Trigger catapult

trigger_catapult is a brush entity available in Portal 2, Team Fortress 2, and Garry's Mod.

It is used to launch the player or other objects into the air.

Note:An entity named trigger_catapult is also available in Alien Swarm: Reactive Drop, but it seems to be a different entity with different functionality.

KeyValues

Player Speed ([todo internal name (i)]) <float>

Speed at which to launch the players (u/sec)

Physics Object Speed ([todo internal name (i)]) <float>

Speed at which to launch physics objects (u/sec)

Use Threshold Check ([todo internal name (i)]) <boolean>

If set to yes the player/object will only be catapulted if his/its speed is within the limits specified in the keyvalues for lower and upper threshold.

Entry Angle Tolerance ([todo internal name (i)]) <float>

Flung object's velocity must be pointing this much at the target. Specify a value between [-1...1] 1 means exactly, 0 means within 180 degrees -1 means any angle is accepted. This is only used if Use Threshold Check is set to yes.

Use Exact Velocity ([todo internal name (i)]) <boolean>

Try to fling exactly at the speed specified - this prevents the added upward velocity from a launch target.

Exact Solution Method ([todo internal name (i)]) <choices>

Using exact velocity generates two correct solutions. Use this to force which one you choose.

• 0 : Best
• 1 : Solution One
• 2 : Solution Two

Lower Threshold ([todo internal name (i)]) <float>

Flung object must be within this percentage value in order to activate fling. The percentage specified is subtracted from the speed set in the keyvalue Player Speed. Specify a value between [0...1] (default is .15) This is only used if Use Threshold Check is set to yes.

Upper Threshold ([todo internal name (i)]) <float>

Flung object must be within this percentage value in order to activate fling. The percentage specified is added to the speed set in the keyvalue Player Speed. Specify a value between [0...1] (default is .30) This is only used if Use Threshold Check is set to yes.

Note:Thresholds seem only concerned by horizontal speed (X-axis), vertical speed seems ignored so it is not the current velocity that is taken into account but only the part on the X-axis

Launch direction ([todo internal name (i)]) <angle>

Direction to launch the player in.

Launch target ([todo internal name (i)]) <targetname>

Entity to try to 'hit' when we're launched.

Only check velocity ([todo internal name (i)]) <boolean>

Only check velocity of the touching object - don't actually catapult it. Use in conjunction with OnCatapulted to create velocity checking triggers. Only works when Use Threshhold Check is enabled.

Apply angular impulse ([todo internal name (i)]) <boolean>

If a random angular impulse should be applied to physics objects being catapulted.

Air Control SupressionTime ([todo internal name (i)]) <float>

[Launch by target only!] If greater than zero, supress player aircontrol for this number (in seconds). If less than zero use the default (quarter second).

Note:

• The supression remains active even if the player has already landed.
• The supression concerns player controls. Funnelling is still possible, i.e. placing a portal close to the target and looking at it may still massively manipulate the player's flight.

Use Absolute Threshold Check ([todo internal name (i)]) <boolean> (only in )

If true, the threshold values represent actual velocities instead of a percentage

BaseTrigger

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

Flags

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.

Inputs

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

OnCatapulted

The object has been launched.

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.