Flex :: Most Scalable Web Stack For High Performance Flash?
Jun 11, 2009
I am in the planning phase of a new multi-user client/server app using Flash via Flex and AIR. I am trying to decide which web platform/stack is the best suited for this? I have used RoR in the past, but as i understand, RoR is single-threaded, and is therefore not the ideal choice for handling potentially thousands of simultaneous requests. I have done some reading about Scala and Lift and that is an intriguing option, but i was wondering if there are other languages/frameworks out there that would work well for my project?
When looking for encryption related classes/functions in action script / air / flash, I saw the as3crypto project. This one provides a v. nice set of options, but I am a bit concerned on what the numbers presented means when these are used to decrypt a local media file when its selected about to be played. I am looking for security vs. performance balance.
For video/music, it needs to decode at a fast enough pace so the player plays it smoothly - which is something that depends on the format used, but is in all cases less than the delay of having to wait to decode the whole file.
1.How to load image resources? And in which case we should use "[Embed]" to insertresources?2.which technology can improve the performance of the game flash game development ?
I'm running Flash CS4 on a laptop and find it gets sluggish. I find when I restart my computer, I can work at a good speed for a while, but eventually it becomes very laggy - why is this?
Can I dump the cache files or something to simulate the restart? I've reduced the undo history to 10 - any other tips for CS4 on a mediocre machine?
I am creating a card game everything is fine but I am not able to create a stack of cards as follows: If I have 4 cards that are represented in an array such as 4,5,6,7 of Spades then I want the card with the least priority to be placed on top and the highest priority card placed behind the first one.
Will I take a big hit in performance using nested ViewStacks? Should I strive to handle all navigation in one ViewStack and push children manually or will the affected performance be negligible?
We have a medium size Flex 3.6 application that contains around 20 different page views (managed via a single lazy ViewStack) each having multiple components. Most use custom renderers.All model data is loaded at startup and changes to model instances are communicated via binding and/or collection change events.Once the user has viewed each page at least once, all page views are instantiated and happily listen to update events.Which in effect means that each time a model instance changes, all interested views receive that event and compute derived data or trigger item-renderers.I have tested and confirmed this behaviour in a proof-of-concept application. Even when setting a list to being invisible, it still listens to collection change events and invalidates any renderer affected.What would you do?
Apple says that a 144x144 application icon is now required for the high-res iPad. But adding an <image144x144> element to the application descriptor file in Flex 4.6 gives an error 103: application.icon.image144x144 is an unexpected element/attribute.Is there a workaround for this? Perhaps through the iPhone InfoAdditions area of the application descriptor?
I looked at this demo: [URL] Flex seems very slow compared to silverlight 3. Unfortunately can't see pure flash but should flex be forbidden if performance is top requirements compared to Flash ?
I'm binding two AutoCompleteModified objects to one another; meaning you type in one and it selects the correct object in the other. It works fine when I define it in MXML: However, a user can add a new row to a Grid and then I set up the binding and objects via actionscript and it gives an 'undefined' error: ChangeWatcher line 427/wrapHandler.
var innerHBox:HBox = new HBox(); var dtc_acm:AutoCompleteModified = new AutoCompleteModified(); dtc_acm.dataProvider = data2; dtc_acm.labelField = 'id'; var cp_acm:AutoCompleteModified = new AutoCompleteModified(); [Code] .....
If I only keep it 1-way binding then it works fine. But both throw this error. Is there something about not only doing it 2-way in actionscript, but adding components that aren't on the stage yet?
I am trying to use a combobox in flex with an array to change to a canvas in a view stack. Can I do this with some custom action script? The UI I am designing could really benefit form this.
I've created a flash file which loads an image using loadMovie, this all works fine but what I need to be able to do is load different size images into the swf. I have tried changing the size of the swf in the embed tag and using the 'noscale' option, however the stage appears to be moved to the center (see screenshot), I need it to be at the top left.
I've also tried passing the new width and height to the swf via flashvars and then setting the size of the stage to these values, however this makes no difference to the outcome.
how I can create a flash movie that I can scale using the width and height parameters that doesn't scale the content and keeps the content in the top left corner?
On occasion, I have wanted to push a closure onto ActionScript's event stack so that it will be executed after the current event handler. Right now I use setTimeout(closure, 0). Is there a more direct way of doing this?
I'm trying to develop a card game with Flex, and I was wondering if there's a way to create an horizontal list (the cards that I have in my hand) having the elements overlapped, like you can see in this example made with openflux: [URL]. The thing that's missing here is the possibility to swap the cards with drag and drop. What I could do to get a similar effect with an horizontal list based component?
I'm looking to take an object that contains String and Integer context and that has pushed upon a Stack and pop those specific contents into a display that the user can see. The display consists of two textareas and a label.I can't figure out how to access the individual parts of the Object to display them though..[code]
As a UI specialist, I am often asked to build tool-tip displays and other sorts of popups that display text. One of styles clients seem most keen on is text in a comic-book balloon. I would like to create this balloons programmatically (as opposed to embedding or linking to rendered graphics), because these balloons will have to change size at runtime, depending on how much text they have to hold.
Balloons are easy to draw for the most part: circles, rectangles or rounded-corner rectangles. The tough part, for me, is the tail (the little arrow-like part of the comic balloon that points towards the speaker). If you google comic balloon, you see that there are many varieties of tails. They ones clients request from me most often are curved. E.g...
[URL]
The tail will always be on the bottom of the balloon, and it will sometimes point left and sometimes point right. I have been trying to come up with tail-drawing algorithms for a while, but I'm not happy with the results. I'm basically stumbling around in the dark, changing variables, looking at the results, and using trial and error to try to move closer to the magic numbers that will work. "Work" just means a result that looks pleasing, which I realize is subjective. Most of my clients will be a happy with anything that looks reasonably good and professional.
I want this result to scale. And it would be great if it could work with as few inputs as possible, maybe just isFacingLeft, tailWidth and tailHeight (Which could maybe be a percentage of the whole balloon). Maybe an adjustable curveAmount.
If it matters, I'm using Flash/Actionscript, but any system that has some sort of turtle graphics engine should work pretty much the same way: I'm working with that standard flipped Cartesian grid (y increases downward), x and y coordinates, the ability to move a pen, draw lines and draw curves.One caveat: Flash only allows me to draw 3-point bezier curves -- start point, control point, end point.
Note: balloons won't have to scale after the are drawn.
I have a flash application which consist of Grid Components, Button, Label, and Combo-box Components. All these components are used more than 70 times(simultaneously) with in the application. So Its takes too much of memory. So How can I test the memory usage of each component at the time of running. Is there any plug-in available for browsers to find the memory usage. I'm using flash CS3 and ActionScript 3.0. The application suppose to run in browsers.
In Flex 4.5 for mobile is it possible to check if there is > 1 view on a navigation stack and display a back button accordingly? If so how can I do this?My application is based ons:ViewNavigatorApplicationI'm adding a back button like this
I'm devloping some library classes for flocking/steering behaviours on large numbers of objects (2000+). I'm finding that at < 500 instances, performance is reasonable. As the numbers increase, framerate bogs down.
I've seen remarkable performance with libraries such as Flint or Box2D with ridiculous #'s of particles / objects, so it should be possible to optimize / refactor my code to be a bit better.
I'm aware of the basic optimizations, such as bitwise operations and optimized for loops. Are there any more fundamental approaches I should be considering? For example, currently each instance is a vector-based MovieClip. Would working with BitmapData be more efficient?
at the moment I've got a (perhaps) requirement for specifying precedence to certain queries within a movie, which will be dealing with the upload of assets through flash to a php backend.
Does anyone have any info, or maybe a pointer in the right direction with regards to how flash deals with the internal URLRequest stack. If that's even how it works.
I may be vastly over simplifying the way flash works, but the only analogy I have is my own exploration into protoyping an AJAX query stack a couple of years ago, where you'd be able to alter the stack ordering depending on request priority as it were.
I am working on an Adobe AIR (2.0) application that contains a feature to allow users to print documents (such as salary slips). Those documents are originally in PDF format. Due to circumstances we cannot directly display those PDFs in the AIR application (for example using flash.html.HTMLLoader). Therefore we convert the PDFs to SWFs (using the pdf2swf tool, see The SWFs are loaded into the application using a mx.controls.SWFLoader, like so:
I need to compress video image data (lets say a display object) in AS3 to a Byte Array with high compression at runtime. Framerate only needs to be around 5 but 1024x768 video needs to go to < 40 Kilobyte per Second without the quality being too bad. I wrote a custom encoder and got it to around 80-100 Kilobyte per Second for 1024*768 which still is too much and I don't see a lot of improvements to be mad to my encoder.
Using JPG or PNG Encoder gives way higher KB/s. Is there any open source way to to decode and encode video in as3 at runtime ? E.g. a H.264 as3 encoder and decoder ? Or other codecs? Or maybe a C# source code of h.264 encoder and decoder ? I think I could port it to as3. Doesnt need to be h.264, just something with good quality when running at 5 Frames/Sec and 40 Kilobyte...
at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at flash.net::URLLoader/onComplete()
This is particularly difficult to debug because when I run in debug mode it does not happen at all. It only happens when compiled as a release.
[Code]...
applicationComplete seems to be an even better event than creationComplete to put application initialization code. See this blog entry for some explanation, and and this video (around 4:25) by an Adobe Tech Evangelist for an example of simple "start of application" data initialization.
