The 12 basic principles of animation is founded by Ollie Johnston and Frank Thomas. They have publish a book "The Illusion of Life Disney Animation" which aims to produce more realistic animations.
The purpose of creating all these principles was to produce an illusion of characters according to the basic laws of physics and they also will be handling with more complicated issues such as emotional timing animation and character own appeal.
referring it as "the bible of animation", to this date, it is still widely use in the animation industry in both hand-drawn animation and computer animation.
