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TimeKeeper.cs
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TimeKeeper.cs
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using System;
using Microsoft.Xna.Framework;
namespace Monofoxe.Engine.Utils
{
/// <summary>
/// Calculates elapsed time based on multiplier.
/// Should be used for fps adjusting and slowing down\speeding up time.
/// </summary>
public class TimeKeeper
{
/// <summary>
/// Global TimeKeeper instance.
/// </summary>
public static readonly TimeKeeper Global = new TimeKeeper();
internal static double _elapsedTime;
/// <summary>
/// If more than one, time will speed up.
/// If less than one, time will slow down.
/// </summary>
public double TimeMultiplier
{
get => _timeMultiplier;
set
{
if (value > 0)
{
_timeMultiplier = value;
}
}
}
private double _timeMultiplier = 1;
/// <summary>
/// Returns elapsed time, multiplied by global time multiplier.
/// </summary>
public double Time() =>
_elapsedTime * _timeMultiplier;
/// <summary>
/// Returns elapsed time, multiplied by global time multiplier.
///
/// Use this for constant speeds.
/// </summary>
public double Time(double val) =>
val * _elapsedTime * _timeMultiplier;
/// <summary>
/// Returns elapsed time, multiplied by global time multiplier
/// and time-corrected for acceleration.
///
/// Use this for accelerating values.
/// </summary>
public double Time(double speed, double acceleration) =>
(speed + Time(Math.Abs(acceleration) * 0.5)) * _elapsedTime * _timeMultiplier;
/// <summary>
/// Returns elapsed time, multiplied by global time multiplier.
/// </summary>
public float Time(float val) =>
(float)Time((double)val);
/// <summary>
/// Returns elapsed time, multiplied by global time multiplier
/// and time-corrected for acceleration.
///
/// Use this for accelerating values.
/// </summary>
public float Time(float speed, float acceleration) =>
(float)Time((double)speed, acceleration);
/// <summary>
/// Returns elapsed time, multiplied by global time multiplier.
///
/// Use this for constant speeds.
/// </summary>
public Vector2 Time(Vector2 val) =>
new Vector2(Time(val.X), Time(val.Y));
/// <summary>
/// Returns elapsed time, multiplied by global time multiplier
/// and time-corrected for acceleration.
///
/// Use this for accelerating values.
/// </summary>
public Vector2 Time(Vector2 speed, Vector2 acceleration) =>
new Vector2(Time(speed.X, acceleration.X), Time(speed.Y, acceleration.Y));
}
}