/// <summary>
/// Instantiating a record from a list of shifts
/// </summary>
/// <param name="xShift">X shifts.</param>
/// <param name="yShift">Y shifts.</param>
public ForwardReachResult(MotionShift xShift, MotionShift yShift)
{
FirstShiftRecordNum = new int?[]
{
xShift.GetPhaseShiftPoint(0),
yShift.GetPhaseShiftPoint(0)
};
SecondShiftRecordNum = new int?[]
{
xShift.GetPhaseShiftPoint(1),
yShift.GetPhaseShiftPoint(1)
};
ThirdShiftRecordNum = new int?[]
{
xShift.GetPhaseShiftPoint(2),
yShift.GetPhaseShiftPoint(2)
};
}
/// <summary>
/// Analyze the specified input and parameters.
/// </summary>
/// <returns>The analyze.</returns>
/// <param name="inputs">Input.</param>
/// <param name="parameters">Parameters.</param>
public IEnumerable <ICsvWritable> Analyze(IEnumerable <SensorReading> inputs,
IEnumerable <Parameter> parameters)
{
var results = new List <ForwardReachResult>();
// parse out parameters
var accelParam = parameters.FirstOrDefault(x => x.Field.Equals(CommandParameters.Acceleration));
var accelXParam = parameters.FirstOrDefault(x => x.Field.Equals(CommandParameters.AccelX));
var accelYParam = parameters.FirstOrDefault(x => x.Field.Equals(CommandParameters.AccelY));
if (accelParam == null || accelXParam == null || accelYParam == null)
{
return(null);
}
// parse out clause values
var windowSize = int.Parse(accelParam.GetClauseValue(CommandParameters.Window));
var margin = int.Parse(accelParam.GetClauseValue(CommandParameters.Margin));
var accelXThreshold = decimal.Parse(accelXParam.GetClauseValue(CommandParameters.Threshold));
var accelYThreshold = decimal.Parse(accelYParam.GetClauseValue(CommandParameters.Threshold));
// iterate through input records with a single-record sliding window
var currentInputs = new List <SensorReading>();
foreach (var input in inputs)
{
// add new inputs to the collection until it is full
if (currentInputs.Count() < windowSize)
{
currentInputs.Add(input);
}
// once it is full, check for reach behavior match
if (currentInputs.Count() == windowSize)
{
// convert raw accel-x vals into motion shift obj
var xShift = new MotionShift {
Axis = Constants.BAT.Axes.X
};
xShift.SetPhases(currentInputs);
// convert raw accel-y vals into motion shift obj
var yShift = new MotionShift {
Axis = Constants.BAT.Axes.Y
};
yShift.SetPhases(currentInputs);
// determine if shifts meet "forward reach" behavior expectations
var isForwardReachOnX = xShift.IsForwardReach(accelXThreshold);
var isForwardReachOnY = yShift.IsForwardReach(accelYThreshold);
var shiftsAreWithinMargins = xShift.WithinMargins(yShift, margin);
if (isForwardReachOnX && isForwardReachOnY && shiftsAreWithinMargins)
{
var newResult = new ForwardReachResult(xShift, yShift);
if (!results.Any(x => x.Matches(newResult)))
{
results.Add(newResult);
}
// if match found, shift current input collection
// by one half window size and continue
for (int i = 0; i < (windowSize / 2); i++)
{
currentInputs.RemoveAt(i);
}
continue;
}
// if no match found, remove the first record and go again
currentInputs.RemoveAt(0);
}
}
return(results.Distinct());
}
