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19116aa1a5
#rb Ben.Marsh (discussed) #fyi Ben.Marsh, Matt.Kuhlenschmidt #lockdown Nick.Penwarden [CL 3622648 by Arciel Rekman in Main branch]
48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
// Copyright 1998-2017 Epic Games, Inc. All Rights Reserved.
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#include "MainLoopTiming.h"
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#include "HAL/PlatformProcess.h"
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#include "Math/UnrealMathUtility.h"
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#include "Containers/Ticker.h"
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#include "CrashReportClientApp.h"
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#include "Async/TaskGraphInterfaces.h"
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#if !CRASH_REPORT_UNATTENDED_ONLY
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#include "Framework/Application/SlateApplication.h"
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#endif
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FMainLoopTiming::FMainLoopTiming(float InIdealTickRate, EMainLoopOptions::Type Options)
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: IdealFrameTime(1.f / InIdealTickRate)
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, bTickSlate(Options & EMainLoopOptions::UsingSlate)
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{
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}
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void FMainLoopTiming::Tick()
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{
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static double ActualDeltaTime = IdealFrameTime;
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static double LastTime = FPlatformTime::Seconds();
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// Tick app logic
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FTaskGraphInterface::Get().ProcessThreadUntilIdle(ENamedThreads::GameThread);
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FTicker::GetCoreTicker().Tick(ActualDeltaTime);
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#if !CRASH_REPORT_UNATTENDED_ONLY
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// Tick SlateApplication
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if (bTickSlate)
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{
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FSlateApplication::Get().PumpMessages();
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FSlateApplication::Get().Tick();
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}
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#endif // !CRASH_REPORT_UNATTENDED_ONLY
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// Sleep Throttling
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// Copied from Community Portal - should be shared
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FPlatformProcess::Sleep(FMath::Max<float>(0, IdealFrameTime - (FPlatformTime::Seconds() - LastTime)));
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// Calculate deltas
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const double AppTime = FPlatformTime::Seconds();
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ActualDeltaTime = AppTime - LastTime;
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LastTime = AppTime;
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}
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