Category Archives: Software Engineering

AS3, JavaScript

How to use ExternalInterface to integrate AS3 with JavaScript

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Here’s a quick snippet of code for setting up intercommunication between a SWF and JavaScript, using ExternalInterface:

import flash.external.ExternalInterface;

// Calling a JavaScript function from AS3 (with optional parameters)
if (ExternalInterface.available) ExternalInterface.call("javascriptFunction", param1, param2);

// Implementing a JavaScript callback in AS3 (flashFunction is called when JavaScript calls javascriptFunction)
if (ExternalInterface.available) ExternalInterface.addCallback("javascriptFunction", flashFunction);
3D, AS3, Webcam

Head tracking in 3D

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I started trying to find useful things to do with face detection, but with limited success. I tried using the Libspark Haar Cascades implementation of face detection with Papervision3D to create a sort of head tracking effect, but it’s a little flaky – partly because of poor tracking accuracy and partly because it’s too CPU intensive. You can view it on its own page here.

AS3

How Wonderfl

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I’ve been playing around a little with the online Flash building tool, Wonderfl. If you haven’t seen it already, I urge you to create an account and have a go. You can browse the weird things that people have created, fork other users’ code, or write you own from scratch and see the results compiled online in realtime. It’s a great way to learn graphics coding in AS3 I reckon.

Wonderfl