WadC

Introduction
WadC is a programming language designed for constructing Doom levels. It was written by Wouter "Aardappel" van Oortmerssen.

The system takes the form of a two pane window. In the left pane, WadC code can be written. A preview of the resulting level is displayed in the right pane.

WadC has advantages over traditional level editors in that it is easy to form repeating structures: a function can be written to create a pillar, for example, and invoked to create many pillars.

Notable levels
Perhaps the best known WadC map is by none other than Aardappel himself, and is his submission to Doomworld's 10 Sectors competition.