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Author: Paul Price

Loops

So what's a loop? A loop is routine that repeatedly performs an operation until a condition is met or broken. There are two types of loops in Flash 5.0 for and while. We will not discuss while loops. A for loop has three parts: the first is the initialization, the second is the condition (usually an inequality, but it can be a conditional as well), and the third is the operation. In the above example, we are setting the initial value of c to 0, we then ask if c is less than or equal to 2. If the answer is no, then we perform the operation within the braces, and then add one to c and repeat the entire process until c is greater than or equal to 2 in which case we stop performing the operation in the braces. The operation occurs very fast; too fast for us to attach our letter MCs. So instead of using a for loop to attach the MCs, I used a frame loop. A frame loop executes every time a frame is entered until a condition is met. I simply incremented a variable within the enterFrame clipEvent; since the variable adds one to itself every time Flash enters a frame, one MC is attached per frame. This staggers the animation in the MCs by one frame. To add more effect, I made each MC gotoAndPlay a random frame on its timeline. If the line is removed the text-effect still works perfectly.

AttachMovie

To use the attachMovie method, you must define the MC's linkage. This is important because your scripts will only work if the names match exactly. The syntax for using the attachMovie method is as follows:

_root.attachMovie("linkage name","new instance name",depth);

The difference between attachMovie and duplicate movie clip is significant. Attach movie actually takes a clip out of Flash's library and places it on the stage. On the other hand, the duplicateMovieclip method does just that, it copies a clip already on the stage, including its clipEvent scripts. I chose to use attachMovie because it makes looping through and removing MCs easier. All of the scripts are in the controller clip.

» Level Intermediate

Added: 2001-11-08
Rating: 7 Votes: 202
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