MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH Bedienungsanleitung PDF herunterladen (Seite 9)

Animation and gradients 9

The next step is to create a movie clip symbol and place this eight-ball

graphic inside it. Inside this movie clip is where the “8” graphic is added

along with a mask layer. Then add a mask that is the same size and shape as

the eight ball, and use the Free Transform tool and motion tweening to

create the illusion of the ball rolling in various directions by moving and

squashing the “8” graphic across the surface of the circle. The mask

constrains the visibility of the “8” graphic to the exact area of the circle

below it. This makes for a convincing illusion of the ball rolling.

Then add animations of the ball rolling to a stop and starting from a

stationary position. Use descriptive frame labels and simple frame actions

so this movie clip can be targeted later with ActionScript from the main

timeline. The movie clip has to be set up this way; it uses a drop shadow,

which can be applied only to movie clip instances.

Applying the drop shadow is the easiest part, thanks to the graphics filters

in Flash. You simply select the movie clip instance, and from the Filters tab

of the Property inspector, click the Plus (+) pop-up menu and select Drop

Shadow. From there you can adjust the amount of blur, strength, quality,

color, angle distance, and so on.

The drop shadow filter is used to create blurs only when the eight ball is

animated moving rapidly across the screen. This emphasizes the speed at

which the ball is moving and creates a dynamic visual effect.

You can find the sample source file, animation_and_gradients.fla, in the

Samples folder on your hard disk.

■ In Windows, browse to boot drive\Program Files\Macromedia\Flash

8\Samples and Tutorials\Samples\Graphics\AnimationAndGradients.

■ On the Macintosh, browse to Macintosh HD/Applications/

Macromedia Flash 8/Samples and Tutorials/Samples/Graphics/

AnimationAndGradients.

This sample was developed by Chris Georgenes.

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MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH Bedienungsanleitung Seite 9