Trigger push

Class hierarchy
CTriggerPush ↳CBaseTrigger ↳CBaseToggle ↳CBaseEntity
triggers.cpp

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

Bug: Does not affect Common infected and witches  [todo tested in ?]

Bug: Does not affect drones ^[confirm]  [todo tested in ?]

Keyvalues

Name (targetname) <string>[ Edit ]

The name that other entities refer to this entity by, via Inputs/Outputs or other keyvalues (e.g. parentname or target).
Also displayed in Hammer's 2D views and Entity Report.

See also:  Generic Keyvalues, Inputs and Outputs available to all entities

Push Direction (pushdir) <angle>

Angles indicating the direction to push touched entities.

Note:In 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 )

Trigger on start touch instead of on touch.

Only Falling Players (OnlyFallingPlayers) <boolean> (in all games since ) (also in )

Only affect players if they are falling (and not pressing jump).

Player fall speed (FallingSpeedThreshold) <float> (in all games since ) (also in )

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:

Once Only (possibly means set velocity rather than apply acceleration) : [128]

Affects Ladders (Half-Life 2) : [256]

BaseTrigger

Everything (not including physics debris) : [64] Clients (Survivors, Special Infected, Tanks ) : [1] Only clients in vehicles : [32] Only clients *not* in vehicles : [512] Disallow Bots (removed since ) : [4096] NPCs (Common Infected, Witches ) : [2] Only player ally NPCs : [16] Only NPCs in vehicles (respects player ally flag) : [2048] Physics Objects (not including physics debris) : [8] Physics debris (include also physics debris) : [1024] Pushables (Passes entities with classname func_pushable) : [4]  Deprecated. Equivalent to using Everything + filter_activator_class that filters func_pushable.

Correctly account for object mass (trigger_push used to assume 100Kg) and multiple component physics objects (car, blob...) : [4096] (in all games since ) (also in )

Inputs

SetPushSpeed <integerRedirectInput/integer> (only in )

Set the push speed in inches / second.

SetPushDirection <vectorRedirectInput/Vector> (in all games since ) (also in )

Sets the push angle of the trigger.

SetSpeed <integerRedirectInput/integer> (only in )

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 ) Triggers either the OnTouching or OnNotTouching outputs for whether anything is touching this entity. Bug:Sleeping prop_physics will never fire "OnTouching". Also applies to entities using prop_physics as base.  (tested in: ) StartTouch  (in all games since ) !FGD Behave as if the !caller entity had just entered the trigger volume. Accepts non-physical entities. EndTouch  (in all games since ) !FGD Behave as if !caller had just exited the trigger volume. DisableAndEndTouch  (only in ) Disables this trigger and calls EndTouch on all currently-touching entities.

Outputs

BaseTrigger

OnStartTouch !activator = entity that caused this output !caller = this entity Fired when a valid entity starts touching this trigger. OnStartTouchAll !activator = entity that caused this output !caller = this entity 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 !activator = entity that caused this output !caller = this entity Fired when a valid entity stops touching this trigger. Note:Will also fire for entities touching it when trigger is disabled via Disable input Warning:This includes entities which are deleted while inside the trigger. In this case !activator will be invalid. Warning:OnEndTouch can fire before OnStartTouch under certain circumstances[How?] where both are fired on the same tick and each have the same delay. Fix:Add a slight delay to OnEndTouch. OnEndTouchAll !activator = entity that caused this output !caller = this entity Fired when all valid entities stop touching this trigger. OnTouching  (in all games since ) !activator = !caller = this entity Fired if something is currently touching this trigger when TouchTest is fired. OnNotTouching  (in all games since ) !activator = !caller = this entity Fired if nothing is currently touching this trigger when TouchTest is fired.

See Also

• script_trigger_push