AActor::MakeNoiseImpl
#include "GameFramework/Actor.h"
Access: public
Specifiers: static
Description
Default static implementation called by the MakeNoise delegate. Routes a noise event to the AI perception system. Override the delegate via SetMakeNoiseDelegate to replace this with a custom implementation.
Caveats & Gotchas
- • Do not call this function directly — call the instance method MakeNoise() instead, which routes through the MakeNoiseDelegate. This static function is the default target of that delegate and can be replaced without subclassing.
- • This only works with AIPerception's Hearing sense (UAISense_Hearing). The legacy PawnSensingComponent has its own noise path and does not respect MaxRange set here.
Signature
static ENGINE_API void MakeNoiseImpl(AActor* NoiseMaker, float Loudness, APawn* NoiseInstigator, const FVector& NoiseLocation, float MaxRange, FName Tag)Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| NoiseMaker | AActor* | The actor producing the noise. | — |
| Loudness | float | Relative loudness of the noise, used to scale detection range. | — |
| NoiseInstigator | APawn* | The pawn responsible for making the noise, used by AI perception. | — |
| NoiseLocation | const FVector& | World-space position of the noise. Zero vector uses the actor's location. | — |
| MaxRange | float | Maximum range at which the noise can be heard. 0 means unlimited range (capped by perception settings). | — |
| Tag | FName | Identifier for the noise type, used by AI filters. | — |
Return Type
void Example
Replace noise delegate with a custom implementation C++
// In game module startup
AActor::SetMakeNoiseDelegate(FMakeNoiseDelegate::CreateStatic(&UMyAISubsystem::HandleNoise));
// Then actors calling MakeNoise() will route to your function insteadTags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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