/// <summary>
/// Initializes the game.
/// </summary>
private static void Initialize()
{
_clock = new HighPrecisionClock();
_timer = new FixedStepTimer(_clock);
_clock.Start();
_timer.Start();
}
public void SwitchClocks()
{
ManualClock clock1 = new ManualClock();
ManualClock clock2 = new ManualClock();
clock1.Start();
clock2.Start();
IGameTimer timer = new FixedStepTimer(clock1)
{
StepSize = TimeSpan.FromMilliseconds(10),
};
timer.TimeChanged += timer_TimeChanged;
timer.Start();
clock1.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
timer.Clock = clock2;
Assert.AreSame(clock2, timer.Clock);
clock1.Update(TimeSpan.FromMilliseconds(10));
CheckNoTimeChangedEvent();
clock2.Update(TimeSpan.FromMilliseconds(20));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(30), TimeSpan.FromMilliseconds(20));
timer.Clock = null;
Assert.IsNull(timer.Clock);
clock1.Update(TimeSpan.FromMilliseconds(10));
clock2.Update(TimeSpan.FromMilliseconds(20));
CheckNoTimeChangedEvent();
Assert.AreEqual(TimeSpan.FromMilliseconds(30), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.DeltaTime);
}
/// <summary>
/// Initializes the game.
/// </summary>
public static void Initialize()
{
_clock = new HighPrecisionClock();
_timer = new FixedStepTimer(_clock);
_timer.TimeChanged += Update;
_timer.Idle += Idle;
_clock.Start();
_timer.Start();
}
public void AccumulatedStepsAndPendingSteps()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Start();
timer.AccumulateTimeSteps = true;
int desiredPendingSteps = 0;
int desiredAccumlatedSteps = 2;
timer.TimeChanged += (s, e) =>
{
Assert.AreEqual(desiredPendingSteps, timer.PendingSteps);
Assert.AreEqual(desiredAccumlatedSteps, timer.AccumulatedSteps);
desiredPendingSteps--;
};
clock.Update(TimeSpan.FromMilliseconds(22));
timer.Reset();
timer.Start();
timer.AccumulateTimeSteps = false;
desiredPendingSteps = 3;
desiredAccumlatedSteps = 1;
clock.Update(TimeSpan.FromMilliseconds(42));
Assert.AreEqual(-1, desiredPendingSteps);
}
public void AccumulatedTime()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.Zero, timer.AccumulatedTime);
clock.Update(TimeSpan.FromMilliseconds(3));
Assert.AreEqual(TimeSpan.FromMilliseconds(3), timer.AccumulatedTime);
clock.Update(TimeSpan.FromMilliseconds(6));
Assert.AreEqual(TimeSpan.FromMilliseconds(9), timer.AccumulatedTime);
clock.Update(TimeSpan.FromMilliseconds(12));
Assert.AreEqual(TimeSpan.FromMilliseconds(1), timer.AccumulatedTime);
// MaxNumberOfSteps exceeded:
clock.Update(TimeSpan.FromMilliseconds(1000000));
Assert.AreEqual(TimeSpan.Zero, timer.AccumulatedTime);
// Accumulated steps.
timer.AccumulateTimeSteps = true;
clock.Update(TimeSpan.FromMilliseconds(22));
Assert.AreEqual(TimeSpan.FromMilliseconds(2), timer.AccumulatedTime);
timer.AccumulateTimeSteps = false;
clock.Update(TimeSpan.FromMilliseconds(22));
timer.TimeChanged += (s, e) =>
{
if (timer.PendingSteps > 0)
{
Assert.AreEqual(TimeSpan.Zero, timer.AccumulatedTime);
}
else
{
Assert.AreEqual(TimeSpan.FromMilliseconds(4), timer.AccumulatedTime);
}
};
}
public async Task TestTimer1sInterval()
{
const int interval = 1;
var sut = new FixedStepTimer(TimeSpan.FromSeconds(interval));
var tickResults = new List <DateTime>();
var firstSignalTime = DateTime.MinValue;
sut.Tick += (s, e) =>
{
var signalTime = new DateTime(
1, 1, 1,
e.SignalTime.Hour,
e.SignalTime.Minute,
e.SignalTime.Second
);
if (e.TickCount == 1)
{
firstSignalTime = signalTime;
}
tickResults.Add(signalTime);
};
try
{
sut.Start(true);
await Task.Delay(TimeSpan.FromSeconds(10));
sut.Stop();
}
finally
{
sut.Close();
}
for (var i = 0; i < tickResults.Count; i++)
{
var want = firstSignalTime.AddSeconds(interval * i);
var got = tickResults[i];
var w = want.ToString("HH:mm:ss.fff");
var g = got.ToString("HH:mm:ss.fff");
Trace.WriteLine($"want:[{w}]\tgot:[{g}]");
Assert.AreEqual(want, got);
}
Assert.AreEqual(11, sut.TickCount);
}
public void TimerReset()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Reset();
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
timer.Reset();
Assert.IsFalse(timer.IsRunning);
Assert.AreEqual(TimeSpan.Zero, timer.Time);
Assert.AreEqual(TimeSpan.Zero, timer.DeltaTime);
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(20), TimeSpan.FromMilliseconds(10));
timer.Stop();
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.Time);
Assert.AreEqual(TimeSpan.Zero, timer.DeltaTime);
timer.Reset();
Assert.AreEqual(TimeSpan.Zero, timer.Time);
Assert.AreEqual(TimeSpan.Zero, timer.DeltaTime);
}
public void Scale()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.TimeChanged += timer_TimeChanged;
timer.Start();
Assert.AreEqual(1.0, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(20), TimeSpan.FromMilliseconds(10));
timer.Speed = 0.5;
Assert.AreEqual(0.5, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoTimeChangedEvent();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(30), TimeSpan.FromMilliseconds(10));
timer.Speed = 2.0;
Assert.AreEqual(2.0, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(50), TimeSpan.FromMilliseconds(20));
timer.Speed = -3.0;
Assert.AreEqual(-3.0, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(20), TimeSpan.FromMilliseconds(-30));
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(-30), timer.DeltaTime);
}
public void AccumlateTimeSteps()
{
int handleTimeStepCallCount = 0;
ManualClock clock = new ManualClock();
clock.Start();
var timeIncrement = new TimeSpan(166666);
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = timeIncrement,
MaxNumberOfSteps = 8,
};
timer.TimeChanged += (obj, timeEventArgs) =>
{
Assert.AreEqual(timeIncrement, timeEventArgs.DeltaTime);
handleTimeStepCallCount++;
};
Assert.AreEqual(true, timer.AccumulateTimeSteps);
timer.AccumulateTimeSteps = false;
Assert.AreEqual(false, timer.AccumulateTimeSteps);
timer.Start();
handleTimeStepCallCount = 0;
clock.Update(new TimeSpan(timeIncrement.Ticks * 6));
Assert.AreEqual(6, handleTimeStepCallCount);
handleTimeStepCallCount = 0;
clock.Update(timeIncrement);
Assert.AreEqual(1, handleTimeStepCallCount);
handleTimeStepCallCount = 0;
clock.Update(new TimeSpan(timeIncrement.Ticks / 2));
Assert.AreEqual(0, handleTimeStepCallCount);
clock.Update(new TimeSpan(timeIncrement.Ticks / 2));
Assert.AreEqual(1, handleTimeStepCallCount);
}
public void AccumulatedStepsAndPendingSteps()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Start();
timer.AccumulateTimeSteps = true;
int desiredPendingSteps = 0;
int desiredAccumlatedSteps = 2;
timer.TimeChanged += (s, e) =>
{
Assert.AreEqual(desiredPendingSteps, timer.PendingSteps);
Assert.AreEqual(desiredAccumlatedSteps, timer.AccumulatedSteps);
desiredPendingSteps--;
};
clock.Update(TimeSpan.FromMilliseconds(22));
timer.Reset();
timer.Start();
timer.AccumulateTimeSteps = false;
desiredPendingSteps = 3;
desiredAccumlatedSteps = 1;
clock.Update(TimeSpan.FromMilliseconds(42));
Assert.AreEqual(-1, desiredPendingSteps);
}
public void AccumlateTimeSteps()
{
int handleTimeStepCallCount = 0;
ManualClock clock = new ManualClock();
clock.Start();
var timeIncrement = new TimeSpan(166666);
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = timeIncrement,
MaxNumberOfSteps = 8,
};
timer.TimeChanged += (obj, timeEventArgs) =>
{
Assert.AreEqual(timeIncrement, timeEventArgs.DeltaTime);
handleTimeStepCallCount++;
};
Assert.AreEqual(true, timer.AccumulateTimeSteps);
timer.AccumulateTimeSteps = false;
Assert.AreEqual(false, timer.AccumulateTimeSteps);
timer.Start();
handleTimeStepCallCount = 0;
clock.Update(new TimeSpan(timeIncrement.Ticks * 6));
Assert.AreEqual(6, handleTimeStepCallCount);
handleTimeStepCallCount = 0;
clock.Update(timeIncrement);
Assert.AreEqual(1, handleTimeStepCallCount);
handleTimeStepCallCount = 0;
clock.Update(new TimeSpan(timeIncrement.Ticks / 2));
Assert.AreEqual(0, handleTimeStepCallCount);
clock.Update(new TimeSpan(timeIncrement.Ticks / 2));
Assert.AreEqual(1, handleTimeStepCallCount);
}
public void LostTime()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.Zero, timer.LostTime);
clock.Update(TimeSpan.FromMilliseconds(50));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(60), TimeSpan.FromMilliseconds(50));
Assert.AreEqual(TimeSpan.Zero, timer.LostTime);
clock.Update(TimeSpan.FromMilliseconds(51));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(110), TimeSpan.FromMilliseconds(50));
Assert.AreEqual(TimeSpan.FromMilliseconds(1), timer.LostTime);
clock.Update(TimeSpan.FromMilliseconds(49));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(150), TimeSpan.FromMilliseconds(40));
Assert.AreEqual(TimeSpan.Zero, timer.LostTime);
}
public async Task TestTimer100msInterval()
{
const int interval = 100;
var sut = new FixedStepTimer(TimeSpan.FromMilliseconds(interval));
var tickResults = new List <DateTime>();
var firstSignalTime = DateTime.MinValue;
sut.Tick += (s, e) =>
{
var signalTime = new DateTime(
1, 1, 1,
e.SignalTime.Hour,
e.SignalTime.Minute,
e.SignalTime.Second,
e.SignalTime.Millisecond
);
if (e.TickCount == 1)
{
firstSignalTime = signalTime;
}
tickResults.Add(signalTime);
};
try
{
sut.Start(true);
await Task.Delay(TimeSpan.FromSeconds(1));
sut.Stop();
}
finally
{
sut.Close();
}
const int tolerance = 10;
for (var i = 0; i < tickResults.Count; i++)
{
var want = firstSignalTime.AddMilliseconds(interval * i);
var got = tickResults[i];
var w = want.ToString("HH:mm:ss.fff");
var g = got.ToString("HH:mm:ss.fff");
var diff = got - want;
Trace.WriteLine($"want:[{w}]\tgot:[{g}] {diff.Milliseconds}ms");
var wantMillisecond = want.Millisecond;
var gotMillisecond = got.Millisecond;
var lowerLimit = wantMillisecond;
var upperLimit = wantMillisecond + tolerance;
bool ok = lowerLimit <= gotMillisecond && gotMillisecond <= upperLimit;
if (!ok)
{
Assert.Fail($"want:[{w}]\tgot:[{g}]");
}
}
Assert.AreEqual(11, sut.TickCount);
}
public void NormalRun()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
// Clock is running. Timer is stopped.
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckNoTimeChangedEvent();
// Start
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(20), TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(10), timer.DeltaTime);
// Pause
timer.Stop();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckNoTimeChangedEvent();
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.Time);
// Resume
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(30), TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.FromMilliseconds(30), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(10), timer.DeltaTime);
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
// Time step = 3 ∙ step size
clock.Update(TimeSpan.FromMilliseconds(34));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(60), TimeSpan.FromMilliseconds(30));
Assert.AreEqual(TimeSpan.FromMilliseconds(60), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(30), timer.DeltaTime);
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
// Time step = 3 ∙ step size
// (27 ms + 4 ms from previous step = 31 ms)
clock.Update(TimeSpan.FromMilliseconds(27));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(90), TimeSpan.FromMilliseconds(30));
Assert.AreEqual(TimeSpan.FromMilliseconds(90), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(30), timer.DeltaTime);
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
// Time step = step size
// (9 ms + 1 ms from previous step = 10 ms)
clock.Update(TimeSpan.FromMilliseconds(9));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(100), TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.FromMilliseconds(100), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(10), timer.DeltaTime);
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
}
public void NegativeScale()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Speed = -2.0;
timer.Start();
Assert.AreEqual(-2.0, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-20), TimeSpan.FromMilliseconds(-20));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-40), TimeSpan.FromMilliseconds(-20));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(21));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-80), TimeSpan.FromMilliseconds(-40));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(2));
CheckIdleEvent(TimeSpan.FromMilliseconds(4));
CheckNoTimeChangedEvent();
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(4));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-90), TimeSpan.FromMilliseconds(-10));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(1));
CheckIdleEvent(TimeSpan.FromMilliseconds(4));
CheckNoTimeChangedEvent();
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(13));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-120), TimeSpan.FromMilliseconds(-30));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
// 1 ms wall clock time remaining from previous step.
clock.Update(TimeSpan.FromMilliseconds(25));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-170), TimeSpan.FromMilliseconds(-50));
Assert.AreEqual(TimeSpan.FromMilliseconds(2), timer.LostTime);
}
public void TimerReset()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Reset();
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
timer.Reset();
Assert.IsFalse(timer.IsRunning);
Assert.AreEqual(TimeSpan.Zero, timer.Time);
Assert.AreEqual(TimeSpan.Zero, timer.DeltaTime);
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(20), TimeSpan.FromMilliseconds(10));
timer.Stop();
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.Time);
Assert.AreEqual(TimeSpan.Zero, timer.DeltaTime);
timer.Reset();
Assert.AreEqual(TimeSpan.Zero, timer.Time);
Assert.AreEqual(TimeSpan.Zero, timer.DeltaTime);
}
public void SwitchClocks()
{
ManualClock clock1 = new ManualClock();
ManualClock clock2 = new ManualClock();
clock1.Start();
clock2.Start();
IGameTimer timer = new FixedStepTimer(clock1)
{
StepSize = TimeSpan.FromMilliseconds(10),
};
timer.TimeChanged += timer_TimeChanged;
timer.Start();
clock1.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
timer.Clock = clock2;
Assert.AreSame(clock2, timer.Clock);
clock1.Update(TimeSpan.FromMilliseconds(10));
CheckNoTimeChangedEvent();
clock2.Update(TimeSpan.FromMilliseconds(20));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(30), TimeSpan.FromMilliseconds(20));
timer.Clock = null;
Assert.IsNull(timer.Clock);
clock1.Update(TimeSpan.FromMilliseconds(10));
clock2.Update(TimeSpan.FromMilliseconds(20));
CheckNoTimeChangedEvent();
Assert.AreEqual(TimeSpan.FromMilliseconds(30), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.DeltaTime);
}
public void Scale()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.TimeChanged += timer_TimeChanged;
timer.Start();
Assert.AreEqual(1.0, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(20), TimeSpan.FromMilliseconds(10));
timer.Speed = 0.5;
Assert.AreEqual(0.5, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoTimeChangedEvent();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(30), TimeSpan.FromMilliseconds(10));
timer.Speed = 2.0;
Assert.AreEqual(2.0, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(50), TimeSpan.FromMilliseconds(20));
timer.Speed = -3.0;
Assert.AreEqual(-3.0, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(20), TimeSpan.FromMilliseconds(-30));
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(-30), timer.DeltaTime);
}
public void NormalRun()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
// Clock is running. Timer is stopped.
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckNoTimeChangedEvent();
// Start
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(20), TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(10), timer.DeltaTime);
// Pause
timer.Stop();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckNoTimeChangedEvent();
Assert.AreEqual(TimeSpan.FromMilliseconds(20), timer.Time);
// Resume
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(30), TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.FromMilliseconds(30), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(10), timer.DeltaTime);
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
// Time step = 3 ∙ step size
clock.Update(TimeSpan.FromMilliseconds(34));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(60), TimeSpan.FromMilliseconds(30));
Assert.AreEqual(TimeSpan.FromMilliseconds(60), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(30), timer.DeltaTime);
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
// Time step = 3 ∙ step size
// (27 ms + 4 ms from previous step = 31 ms)
clock.Update(TimeSpan.FromMilliseconds(27));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(90), TimeSpan.FromMilliseconds(30));
Assert.AreEqual(TimeSpan.FromMilliseconds(90), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(30), timer.DeltaTime);
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
// Time step = step size
// (9 ms + 1 ms from previous step = 10 ms)
clock.Update(TimeSpan.FromMilliseconds(9));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(100), TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.FromMilliseconds(100), timer.Time);
Assert.AreEqual(TimeSpan.FromMilliseconds(10), timer.DeltaTime);
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
}
public void AccumulatedTime()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.Zero, timer.AccumulatedTime);
clock.Update(TimeSpan.FromMilliseconds(3));
Assert.AreEqual(TimeSpan.FromMilliseconds(3), timer.AccumulatedTime);
clock.Update(TimeSpan.FromMilliseconds(6));
Assert.AreEqual(TimeSpan.FromMilliseconds(9), timer.AccumulatedTime);
clock.Update(TimeSpan.FromMilliseconds(12));
Assert.AreEqual(TimeSpan.FromMilliseconds(1), timer.AccumulatedTime);
// MaxNumberOfSteps exceeded:
clock.Update(TimeSpan.FromMilliseconds(1000000));
Assert.AreEqual(TimeSpan.Zero, timer.AccumulatedTime);
// Accumulated steps.
timer.AccumulateTimeSteps = true;
clock.Update(TimeSpan.FromMilliseconds(22));
Assert.AreEqual(TimeSpan.FromMilliseconds(2), timer.AccumulatedTime);
timer.AccumulateTimeSteps = false;
clock.Update(TimeSpan.FromMilliseconds(22));
timer.TimeChanged += (s, e) =>
{
if (timer.PendingSteps > 0)
Assert.AreEqual(TimeSpan.Zero, timer.AccumulatedTime);
else
Assert.AreEqual(TimeSpan.FromMilliseconds(4), timer.AccumulatedTime);
};
}
public void LostTime()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Start();
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(10), TimeSpan.FromMilliseconds(10));
Assert.AreEqual(TimeSpan.Zero, timer.LostTime);
clock.Update(TimeSpan.FromMilliseconds(50));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(60), TimeSpan.FromMilliseconds(50));
Assert.AreEqual(TimeSpan.Zero, timer.LostTime);
clock.Update(TimeSpan.FromMilliseconds(51));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(110), TimeSpan.FromMilliseconds(50));
Assert.AreEqual(TimeSpan.FromMilliseconds(1), timer.LostTime);
clock.Update(TimeSpan.FromMilliseconds(49));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(150), TimeSpan.FromMilliseconds(40));
Assert.AreEqual(TimeSpan.Zero, timer.LostTime);
}
public void NegativeScale()
{
ManualClock clock = new ManualClock();
clock.Start();
FixedStepTimer timer = new FixedStepTimer(clock)
{
StepSize = TimeSpan.FromMilliseconds(10),
MaxNumberOfSteps = 5,
};
timer.Idle += timer_Idle;
timer.TimeChanged += timer_TimeChanged;
timer.Speed = -2.0;
timer.Start();
Assert.AreEqual(-2.0, timer.Speed);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-20), TimeSpan.FromMilliseconds(-20));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(10));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-40), TimeSpan.FromMilliseconds(-20));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(21));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-80), TimeSpan.FromMilliseconds(-40));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(2));
CheckIdleEvent(TimeSpan.FromMilliseconds(4));
CheckNoTimeChangedEvent();
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(4));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-90), TimeSpan.FromMilliseconds(-10));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(1));
CheckIdleEvent(TimeSpan.FromMilliseconds(4));
CheckNoTimeChangedEvent();
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
clock.Update(TimeSpan.FromMilliseconds(13));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-120), TimeSpan.FromMilliseconds(-30));
Assert.AreEqual(0, timer.AccumulatedSteps);
Assert.AreEqual(0, timer.PendingSteps);
// 1 ms wall clock time remaining from previous step.
clock.Update(TimeSpan.FromMilliseconds(25));
CheckNoIdleEvent();
CheckTimeChangedEvent(TimeSpan.FromMilliseconds(-170), TimeSpan.FromMilliseconds(-50));
Assert.AreEqual(TimeSpan.FromMilliseconds(2), timer.LostTime);
}