Wallrunning
From DoomWiki.org
Wallrunning can occur when a player runs along a straight wall (either normally or by straferunning) while in contact with it. The player will be accelerated to a speed that is greater than normally attainable.
Wallrunning is triggered when:
- The player is running north along a one-sided north-south wall, south along a two-sided north-south wall, or east along a one-sided east-west wall and;
- The player is aligned either precisely parallel to, 38.7 degrees away from, or 45 degrees away from the wall.
After a brief moment, the player will begin moving at a very high speed, ceasing only when the player stops running, encounters a corner, or changes direction (e.g. by being hit by a monster).
An agile player can exploit this bug as a speedrunning or deathmatch tactic, taking advantage of north-south and east-west walls to dodge projectile attacks or move quickly between distant areas of a map. Its use in deathmatch play is somewhat limited, however, because it requires that:
- The level contains a straight north-south or east-west wall in the appropriate place(s);
- The player determines which way is north, possibly during a fast-moving firefight;
- The player rapidly orients himself at the desired angle to the wall and;
- The player waits for the acceleration to begin.
The deathmatch tutorials at doom2.net propose that wallrunning also works occasionally on sidedefs of other orientations. In addition, because sprite “footprints” on a map are square rather than round, this same acceleration can occur along one edge of a long row of aligned inanimate objects, where it is referred to as “thingrunning”.
Demo files
- The wallrunning bug (File:D213wrb.lmp) on MAP13: Downtown
- The wallrunning bug (File:E3m6wrb.lmp) on E3M6: Mt. Erebus
External links
- A discussion of thingrunning (with demos) on the Compet-N web site