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Chapter 5. Graphics on Multiple Layers

Chapter 5. Graphics on Multiple Layers

Macromedia Flash MX uses two types of spatial organization: (1) the position of elements within the rectangle that is the Stage and (2) the way elements stack up. You create an illusion of three-dimensional depth by overlapping objects. As you learned in Chapter 4, you can create this overlapping effect on one layer by stacking groups and symbols. The more elements your movie contains, however, the more difficult it becomes to manipulate and keep track of the stacking order of items on a single layer. You can use multiple layers to bring that task under control.

You could think of a Flash animation as being a stack of film: a sheaf of long, clear acetate strips divided into frames. Each filmstrip is analogous to a Flash layer. Shapes painted on the top strip of film obscure shapes on lower strips; where the top strip of film is blank, elements from lower strips show through.


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