/// <summary>
/// Traverse the tree, building up the color palette
/// </summary>
/// <param name="palette">The palette</param>
/// <param name="index">The current palette index</param>
public void ConstructPalette(TPixel[] palette, ref int index)
{
if (this.leaf)
{
// This seems faster than using Vector4
byte r = (this.red / this.pixelCount).ToByte();
byte g = (this.green / this.pixelCount).ToByte();
byte b = (this.blue / this.pixelCount).ToByte();
// And set the color of the palette entry
TPixel pixel = default;
pixel.PackFromRgba32(new Rgba32(r, g, b, 255));
palette[index] = pixel;
// Consume the next palette index
this.paletteIndex = index++;
}
else
{
// Loop through children looking for leaves
for (int i = 0; i < 8; i++)
{
if (this.children[i] != null)
{
this.children[i].ConstructPalette(palette, ref index);
}
}
}
}
public override Image <TPixel> GetImage()
{
Image <TPixel> image = base.GetImage();
TPixel color = default(TPixel);
color.PackFromRgba32(new Rgba32(this.r, this.g, this.b, this.a));
return(image.Fill(color));
}
public void ConstructPalette(TPixel[] palette, ref int index)
{
if (this.leaf)
{
// Set the color of the palette entry
var vector = Vector3.Clamp(new Vector3(this.red, this.green, this.blue) / this.pixelCount, Vector3.Zero, new Vector3(255));
TPixel pixel = default;
pixel.PackFromRgba32(new Rgba32((byte)vector.X, (byte)vector.Y, (byte)vector.Z, byte.MaxValue));
palette[index] = pixel;
// Consume the next palette index
this.paletteIndex = index++;
}
else
{
// Loop through children looking for leaves
for (int i = 0; i < 8; i++)
{
this.children[i]?.ConstructPalette(palette, ref index);
}
}
}