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trigger_push

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class hierarchy
CTriggerPush defined in triggers.cpp
CBaseTrigger
CBaseToggle
CBaseEntity

trigger_push is a brush entity available in all Source Source games. It is a trigger volume that pushes entities that touch it, except those with a parent.

Icon-Bug.pngBug:Left 4 Dead 2 Does not affect Common infected and witches
Icon-Bug.pngBug:Counter-Strike: Global Offensive Does not affect drones [confirm]

Keyvalues

Targetname:

Name (targetname) <string>
The targetname that other entities refer to this entity by.
Push Direction (pushdir) <angle>
Angles indicating the direction to push touched entities.
Note.pngNote:In Counter-Strike: Global Offensive changing this keyvalue via "Point At..." creates a new "angles" property. Copy its value to "Push Direction".
Speed of Push (speed) <integer>
The speed at which to push entities away, in inches / second.
Scale force for alternate ticks (alternateticksfix) <float>
If nonzero, scale the force by this amount when running with alternate ticks. This fixes problems with an overly large force due to the longer frametime on when running with sv_alternateticks 1.
Trigger on Start Touch (triggeronstarttouch) <boolean> (only in Left 4 Dead 2)
Trigger on start touch instead of on touch.
Only Falling Players (OnlyFallingPlayers) <boolean> (in all games since Counter-Strike: Global Offensive) (also in Garry's Mod)
Only affect players if they are falling (and not pressing jump).
Player fall speed (FallingSpeedThreshold) <float> (in all games since Counter-Strike: Global Offensive) (also in Garry's Mod)
A player must be falling this fast for them to be pushed.

BaseTrigger:

Filter Name (filtername) <filter>
A filter entity to test potential activators against.
Start Disabled (StartDisabled) <boolean>
Stay dormant until activated (with theEnableinput).


Flags

TriggerPush:

  •  [128] : Once Only (possibly means set velocity rather than apply acceleration)
  •  [256] : Affects Ladders (Half-Life 2)

BaseTrigger:
  •  [1] : Clients (Survivors, Special Infected, Tanks Left 4 Dead series)
  •  [2] : NPCs (Common Infected, Witches Left 4 Dead series)
  •  [8] : Physics Objects
  •  [16] : Only player ally NPCs
  •  [32] : Only clients in vehicles
  •  [64] : Everything (not including physics debris)
  •  [512] : Only clients *not* in vehicles
  •  [1024] : Physics debris
  •  [2048] : Only NPCs in vehicles (respects player ally flag)
  •  [4096] : Disallow Bots (removed since Left 4 Dead)
  •  [4096] : Correctly account for object mass (trigger_push used to assume 100Kg) and multiple component physics objects (car, blob...) (in all games since Alien Swarm)

Inputs

SetPushSpeed <integer> (only in Left 4 Dead 2)
Set the push speed in inches / second.
SetPushDirection <vector> (in all games since Alien Swarm) (also in Garry's Mod)
Sets the push angle of the trigger.
SetSpeed <integer> (only in Portal 2: Community Edition)
Sets the push speed. Still takes alternate tick keyvalue into account.

BaseTrigger:
Toggle
Toggles this trigger between enabled and disabled states.
Enable
Enable trigger
Disable
Disable trigger
TouchTest  (in all games since Source 2007)
Triggers either the OnTouching or OnNotTouching outputs for whether anything is touching this entity.
StartTouch  (in all games since Source 2007) !FGD
Behave as if the !caller entity had just entered the trigger volume. Accepts non-physical entities.
EndTouch  (in all games since Source 2007) !FGD
Behave as if !caller had just exited the trigger volume.
DisableAndEndTouch  (only in Source 2013 Multiplayer(Team Fortress 2))
Disables this trigger and calls EndTouch on all currently-touching entities.


Outputs

BaseTrigger:

OnStartTouch
Fired when a valid entity starts touching this trigger. !activator is whatever touches the trigger.
OnStartTouchAll
Fired when a valid entity starts touching this trigger, and no other entities are touching it. If there are any other entities touching the trigger when a new one begins to touch, only OnStartTouch will fire.
OnEndTouch
Fired when a valid entity stops touching this trigger.
Warning.pngWarning:This includes entities which are deleted while inside the trigger. In this case !activator will be invalid.
OnEndTouchAll
Fired when all valid entities stop touching this trigger.
OnTouching  (in all games since Source 2007)
Fired if something is currently touching this trigger when TouchTest is fired.
OnNotTouching  (in all games since Source 2007)
Fired if nothing is currently touching this trigger when TouchTest is fired.