By Phillip Kerman

Development a linear animation or reasonably interactive Flash motion picture is comparatively uncomplicated. With the improve from Flash four to Flash five, ActionScripting has turn into a fair extra the most important and strong a part of the product. Tapping the tremendous programming functions of Flash, despite the fact that, calls for greater than brute programming skill--it calls for a prepared realizing of the way to use scripting to precise projects. This booklet concentrates on functional functions for Flash programming. The booklet is established into 3 elements: origin wisdom (general programming concept utilized to Flash with brief initiatives to illustrate particular concepts); utilized workshop (more concerned initiatives damaged into 3 elements each--design dialogue, the development steps, and research with feedback of variation); and, Reference (which presents a concise directory of a few of the extra necessary components in ActionScript).

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Keyframe scripts are probably the easiest to understand. You simply select a keyframe and open the Actions panel to create a script. The event that triggers a frame script is that the frame is displayed. That is, if you put a script on 03 0789 CH01 3/20/01 4:02 PM Page 15 Chapter 1 Flash Basics frame 10, it will execute when the playhead reaches frame 10. Keep in mind that Flash executes the script first and then draws the onscreen contents. This becomes important if your script’s instructions are to jump to another frame; you might never see the onscreen contents of the frame where the script is written.

There are situations when you want or need access to a mouse event (such as Roll Over, for example), but you don’t need or want all the pretty graphic features of a button. An invisible button is perfect for this. What’s an invisible button? 11). I don’t know how many times I’ve drawn a shape, converted to a button symbol, and then double-clicked the button instance to edit its contents by dragging the first frame to the hit state—but it’s a lot of times! The coolest part of invisible buttons is that Flash will display (while authoring) a semi-transparent cyan shape, so it’s easy to position the button.

For example, imagine you plan to program a button that will convert a dollar amount from one field and display the equivalent value in Euros in another field. 5 euros=dollars multiplied by exchangeRate euros=euros rounded off to two decimal places put euros into another field end After you know a little bit of ActionScript, you can easily translate this pseudocode into a working script. The first step, however, is to sort things out in your own words. Good Style If this chapter is ambiguous, this section is downright subjective.

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