Droste / Escher Effect in AGAL

by Devon O.· December 31, 2015· in Actionscript, Shaders· 0 comments tags: agal, effect
One last bonus post for the new year, seeing as how I remembered I had a blog. This is really just a snippet I would ordinarily post on Wonderfl, but Wonderfl seems not to be working for me lately (if anyone wants to check out my Wonderfl profile and let me know if they can view any of my posted codes, I’d appreciate it. But I can’t). [crayon-61ef545c1d7c6461377456/] Happy New Year!
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Ending the Year with Dynamic Multi-Pass Shaders in Starling

by Devon O.· December 31, 2015· in Actionscript, Shaders· 6 comments
So, the last day of 2015 and, I believe, just my second post of the year. I think there’s some law which states you have to make at least two blog posts per year to legally say you maintain a blog, so I’m a bit pressed for time. I would love to say the reason for my absence is all the work I’ve been doing on a secret project which has been taking up all my time – and that would actually be at least partially true. But, let’s face it, I’m a bit of a lazy man, and also have to wonder if anyone, besides myself, that is, actually still reads Flash blogs these days. Hopefully someone. A Little Bit About Project X For the past 3 years or so, in my spare time, an hour here, 2 hours there, I’ve been working on a bit of a casual mobile game. While I’m not at the point of releasing or even revealing too much about it, I will say you will eventually get the chance to play a big-nosed bug on a motorcycle (if anyone’s actually able to guess the game title from that little tidbit, I’ll give out […]
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Some Photographic Shaders

by Devon O.· September 13, 2014· in Actionscript, Shaders· 12 comments
A couple weeks ago I was contacted and asked to write some filters for Starling that could be used in a mobile camera application. To be honest, I’m not sure what’s become of the app as I’ve lost contact with the developer, unfortunately. A part of the deal, however, was that I eventually open source the filters, so I’m going to go ahead and do that now. So, to my Starling Filters repo on Github, I’ve now added seven new photographic effects: AnselFilter is a highly configurable way of making black and white images. BleachFilter will bleach the color out of images in a fairly interesting way. BloomFilter a relatively standard bloom effect with adjustable color. LomoFilter does a bit of toy camera/Lomo/Vintage color adjustment. NoiseFilter will add a custom amount of grain/noise to an image. Animating the seed parameters can produce a nice static effect. TiltShiftFilter will produce a decent tilt shift blur. To be effective, this filter requires multiple passes, though, so probably isn’t that useful in performance critical situations. VignetteFilter creates a standard vignette effect with optional sepia colorizing. I also sat down and created a filter browser demo app thing so that you can easily see how different […]
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Starling Filter Collection

by Devon O.· July 05, 2013· in Actionscript, Shaders· 9 comments tags: agal, starling
I mentioned this earlier, but it was really just a footnote at the bottom of a previous post, so it may have been easily overlooked. In any case, I’ve set up a Github repo containing a collection of filters for the Starling framework I’ve written (or ported as the case may be) which may be used for personal or professional projects. Of course, if you’re not a fan of Starling or are using another Stage3D framework, you could always just grab the AGAL from these and use it elsewhere. At the the moment, the collection contains these items: Warp Filter: does bezier curve warping on the left and right edges of the display object being filtered. Could be animated to produce a Mac ‘genie’ style effect. example God Rays Filter: creates a god rays or fake volumetric lighting effect on the filtered display object. Not compatible with Context3DProfile.BASELINE_CONSTRAINED mode. example Two Spotlight Filters: The first is an oldie that has a decent flicker effect example The thing I disliked most about the original version though, is that on rectangular textures, the effect will be oval shaped (stretched by the texture itself). The new version (Spotlight2Filter.as) remains round on any texture and […]
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Warp Filter for Starling

by Devon O.· May 26, 2013· in Actionscript, Flash, Shaders· 5 comments tags: agal, starling
So, perusing teh internets once again, looking for something interesting to play around with, I came across this blog post of Pavan Podila (from 2008!). In the post, Pavan presents a WPF pixel shader which warps an image using bezier curves. I thought I’d have a go and reproduce the effect in AGAL and plunk it into a Starling filter. Essentially, the filter adds 8 control/anchor points to the filtered display object – 4 on the left edge and 4 on the right. You can move those points from 0 (far left) to 1 (far right) and the image will warp and curve to fit those points. You can check out the end product here. In theory, with a little patience and finesse, you could animate those points to create a nice looking Mac style genie effect. Or, whatever. As I was working on that filter, though, I realized I had a decent sized Starling filter collection built up and spread out all over the shop. For that reason, I decided to put them all together and upload them to Github. So, now, you can download all the filters I’ve posted about (and one or two that I haven’t), including […]
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Devon O. Wolfgang

AIR | Unity3D | AR/VR

Unity Certified Developer

Technical Reviewer of “The Essential Guide to Flash CS4 AIR Development” and “Starling Game Development Essentials”

Reviewer of “The Starling Handbook”

Unity Engineer at Touch Press.

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