ABSTRACT
The interpolation comes in two forms – coordinates interpolation and orientation interpolation. Interpolation of orientations is more complex than interpolation of positions. The very term key frame comes from creating cartoons – usually there is a set of key frames drawn by leading artists while all intermediary frames are drawn based on these key frames by other artists. Most of complex animated models used in computer graphics, especially in games, are of human characters or some animals. It can be easily noted that animation of such models can be largely defined by animation of its skeleton. One of the simple animations often used to control cameras in games and films is the path following. Since bones are usually organized into the hierarchy, then any bone has a link to its parent bone and transformation for every bone is usually given in terms of its parent bone.
