private static void GenerateColorRing(Bitmap bitmap, double bigY)
{
double centerX = (bitmap.Width - 1) / 2.0;
double centerY = (bitmap.Height - 1) / 2.0;
for (int y = 0; y < bitmap.Height; y++)
{
for (int x = 0; x < bitmap.Width; x++)
{
double dx = x - centerX;
double dy = y - centerY;
double dxp = dx / (bitmap.Width / 2.0);
double dyp = dy / (bitmap.Height / 2.0);
double dp = Math.Sqrt(dxp * dxp + dyp * dyp);
double angle = (Math.Atan2(dy, dx) / Math.PI + 1.0) * 3.0;
ColorVector color = new ColorVector();
if (angle < 1.0) // Red To Yellow.
{
color.Component1 = 1.0;
color.Component2 = angle;
}
else if (angle < 2.0) // Yellow To Green.
{
color.Component1 = 2.0 - angle;
color.Component2 = 1.0;
}
else if (angle < 3.0) // Green To Cyan.
{
color.Component2 = 1.0;
color.Component3 = angle - 2.0;
}
else if (angle < 4.0)//Cyan To Blue.
{
color.Component2 = 4.0 - angle;
color.Component3 = 1.0;
}
else if (angle < 5.0) // Blue To Purple.
{
color.Component1 = angle - 4.0;
color.Component3 = 1.0;
}
else // Purple To Red.
{
color.Component1 = 1.0;
color.Component3 = 6.0 - angle;
}
color.Component1 = 1.0 + (color.Component1 - 1.0) * dp;
color.Component2 = 1.0 + (color.Component2 - 1.0) * dp;
color.Component3 = 1.0 + (color.Component3 - 1.0) * dp;
color.ConvertLinearSRgbToSRgb();
bitmap.SetPixel(x, y, color.ToColor());
}
}
}
private static void GenerateXyyColors(Bitmap bitmap, double bigY)
{
double width = bitmap.Width - 1;
double height = bitmap.Width - 1;
for (int y = 0; y < bitmap.Height; y++)
{
for (int x = 0; x <= y; x++)
{
double cx = (x + 0.5) / width;
double cy = 1.0 - (y + 0.5) / height;
ColorVector colorVector = new ColorVector()
{
Component1 = cx,
Component2 = cy,
Component3 = bigY
};
colorVector.ConvertXyyToLinearSRgb();
if (colorVector.IsCanonical())
{
colorVector.ConvertLinearSRgbToSRgb();
bitmap.SetPixel(x, y, colorVector.ToColor());
}
}
}
}
private static void GenerateXyYPlane(Bitmap bitmap, double bigY)
{
for (int y = 0; y < bitmap.Height; y++)
{
for (int x = 0; x < bitmap.Width; x++)
{
double cx = (x + 0.5) / bitmap.Width;
double cy = (y + 0.5) / bitmap.Height;
ColorVector colorVector = new ColorVector(cx, cy, bigY);
colorVector.ConvertXyyToLinearSRgb();
colorVector.CompressLuminance();
colorVector.ConvertLinearSRgbToSRgb();
bitmap.SetPixel(x, bitmap.Height - 1 - y, colorVector.ToColor());
}
Console.WriteLine(y);
}
}
private static Tuple<Color, double, double>[] GenerateColors()
{
var result = new Tuple<Color, double, double>[256 * 256 * 256];
int i = 0;
for (short r = 0; r < 256; ++r)
{
for (short g = 0; g < 256; ++g)
{
for (short b = 0; b < 256; ++b)
{
ColorVector colorVector = new ColorVector(r / 255.0, g / 255.0, b / 255.0);
colorVector.ConvertSRgbToLinearSRgb();
colorVector.ConvertLinearSRgbToXyz();
colorVector.ConvertXyzToXyy();
double hue = Math.Atan2(colorVector.Component2 - D65.SmallY, colorVector.Component1 - D65.SmallX);
result[i] = new Tuple<Color, double, double>(Color.FromArgb(r, g, b), colorVector.Component3, hue);
if (i % 1000000 == 0)
{
Console.WriteLine(i);
}
i++;
}
}
}
return result;
}
private static Tuple<double, double, double> XyYToSRgb(double x, double y, double bigY)
{
ColorVector color = new ColorVector(x, y, bigY);
color.ConvertXyyToSRgbSmart();
return Tuple.Create(color.Component1, color.Component2, color.Component3);
}
