ActionScript Cookbook by Joey Lott

By Joey Lott

If you have to get the activity performed quick, you are going to achieve for this sensible, nuts-n-bolts toolkit. instead of concentrating on ActionScript within the summary, this Cookbook places concept into perform with ready-made solutions to universal ActionScript difficulties. Flash MX builders can clear up concerns speedy, whereas studying useful concepts for resolving comparable dilemmas sooner or later. ActionScript has blossomed right into a huge and demanding language whose sheer quantity of functions might be daunting. The ActionScript Cookbook breaks all of it down into projects which are proper, functional, and insightful. beautiful to the budding coder in addition to the skilled ActionScript jockeys, this ebook bargains new views and techniques to ActionScript improvement that may empower all builders. This O'Reilly Cookbook enhances ActionScript for Flash MX: The Definitive advisor, 2d version through offering quickly recommendations to universal ActionScript difficulties. This e-book trades on our revered "Cookbook" method, which supplies a worked-out script for each challenge addressed. you should use those "recipes" to unravel an instantaneous challenge, after which discover the problem additional within the Definitive consultant while time allows.

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Obj = new Object( ); // Assign a method named myMethod to an object, obj. myMethod( ) has been called"); }; // Use setInterval( ) to tell the movie to invoke the myMethod( // object approximately every six seconds. setInterval(obj, "myMethod", 6000); ) method of the obj Whichever variation of the setInterval( ) function you use, any additional parameters that you pass to the setInterval( ) function are passed along to the function or method: // Define a function that accepts a parameter and displays it in the Output window.

For (var i = 10; i > 0; i--) { trace(i); } You should not use a for statement to perform tasks over time. Many programmers make the mistake of trying to use for statements to animate movie clips. _x += 10; } Although the preceding code moves the movie clip 200 pixels to the right of its starting point, all the updates take place within the same frame. There are two problems with this. First of all, the Stage updates only once per frame, so only the last update is shown on the Stage (causing the movie clip to jump 200 pixels suddenly rather than moving smoothly in 20 steps).

Here is an example in which two intervals are set one for a square movie clip (every 50 milliseconds) and one for a circle movie clip (every 100 milliseconds): // Define the function first. This function takes three parameters: a reference to // the movie clip object, the change in x, and the change in y. Part I: Local Recipes 35 36 Part I: Local Recipes function moveObj (obj, dx, dy) { // Increment the movie clip's x and y coordinates. _y += dy; // In case the interval is less than the movie's frame rate, you need to use the // built-in updateAfterEvent( ) method to refresh the Stage.

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