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* Option to disabling blocking. This is useful when nDisplay is already controlling frame rate. If frame rate is not enforced in some other way, game time will seem to pass at the wrong rate. * Force single frame delta time. Normally this custom timestemp quantizes the delta time to a whole number that keeps up with real time. With this option, delta time will always be equal to one frame time, regardless to hom much real time has passed. Defaults leave old behavior unchanged. #jira #rb #preflight 6305d8bc516bef57ffe28566 [CL 21536704 by Alejandro Arango in ue5-main branch]
69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "Engine/EngineCustomTimeStep.h"
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#include "GenlockedCustomTimeStep.h"
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#include "HAL/Platform.h"
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#include "Misc/FrameRate.h"
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#include "UObject/ObjectMacros.h"
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#include "UObject/UObjectGlobals.h"
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#include "GenlockedFixedRateCustomTimeStep.generated.h"
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class UEngine;
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class UObject;
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/**
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* Control the Engine TimeStep via a fixed frame rate.
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*
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* Philosophy:
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*
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* * Quantized increments but keeping up with platform time.
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*
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* * FApp::GetDeltaTime
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* - Forced to a multiple of the desired FrameTime.
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*
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* * FApp::GetCurrentTime
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* - Incremented in multiples of the desired FrameTime.
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* - Corresponds to platform time minus any fractional FrameTime.
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*
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*/
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UCLASS(Blueprintable, editinlinenew, meta = (DisplayName = "Genlocked Fixed Rate"))
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class TIMEMANAGEMENT_API UGenlockedFixedRateCustomTimeStep : public UGenlockedCustomTimeStep
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{
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GENERATED_UCLASS_BODY()
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public:
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//~ UFixedFrameRateCustomTimeStep interface
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virtual bool Initialize(UEngine* InEngine) override;
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virtual void Shutdown(UEngine* InEngine) override;
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virtual bool UpdateTimeStep(UEngine* InEngine) override;
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virtual ECustomTimeStepSynchronizationState GetSynchronizationState() const override;
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virtual FFrameRate GetFixedFrameRate() const override;
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//~ UGenlockedCustomTimeStep interface
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virtual uint32 GetLastSyncCountDelta() const override;
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virtual bool IsLastSyncDataValid() const override;
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virtual bool WaitForSync() override;
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public:
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/** Desired frame rate */
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UPROPERTY(EditAnywhere, Category = "Timing")
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FFrameRate FrameRate;
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/** Indicates that this custom time step should block to enforce the specified frame rate. Set to false if this is enforced elsewhere. */
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UPROPERTY(EditAnywhere, Category = "Timing")
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bool bShouldBlock;
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/** When true, delta time will always be 1/FrameRate, regardless of how much real time has elapsed */
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UPROPERTY(EditAnywhere, Category = "Timing")
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bool bForceSingleFrameDeltaTime;
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private:
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uint32 LastSyncCountDelta;
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double QuantizedCurrentTime;
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double LastIdleTime;
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};
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