///Constructor for datetime-value arguements:
public ChartPoint(DateTime time, decimal value)
{
x = Convert.ToInt64(Time.DateTimeToUnixTimeStamp(time.ToUniversalTime()));
y = value;
}
/// <summary>
/// Samples the given series
/// </summary>
/// <param name="series">The series to be sampled</param>
/// <param name="start">The date to start sampling, if before start of data then start of data will be used</param>
/// <param name="stop">The date to stop sampling, if after stop of data, then stop of data will be used</param>
/// <param name="truncateValues">True will truncate values to integers</param>
/// <returns>The sampled series</returns>
public Series Sample(Series series, DateTime start, DateTime stop, bool truncateValues = false)
{
var sampled = new Series(series.Name, series.SeriesType, series.Index, series.Unit);
// chart point times are always in universal, so force it here as well
double nextSample = Time.DateTimeToUnixTimeStamp(start.ToUniversalTime());
double unixStopDate = Time.DateTimeToUnixTimeStamp(stop.ToUniversalTime());
// we can't sample a single point and it doesn't make sense to sample scatter plots
// in this case just copy the raw data
if (series.Values.Count < 2 || series.SeriesType == SeriesType.Scatter)
{
// we can minimally verify we're within the start/stop interval
foreach (var point in series.Values)
{
if (point.x >= nextSample && point.x <= unixStopDate)
{
var samplePoint = point;
if (truncateValues)
{
// let's not modify the original
samplePoint = new ChartPoint(samplePoint)
{
y = Math.Truncate(samplePoint.y)
};
}
sampled.Values.Add(samplePoint);
}
}
return(sampled);
}
var enumerator = series.Values.GetEnumerator();
// initialize current/previous
enumerator.MoveNext();
ChartPoint previous = enumerator.Current;
enumerator.MoveNext();
ChartPoint current = enumerator.Current;
// make sure we don't start sampling before the data begins
if (nextSample < previous.x)
{
nextSample = previous.x;
}
// make sure to advance into the requestd time frame before sampling
while (current.x < nextSample && enumerator.MoveNext())
{
previous = current;
current = enumerator.Current;
}
do
{
// advance our current/previous
if (nextSample > current.x)
{
if (enumerator.MoveNext())
{
previous = current;
current = enumerator.Current;
}
else
{
break;
}
}
// iterate until we pass where we want our next point
while (nextSample <= current.x && nextSample <= unixStopDate)
{
var value = Interpolate(previous, current, (long)nextSample);
var point = new ChartPoint {
x = (long)nextSample, y = value
};
if (truncateValues)
{
point.y = Math.Truncate(point.y);
}
sampled.Values.Add(point);
nextSample += _seconds;
}
// if we've passed our stop then we're finished sampling
if (nextSample > unixStopDate)
{
break;
}
}while (true);
enumerator.DisposeSafely();
return(sampled);
}
//Bitcoin Handler:
public void OnData(Bitcoin data)
{
Debug(Time.ToLongTimeString() + " >> ALGO >> OnData(BTC) >> BTC: " + data.Close);
}
