Thursday, December 15, 2011

How to Create a Simple Video Game with JRuby

Ruby isn't known for its game development chops despite having a handful of interesting libraries suited to it. Java, on the other hand, has a thriving and popular game development scene flooded with powerful libraries, tutorials and forums. Can we drag some of Java's thunder kicking and screaming over to the world of Ruby? Yep! - thanks to JRuby. Let's run through the steps to build a simple 'bat and ball' game now.

The Technologies We'll Be Using


If you're part of the "meh, JRuby" brigade, suspend your disbelief for a minute. JRuby is easy to install, easy to use, and isn't going to trample all over your system or suck up all your memory. It will be OK!

One of JRuby's killer features is its ability to use Java libraries and generally dwell as a first class citizen on the JVM. JRuby lets us use performant Java powered game development libraries in a Rubyesque way, lean on Java-based tutorials, and basically have our cake and eat it too.

To install JRuby, I recommend RVM (Ruby Version Manager). I think the JRuby core team prefer you to use their own installer but rvm install jruby has always proven quick and effective for me. Once you get it installed, rvm use jruby and you're done.
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