protected override void Update()
{
// samples
// A B
// Parent -2 -1
// Intergal -1 [Add]
double value = 0;
double timeA = -1;
double timeB = -1;
int countI = this.GetSampleCount();
if (countI > 0)
{
var sA = this.GetSample(-1);
value = sA.value;
timeA = sA.time;
}
int countP = _original.GetSampleCount();
Debug.Assert(countP > 0);
if (countP == 1)
{
var sB = _original.GetSample(-1);
timeB = sB.time;
}
else
{
var sA = _original.GetSample(-2);
var sB = _original.GetSample(-1);
Debug.Assert(countI == 0 || timeA == sA.time);
timeB = sB.time;
double S = (timeB - timeA) * (sA.value + sB.value) / 2 * _scale;
//value += S;
#if true
value = value + S;
#else
double dt = timeB - timeA; // (0..
//double c = Math.Pow(0.001, dt * 1);
double c = Math.Exp(-dt * 3); // c==1 if dt==0
value = (value * c) + S * (1.0 - c);
Debug.WriteLine("Integrate: dt {0:0.0000} S {1:0.0000} c {2:0.0000} value {3}", dt, S, c, value);
#endif
}
base.Add(timeB, value);
}
protected override void Update()
{
double value = 0;
var s1 = _original.GetSample(-1);
var s2 = _original.GetSample(-2);
Debug.Assert(s1.IsValid());
if (s2.IsValid())
{
value = (s1.value - s2.value) / (s1.time - s2.time) * _scale;
}
Add(s1.time, value);
}
protected override void Update()
{
var s1 = _original.GetSample(-1);
var s2 = _original.GetSample(-2);
Debug.Assert(s1.IsValid());
if (s2.IsValid())
{
int sign = Math.Sign(s1.value - s2.value);
if (_lastSign != sign)
{
if (_lastSign != 0) // s2 was an extrema - collect its time and sign
{
Add(s2.time, _lastSign);
}
_lastSign = sign;
}
}
}
protected override void Update()
{
var sO = _original.GetSample(-2);
var sE = _extremas.GetSample(-1);
if (sO.IsValid() && sE.IsValid())
{
if (sE.time == sO.time && sE.value == _sign)
{
base.Add(sO.time, sO.value);
}
}
}
public void DrawSignal(Image image, double currentTime, double timeSpan, SignalSamples signal, Color color, double scaleY = 1.0)
{
int segmentLimit = 200; //!!! configure
var poses = new List <Point>();
for (int i = 1; i <= segmentLimit; ++i)
{
var s = signal.GetSample(-i);
if (!s.IsValid())
{
break; // no more samples
}
double t = s.time - currentTime;
Point pos = new Point((float)t, (float)(s.value * scaleY));
poses.Insert(0, pos);
if (t < -timeSpan)
{
break; // gone out of view
}
}
DrawSignal(image, poses.ToArray(), color);
}