Model: This is some type of representation (conceptual, mathematical, physical, computational) of a real object. Example: a model of a bouncing ball would produce results that agree with a real ...

Krita is one such powerful, open-source program that allows artists to draw and animate in a smooth, intuitive environment.

Animating in Flash requires certain understanding of motion and a lot of patience. Figuring out how the animation will work is not so hard, but achieving the desirable result is usually painstaking.