TimeStep.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Chaos/Defines.h"
 
namespace Chaos
{
    class ITimeStep
    {
    public:
        virtual ~ITimeStep() {}
 
        virtual void Reset() {}
 
        virtual void Update() = 0;
 
        virtual float GetCalculatedDt() const = 0;
 
        virtual float GetActualDt() const { return GetCalculatedDt(); }
 
        virtual void SetTarget(float InTarget) { (void)InTarget; }
 
        virtual float GetTarget() const { return GetCalculatedDt(); }
    };
 
    class UE_DEPRECATED(4.27, "Deprecated, this class is to be deleted") FFixedTimeStep final : public ITimeStep
    {
    public:
 
        virtual void Reset() override;
        virtual void Update() override;
        virtual float GetCalculatedDt() const override;
        virtual float GetActualDt() const override;
        virtual void SetTarget(float InTarget) override;
        virtual float GetTarget() const override;
    private:
        double LastTime;
        double CurrentTime;
 
        float TargetDt;
        float ActualDt;
    };
 
    class UE_DEPRECATED(4.27, "Deprecated, this class is to be deleted") FVariableTimeStep final : public ITimeStep
    {
 
        virtual void Reset() override;
        virtual void Update() override;
        virtual float GetCalculatedDt() const override;
    private:
        double LastTime;
 
        float Dt;
    };
 
    class UE_DEPRECATED(4.27, "Deprecated, this class is to be deleted") FVariableWithCapTimestep final : public ITimeStep
    {
        virtual void Reset() override;
        virtual void Update() override;
        virtual float GetCalculatedDt() const override;
        virtual float GetActualDt() const override;
    private:
        double LastTime;
        double CurrentTime;
 
        float Dt;
        float ActualDt;
    };
 
    class UE_DEPRECATED(4.27, "Deprecated, this class is to be deleted") FVariableMinimumWithCapTimestep final : public ITimeStep
    {
        virtual void Reset() override;
        virtual void Update() override;
        virtual float GetCalculatedDt() const override;
        virtual float GetActualDt() const override;
        virtual void SetTarget(float InTarget) override;
    private:
        double LastTime;
        double CurrentTime;
 
        float Dt;
        float TargetDt;
        float ActualDt;
    };
}