View source for Software:Strafing (gaming)

'''Strafing''' is the act of moving sideways in a video game, typically either in relation to an enemy or the game's camera. In a third-person video game the camera is positioned behind the player character, facing the direction of their forward movement, and so strafing sideways allows a player to keep the camera focused on something, such as an enemy, while moving in a different direction.

==Techniques==
===Circle strafing===
[[Image:Circlestrafing animation.gif|thumb|250px|The blue player circle strafes counterclockwise around his red adversary, while firing continually. Red, unable to keep track of the moving blue player (and failing to 'target-lead'), misses his shots.]]
Particularly in [[Software:First-person shooter|first-person shooter]]s (FPSs), '''circle strafing''' is the technique of moving around an opponent in a circle while facing them.<ref>{{cite book|last1=Lancheres|first1=Eric|title=Fragging Fundamentals|url=https://books.google.com/books?id=GZF0lver4MkC&dq=circle+strafing&source=gbs_navlinks_s|publisher=Fragging Fundamentals|page= 58|isbn=0981210406|accessdate=2014-11-24}}</ref> Circle strafing allows a player to fire continuously at an opponent while dodging counterattacks. By rapidly circling the opponent, the player evades the opponent's sights. Circle strafing is most useful in close-quarters combat, where the apparent motion of the attacking player is the greatest, and thus the chance of disorienting the opponent by making him lose track of the attacker is higher.<ref>{{cite book|last1=Carless|first1=Simon|date= 2004|title=Gaming Hacks

Circle strafing is especially effective when employed as a form of lag-jumping where the sync speed between the two players affects the defending players' ability to defend themselves. When latency is high, this can lead to the oft-seen phenomenon of two players circling each other, both missing by a considerable margin, until one player unexpectedly collides with an obstacle and is slowed sufficiently for the other to target him.{{Citation needed|date=November 2014}}

Many shooters will allow players to zoom down the sights of a gun or use a scope, usually exchanging movement speed, field of vision, and the speed of their traverse for greater accuracy. This can make a player considerably more vulnerable to circle-strafing, as objects will pass through their field of vision more quickly, they are less capable of keeping up with the target, and their lowered speed makes dodging more difficult.{{Citation needed|date=November 2014}}

====Strafing in melee combat====
The concept of circle-strafing has also extended to certain 3-D action and action/adventure video games in general, particularly ones that involve melee combat.  Circle-strafing in melee combat can be made possible with a lock-on system that snaps the camera's (and the player-character's) focus on one particular enemy, guaranteeing that most of the player character's attacks will land a direct hit on the target.  Specifically, it enables the player character to move sideways around the enemy to dodge their attacks while staying focused on the enemy.  This is seen to a crucial strategy against [[Software:Boss (video gaming)|bosses]] and otherwise powerful enemies, and is notably employed in various 3-D ''[[Software:The Legend of Zelda|The Legend of Zelda]]'' titles, starting with ''[[Software:The Legend of Zelda: Ocarina of Time|Ocarina of Time]]''.

===Straferunning===
[[Image:Perpendicular Vector Addition.svg|left|thumb|A diagrammatical explanation of straferunning.]]
Particularly in older first-person shooters (FPSs), '''straferunning''' (known as '''speed-strafing''' among players of ''[[Software:GoldenEye 007 (1997 video game)|GoldenEye 007]]'' and ''[[Software:Perfect Dark|Perfect Dark]]'', and as '''trichording''' among players of the ''[[Software:Descent (video game)|Descent]]'' series) is a technique that allows a player to run or fly faster through levels by moving forwards and sideways at the same time. The game combines these actions and the player achieves roughly 1.4 ([[Square root of 2|square root of 2]]) times greater speed compared to moving in a single direction. The method used by the game can be demonstrated using vector addition. ''[[Software:Pathways into Darkness|Pathways into Darkness]]'' was one of the first games to allow straferunning.

The games in which straferunning can be employed treat forward motion independently of sideways (strafing) motion. If, for each update of the player's location, the game moves the player forward one unit and then moves the player to the side by one unit, the overall distance moved is <math>\sqrt{2}</math>. Thus, in games with such behavior, moving sideways while simultaneously moving forward will give an overall higher speed than just moving forward, although the player will move in a direction diagonal to the direction being faced.  This feature is even more enhanced if moving along three axes (e.g. forward + left + up), providing <math>\sqrt{3}</math> (roughly 1.73) times greater speed, in games such as Descent.

This technique is not possible in all games; most and especially modern games would clamp the player's speed and acceleration to a uniform maximum when moving in any direction.

===Strafe Jumping===
'''Strafe-jumping''' is a technique used to increase a player's speed in computer games based on the [[Software:Quake engine|Quake engine]]. The technique is common in [[Software:First-person shooter|first-person shooter]]s.

==== History ====
Strafe-jumping was a result of a bug in the code base of the 1996 [[Software:First-person shooter|first-person shooter]] video game ''[[Software:Quake (video game)|Quake]]'', but it was later decided to be kept intact,<ref>{{cite web|author1=Id Software Inc.|title=Github Repository - Mentions in Code (No references to ID's opinion in Q2)|url=https://github.com/id-Software/Quake-III-Arena/blob/dbe4ddb10315479fc00086f08e25d968b4b43c49/code/game/bg_pmove.c#L260|website=Github|accessdate=4 April 2017}}</ref> as it had become a standard technique used by players. The bug itself relies on mathematics: when pressing a direction key, the game adds a [[Unit vector|unit vector]] in that direction to the player's movement speed. The final sum, however, is never normalized - this means that by directing the avatar away from the current kinetic vector but within 90 degrees of it, the player can exceed its own top speed.<ref>{{cite web|archive-url=https://web.archive.org/web/20150508100656/http://www.funender.com/quake/articles/strafing_theory.html |title=F3quake - Article: Strafing Theory |archive-date=2015-05-08 |url=http://www.funender.com/quake/articles/strafing_theory.html |url-status=live }}</ref>

==== Method ====

Strafe-jumping requires a specific combination of mouse and keyboard input. The exact technique involved depends on the game itself. In several games, there are entire maps devoted to this, much like obstacle courses.

The controls are typically as follows:
# The player presses the forward key, preparing to make the first jump.
# The player jumps, and pressing either the move left or the move right key (ergo the strafe in the term, strafe-jumping). The strafe and jump keys should be pressed at the same time, and the jump key immediately released.
# To gain maximum acceleration and speed, the player must now move the mouse gradually to the correct degree (i.e., turn) in the direction of the strafe, while still holding down the two aforementioned keys.
# For successive strafe-jumps, the player immediately jumps again on landing, swapping the direction of strafe as well as mouse turn direction if necessary to avoid obstacles.

Done correctly, this will increase the player's velocity with successive jumps. Mastering this technique requires lots of practice. Sequential strafe-jumping is mainly a matter of [[Biology:Muscle memory|muscle memory]], as the maximum angle of mouse motion increases slightly with consecutive jumps. Another way to increase jump speed in ''Quake III'' is a circle jump where the player gets over 500 units/sec (standard runspeed is 320 units/sec).

In some games based on the Quake 3 engine, such as ''Call of Duty'' and ''Wolfenstein: Enemy Territory'', fractional increases in jump height can be achieved by playing the game at higher [[Frame rate|frame rate]]s.

===== Circle jump =====
The circle jump start is the action performed by the player at the start of strafe jumping, giving a sudden burst of speed, as opposed to gaining speed with regular strafe jumping. This technique is found to have worked best in [[Software:Quake engine|Quake engine]] based games.

The movements are as follows:
#The player stands about 90 degrees from the direction he intends to move in.
#The player then holds forward, the left or right strafe key (depending on which direction he intends to take), and turn to face 45 degrees the opposite way. (The player will have turned 135 degrees from his original position)
#The player now continues into strafe jumping.

===== Bunny hopping =====
Bunny hopping is a term used for different kinds of movement in games. There are two major usages of the term:
In any first person shooter with jumping a player who jumps up and down to avoid being shot is sometimes called a bunny hopper. This is a very basic technique that only works against inexperienced opponents.

More advanced techniques known as bunny hopping use game physics to move faster than the base movement speed, combined with air-control (the ability to change movement direction significantly without losing speed while in the air). Techniques that gain speed without the ability to significantly change direction are often called Strafe-jumping. The physics that allow bunny hopping usually have the same calculations as those used in games that utilise ''Strafe Jumping'' with a difference that those games generally have an air speed limit of 30 units per second (which equates to approximately 15/16th of a metre or 30 inches in games utilising the ''[[Software:Source (game engine)#Source 2006|Source]]'' game engine) and a high acceleration multiplication factor against the predefined maximum airspeed, ranging from 10 to very high numbers, which allow the player to ''surf'' on highly slanted slopes.

Bunny hopping exists in ''QuakeWorld'', ''[[Software:DeFRaG|DeFRaG]]'', ''[[Software:Challenge ProMode Arena|Challenge ProMode Arena]]'', ''OSP'' (only with cpm physics) mods for ''[[Software:Quake III Arena|Quake III Arena]]'', ''[[Software:Half-Life (video game)|Half-Life]]'' (version 1.1.0.8, released in 2001, introduced a speed cap limiting the usefulness of bunny hopping<ref>{{cite web|url=https://github.com/ValveSoftware/steam-for-linux/issues/1809 |title=[HL&#93;Bring back Bunnyhopping to Half-Life! · Issue #2013 · ValveSoftware/halflife · GitHub |publisher=Github.com |date= |accessdate=2019-04-09}}</ref><ref>{{Cite web|url=https://wiki.sourceruns.org/wiki/Bunnyhopping|title=Bunnyhopping - SourceRuns Wiki|website=wiki.sourceruns.org|access-date=2019-04-09}}{{better source|date=April 2019|reason=WP:WIKIS}}</ref><ref>{{cite web|url=http://hl.loess.ru/?txt=changelog1110 |title=Changelog before 1110 - Half-Life.Loess.ru |publisher=Hl.loess.ru |date= |accessdate=2019-04-09}}</ref>) and many of its mods and sibling games including ''[[Software:Team Fortress Classic|Team Fortress Classic]]'', ''[[Software:Fortress Forever|Fortress Forever]]'', ''[[Software:Team Fortress 2|Team Fortress 2]],'' ''[[Software:Counter-Strike|Counter-Strike]]'', ''[[Software:Counter-Strike: Source|Counter-Strike]]'', ''[[Software:Natural Selection (video game)|Natural Selection]]'', ''Warsow'', ''Enemy Territory Fortress'' (a mod for ''[[Software:Wolfenstein: Enemy Territory|Wolfenstein]]''), ''[[Software:Painkiller (video game)|Painkiller]]'', ''[[Software:Kingpin: Life of Crime|Kingpin]]'', ''[[Software:Dystopia (video game)|Dystopia]]'', ''Counter Strike: Global Offensive'', ''[[Software:Xonotic|Xonotic]]'', ''[[Software:Fortnite|Fortnite]]'', and ''[[Software:Apex Legends|Apex Legends]].''

Bunnyhopping in some games does not refer to the ability to gain horizontal speed while in a jump, such as ''[[Software:The Elder Scrolls Online|Elder Scrolls Online]]'', but rather gain speed through the means of jumping after landing on a sloped surface.

==References==
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