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> Unreal Engine API Reference > Runtime > MovieScene > EntitySystem > FInterrogationChannel

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FInterrogationChannel

A numeric identifier used to represent a specific 'channel' within an interrogation linker.

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References

Module	MovieScene
Header	/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneEntitySystemTypes.h
Include	#include "EntitySystem/MovieSceneEntitySystemTypes.h"

Syntax

struct FInterrogationChannel

Remarks

A numeric identifier used to represent a specific 'channel' within an interrogation linker. Interrogation channels are used to identify groupings of tracks or entities that relate to the same output (eg: a property on an object; a master track etc). See FInterrogationKey for a combination of a channel with a specific interrogation index (or time)

Constructors

	Name	Description
	FInterrogationChannel()	Default construction to an invalid channel

Functions

	Name	Description
int32	AsIndex()	Get the underlying numeric representation of this channel
FInterrogati...	Default()	A default interrogation channel that can be used when interrogation is only operating on a single set of tracks
FInterrogati...	First()	Retrieve the first allocatable channel when dealing with multiple groupings of tracks
FInterrogati...	FromIndex ( int32 InIndex )	Make a channel from an index known to already relate to a valid channel
FInterrogati...	Invalid()	An invalid channel. Should only be used for comparison.
bool	IsValid()	Check whether this channel is valid
FInterrogati...	Last()	Retrieve the last allocatable channel when dealing with multiple groupings of tracks

Operators

		Name	Description
		operator bool()	Check whether this channel is valid
	FInterrogati...	operator++()	Get the next channel after this one

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