynamic fish model using a deformable mass-spring-damper system. There are several reasons for this choice:

Both passive and active deformable objects have been successfully animated using similar mass-spring-damper models. Terzopoulos et al. Terzopoulos87,Terzopoulos88 developed models for deformable objects capable of exhibiting a range of elastic behaviors. These models effectively animate the nonrigid motions of cloth, paper, metal, rubber, plastic, etc. The active contour models that we employed to compute texture mapping coordinates (see Chapter gif) are also based on such models. Two instances of employing similar mass-spring models for animating active objects are the animation of snakes and worms [Miller1988] and the animation of human faces [Terzopoulos and Waters1990, Lee, Terzopoulos and Waters1995].


next up previous contents
Next: Structure of the Dynamic Fish Up: Biomechanical Fish Model and Locomotion Previous: Biomechanical Fish Model and Locomotion
Xiaoyuan TuJanuary 1996