Adobe Flash Professional CS3 Manuel d'utilisateur télécharger pdf (Page 249)

FLASH CS3

User Guide

243

See also

“Create symbols” on page 209

“Break text apart” on page 271

“Tweened animation” on page 240

Create a motion tween by using the Motion Tweening option

Click a layer name to make it the active layer, and select an empty keyframe in the layer where you want the

animation to start.

2 To create the first frame of the motion tween, do one of the following:

• Create a graphic object with the Pen, Oval, Rectangle, Pencil, or Brush tool, and then convert it to a symbol.

• Create an instance, group, or text block on the Stage.

• Drag an instance of a symbol from the Library panel.

3 Create a second keyframe where you want the animation to end, and leave the new keyframe selected.

4 To modify the item in the ending frame, do any of the following. To tween the color of elements other than

instances or text blocks, use shape tweening:

• Move the item to a new position.

• Modify the item’s size, rotation, or skew.

• Modify the item’s color (instance or text block only).

5 Click any frame in the tween’s frame span and select Motion from the Tween pop-up menu in the Property

inspector (Window > Properties > Properties).

6 If you modified the size of the item in step 4, select Scale to tween the size of the selected item.

7 To produce a more realistic sense of motion, apply easing to the motion tween. To apply easing to a motion tween,

use the Ease slider to specify an easing value for each motion tween you create, or use the Custom Ease In/Ease Out

dialog box to more precisely control the speed of the motion tween.

Drag the arrow next to the Easing value or enter a value to adjust the rate of change between tweened frames:

• To begin the motion tween slowly and accelerate the tween toward the end of the animation, drag the slider up or

enter a negative value between -1 and -100.

• To begin the motion tween rapidly and decelerate the tween toward the end of the animation, drag the slider down

or enter a positive value between 1 and 100.

• To produce a more complex change in speed within the tween’s frame span, use the Custom Ease In/Ease Out

dialog box.

By default, the rate of change between tweened frames is constant. Easing creates a more natural appearance of accel-

eration or deceleration by gradually adjusting the rate of change.

8 To rotate the selected item while tweening, select an option from the Rotate menu:

• To prevent rotation, select None (the default setting).

• To rotate the object once in the direction requiring the least motion, select Auto.

• To rotate the object as indicated, and then enter a number to specify the number of rotations, select Clockwise

(CW) or Counterclockwise (CCW).

Note: The rotation in step 8 is in addition to any rotation you applied to the ending frame in step 4.

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Adobe Flash Professional CS3 Manuel d'utilisateur Page 249