toggle

AAPL Stock: 112.34 ( + 4.62 )

Printed from http://www.macnn.com

Doom 3 game engine released under GPL3

updated 09:30 pm EST, Tue November 22, 2011

Shadow rendering technique substituted

Game maker Id Software has published the Doom 3 game engine source code under the GPL3 license, allowing developers to incorporate its mechanics into their own projects. The release does not contain any game data, according to the release notes, as those elements are still covered under the Doom 3 commercial end-user license agreement. In addition, the shadow-rendering technique known as "Carmack's Reverse" has been substituted for patent reasons.

The company has traditionally promised and eventually published the source code to its game engines, and promised to do so with the Doom 3 engine as well. A roadblock that could have prevented the code's release for Doom 3 was that both lead programmer John Carmack and another company independently developed a shadow-rendering technique, but the other game company patented their version.

The company didn't want to expose itself to possible litigation by open-sourcing a very similar technique. Carmack later found a solution to the problem by further re-coding the technique to be different enough from the original that it could be handed off to Id co-founder Timothee Besset, who has traditionally handled all the Linux and open-source porting and other cleanup of the various game engines and did most of the work on the Doom 3 release.

The engine's source code is now available for download on GitHub.





by MacNN Staff

POST TOOLS:

TAGS :

toggle

Comments

Login Here

Not a member of the MacNN forums? Register now for free.

toggle

Network Headlines

Follow us on Facebook

toggle

Most Popular

Advertisement

Recent Reviews

Blue Yeti Studio

Despite being very familiar with Blue Microphones' lower-end products -- we've long recommended the company's Snowball line of mics ...

ZTE Spro 2 Smart Projector

Home theaters are becoming more and more accessible these days, but maybe you've been a bit wary about buying a home projector. And h ...

MSI Geforce GTX 970 100ME

When Nvidia announced a new line of video cards in September 2014, many people thought things would continue to be business as usual i ...

toggle

Most Commented