MACROMEDIA FLASH 8-DEVELOPING FLASH LITE 2.X Instrukcja Użytkownika Pobierz pdf (Strona 9)

Adobe Flash CS3 Classroom in a Book

Lesson 5: Adding Animation

In Lesson 5, students animate the title page for a space

alien cartoon character as they learn about motion

tweens, shape tweens, nested symbols, and motion

animated along a path.

Working with nested symbols

Movie clip symbols have their own Timelines, similar

to the main Timeline. A movie clip symbol may have

other symbols nested within it. In fact, in this lesson,

the alien symbol contains the alien_body symbol,

which contains the alien_head symbol, which, in turn,

contains the alien_head_eye symbol.

You can edit a symbol in place, in the context of other

objects on the Stage, by double-clicking its instance on

the Stage. You can edit a symbol in isolation, so that it

is all that you see, by double-clicking the symbol in the

Library panel.

To edit a nested symbol in place, double-click the sym-

bol that contains it. If a symbol is nested within several

other symbols, you need to navigate through all those

symbols. When you’re in a symbol’s editing mode,

Flash displays the symbol name in the Edit bar above

the Stage. You can refer to the Edit bar to see which

Timeline you’re editing, and to see all the symbols it’s

nested in. To return to the main Timeline, click Scene 1

in the Edit bar. To go to any other symbol’s Timeline in

the path, click that symbol’s name in the Edit bar.

Morphing objects

Shape tweens differ from motion tweens in that

shape tweens actually morph one object into another.

Flash interpolates the values or shapes for the frames

between the ﬁrst keyframe and the second keyframe,

creating the animation.

You can apply shape tweening to drawn shapes. To

apply shape tweening to groups, instances, or bitmap

images, you must ﬁrst break the elements apart. To

apply shape tweening to text, as with the letter “O” in

this lesson, break the text apart twice to convert the text

to shapes.

Animating motion on a path

Motion guide layers let you draw paths along which

tweened instances, groups, or text blocks can be ani-

mated. You can link multiple layers to a motion guide

layer to have multiple objects follow the same path.

A normal layer that is linked to a motion guide layer

becomes a guided layer.

For the best results, keep the motion guide smooth.

Students may ﬁnd it easier to draw a motion guide us-

ing a Wacom tablet or other pen pointer device, rather

than a mouse.

Options in the Property inspector determine how the

shape tween is created:

• Orient To Path - The baseline of the tweened element

orients to the motion path.

• Snap - The registration point of the tweened element

snaps to the motion path.

• Sync - The animation of graphic symbol instances is

synchronized with the main Timeline. The number of

frames in a tween is recalculated to match the number

of frames allotted to it in the Timeline.

LESSON 5

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