ai_sound
Class hierarchy |
---|
CAISound |
soundent.cpp
|
ai_sound
is a point entity available in all Source games. This entity makes abstract sounds or smells that can be sensed by NPCs, but not by the player. This can be used to cause reactions in nearby NPCs. An entity called soundent
appears to help with managing AI sounds when the game runs.
Keyvalues
- Name
(targetname)
<string> - The name that other entities refer to this entity by, via Inputs/Outputs or other keyvalues (e.g.
parentname
ortarget
).
Also displayed in Hammer's 2D views and Entity Report.See also: Generic Keyvalues, Inputs and Outputs available to all entities
- Volume
(volume)
<integer> - How far away this sound can be heard. This is a radius.
- Duration
(duration)
<float> - How long the sound persists each time it plays.
- Sound Type
(soundtype)
<choices> - The type of sound or smell will determine the reaction of NPCs that sense it. Some of these are not in the FGD, so their associated number must be typed manually.
Literal Value Description 1 Combat: Will cause most NPCs to become alert 2 World: Will cause most NPCs to become alert 4 Player: Feign player audible 8 Danger: Will cause most NPCs to move away from the position of the sound 16 Bullet Impact 32 Carcass 64 Meat 128 Garbage 256 Thumper: causes antlions to run away briefly 512 !FGD Bugbait: get nearby antlions' attention 1024 !FGD Physics Danger: Scares off npc_metropolice
,npc_combine_s
, andnpc_antlion
2048 !FGD Sniper Danger: Scares npc_sniper
s into their hole4096 Move Away: Pushes away npc_metropolice
,npc_citizen
,npc_combine_s
,npc_alyx
,npc_barney
,npc_fisherman
8192 !FGD Player Vehicle: Makes NPCs hear the player & makes npc_metropolice
turn towards the sound (only used byprop_vehicle_airboat
16384 Player Companion Readiness: Low 32768 Player Companion Readiness: Medium 65536 Player Companion Readiness: High
- Additional sound context (optional)
(soundcontext)
<choices> - Optional settings specifying such things as who can or cannot hear the sound. Many of these are not in the FGD and some of them have not been fully tested.
Literal Value Description 1048576 !FGD Sound is from Sniper 2097152 !FGD Gunfire (use with combat sound type) 4194304 !FGD Mortar (pending explosion) 8388608 Only Combine hear/smell 16777216 !FGD React to source (faces the ai_sound instead of location proxy) 33554432 !FGD Explosion (use with combat sound type) 67108864 Exclude Combine (Combine don't hear/smell) 134217728 !FGD Danger approach (react with danger if you see the ai_sound, just face if otherwise, shouldn't work with location proxy) 268435456 !FGD Only allies (npc_citizen, etc.) hear/smell
- Location Proxy
(locationproxy)
<targetname> - If you specify an entity here, the sound will be made at that entity's location (
!player
is an option).
Inputs
InsertSound
<integer>- Deprecated.
Insert a sound in the AI sound list at a specified volume (1-100) which influences detection radius.
EmitAISound
- Make the Sound.