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> Unreal Engine API Reference > Runtime > MovieScene > EntitySystem > UMovieSceneEntitySystem > UMovieSceneEntitySystem::DefineImplicitPrerequisite

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UMovieSceneEntitySystem::DefineImplicitPrerequisite

Creates a relationship between the two system types that ensures any systems of type UpstreamSystemType always execute before DownstreamSystemType if they are both present

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References

Module	MovieScene
Header	/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneEntitySystem.h
Include	#include "EntitySystem/MovieSceneEntitySystem.h"
Source	/Engine/Source/Runtime/MovieScene/Private/EntitySystem/MovieSceneEntitySystem.cpp

Syntax

static void DefineImplicitPrerequisite
(
TSubclassOf< UMovieSceneEntitySystem > UpstreamSystemType,
TSubclassOf< UMovieSceneEntitySystem > DownstreamSystemType
)

Remarks

Creates a relationship between the two system types that ensures any systems of type UpstreamSystemType always execute before DownstreamSystemType if they are both present

Parameters

Parameter	Description
UpstreamSystemType	The UClass of the system that should always be a prerequisite of DownstreamSystemType (ie, runs first)
DownstreamSystemType	The UClass of the system that should always run after UpstreamSystemType

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