This evening I decided to go through a few old folders on my laptop and delete anything I don't need anymore. One of the items was a zip file of some source code for a ray tracer written in Java. I downloaded it a few years ago from another blog that's no longer online. I believe it was originally written in 2008 by Barak Cohen and Gur Dotan.
As the authors blog is no longer available I couldn't bring myself to deleting it and have put a copy on GitHub in case any other people out there want to take a look. I've rejigged the project structure a little and removed all the Eclipse related files in favour of a Gradle configuration.