public void UpdateImages()
{
if (_mapData == null)
{
return;
}
int width = _mapData.Width;
int height = _mapData.Height;
if (Bitmap == null ||
Bitmap.PixelHeight != height ||
Bitmap.PixelWidth != width)
{
Bitmap = new WriteableBitmap(width, height);
}
ZMax = new Thickness(0, height, 0, 0);
if (ColorBar == null)
{
ColorBar = new WriteableBitmap(256, 1);
}
switch (ScalingTypeOptionVM.SelectedValue)
{
case ScalingType.Linear:
for (int i = 0; i < _mapData.RawData.Length; i++)
{
Bitmap.Pixels[i] = GetGrayscaleColor(_mapData.RawData[i], _MinValue, _MaxValue);
}
break;
case ScalingType.Log:
default:
if (_MinValue <= 0.0)
{
_MinValue = 10E-9;
}
if (_MaxValue <= 0.0)
{
_MaxValue = 10E2;
}
for (int i = 0; i < _mapData.RawData.Length; i++)
{
if (_mapData.RawData[i] >= 0)
{
Bitmap.Pixels[i] = GetGrayscaleColor(Math.Log10(_mapData.RawData[i]), Math.Log10(_MinValue), Math.Log10(_MaxValue));
}
else // clamp to Log10(min) if the value goes negative
{
Bitmap.Pixels[i] = GetGrayscaleColor(Math.Log10(_MinValue), Math.Log10(_MinValue), Math.Log10(_MaxValue));
}
}
break;
}
Bitmap.Invalidate(); //refreshes the image
for (int i = 0; i < ColorBar.PixelWidth; i++)
{
ColorBar.Pixels[i] = GetGrayscaleColor(i, 0, ColorBar.PixelWidth - 1);
}
ColorBar.Invalidate();
YExpectationValue = _mapData.YExpectationValue;
this.OnPropertyChanged("Bitmap");
this.OnPropertyChanged("ColorBar");
this.OnPropertyChanged("YExpectationValue");
}