public int CompareTo(Color other)
{
int comparison;
var thisCategory = GetColorCategory();
comparison = ((int)thisCategory).CompareTo((int)other.GetColorCategory());
if (comparison != 0)
{
return(comparison);
}
comparison = ColorConversion.RgbToLum(ColorConversion.ColorToRgb(this))
.CompareTo(ColorConversion.RgbToLum(ColorConversion.ColorToRgb(other)));
if ((int)thisCategory % 2 == 0)
{
comparison = -comparison;
}
if (comparison != 0)
{
return(comparison);
}
return(comparison);
}
private static Vector3i ColorToPoint(Color color)
{
var rgb = ColorConversion.ColorToRgb(color);
var xyz = ColorConversion.RgbToXyz(rgb);
var lab = ColorConversion.XyzToLab(xyz);
return(lab);
}
public Texture3D(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
int[] bitmapArray;
using (var image = Image.FromStream(stream))
using (var bitmap = new Bitmap(image))
{
BitmapData bitmapData = null;
try
{
bitmapData = bitmap.LockBits(
new Rectangle(Point.Empty, bitmap.Size),
ImageLockMode.ReadOnly,
PixelFormat.Format32bppArgb);
Trace.Assert(bitmapData.Stride % sizeof(int) == 0);
bitmapArray = new int[(bitmapData.Stride / sizeof(int)) * bitmapData.Height];
Marshal.Copy(bitmapData.Scan0, bitmapArray, 0, bitmapArray.Length);
Pixels = new Vector3[
bitmapData.Height,
bitmapData.Height,
bitmapData.Width / bitmapData.Height
];
}
finally
{
if (bitmapData != null)
{
bitmap.UnlockBits(bitmapData);
}
}
}
var size = Size;
var w = size[0];
var h = size[1];
var d = size[2];
var stride = w * d;
for (var i = 0; i < bitmapArray.Length; i++)
{
var x = i % w;
var y = i / stride;
y = (h - 1) - y; // Invert y axis
var z = (i / w) % d;
var color = Color.FromUint((uint)bitmapArray[i]);
var rgb = ColorConversion.ColorToRgb(color);
Pixels[x, y, z] = rgb;
}
}
private ColorCategory GetColorCategory()
{
var rgb = ColorConversion.ColorToRgb(this);
var hsv = ColorConversion.RgbToHsv(rgb);
if (hsv[1] < 0.12f)
{
return(ColorCategory.Grays);
}
float lumCutoff;
if (hsv[1] > 0.9)
{
lumCutoff = 0.1f;
}
else if (hsv[1] > 0.8)
{
lumCutoff = 0.13f;
}
else if (hsv[1] > 0.6)
{
lumCutoff = 0.19f;
}
else if (hsv[1] > 0.4)
{
lumCutoff = 0.22f;
}
else
{
lumCutoff = 0.28f;
}
var lum = Math.Sqrt(ColorConversion.RgbToLum(rgb));
if (lum < lumCutoff)
{
return(ColorCategory.Grays);
}
if (hsv[0] <= 26)
{
return(ColorCategory.Red);
}
if (hsv[0] <= 44)
{
return(ColorCategory.Orange);
}
if (hsv[0] <= 69)
{
return(ColorCategory.Yellow);
}
if (hsv[0] <= 152)
{
return(ColorCategory.Green);
}
if (hsv[0] <= 184)
{
return(ColorCategory.Cyan);
}
if (hsv[0] <= 257)
{
return(ColorCategory.Blue);
}
if (hsv[0] <= 296)
{
return(ColorCategory.Purple);
}
if (hsv[0] <= 330)
{
return(ColorCategory.Pink);
}
return(ColorCategory.Red);
}
