¶ Properties of GBBarrelComponent
The most useful/pertinent properties of the barrel blueprint component are listed below:
Figure 1. Various properties of GBBarrelComponent
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Velocity ModifierThis modifies the base velocity of all/any rounds shot by this weapon. Usually leave at 1.0. -
Muzzle Device ThreadThe name of the socket on the weapon skeletal mesh to which the suppressor should be attached. See <SuppressorSocketName> in setting up weapon skeletal mesh. -
Flash OffsetDistance away from the barrel end to spawn the flash VFX, in UE units (cm). -
Attached FlashWhether to spawn the flash attached to the weapon or have it stay where it was spawned. -
Looped FlashIf true, the flash VFX will be manually deactivated when appropriate (for example when a full auto burst stops).
Figure 2. AI section of GBBarrelComponent
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Audio Signal RadiusThis is the base distance in UE4 units (cm) representing how far away your shots will be heard by AI. In this case, AI within 70m will be alerted by your gunfire. However, particular maps may apply a modifier (larger maps tend to have extended hearing ranges, and vice versa for smaller levels). Muzzle devices (suppressors) specify an audio signal radius that will override the base barrel value if attached. -
Suppressor Switch ValueEssentially eitherUnsuppressedorSuppressed, depending on whether the barrel has an integral suppressor (like the MP5SD6 and so on). This affects the specific sounds that will be chosen to play when you shoot. (It may, now or in future, affect the AI perception also.)
The following properties relate to the AI light detection feature. It is used to allow AI to be alerted to light-related events such as muzzle flashes, flashlights, and so on:
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Light Level KeyThis is essentially a tag indicating the type of light event (for debugging) -
Light Level AlphaThis is a measure of how bright the event is, from 0.0 (nothing) to 1.0 (full brightness) -
Light Level TimeThis is how long the event lasts (approximately), in seconds.