Tài liệu Thiết kế flash với flash cs5 part 40 doc

Reversing Frames Reverse Frames Click and drag on the range of the frame span or tween you want to reverse.. Click the Modify menu, point to Timeline, and then click Reverse Frames..

The frame rate describes the amount of frames the Flash Player will play each second The higher you set the frame rate, the smoother your animations will play Traditional animations play at a rate of 24 frames per second, the same rate at which film plays, while NTSC video plays

at 29.97 frames per second It is important to keep your audience in mind and what the destination of the Flash movie will be For delivery via the Web, you should consider the processor speeds of the destina-tion computers If you set the frame rate too high, the computer may not be powerful enough to play all of the frames When this happens, Flash will drop frames in order to stay in sync Try to avoid this scenario because it can make your animations play choppily Consider where your Flash movie is going to be played and choose accordingly Avoid frame rates over 30 fps, and, for slower computers, you can go as low

as 12 fps, which is the default frame rate in Flash

Changing the Frame

Rate

Change Frame Rate

Click a blank area on the Stage

Click in the Frame Rate field in the

Property Inspector or at the

bottom of the Timeline, and then

type in a frame rate

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Document settings appear in the Property Inspector when nothing is selected on the Stage or the Timeline.

The frame rate is also available to change at the bottom of the Timeline

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Did You Know?

You can also change the frame rate in

the Document options window

Access this window by clicking the

Document button in the Property

Inspector or in the Modify menu

The frame rate is ignored for FLV Flash

video You need to set its frame rate in

the encoder or editing application

With a classic tween, use the Reverse Frames command to reverse the frames in the Timeline You can access this action in the Modify menu and it will be applied to all selected frames This works for animations created frame-by-frame or with motion or shape tweening applied

Flash changes the order of the frames so your animation plays back-wards

Reversing Frames

Reverse Frames

Click and drag on the range of the

frame span or tween you want to

reverse

Click the Modify menu, point to

Timeline, and then click Reverse

Frames.

TROUBLE? If the tween is not

preserved when you use the

reverse frames command, you

might not have applied motion or

shape tweening to the end

keyframe in the tween Flash only

requires you to apply tweening to

the starting keyframe in a tween It

is implied that it tweens into the

next (or end) keyframe To fix this,

do one of the following: (1) Before

you reverse frames, select the end

keyframe and apply Motion (for

motion tweening) or Shape (for

shape tweening) to it from the

Property Inspector (2) After you

reverse frames, select the

beginning keyframe (which use to

be the end keyframe) and apply

Motion (for motion tweening) or

Shape (for shape tweening) to it

from the Property Inspector

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Frames before reversing

Click and drag to select a range of frames

Frames after reversing

Did You Know?

You can select an entire layer and

reverse all the frames on that layer To

select an entire layer, click the layer

name to select it, and then reverse

frames

With a classic tween, you can add keyframes to a motion tween by simply dragging the object on the Stage on the frame on which you want the change (or keyframe) to be created or by using the Add Keyframe function in the Insert menu For example, if you want the object to move to another coordinate before it reaches the end posi-tion, you can set another keyframe between them In this way, you can animate shapes in several directions in the same motion tween

Alternately, you can clear a keyframe from the tween by selecting it and using the Clear Keyframe function in the Modify menu In either case, the length of the tween is preserved; the frame’s status as a keyframe is removed and Flash redraws the animation, connecting the keyframes located before and after

Adding and Removing

Keyframes from a

Classic Tween

Add a Keyframe to a

Classic Tween

Click on a frame in a tweened

framespan you want to add a

keyframe to

Click the Insert menu, point to

Timeline, and then click Keyframe.

TIMESAVER Press F6 to insert

a keyframe

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Keyframe is added

Did You Know?

You can click and drag the object on

the Stage and move it to another

coor-dinate Flash automatically creates a

keyframe on the active frame if the

playhead is in a motion tweened

framespan

Remove a Keyframe from a

Classic Tween

Click on the keyframe you want to

remove in the motion tween

Click the Modify menu, point to

Timeline, and then click Clear

Keyframe.

The keyframe is cleared but the

duration of the tween is preserved

The first and last keyframe are

automatically reconnected and

Flash redraws the tween

TIMESAVER Press Shift+F6 to

remove the keyframe

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Keyframe is removed

Duration is maintained

With a classic tween, any change made to an object on either keyframe can be tweened Included are any changes made to the scale

or rotation of objects on either keyframes in a tweened span Simply alter the size or rotation of the instance on either frame, and Flash gradually tweens these properties To change scale, you must select the scale option in the Property Inspector, while rotation has several options to choose from, including clockwise and counter-clockwise rotation, and frequency of rotation

Scaling and Rotating

a Classic Tween

Change Scale During a

Classic Tween

Open a document with a tweened

animation or create a new one

Select the first keyframe in the

tween to open the Motion settings

in the Property Inspector

Select the Scale check box in the

Property Inspector

Change the size of the object on

either keyframe with any of Flash's

transform methods including the

Free Transform tool, the Transform

panel or the transform options in

the Modify menu

To preview the animation, drag the

playhead in the Timeline, or click

the Control menu, point to Test

Movie, and then click Test.

Flash gradually increases or

decreases the size of the object

TIMESAVER Press A+Return

(Mac) or Ctrl+Enter (Win) to test it

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First keyframe Last keyframe

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Scale and position changes tweened

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Change Rotation During

Classic Tween

Open a document with a tweened

animation or create a new one

Change the rotation of the object

on either keyframe with any of

Flash's transform methods

including the Free Transform tool,

the Transform panel or the

transform options in the Modify

menu

In the Property Inspector, click the

Rotation Options list arrow, and

then select a rotation property:

◆ None This is the default

setting No rotation is applied

◆ Auto Rotates the object in the

direction requiring the least

motion

◆ CW Rotates the object

clockwise Enter the number of

times you want the object to

rotate

◆ CCW Rotates the object

counter-clockwise Enter the

number of times you want the

object to rotate

To preview the animation, drag the

playhead in the Timeline, or click

the Control menu, point to Test

Movie, and then click Test.

Flash gradually rotates the object

in the direction indicated

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First keyframe Last keyframe

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Rotation and position changes tweened

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