MACROMEDIA FLASH MX 2004-USING ACTIONSCRIPT IN FLASH Instrukcja Użytkownika Pobierz pdf (Strona 3)

Flash Animation – the 6 Key Concepts

Key Concept 1: Layers

Layers work like sheets of clear plastic on top of each other. If you look at all the

layers together, you can see the whole animation, but each separate layer only

contains a small part of the whole animation. In effect, you build up your

animation from lots of small parts, each part on a different layer.

Key Concept 2: Timeline

The timeline is divided up into numbered blank frames. You control the order that

things happen in your animation by placing events in different frames along the

timeline. The default setting for Flash is 12 frames per second, so every 12

frames represents one second of animation

Key Concept 3: Keyframes

You control changes in your animation by positioning keyframes along the

timeline. A keyframe position indicates which layer is affected and where on the

timeline that change happens.

Key Concept 4: Symbols and Instances

Symbols are part of the reason that Flash produces such small files. When you

create a symbol, Flash stores it in its library. Next time you use your symbol in

the animation, Flash refers to its library copy. So a symbol can be used hundreds

of times in an animation or just once – the file size is the same.

There are 3 kinds of symbols: Graphic, Movie Clip and Button

By editing a symbol, you change all the examples of it in your animation. You can

also copy a symbol and change its size, colour and transparency without affecting

the original symbol. This copy is called an ‘instance’.

Key Concept 5: Tweening

In traditional animation, if you were moving an object across the stage, you

would have to set its new position in every frame in the timeline. With tweening,

all you have to do is set the first position and the last position. Then you ask

Flash to add tweening to fill in the animation between the 2 keyframes. There are

two kinds of tweening:

• Motion tweening is used when symbols are changed. It covers position

change, colour change, alpha (transparency) change, rotation and

scaling changes.

• Shape tweening is used when one shape is deformed into another.

Neither of these shapes can be symbols.

Key Concept 6: Buttons and ActionScript

If you want users to interact with your animation, you need to use buttons. Once

you have created a button symbol, you can assign actions to it using ActionScript,

so that something happens when the user clicks interacts with that button.

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MACROMEDIA FLASH MX 2004-USING ACTIONSCRIPT IN FLASH Instrukcja Użytkownika Strona 3