private void CreateSF()
{
splinePoints = new List <SplineFunction>();
SplineFunction prev = null;
foreach (var pt in _points)
{
var splinePoints1 = new SplineFunction {
X = pt.X,
A = pt.Y
};
if (_points.IndexOf(pt) > 0)
{
splinePoints1.H = pt.X - prev.X;
}
splinePoints.Add(splinePoints1);
prev = splinePoints1;
}
if (splinePoints.Count == 0)
{
throw new InvalidOperationException("List is empty");
}
splinePoints[0].C = 0;
splinePoints[splinePoints.Count - 1].C = 0;
}
private void CalculatePoints()
{
int n = _steps * splinePoints.Count;
_pointsView = new List <PointF>(n);
_pointsView.Add(new PointF(splinePoints[0].X, splinePoints[0].Func()));
iPoints = new List <PointF>(n);
SplineFunction pf_prev = null;
float y = 0, y0 = 0, y1;
foreach (var pf in splinePoints)
{
if (splinePoints.IndexOf(pf) > 0)
{
float part = (pf.X - pf_prev.X) / _steps;
float X = pf_prev.X;
y1 = pf.I_Func(X);
for (int j = 0; j < _steps; j++)
{
X += part;
y = pf.Func(X);
_pointsView.Add(new PointF(X, y));
y = -y1 + y0 + pf.I_Func(X);
iPoints.Add(new PointF(X, y));
}
y0 = y;
}
pf_prev = pf;
}
}