I started to look into fluid simulation a little while ago. It turned out that it's not quite as trivial as I had hoped. That is unless you go for the hacky way as I did back in 2010.

So after getting familiar with the problem and some solutions I implemented a simple fluid simulation using the canvas element. You can find it in my sandbox.

The plan for the next step is to create a WebGL version. I hope that the final result will be a worthy successor to the immensely popular (by my standards) Neon Flames experiment I did last year.

Click here to open the tool!

Image error level analysis is a technique that can help to identify manipulations to compressed (JPEG) images by detecting the distribution of error introduced after resaving the image at a specific compression rate. I stumbled across this technique in this presentation by Neal Krawetz and decided to do a quick implementation in JavaScript.

How to use this tool

To analyse an image simply drag and drop it onto the page (requires a modern browser like firefox or chrome). Then play with the quality slider to spot anomalies in the error level. The image I analyzed in the screenshot above is a picture of myself that I modified in GIMP. As you can see the error level on the fake part is quite significantly higher than on the rest of the image. There are no such anomalies on the original.

Having that said the algorithm is not exactly reliable, especially with images that have been rescaled and compressed often/intensely. So take it with a pinch of salt and feel free to have a look at the simple source code.

I decided to release some of JS WARS graphics and sounds under a creative commons attribution share alike license. If you want to use any of the other media please ask me.

Download jswars_media.zip (700kb)

This work by Jonas Wagner is licensed under a Creative Commons Attribution-Share Alike 2.5 Switzerland License.

I've integrated my Namegenerator into this website and translated it to english. May be I'll write a post about the way it works later.

I've made a major update to my website. I've got a blog again, this time using Zine. Everything is new and probably buggy. Please contact me if something doesn't work. The old version is still available: http://29a.ch/old.html