Perhaps the most spectacular instance to date of conventional animation techniques applied to the animation of animals is the dinosaurs in the blockbuster feature film ``Jurassic Park'' (a 1993 Amblin Entertainment Production for Universal Pictures). Yet as realistic looking as they may be, these dinosaurs are merely graphical puppets which require teams of highly skilled human animators to plot their actions and detailed motions carefully from one step to the next. This reveals the main drawback of keyframing: The amount of effort expended by the animator increases dramatically with the length, complexity and intended realism of the animation.
Techniques that do not require as much animator skill, such as motion capture schemes [Calvert, Chapman and Patla1980], have also been widely used in producing realistic animated motions. However, they tend to be inflexible, since they produce motions that are highly specific, hard to parameterize, and difficult to compose into lengthier animations. Moreover, such schemes are not easily applied to non-human or imaginary creatures.
|Xiaoyuan Tu||January 1996|