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Lesson 8. Film Loops and Buttons

Lesson 8. Film Loops and Buttons

In the previous lesson, you created animation by defining keyframes and then tweening the keyframes to show movement. As part of that lesson, you exchanged cast members numerous times to display different versions of a piece of paper that floats from one file folder to another. That procedure was time consuming. In this lesson, you will create the same animation using a quicker, more efficient technique: a film loop. A film loop encapsulates several cast members as a single cast member. You can use a film loop cast member anywhere you would use a regular cast member; the difference is that, as the playback head moves through the score, the film loop cast member displays each cast member it contains. Using a film loop, you can easily fine-tune complex animations by focusing just on the movement of an animated object (for example, a bird flying or a person walking) without having to worry about continually switching cast members in the score.

Figure . In this lesson, you will begin by creating an animation using a sequence of several cast members, and you will then transform this sequence into a single cast member, called a film loop. A film loop encapsulates a sequence of cast members as a single cast member. This cast member then is an entire animation, and like any other cast member, it can be moved across the stage within another animation, enabling you to create complex motion.


If you did not complete the previous lessons, you will still be able to complete this lesson. If you would like to view the final result of this lesson, open the Complete folder in the Lesson08 folder and play Loop.dir.

To give you a jump-start, the media elements have been assembled in the cast and sequenced in the score in Start.dir. You completed this same task in the previous lesson, so you don't need to repeat it here.


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