ai_sound

From Valve Developer Community

Contents 1 Entity Description 1.1 Contexts 2 Keyvalues 3 Inputs 4 Outputs 5 See also

Entity Description

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.

Contexts

Literal Value	Description
1048576	Sound is from Sniper
2097152	Sound is from Launcher
4194304	Mortar Explosion Here
8388608	Only Combine hear/smell
33554432	Explosion (Usually added to combat sound)
67108864	Exclude Combine (Combine don't hear/smell)

Keyvalues

• Targetname:

• Parentname:

• soundtype

<choices> The type of sound or smell will determine the reaction of NPCs that sense it. The contexts above can be factored into the number and entered 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	Bugbait: get nearby antlions' attention
1024	Physics Danger: Scares off npc_metropolice, npc_combine_s, and npc_antlion
2048	Sniper Danger: Scares npc_snipers into their hole
4096	Move Away: Pushes away npc_metropolice, npc_citizen, npc_combine_s, npc_alyx, and npc_barney, npc_fisherman
8192	Player Vehicle: Makes NPCs hear the player & makes npc_metropolice turn towards the sound (only used by prop_vehicle_airboat
16384	Player Comanion Readiness: Low
32768	Player Comanion Readiness: Medium
65536	Player Comanion Readiness: High

• locationproxy

<target_destination> The name of an entity to use as a proxy to determine the location at which to make the sound.

If you specify an entity here, the sound will be made at that entity's location (!player included)

• volume

<integer> How far away this sound can be heard. This is a radius.

• duration

<float> How long the sound persists each time you insert it.

Inputs

• Targetname:

• Parentname:

• InsertSound <integer>

Insert a sound in the AI sound list at a specified volume (1-100) which influences detection radius. Obsolete

• EmitAISound

Make the sound.

Outputs

• Targetname:

See also