/// <summary>
/// Starts a new lap
/// </summary>
public ILapSummary NewLap()
{
var lap = new MemoryLap();
_laps.NewLap(lap);
return(lap);
}
/// <summary>
/// Calculates decoupling values
/// </summary>
private void CalculateDecoupling()
{
if (TimeFrames.Count < 2)
{
_powerHeartRateDecoupling = 0;
_paceHeartRateDecoupling = 0;
}
else
{
var firstHalf = new MemoryLap(); // first half
var secondHalf = new MemoryLap(); // second half
foreach (var timeFrame in TimeFrames)
{
if (timeFrame.Timestamp.Subtract(StartTime).TotalSeconds < ElapsedTime * 0.5)
{
firstHalf.AddTimeFrame(timeFrame);
}
else
{
secondHalf.AddTimeFrame(timeFrame);
}
}
if (firstHalf.AvgHeartRate == 0 || secondHalf.AvgHeartRate == 0 || firstHalf.AvgPower == 0)
{
_powerHeartRateDecoupling = double.NaN;
}
else
{
_powerHeartRateDecoupling = ((double)firstHalf.AvgPower / firstHalf.AvgHeartRate - (double)secondHalf.AvgPower / secondHalf.AvgHeartRate) /
((double)firstHalf.AvgPower / firstHalf.AvgHeartRate);
}
const SpeedUnit speedUnit = SpeedUnit.MeterPerSecond;
if (firstHalf.AvgHeartRate == 0 || secondHalf.AvgHeartRate == 0 || firstHalf.AvgSpeed.GetValueAs(speedUnit) == 0)
{
_paceHeartRateDecoupling = double.NaN;
}
else
{
_paceHeartRateDecoupling = (firstHalf.AvgSpeed.GetValueAs(speedUnit) / firstHalf.AvgHeartRate - secondHalf.AvgSpeed.GetValueAs(speedUnit) / secondHalf.AvgHeartRate) /
(firstHalf.AvgSpeed.GetValueAs(speedUnit) / firstHalf.AvgHeartRate);
}
}
}