TimeSystem.cs

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using UnityEngine;
using HKI.Core.Variables;

namespace HKI.Core.GameSystems
{
    [System.Serializable]
    public class TimeSystem
    {
        // Public variables
        [SerializeField] Integer GameSpeed = null;

        [SerializeField] float[] GameSpeedFactors = new float[] { 0.0f, 1.0f, 4.0f, 10.0f };

        [SerializeField] Float DeltaTime = null;
        [SerializeField] Float FixedDeltaTime = null;
        [SerializeField] Float UnscaledDeltaTime = null;
        [SerializeField] Float UnscaledFixedDeltaTime = null;

        // Interface functions
        public void Setup()
        {
            GameSpeed.OnValueChanged += UpdateTimeScale;
            UpdateTimeScale();
        }

        public void Update()
        {
            if(DeltaTime != null)
                DeltaTime.SetValue = Time.deltaTime;

            if(UnscaledDeltaTime != null)
                UnscaledDeltaTime.SetValue = Time.unscaledDeltaTime;
        }

        public void FixedUpdate()
        {
            if (FixedDeltaTime != null)
                FixedDeltaTime.SetValue = Time.fixedTime;

            if (UnscaledFixedDeltaTime != null)
                UnscaledFixedDeltaTime.SetValue = Time.fixedUnscaledDeltaTime;
        }

        public void Shutdown()
        {
            GameSpeed.OnValueChanged -= UpdateTimeScale;
            Time.timeScale = 1.0f;
        }

        // Helper function
        void UpdateTimeScale()
        {
            Time.timeScale = GameSpeedFactors[GameSpeed.Value];
        }
    }
}