Extended General Line and Sector Types system

XG, short for "Extended General Line and Sector Types system", is a system in the Doomsday and Risen3D source ports that allow the user to create of new line and sector types. It is not actually a scripting language; one could consider it a considerably more powerful and flexible, but more complicated, version of Boom's "Generic linedef types".

Introduction to XG: http://www.dengine.net/dew/index.php?title=Introduction_to_XG XG Overview: http://www.dengine.net/dew/index.php?title=XG