protected override void OnRenderPixel(Image3D image, DisplayImage display, int x, int y)
{
double mipValue = double.MinValue;
for (int z = image.LengthZ - 1; z >= 0; z--)
{
mipValue = Math.Max(mipValue, image[x, y, z]);
}
display.SetPixel(x, y, Window.GetColor(mipValue));
}
protected override void OnRenderPixel(Image3D image, DisplayImage display, int x, int y)
{
var voxelColor = Colors.Black;
for (int z = image.LengthZ - 1; z >= 0; z--)
{
var color = tf.GetColor(image[x, y, z]);
voxelColor = ColorHelper.BlendAlpha(color, voxelColor);
}
display.SetPixel(x, y, voxelColor);
}
protected override void OnRenderPixel(Image3D image, DisplayImage display, int x, int y)
{
var voxel = image[x, y, 0];
display.SetPixel(x, y, Window.GetColor(voxel));
}
public void Render(DisplayImage display, TransferFunction1D tf)
{
// find max value
int histogramMax = 0;
int histogramMax2 = 0;
int histogramSum = 0;
for (int i = 0; i < histogramValues.Length; i++)
{
var v = histogramValues[i];
if (v > histogramMax)
{
histogramMax2 = histogramMax;
histogramMax = v;
}
if (v > histogramMax2 && v < histogramMax)
{
histogramMax2 = v;
}
histogramSum += v;
}
int histogramHeight = histogramSum * 4 / Count; // TODO: find a suitable height function
if (histogramHeight == 0) { histogramHeight = 1; } // avoid division by 0 error
// draw histogram values
int displayHeight = display.Height;
int displayWidth = display.Width;
double delta = (Maximum - Minimum) / Count;
for (int x = 0; x < displayWidth; x++)
{
int histogramIndexStart = (x * Count) / (displayWidth);
int histogramIndexEnd = ((x + 1) * Count) / (displayWidth);
int sum = 0;
for (int i = histogramIndexStart; i < histogramIndexEnd; i++)
{
sum += histogramValues[i];
}
int barHeight = Math.Min(displayHeight, (sum * displayHeight) / histogramHeight);
Color tfColor = tf.GetColor(Minimum + delta * x);
for (int y = 0; y < 3; y++)
{
display.SetPixel(x, y, tfColor);
}
for (int y = 3; y < (displayHeight - barHeight); y++)
{
if (y >= display.Height) { break; }
display.SetPixel(x, y, Colors.Transparent);
}
for (int y = (displayHeight - barHeight); y < displayHeight; y++)
{
if (y >= display.Height) { break; }
display.SetPixel(x, y, tfColor);
}
}
}