logic_relay

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logic_relay is a point entity available in all Source games. It is a message forwarder. It can be used to fire many outputs at once from just one input, or, by being disabled, to break an I/O chain.

Keyvalues

EnableDisable:

Start Disabled <bool>
Stay dormant until activated (probably with the Enable input).

Targetname:

Name <string>
The targetname other entities refer to this entity by.

Flags

  • Only trigger once
  • Allow fast retrigger (There is otherwise a 0.1 second delay between triggering)

Inputs

Trigger
Fire OnTrigger, if the relay is enabled.
Toggle
Toggle between enabled and disabled.
CancelPending
Cancels any events fired by this relay that are currently pending in the I/O event queue.

EnableDisable:

Enable
Disable
Enable/disable this entity from performing its task. It might also disappear from view.

Targetname:

Kill
Removes this entity from the world.
KillHierarchy
Removes this entity and all its children from the world.
AddOutput <string>
Evaluates a keyvalue/output on this entity. It can be potentially very dangerous, use with care.
Format: <key> <value>
Format: <output name> <targetname>:<inputname>:<parameter>:<delay>:<max times to fire, -1 means infinite>
FireUser1 to FireUser4
Fire the OnUser outputs; see User Inputs and Outputs.

Outputs

OnTrigger
Fired when the relay receives the Trigger input.
OnSpawn
Fired when the relay is spawned. If the relay is set to only trigger once, it will delete itself after firing this output.

Targetname:

OnUser1 to OnUser4
Fired in response to the FireUser inputs; see User Inputs and Outputs.
OnKilled (New with Left 4 Dead)
Fired when the entity is killed and removed from the game.
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