OpenSG

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OpenSG is a scene graph system to create realtime graphics programs, e.g. for virtual reality applications. It is developed following Open Source principles, LGPL licensed, and can be used freely. It runs on Microsoft Windows, Linux, Solaris and MacOS X and is based on OpenGL.

It's main features is advanced multithreading and clustering support (with sort-first and sort-last rendering, amongst other techniques), although it is perfectly useable in a single-threaded single-system application as well.

[edit] History

It was started, just like many other systems, at the end of the scenegraph extinction in 1999 when Microsoft and SGI's Fahrenheit graphics API project died. Given that there was no other scene graph system on the market nor on the horizon with the features the authors wanted, they decided to start their own.

OpenSG should not be confused with OpenSceneGraph which is entirely different scene graph API, somewhat similar to OpenGL_Performer. Development on both started about the same time, and both chose similar names.