MACROMEDIA FLASH 8-DEVELOPING FLASH LITE 2.X Instrukcja Użytkownika Pobierz pdf (Strona 19)

Adobe Flash CS3 Classroom in a Book

• Use layers to separate elements that change during the

animation from elements that do not.

• Use Modify > Shape > Optimize to minimize the

number of separate lines that are used to describe

shapes.

• Limit the number of special line types, such as

dashed, dotted, ragged, and so on. Solid lines require

less memory. Lines created with the Pencil tool require

less memory than brush strokes.

• Limit the number of fonts and font styles. Use em-

bedded fonts sparingly because they increase ﬁle size.

• For Embed Fonts options, select only the characters

needed instead of including the entire font.

• Use the Color menu in the Symbol Property inspector

to create many instances of a single symbol in different

colors.

• Use the Color panel (Window > Color) to match the

color palette of the document to a browser-speciﬁc

palette.

• Use gradients sparingly. Filling an area with gradient

color requires about 50 bytes more than ﬁlling it with

solid color.

• Use alpha transparency sparingly because it can slow

playback.

Bitmap caching

Bitmap caching helps you enhance the performance of

nonchanging movie clips in your applications. When

you set the MovieClip.cacheAsBitmap or Button.

cacheAsBitmap property to true, Flash Player caches

an internal bitmap representation of the movie clip

or button instance. This can improve performance for

movie clips that contain complex vector content. All

of the vector data for a movie clip that has a cached

bitmap is drawn to the bitmap, instead of to the main

Stage.

Note: The bitmap is copied to the main Stage as un-

stretched, unrotated pixels snapped to the nearest pixel

boundaries. Pixels are mapped one-to-one with the

parent object. If the bounds of the bitmap change, the

bitmap is re-created instead of being stretched.

LESSON 10

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MACROMEDIA FLASH 8-DEVELOPING FLASH LITE 2.X Instrukcja Użytkownika Strona 19