ActionScript: Your visual blueprint for creating interactive by Rob Huddleston

By Rob Huddleston

I'm at present attempting to research AS3 and this was once one of many first books i purchased. i purchased it simply because in a cursory manner, the ebook appeared to start through quick getting into OOP and that i concept it will extend at the topic from there. yet frankly the power of this publication is it truly is weak point. It treats each topic on the most elementary, so much simplistic, effortless to appreciate approach attainable, yet by no means each is going into any intensity.

Essentially in case you have by no means programmed earlier than, and need a brief reference advisor to super simple syntax, it is a good selection. when you are trying to find anything that is going into any intensity, and has coding examples which are longer than five traces lengthy, get whatever assorted. And when you are searching for whatever on AS3 item orientated programming steer very very transparent simply because this booklet has completely not anything at the topic past one initial bankruptcy, and some different minor references.

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Additional resources for ActionScript: Your visual blueprint for creating interactive projects in Flash CS4 Professional

Sample text

Both arrays and objects can contain data with varying data types. indd 29 5/28/09 11:07:01 PM Add Constants V ariables, by definition, contain code that will possibly change over the course of the execution of a movie. In a quiz application, for instance, you will need to constantly update the user’s score based on how he or she does in the quiz. However, you may encounter situations in which you want to create a constant: a named reference to something whose value cannot change as the movie runs.

Flash contains two drawing models. When you use the Merge Drawing model, the stroke and fill are separate objects, so if you move the stroke, for example, the fill remains in place on the Stage. Also, objects drawn on the same layer will interact with one another; if you move a shape on top of another shape and then move it away, the shape you are moving will cut itself out of the shape you moved it over. In the Object Drawing model, shapes are automatically grouped, so the fill and stroke will act as a single shape, and multiple shapes on the same layer will not interact.

Fortunately, ActionScript contains a trace command that enables you to test the values of any variables you need. When you trace a variable, its value appears in the Output panel when you play the movie in Flash Player. You can trace variables, literal values, and other data to test to be sure that their values are what you expect. Much more difficult to debug are what are known as logical errors. A logical error is when your code is syntactically correct but contains a mistake in the script that causes it to run incorrectly.

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