public static void DrawWave(Graphics g,
RectangleF r,
float phase,
IStream Source)
{
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
DrawPaper(g, r);
phase = Source?.ElapsedTime ?? 0;
float hz = Source?.Hz ?? 0;
float[] X =
Source?.Read();
if (X == null)
{
return;
}
DrawFunction(g, r, (i, cc) => Envelopes.Hann(i, cc) * X[i * X.Length / cc], Brushes.DarkOrange);
var fft = Complex.FFT(X);
X = Complex.InverseFFT(fft);
DrawFunction(g, r, (i, cc) => Envelopes.Hann(i, cc) * X[i * X.Length / cc], Brushes.DarkViolet);
DrawLabels(g, r, Source.ElapsedTime, hz, X);
}
public static void Envelope(float[] X)
{
var samples = X.Length;
for (int s = 0; s < samples; s++)
{
X[s] = X[s]
* (float)Envelopes.Hann(s, samples);
}
}
