Keyframing
There is also an animation technique known as keyframing. Contrary to tweening, every frame of a keyframed computer animation is directly modified or manipulated by the creator, such that no tweening has actually occurred. This method is similar to the drawing of traditional animation, and is chosen by artists who wish to have complete control over the animation.
Consider the following examples, created using animated GIFs, wherein a key frame defines the starting and ending points of any smooth transition:
Read more about this topic: Key Frame, Animation By Means of Computer Graphics