Prop car alarm: Difference between revisions
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Note:The Enable/Disable inputs will disable or enable the ability to trigger alarms. However, the prop_car_glass entity that goes along with this car will not be affected by this and needs to be disabled separately, by swapping it with a generic prop_dynamic using the default glass version for this car, which does not blink.
Tip:By default the alarm sounds for about 30 seconds, then fires the
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{{CD|CCarProp}} | {{CD|CCarProp}} | ||
{{this is a| | {{this is a|model entity|name=prop_car_alarm|series=Left 4 Dead}} This class is the same as [[prop_physics]], but with special outputs used specifically for a car alarm, to be used with [[prop_car_glass]] for its glass. | ||
This entity can sense people firing their weapons next to it and has outputs for that event. It will call a panic event the moment its assigned model is touched or damaged by Survivors, but then it will stop functioning like a car alarm and will effectively just be a [[prop_physics]]. | This entity can sense people firing their weapons next to it and has outputs for that event. It will call a panic event the moment its assigned model is touched or damaged by Survivors, but then it will stop functioning like a car alarm and will effectively just be a [[prop_physics]]. | ||
In {{L4d2|4}} there is a [[Prefab]] of this car, to be used as [[func_instance]] in | In {{L4d2|4}} there is a [[Prefab]] of this car, to be used as [[func_instance]], in {{file|sdk_content/mapsrc/instance/prop_car_alarm|vmf}} | ||
{{note|The Enable/Disable inputs will disable or enable the ability to trigger alarms. However, the [[prop_car_glass]] entity that goes along with this car will not be affected by this and needs to be disabled separately, by swapping it with a generic [[prop_dynamic]] using the default glass version for this car, which does not blink.}} | {{note|The Enable/Disable inputs will disable or enable the ability to trigger alarms. However, the [[prop_car_glass]] entity that goes along with this car will not be affected by this and needs to be disabled separately, by swapping it with a generic [[prop_dynamic]] using the default glass version for this car, which does not blink.}} | ||
{{tip|By default the alarm sounds for about 30 seconds, then fires the <code>OnCarAlarmEnd</code> Output. You can make this time longer by instead using an <code>OnCarAlarmStart</code> output which fires a relay after X amount of seconds, which will then fire whatever outputs <code>OnCarAlarmEnd</code> was firing.}} | {{tip|By default the alarm sounds for about 30 seconds, then fires the <code>OnCarAlarmEnd</code> Output. You can make this time longer by instead using an <code>OnCarAlarmStart</code> output which fires a relay after X amount of seconds, which will then fire whatever outputs <code>OnCarAlarmEnd</code> was firing.}} | ||
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==Keyvalues== | ==Keyvalues== | ||
{{KV Targetname}} | {{KV Targetname}} | ||
{{KV | {{KV StartDisabled}} | ||
{{KV Model}} | |||
== Inputs == | == Inputs == | ||
Latest revision as of 07:53, 4 June 2025
 Class hierarchy
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| CCarProp |
prop_car_alarm is a model entity available in 
Left 4 Dead series. This class is the same as prop_physics, but with special outputs used specifically for a car alarm, to be used with prop_car_glass for its glass.
This entity can sense people firing their weapons next to it and has outputs for that event. It will call a panic event the moment its assigned model is touched or damaged by Survivors, but then it will stop functioning like a car alarm and will effectively just be a prop_physics.
In Left 4 Dead 2 there is a Prefab of this car, to be used as func_instance, in 
sdk_content/mapsrc/instance/prop_car_alarm.vmf
Note:The Enable/Disable inputs will disable or enable the ability to trigger alarms. However, the prop_car_glass entity that goes along with this car will not be affected by this and needs to be disabled separately, by swapping it with a generic prop_dynamic using the default glass version for this car, which does not blink.Tip:By default the alarm sounds for about 30 seconds, then fires the OnCarAlarmEnd Output. You can make this time longer by instead using an OnCarAlarmStart output which fires a relay after X amount of seconds, which will then fire whatever outputs OnCarAlarmEnd was firing.Keyvalues
- Name (targetname) <string>[ Edit ]
- The name that other entities refer to this entity by, via Inputs/Outputs or other keyvalues (e.g.
parentnameortarget).
Also displayed in Hammer's 2D views and Entity Report.See also: Generic Keyvalues, Inputs and Outputs available to all entities
- Start Disabled (StartDisabled) <boolean>
- Stay dormant until activated (with the
Enableinput).
- World Model (model) <model path>[ Edit ]
- In-game 3D representation of the entity to display. This is the path to a MDL relative to the game's root directory. (128 character limit)
Inputs
EnableDisable:
- Enable / Disable
- Enable/disable this entity from performing its task. It might also disappear from view.
- SurvivorStandingOnCar
- Activates alarm. Automatically sent when Survivor stands on or damages the car
Outputs
- OnCarAlarmStart
- !activator = !caller = this entity
Car alarm should go off
- OnCarAlarmEnd
- !activator = !caller = this entity
Car alarm has shut off
- OnCarAlarmChirpStart
- !activator = !caller = this entity
Warning chirp starts
- OnCarAlarmChirpEnd
- !activator = !caller = this entity
Warning chirp stopped
ConVars
| Cvar/Command | Parameters or default value | Descriptor | Effect |
|---|---|---|---|
| car_alarm_chirp_distance | 350 | ||
| car_alarm_chirp_duration | 1 | ||
| car_alarm_chirp_interval | 3 | ||
| car_alarm_distance | 750 | ||
| car_alarm_duration | 15 |