ActionScript 3.0 :: Understanding A Basic Scripting Concept
Jan 16, 2010
I'm currently reading the book Learning ActionScript 3.0 and have dificulties understanding some programing basics due to my total lack of prior programing knowledge.For example now I'm looking at this script from the book that traces a list of all display objects on the stage and their children:[code]I understand everything except one thing. When there is an object with children (DisplayObjectContainer), the function traces the object but doesn't proceed and calls itself starting all over again this time analyzing the first child of the object. And if the child also have children itself the list will branch out until there is an object without children.What I don't understand is how the function at this point knows how to return to the last parent object and continue to analyzes its other children if any.For example when the function analyzes the stage of a scene with the following content how does the function know to continue analyzing child0. To me, looking at the code, I would expect the function to exit after listing [object StaticText]. I have hard time understanding what makes the function go back to largeContainer and continues with its child0 and so on.[code]This all what the book says regarding this which is not enough for me to understand this process:the function calls itself again. passing in the object currentlybeing inspected. This concept is called recursion. A function calling itself mayseem redundant, but it can be very useful. In this case, each time the functionis called, it receives a new display object to analyze, so the function reportsthe contents of that specific display object. The result is a complete walkthroughof all display objects, no matter how many children each may have.
so I'm still learning the basic concepts. Attached to a movieclip used as a button I have this actionscript:
[Code]...
Which basically causes the movieclips 'leaf1' to shrink, 'vinefade' to go to its first frame, 'artween_mc' to unload, and for all other commands on this button to be disabled. I also want it to check another movieclip called 'leaf9', and see if it's current frame is at less than a particular frame number (73), because if so I want it to start playing forward. Once it reaches this frame number (73), I want to cause linkstween_mc to become visible and hit9button (also a movieclip) to become enabled. My current script does absolutely nothing to leaf9
I'm developing a library + workflow for easy (hierarchical) navigation management inside website or application. From popular - can be somehow compared with Gaia Framework and PageManager from Soma Framework (I do personally don't like these implementations because they quite limit development even if they say they don't). I used to develop website so that each section(sub-section, sub-sub-section...) is an instance of a custom class (that extends DisplayObject: Sprite, MovieClip or whatever Flex container even), that contains logic and data in "single layer" manner... and all the view coponents aswell (texts, thumbnails, whatever).
Each of those sections is implementing INavigableObject interface and has navigationHelper (way of composition pattern), which helps with all navigation stuff. So. This approach was OK. But with my last project I felt need to use MVC design pattern, so I decided to refine my navigation stuff. And so therefore I have a question: how does hierarchy looks like when using MVC (any implementation.. custom one or any popular framework like PureMVC..) for website development?
I have load external swf file with loader. The external swf file have animation with embeded mp3 file . when i click the btn unload the external swf file .external swf file is unload ok. But Problam is after few seconds sound is hearing. I think animation still running in backend when reach the first frame sound is hearing.
var ldr:Loader=new Loader()ldr.load(new URLRequest("test.swf")) addChild(ldr) btn.addEventListener(MouseEvent.CLICK,unloadmovie) function unloadmovie(e:MouseEvent){ ldr.unload() SoundMixer.stopAll() }
i want to make a e-magazines,and i want to create with a flip book concept with flash... can i learn about this? where can i find the tutorial about this?
i am quite newbie towards to actionscript 2.0 cos i am now learning on actionscript 2.0 here is the file attachment for you to check.Greetings.zipOutput cannot be worked.I am hoping to see the exact output:Greeting = Hello!Salutation = undefinedSubject: Brick Oven
I'm dabbling in OOP, but I'm nowhere near proficient yet. I have two classes, house() and town(). In house's constructor, I want to define an exit from the house to town. I've set up a Doors and Exits array in the base class, and in house, I add town to it:
Doors = new Array(new trigger()); Exits = new Array(new town());
This way, I can check if the player is colliding with the trigger, and if so, I can set level to Exits[i] or wherever it is. My problem is, including Exits = new Array(new town()); in house's constructor calls town's constructor, and town has an array Exits, which leads back to house and so on. So my question is: How would I get around this problem or structure my level class? Is it possible to use "town" to get to new town(); without manually checking if("town"){ new town(); } etc. Basically, I want to tell flash to create a new town() WHEN I need it, not necessarily during the initial construction, but I don't want to have to manually call "new town();"
I have been charged with creating a rotating billboard for our new company website and I am in the conceptual phase of design.Everyone in the office likes the functionality of the National Geographic home billboard... with its automatic rotating images, pause functionality, and content launching frames.So far I have correctly mirrored the functionality of the National Geographic billboard by physically embedding images into a flash movie and creating mouse click events for buttons and the images themselves.
Design Question:Can Flash emulate the National Geographic presentation? Their images are called upon request, rather than being embedded into a large single movie file like mine. This would allow a non programmer to design a new image billboard and update the website remotely...
This may be a bit of an easy question for some, but I'm having difficulty understanding what mc.name.slice(5,9) does. What is this name slice bit about?
How come every time I run this script:[code]Where does the Undefined come into things? I have only asked the script to fire 3 times so the first time through the text in position [0] in the script Carp should be printed out?
Specifically, I have a demo of a flash game (sort of super mario style). In it I have two types of weapon - a simple fire and big fireball. I reviewed the code in order to learn flash better [I am very new - since around monday this week].
I saw that the program has a variable that keeps track of the number of uses I have left in each weapon. I tried to review all the places this variable was used but I couldn't find where it affects the drawing onto the screen.
I even tried removing the variable declaration and then testing it - so I may find all references to the variable -- By the way any convinient way of finding all references to a variable/method/class [I am using ADOBE FLASH CS5.5]? Also, I tried changing the variables starting value to "12" and I noticed that when I test the game, the weapon has 12 uses indeed.
So my problem:1. It seems that this variable is somehow affecting the drawing. Yet, I don't know how it does so since all the code I have found that uses this variable has nothing to do with drawing. It is all, logic, like
if(var <= 0){ var--; } else{ return false; }
Where is this influence coming from?get all references to a variable[like in eclipse ctrl+shift+g]?
I've been using arrays and for loops in flash for some time now. Mostly successfully.But I'm missing some important understanding of how they really work. Here's the simple code that turns my head around and makes me realize I know nothing.[code]When I trace _root.term_array later in the code, it gives me the list of words and then a ton of 'undefined's. When I trace _root.term_array.length it says it's got 130 items. In my mind it should only have 13.
I started out learning AS3 on my own a while ago without any programming experience whatsoever. I'm still in my diapers, but slowly progressing. Currently I'm working on a short animation with some code involved. Part of the animation is a herd of cows grazing in a pasture. I have a class called Cow which extends MovieClip and on the Cow timeline I have the walk cycle and other cow movements animated. When a cow is walking it slowly moves horizontally, along the x axis. I want the cows, when walking to also randomly move up and down (along the y axis) which would basically look as though the cow is moving further away or moving closer towards us. I'll be resizing each cow, according to its y position to create the effect of perspective (near and far).
What I'm trying to figure out is how to make the cow move either up or down the y axis in a somewhat random way. By "somewhat random" I mean that I don't want the cow to switch directions every second, but rather something like: 5 seconds moving up the y axis, then maybe 8 seconds moving down, then possibly 4 up, then 11 down, etc. It would be super if I could also have a velocity factor involved, meaning that when changing directions - from up to down, or down to up - I prefer that the change is smooth, like as in a ease out and then ease in.
I am trying to understand what part of AS3 script says loop through(create a continues 360 loop of objects) the images from an XML file, does this make any sense.[code]is this the part that says loop the images/objects.this is a little more to the script including the above to maybe understand better?[code]
I have 2 questions about remote shared objects in Flex/ActionScript3:1) If I connect to a remote shared objects, but do not handle the SYNC event, will the shared object still receive data from the server? ie. will the server still broadcast data to this client ? This is what I expect
I'm trying to understand how packages and dependencies work with Adobe Flash Builder 4. I've copied an example here and put it in a .as file called DependencyGraph. However I get the error message: A file found in a source-path must have the same package structure '', as the definition's package, 'DependencyGraph'. I understand that the original file has a package name called package flare.apps. What should I change to enable this to run?
I'm editing the MotionPath LinePath2D by Greensock to make it become LinePath3D. However I'm stuck in editing this method:
[Code]....
I don't get the operations Greensock does to find the y and x inside the atan2. Why does he multiply xChange (which is a scalar and it should be the delta-x of the Line segment [IMG]) to the b component of the matrix and then sum it to the other thing?
fix a counter on one of the flash applets he hired someone to make for him. It's AS2 and done in Flash 8.
http:[url]....
It pulls from the current time on the system clock.Essentially it's counting 4 times too slow. I am awful with even reading AS let alone trying to find the equation running this. what I need to edit in the AS to speed this up?
My problem is understanding the load/unload event. What I have at the moment is a test file. There is one button that loads an external swf (carnival.swf). This seems to work ok as far as i can tell, although I think the way I have hidden the button once the SWF loads is wrong....anyway... On the carnival.swf there would be a "back to main page" button that would simply remove the carnival.swf from the stage and reactivate the button on the main swf, which in the future would have other buttons that would load other swf's on to the stage.
Say I have 3 fla files, each with it's own document class. I want to define some unique variables in each of those 3 files.Now once the variables (unique to each fla) are set, I want to call the same function - setting up the files. I want this function in a separate as file so i only have to make changes in one spot.How do I link the 1 .as file to each of the 3 doc class files and have it's function called in the constructor of each on
I am trying to understand what is going on in a SWC that I am importing from Flash CS4 into Flex Builder 3. Specifically I am using a SWC supplied by a Designer as the animation for a custom preloader (a subclassed DownloadProgressBar).The issue I am trying to understand is, once the FlexEvent.INIT_COMPLETE is fired, I cleanup by removing the swc by running this [code]though even after I have removed this (which is successful, as I have checked by comparing this.numChildren before and after the call) the key framed animation still continues to run (not visibly). This has been detected by the Designer placing a trace in the time line of the animation (in Flash). Can anyone tell me why is it, that even after I have removed the animation from the subclassed DownloadProgressBar, it still keeps running ? Also, is it standard practice when importing SWCs to manage the cleanup of resources from the Flash side of things (much like releasing memory in obj-c). I find it counter intuitive that removing the child from the Flex side does not stop the animation.
I need to dynamically bind properties of components created at runtime. In this particular case please assume I need to use bindProperty. I don't quite understand why the following simplistic test is failing (see code). When I click the button, the label text does not change. I realize that there are simpler ways to go about this particular example using traditional non-dynamic binding, but I need to understand it in terms of using bindProperty.
i'm trying to create a game that has a similar concept as Dance Dance Revolution - if shown is a down arrow then press down, if up arrow is shown then press up ...i'm having problems with the "if shown is a ... arrow" part - i managed to get pressed key check working, so if you press the correct key you'll progress but if you press the wrong one the appropriate action will execute.
in frame 1 i have the movieclip that contains the arrow display with the following code:
onClipEvent(keyDown){ if (_global.x = "up") { if (Key.isDown(Key.UP)){ gotoAndStop("down");
[code]....
looks ok to me, but when i tested by changing the if condition for the mc action to if (_global.x = "down") the thing still executed as if _global.x = "up" .
clarify the different logical instantiations of objects in actionscript?So far it seems there are 3 layers of instantiations, for lack of a better term.The first one is declaring a variable/type.Next is instantiating that variable with something solid in the code, like a method or function? Is this just a way to glue things together? Then after that you instantiate it on the stage, is this something you have to do explicitly, or is it a side effect? Is this "3 layer" concept the correct way of looking at it, kind of like the MVC for flash app logic?
