private void UpdateZ()
{
double scale = mPoleZeroScale[comboBoxPoleZeroScale.SelectedIndex];
PoleZeroDispMode dispMode = (PoleZeroDispMode)comboBoxPoleZeroDispMode.SelectedIndex;
var im = new Image();
var bm = new WriteableBitmap(
512,
512,
96,
96,
dispMode == PoleZeroDispMode.Magnitude ? PixelFormats.Gray32Float : PixelFormats.Bgra32,
null);
var pxF = new float[bm.PixelHeight * bm.PixelWidth];
var pxBgra = new int[bm.PixelHeight * bm.PixelWidth];
im.Source = bm;
im.Stretch = Stretch.None;
im.HorizontalAlignment = HorizontalAlignment.Left;
im.VerticalAlignment = VerticalAlignment.Top;
int pos = 0;
for (int yI = 0; yI < bm.PixelHeight; yI++)
{
for (int xI = 0; xI < bm.PixelWidth; xI++)
{
double y = 2.6666666666666 / scale * (bm.PixelHeight / 2 - yI) / bm.PixelHeight;
double x = 2.6666666666666 / scale * (xI - bm.PixelWidth / 2) / bm.PixelHeight;
var z = new WWComplex(x, y);
var h = EvalH(z);
var hM = h.Magnitude();
if (hM < 0.1)
{
hM = 0.1;
}
float hL = (float)((Math.Log10(hM) + 1.0f) / 5.0f);
pxF[pos] = hL;
pxBgra[pos] = PhaseToBgra(h.Phase());
++pos;
}
}
switch (dispMode)
{
case PoleZeroDispMode.Magnitude:
bm.WritePixels(new Int32Rect(0, 0, bm.PixelWidth, bm.PixelHeight), pxF, bm.BackBufferStride, 0);
break;
case PoleZeroDispMode.Phase:
bm.WritePixels(new Int32Rect(0, 0, bm.PixelWidth, bm.PixelHeight), pxBgra, bm.BackBufferStride, 0);
break;
}
canvasZ.Children.Clear();
canvasZ.Children.Add(im);
double circleRadius = 192.0 * scale;
Ellipse unitCircle = new Ellipse {
Width = circleRadius * 2, Height = circleRadius * 2, Stroke = new SolidColorBrush {
Color = Colors.Black
}
};
unitCircle.Width = circleRadius * 2;
unitCircle.Height = circleRadius * 2;
canvasZ.Children.Add(unitCircle);
Canvas.SetLeft(unitCircle, 256.0 - circleRadius);
Canvas.SetTop(unitCircle, 256.0 - circleRadius);
Canvas.SetZIndex(unitCircle, 1);
}
/// <summary>
/// グラデーションサンプル表示。
/// </summary>
private void UpdateGradation()
{
PoleZeroDispMode dispMode = (PoleZeroDispMode)comboBoxPoleZeroDispMode.SelectedIndex;
float maxMagnitude = 5.0f;
var im = new Image();
var bm = new WriteableBitmap(
(int)canvasGradation.Width,
(int)canvasGradation.Height,
96,
96,
dispMode == PoleZeroDispMode.Magnitude ? PixelFormats.Gray32Float : PixelFormats.Bgra32,
null);
im.Source = bm;
im.Stretch = Stretch.None;
im.HorizontalAlignment = HorizontalAlignment.Left;
im.VerticalAlignment = VerticalAlignment.Top;
var pxF = new float[bm.PixelHeight * bm.PixelWidth];
var pxBgra = new int[bm.PixelHeight * bm.PixelWidth];
for (int yI = 0; yI < bm.PixelHeight; yI++)
{
double hM = maxMagnitude * yI / bm.PixelHeight;
if (hM < 0.1)
{
hM = 0.1;
}
float hL = (float)((Math.Log10(hM) + 1.0f) / 5.0f);
double phase = yI * 2.0 * Math.PI / bm.PixelHeight;
int bgra = PhaseToBgra(phase);
for (int xI = 0; xI < bm.PixelWidth; xI++)
{
// 下から上に塗る。
pxF[xI + (bm.PixelHeight - 1 - yI) * bm.PixelWidth] = hL;
pxBgra[xI + (bm.PixelHeight - 1 - yI) * bm.PixelWidth] = bgra;
}
}
if (dispMode == PoleZeroDispMode.Magnitude)
{
bm.WritePixels(new Int32Rect(0, 0, bm.PixelWidth, bm.PixelHeight), pxF, bm.BackBufferStride, 0);
}
else
{
bm.WritePixels(new Int32Rect(0, 0, bm.PixelWidth, bm.PixelHeight), pxBgra, bm.BackBufferStride, 0);
}
canvasGradation.Children.Clear();
canvasGradation.Children.Add(im);
double graduationScale;
string unitText;
if (dispMode == PoleZeroDispMode.Magnitude)
{
groupBoxPoleZeroLegend.Header = "Magnitude";
graduationScale = 1.0;
unitText = "";
}
else
{
groupBoxPoleZeroLegend.Header = "Phase";
graduationScale = 60.0;
unitText = "°";
}
labelGradation0.Content = string.Format("{0}{1}", 0.0 * graduationScale, unitText);
labelGradation1.Content = string.Format("{0}{1}", 1.0 * graduationScale, unitText);
labelGradation2.Content = string.Format("{0}{1}", 2.0 * graduationScale, unitText);
labelGradation3.Content = string.Format("{0}{1}", 3.0 * graduationScale, unitText);
labelGradation4.Content = string.Format("{0}{1}", 4.0 * graduationScale, unitText);
labelGradation5.Content = string.Format("{0}{1}", 5.0 * graduationScale, unitText);
labelGradation6.Content = string.Format("{0}{1}", 6.0 * graduationScale, unitText);
}
