private static double calculateSlope(BgReading current, BgReading last)
{
if (current.Timestamp == last.Timestamp)
{
return(0.0);
}
return((last._glucose - current._glucose) / (last.Timestamp - current.Timestamp));
}
public static string GetGlucoseDirection(BgReading current, BgReading last)
{
//converted from:
//https://github.com/NightscoutFoundation/xDrip/blob/b34e63223573a367105b31536e413d4b83b78dab/app/src/main/java/com/eveningoutpost/dexdrip/Models/BgReading.java#L563
double sloapPerMinute = calculateSlopeByMinute(current, last);
String arrow = "Unknown";
if (sloapPerMinute <= (-3.5))
{
arrow = "DoubleDown";
}
else if (sloapPerMinute <= (-2))
{
arrow = "SingleDown";
}
else if (sloapPerMinute <= (-1))
{
arrow = "FortyFiveDown";
}
else if (sloapPerMinute <= (1))
{
arrow = "Flat";
}
else if (sloapPerMinute <= (2))
{
arrow = "FortyFiveUp";
}
else if (sloapPerMinute <= (3.5))
{
arrow = "SingleUp";
}
else if (sloapPerMinute <= (40))
{
arrow = "DoubleUp";
}
return(arrow);
}
public string GetRelativeGlucoseDirection(BgReading otherReading)
{
return(GlucoseMath.GetGlucoseDirection(this, otherReading));
}
private static double calculateSlopeByMinute(BgReading current, BgReading last)
{
return(calculateSlope(current, last) * 60000);
}
