Glimmr Canvas Animation
version 1/111030 by Erik Temple
Chapter: Animation tracks
GCA simplifies the specification of animations through the concept of the "animation track". An animation track handles one and only one kind of animation effect for one and only one graphic element. However, tracks are "stackable"--you can run multiple tracks simultaneously--so you can build up very complex animations. To display a person walking, for example, you might have two tracks running simultaneously, one responsible for the motion of the sprite from point A to B, and the other for cycling the image used to represent the sprite.
Animation tracks can also do such things as increase or decrease the scaling factor of an element ("zooming" it), fade an element or the entire canvas out to a background color, or simply mark time.