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Scaleform with Haxe in UDK !

Hey guys !

Just a short demonstration of my previous tutorial on Scaleform HUD with Haxe !


Haxe & Scaleform : A free alternative to Adobe Flash CC

Tutorial Content

In this tutorial you will learn how to use Haxe to create Scaleform compliant swf’s. I will teach you how to embed images and fonts as well.

I made this tutorial because there are some tricky things to know about embedding images and there is also a specific version of Haxe generated to be compliant with Scaleform.

Thanks to Jan Flanders and Simn from who made this tutorial possible by their help and by creating a Scaleform compliant haxe version.

What is Haxe ?

Haxe is a powerful modern language with many compelling features. It is aimed at giving developers a tool to create websites & applications using a single unified programming language.

Haxe will allow you to generate a swf for Scaleform with a minimal installation setup. You will have access to the complete AS3 API.

Installation of Haxe and the modified version of Haxe

  1. The first thing to do is to download the latest Haxe installer here :
  2. Then install and choose the default option that includes Neko
  3. Download the modified version of Haxe here :
  4. Navigate to the Haxe installation folder and rename haxe.exe and std folder to haxeOld.exe and stdOld folder
  5. Extract the content of the modified Haxe version in the installation folder which contains the haxe.exe and std folder
  6. Check if Haxe is installed by opening a windows CMD and typing haxe, then validate. You should see a brief description of the Haxe version. It may require a reboot for windows to have the haxe.exe in the PATH.

Installation of hxswfml (required to embed Bitmap)

  1. Download hxswfml.n here
  2. Create a folder named HaxeScaleform and put hxswfml.n inside

Creation of a simple test for Scaleform that contain a Bitmap and a TextField

  1. In the HaxeScaleform folder (created in the previous step) create a file named lib.xml and add the following content inside :
            <bitmapdata file="logo.png" class="MyBitmapData"/>
            <font file="CALIBRI.TTF" class="MyFont"/>
  2. Download this picture and put it in the HaxeScaleform folder
  3. Get Calibri normal from C:\Windows\Fonts\Calibri and copy it to HaxeScaleform folder
  4. Open a Windows command, go to the HaxeScaleform folder and type :
    neko hxswfml.n xml2lib lib.xml lib.swf
  5. This will create a swf lib.swf that contains our bitmap and font. You can add as many as you want in the lib.xml
  6. Create a file named SimpleTest.hx in the HaxeScaleform folder and add the following content inside :
    class SimpleTest
        // Call on mouse move
        static function onMouseMove(
            // Get the main MovieClip
            var mc:flash.display.MovieClip = flash.Lib.current;
            // Draw a circle at the mouse coordinate
  , 0.5);
   - mc.stage.stageWidth / 2.0, mc.stage.mouseY - mc.stage.stageHeight / 2.0, mc.stage.stageWidth / 20.0);
            // Apply a rotation to the main MovieClip mc to add a cool 3D effect
            mc.rotationY = (mc.stage.mouseX - mc.stage.stageWidth / 2.0) * 0.2;
            mc.rotationX = -(mc.stage.mouseY - mc.stage.stageHeight / 2.0) * 0.2;
        // Main function
        static function main()
        // Get the main MovieClip
            var mc:flash.display.MovieClip = flash.Lib.current;
            // Draw all content (For UDK)
            mc.stage.scaleMode = flash.display.StageScaleMode.EXACT_FIT;
            // Center the main MovieClip
            mc.x = mc.stage.stageWidth / 2.0;
            mc.y = mc.stage.stageHeight / 2.0;
            // Create a bitmapData that contains the bitmap content stored in lib.swf
            var bitmapData:flash.display.BitmapData = new MyBitmapData(0, 0);
            // Create a bitmap object to add to the main MovieClip
            var bitmap:flash.display.Bitmap = new flash.display.Bitmap(bitmapData);
            // Center it
            bitmap.x = - bitmapData.width / 2.0;
            bitmap.y = - bitmapData.height / 2.0;
            // Add Some alpha
            bitmap.alpha = 0.5;
            // Add as a child of the main MovieClip
            // Create a font from the font stored in lib.swf
            var myFont = new MyFont();
            // Create a TextFormat for our textfield using the font
            var format = new flash.text.TextFormat(myFont.fontName);
            // Increase the font size
            format.size = 20;
            // Create a TextField to display text on Screen
            var textfield = new flash.text.TextField();
            textfield.embedFonts = true;
            // Set the TextFormat to use
            textfield.defaultTextFormat = format;
            textfield.text = "Hello";
            // Add some 3D effect
            textfield.z = -10.0;
            // Center text
            textfield.x = -textfield.textWidth / 2.0;
            // Add TextField as child of main MovieClip
            // Add listener for Mouse move event
            mc.stage.addEventListener(, onMouseMove);

    The above code is fully documented so it should be easy to understand. This tutorial is not aimed at teaching you Haxe. More information for learning haxe can be found here :

  7. Create a file named build.hxml in HaxeScaleform folder and add the following content inside :
    -D swf-use-doabc
    -swf-lib lib.swf
    -swf SimpleTest.swf
    -main SimpleTest</pre>

    Now take a look at the compilation options :

    -D swf-use-doabc” Is the most important field in this tutorial. This is a flag that is only available in the Haxe version generated by Jan Flanders, it allows Scaleform compliant swf files to be generated by Haxe. Without this flag you will get this error :

    Error: ReferenceError: Error #1065: Variable boot_2178 is not defined.

    -swf-lib lib.swf” Is used to link our SimpleTest.hx with the lib.swf that contains the bitmap and font. (there can be several libs.)

    -swf SimpleTest.swf” Specifies the name of the output SWF

    -main SimpleTest” Is used to specify the name of the Main class, this class must contain a static main function

  8. Build our SimpleTest by opening a Windows CMD in your HaxeScaleform folder and type the following :
    haxe build.hxml

    It will generate your SimpleTest.swf.

    Now let’s test it !

    Right click on SimpleTest.swf and select ‘open with’, navigate to your UDK folder and select \Binaries\GFx\GFxMediaPlayerOpenGL.exe

    You can also launch GFxMediaPlayerOpenGL.exe and then drag and drop SimpleTest.swf inside.

    You should see this :

Import into UDK

  1. Navigate to your UDK folder at UDKGame\
  2.  Create a folder named Flash
  3.  Create a subfolder named SimpleTest (or whatever you want)
  4.  Copy SimpleTest.swf inside the SimpleTest folder
  5.  Launch the UDK Editor, open Content Browser and import SimpleTest.swf, there should be a warning wich is (apparently) not important , to avoid this warning you have to copy all bitmap in the lib.xml to UDKGame\Flash\SimpleTest\ under a folder with the name of your swf, here UDKGame\Flash\SimpleTest\SimpleTest, pay attention that the bitmap should have the name of the class in lib.xml. Here logo.png will become MyBitmap.png.
  6. Open the Unreal Kismet and add an event ‘Level Loaded‘, add an action ‘Open GFx Movie‘, connect ‘Loaded and Visible‘ to In of ‘Open GFx Movie‘.
  7. Set the Movie in Open GFx Movie property to SwfMovie’SimpleTest.SimpleTest’
  8. Launch the game ! And TADA !

Congratulations, you finished this tutorial !

If you have any trouble, make sure you follow each step of this tutorial! You can ask anyway.

I suggest you to use SublimeText and Haxe addon for developing your SWF for scaleform, it has great autocomplete features !