Why isn't this working as I am thinking it would:
var i:int=-1;
for each(obj in myData)
{
i++;
var loader:Loader=new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,function(event:Event)
{
trace(i);
});
}
There are 3 objects in myData and the trace statement looks like:
2
2
2
Instead of:
0
1
2
If I add i to an array (like myArr.push(i)) it will have 3 elements, 0, 1 and 2.
Any ideas?
Thank you.
That's a very bad approach you've taken... Just don't do any of those things you are trying to do, and it'll be fine... No point in using anonymous function here (it's never actually in AS3), no point to use for-each, because what you need is for(;;). You use dynamic typing for no benefit what so ever (there's no benefit in dynamic typing in AS3 and never was anyway). And, yeah, the closure will capture the context, the context has only one i, and it's value is 2, so the first trace is what you should expect.
What you should be doing - store the loaders in some data structure and fetch them from that data structure later (when you need that identifier). And please, for the sake of us users, load whatever you are trying to load sequentially - because if you don't, we'll get the IO errors you aren't handling...
First let me tell you why it doesn't work as you expect.
What is happening is, the for is looping through your elements, and creates all the loaders, incrementing i, but the Event.COMPLETE happens sometime later, where the i is already at the value 2, so that's why you get that output.
As wvxvw suggested, you need some more data structure, something like this:
class MyLoader {
private var i: int;
private var loader: Loader;
function MyLoader(i:int) {
this.i = i;
loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoaded);
}
function onLoaded(event:Event)
{
trace(i);
}
}
And you will use it in your loop:
var i:int = 0;
for each(obj in myData) {
var loader:MyLoader=new MyLoader(i++);
}
Of course, you will need to add lots more to that MyLoader, like handling the errors, and pass more meaningful things to make everything work.
Related
I am working on a large Flash project.
I have tried "Goto Declaration" but that doesn't seem help.
Btw I am using FlashDevelop. And Yes I can perfectly compile and build TO 100% working source.
Here is a code sample. I know you can't do much with this but tell how I can work with this.
public function aim_(_arg_1:Vector3D, _arg_2:Vector3D, _arg_3:ProjectileProperties):Vector3D
{
var _local_4:Vector3D;
var _local_5:GameObject;
var _local_6:Vector3D;
var _local_7:Number;
var _local_8:Number;
var _local_9:int;
var _local_10:Boolean;
var _local_11:int;
var _local_12:Boolean;
var _local_13:* = undefined;
var _local_14:int = Parameters.data_.aimMode;
var _local_15:Number = (_arg_3.speed_ / 10000);
var _local_16:Number = ((_local_15 * _arg_3.lifetime_) + ((Parameters.data_.Addone) ? 1 : 0));
var _local_17:Number = 0;
var _local_18:Number = int.MAX_VALUE;
var _local_19:Number = int.MAX_VALUE;
aimAssistTarget = null;
for each (_local_5 in map_.goDict_)
{
if (_local_5.props_.isEnemy_)
{
_local_10 = false;
for each (_local_11 in Parameters.data_.AAException)
{
if (_local_11 == _local_5.props_.type_)
{
_local_10 = true;
break;
};
};
What you're trying to achieve is reverse engineering a decompiled code. With "_local" variables you need to investigate what values they are assigned, in what algorithms do they participate, and here you just need to read this single function in its entirety to be able to discern meaning of those local variables. But, you would also need to understand many of the named parameters to get some of those meanings. For example, _local_11 iterates through some Parameters.data_.AAException list of ints, and is compared with current outside loop iterator's props.type_, therefore "AAException" should mean "AA exemption" and _local_10 provides check result, whether current enemy is exempt from AA (whatever is that AA). And so on.
Same with _arg_X variables, you need to find out what's being passed into a function from wherever it's called, and retrieve the context of those parameters, also taking their type into consideration, like here _arg3 is of type "ProjectileProperties", meaning this function should relate to some projectile which properties affect its outcome somehow. Most likely it's taking two vectors of projectile (or source, this is outside of this code) and target (or speed, same here), and generates another vector of yet unknown purpose.
When you have investigated every function like this, you'll have quite a bunch of pieces to a single puzzle that you can combine by references, discovering all the algorithms that combine the code of whatever app you've decompiled. Then you will be able to do targeted modifications of whatever kind you wanted initially. But yes, it'll be better if you'd have access to actual sources from whoever created this the first time.
In short: Think. Think, think and think.
There are few answers which mix two audio tracks with sampleDataEvent listener while playing the entire sound. Is there any way to mix the tracks as fast as possible? (The tracks are of equal duration and is in the form of ByteArray)
In the post below
Programatically Mixdown of audio tracks (no playback)
the author suggests using Event.EnterFrame. However, I'm not quite familar with AS3's API. Can anyone give some example code? Thanks!
If you don't need to output the mix in binary format, just do double play.
track1.play();
track2.play();
Yep, as your tracks are in ByteArrays, first make two Sound object and get the data from bytearrays by loadPCMDataFromByteArray().
UPDATE: Since you don't want playback at all, the most simple way to mix the two tracks will be reading one float out of each ByteArray, then write their average into the resultant ByteArray. Using the ENTER_FRAME listener is worth it if you don't want to have your SWF stall while doing the conversion. You've said your arrays are of equal length, if so, the following code snippet should do your "simple mix" of those wavs:
var f1:Number;
var f2:Number;
b1.position=0;
b2.position=0;
var result:ByteArray=new ByteArray();
var l:int=b1.length; // cache property
var i:int=0;
while (i<l) {
i=i+4; // size of float
f1=b1.readFloat();
f2=b2.readFloat();
result.writeFloat(0.5*f1+0.5*f2);
}
Doing an enterframe approach requires your result be available between listener calls, and positions unaltered, with a temporary counter running in the loop which will control "enough converting in this frame". Like this:
var result:ByteArray;
var tracks:Vector.<ByteArray>=[];
var mixFinished:Function; // a callback
function startMixing():void {
// just make it start mixing
for (var i:int=tracks.length;i>=0;i--) tracks[i].position=0;
addEventListener(Event.ENTER_FRAME,doMixing);
result=new ByteArray();
}
function doMixing(e:Event):void {
if (tracks.length==0) {
removeEventListener(Event.ENTER_FRAME,doMixing);
return;
} // sanity check
var mixrate:Number=1.0/tracks.length;
for (var i:int=0;i<2048;i++) { // adjust number accordingly
var tm:int=0; // how many tracks mixed
var f:int=0;
for (var j:int=tracks.length-1;j>=0;j--) {
if (tracks[j].position<tracks[j].length) {
// this track isn't finished
tm++;
f+=tracks[j].readFloat();
}
}
if (tm==0) { // all tracks reached end, stop mixing
removeEventListener(Event.ENTER_FRAME,doMixing);
if (mixFinished!=null) mixFinished(); // do a callback
return;
}
result.writeFloat(f*mixrate);
}
}
With this, you fill tracks, set up mixFinished and call startMixing, then wait until mixFinished would get called, by that time your sound should be mixed properly. If you feel your mixing process should go faster, increase the 2048 value in code appropriately.
As a PHP programmer I'm very habituated to the fact that the program flow goes line by line, if I call function1() that have to return some value I know the program wont continue until that function makes a return.
Now, im developing a AS3 app using AIR, I need to download some images if some conditions are met, don't know how many, so im using a For like this:
for (var w:int=0; w < newData_array[2]['content'].length; w++ ) {
for (var j:int=0; j < oldData_array[2]['content'].length; j++ ) {
if((oldData_array[2]['content'][j]['id'] == newData_array[2]['content'][w]['id']) && (oldData_array[2]['content'][j]['last_mod'] != newData_array[2]['content'][w]['last_mod'])){
//need to download a image...
}
}
}
As you can see im just comparing each element from each array (newData_array and oldData_array). If the condition met, I need to download something, for that I'm using URLloader and as you know this function is asynchronous, adding a listener, an event will be triggered when the download is complete, the problem is very clear, since the urlloader wont stop the for cycle (like I would expect on a PHP alike language) I'm just going to download a bunch of images at the same time creating a disaster because I wont know when to save. So I need to use by any mean the listener, but since I'm not very habituated to this kind of procedures I'm pretty munch stuck.
Im not interested on the save to disk routines, that part is pretty much done, I just want to understand how I should structure this algorithm to make this work.
This annoyed me too, but one has to realize that you can't do something to something that doesn't exist in memory yet, and these loading operations can take quite some time. Being a single-threaded stack, Flash Player's load operations would require that the entire interface to freeze during the load (if restricted to the loop).
Obviously there's data available to the loop that dictates what you do with the image. The solution I've been using is create a custom load function that starts the load, and returns a proxy image . Your loop gets a container back and you can freely place your image where you want.
In the meantime, your loader listener has kept track of the active images loading, and their associated proxies. When loaded, swap the image in.
Your loop would look something like this...
for (var w:int in newData_array[2]['content']) {
for (var j:int in oldData_array[2]['content']) {
if ((oldData_array[2]['content'][j]['id'] == newData_array[2]['content'][w]['id']) && (oldData_array[2]['content'][j]['last_mod'] != newData_array[2]['content'][w]['last_mod'])){
var proxy:MovieClip = loadImage("image/path.jpg");
// Do stuff to proxy.
}
}
}
And your function + listener would look something like this...
var proxies:Object = {};
function loadImage(path:String):MovieClip {
// load Image
var proxy:MovieClip = new MovieClip();
proxies.path = proxy;
// Load Image
}
function imageLoaded(e:Event):void {
// Once loaded, use the filename as the proxy object's key to find the MovieClip to attach the image.
proxies[e.data.loaderInfo.filename].addChild(e.data);
}
This is just off the top of my head, so you'll need to find the actual variable names, but I hope that makes sense.
I am not really sure if I understood your problem but it seems to me that you simply add the according listener in your inner loop.
//take care this is pseudocode
var parent = ... // some stage object
for (var w:int=0; w < size1; w++ ) {
for (var j:int=0; j < size2; j++ ) {
if(some_condition){
request = new URLRequest(getNextImagePath();
urlLoader = new URLLoader();
urlLoader.addEventListener(Event.COMPLETE, onComplete);
urlLoader.load(request);
}
}
}
function onComplete(event:Event) {
parent.addChild(createImageFromData(this.data));
}
I solved the problem using an third party library that pretty munch handles this problem.
https://github.com/arthur-debert/BulkLoader
I need to create a variable:
var numDots0:Number=0;
But when a button is clicked the variable numDots0 becomes numDots1, then numDots2 on a second click, and so on. I then need to be able to grab that new variable name and use it in a function.
That's a really, really weird request, but anyways:
You can use the key name of an Object to store the property and then change that:
var obj:Object = { numDots0: 0 };
And then when you want to change the name:
delete obj.numDots0;
obj.numDots1 = 1;
Or to easily increment you can use this:
var i:int = 0;
function increase():void
{
delete obj["numDots" + i];
obj["numDots" + (++i)] = i;
}
To access:
trace(obj.numDotsX); // where X is the most recent variable name.
I see absolutely no benefit or need for this, so I strongly suggest taking a look at what you're trying to do and making sure it makes sense and doesn't have a different application.
I am pretty sure you are going the wrong way about the problem you are trying to solve. Dynamic variable names are not something you read in the best practices book.
Anyway to answer your question in AS2 you could use the command eval which would evaluate a string as ActionScript, so you would use something like:
function onClicked(e:MouseEvent):void
{
counter++;
eval("var numDots" + counter +"+:Number=0;");
}
In AS3 that command has been removed (because it leads to bad coding practices - like the things you are trying to do), nevertheless someone implemented an evaluator in AS3:
http://eval.hurlant.com/
With this evaluator add the library to your project and add the following to the snippet above:
function eval(expression:String):void
{
var evaluator:com.hurlant.eval.Evaluator = new com.hurlant.eval.Evaluator();
var bytes:ByteArray = evaluator.eval(expression);
bytes = ByteLoader.wrapInSWF([bytes]);
var context:LoaderContext = null
var loader:Loader = new Loader();
loader.loadBytes(bytes, context);
}
the answer is to not do what you are trying to do and use an array, hash or vector instead. give us a bit more context, or the reason you want to achieve exactly what you want to and why you might believe you'd need a dynamic variable name like that. you shouldn't be using evals or anything that changes variable name at runtime because the gods of programming will strike you down where you stand. i.e., your program is going to break, and when it does, it's going to be harder to debug for sure.
if you are sure this is what you want to do, then i'm wrong, haha. good luck!
I experienced a problem with the name property in as3, I created this "dot" movieclip and I exported to a class,
then I anonymously created a bunch of dots using a loop. I assigned numbers as name to each dots
private function callDots(num:Number):void
{
for (var i = 0; i < subImagesTotal[num]; i++)
{
var d:Dot = new Dot();
d.x = i*23;
d.y = 0;
d.name = i;
dotContainer.addChild(d]);
}
}
so far so good, I checked that if I trace the name here, I will get the number I want.
However, it's not giving me the numbers if I trace it in other functions.
I added all of my dots to "dotContainer", and if I click on one of the dots, it will call this function
private function callFullSub(e:MouseEvent):void
{
var full_loader:Loader = new Loader();
var temp:XMLList = subImages[sub];
var full_url = temp[e.target.name].#IMG;
full_loader.load(new URLRequest(full_url));
full_loader.contentLoaderInfo.addEventListener(Event.INIT, fullLoaded);
}
e.target.name is suppose to be numbers like 1 or 2, but it's giving me "instance66" "instance70" and I
have no idea why. Because I did the same thing with loaders before and it totally worked.
Any ideas? Thanks.
christine
The e.target returns the inner most object clicked on, this could be a TextField, another MovieClip or posibly a shape (I'm not 100% of the last one) inside the "Dot".
To prevent this you could try to set the mouseChildren property to false on the Dot's when you add them. This should insure that nothing inside the dots can dispatch the click event, and thus the Dot's should do it.
Perhaps you could also in the event handler verify the target type with code like this:
private function callFullSub(e:MouseEvent):void
{
if(!e.target is Dot)
throw new Error("target in callFullSub is not Dot but: " + e.target.toString());
//The rest of you code here
}
The answer is [e.currentTarget.name] I perform this all the time!
Should return "Dot1" "Dot2", etc.
If the value you wish to return is a number or other data type other than a string (name of object) use [e.currentTarget.name.substr(3,1).toString()]
Should return 1, 2, etc.
Navee
I tried to reproduce your problem first with Flex using runtime created movieClips and then with Flash using Dot movieClip symbols exported for ActionScript. Neither application exhibited the problem.
You may already know names like "instance66" "instance70" are default enumerated instance names. So, whatever is dispatching the MouseEvent is NOT the dot instance. Perhaps you are unintentionally assigning callFullSub to the wrong targets, maybe your containers? Try assigning it to dot instance right after you create them, like this:
private function callDots(num:Number):void
{
for (var i = 0; i < subImagesTotal[num]; i++)
{
var d:Dot = new Dot();
d.x = i*23;
d.y = 0;
d.name = i;
d.addEventListener(MouseEvent.CLICK, callFullSub);
dotContainer.addChild(d]);
}
}
Be sure to temporarily comment out your original assignment.
Try this might work,..
d.name = i.toString();
You have not shown enough of your code for me to be able to give you a DEFINATE answer, I will however say this.
//After you create each loader you need to set its mouseEnabled
//property to false if you do not want it to be the target of
//Mouse Events, which may be superseding the actual intended target;
var full_loader:Loader = new Loader();
full_loader.mouseEnabled = false;
//Also you could name the loaders and see if what comes back when you click is the same.
ALSO! Add this to your Mouse Event handler for CLICK or MOUSE_DOWN:
trace(e.target is Loader); //If traces true you have an answer
I believe that the mouse events are being dispatched by the Loaders.
please provide more of your code, the code where the Loader.contentLoaderInfo's COMPLETE handler fires. I assume this is where you adding the loaders to the display list as I cannot see that now.