MACROMEDIA DIRECTOR MX 2004-GETTING STARTED WITH DIRECTOR Instrukcja Użytkownika Pobierz pdf (Strona 67)

Writing scripts to control the movie 67

To make the playhead stay in one scene, you loop it in a single frame or a series of frames. For the

start scene and the sound and video scene, the playhead can loop in one frame. For the animation

scene, where the animation occurs over a series of frames, the playhead should loop over the same

series of frames.

To control the movement of the playhead without using buttons, you use the Script channel in

the Score. As with the sound channels, the Script channel is one of the effects channels that

appear above the frame number bar in the Score.

Write a handler

The start scene is the first one that needs a script to loop the playhead. Each time the playhead

leaves one frame to go to the next, an event, called an

exitFrame event, occurs. In this case, the

word event refers to an action executed in Director. Your first script will use the

exitFrame event

as its trigger.

Each script you write is composed of handlers. A handler is a set of Lingo commands that handle

a specific event, such as the

exitFrame event. Some scripts have only one handler and some have

multiple handlers. Each handler begins with the name of the triggering event, such as

exitFrame,

and ends with the word

end.

When you need to enter or edit scripts in Director, you use the Script window. Each script

becomes a cast member. The Script window contains tools for editing scripts easily.

1 In the Script channel of the Score, double-click frame 10, the last frame of the start scene. The

Script window opens, and it already includes a default handler:

on exitFrame me

end

2 In between these two lines of script, enter the following additional script:

_movie.go(_movie.frame)

The result is a handler that should look like this:

on exitFrame me

_movie.go(_movie.frame)

end

3 Close the Script window. The new script cast member appears in the Cast window in the first

available cast slot. A sprite for the script also appears in the Script channel in frame 10.

4 In the Cast window, select the new script.

5 In the Cast Member Name text box at the top of the Cast window, type Loop. Press Enter

(Windows) or Return (Macintosh).

6 At the bottom of the Stage, below the movie, click the Rewind button. Then also at the bottom

of the Stage, click the Play button to play your movie.

The movie plays to frame 10 and stops. The movie continues to play, even though it loops at

frame 10.

Script channel

1 2 ... 62 63 64 65 66 67 68 69 70 71 72 ... 83 84

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