/// <summary>
/// This method calculates visual apparent "distance" of colors
/// </summary>
/// <param name="e1">first color to compare</param>
/// <param name="e2">second color to compare</param>
/// <returns>Return number representing distance .. values under 30 000 or so seems similar</returns>
public static int Distance(MyCol e1, MyCol e2)
{
int r, g, b;
int rmean;
rmean = (e1.R + e2.R) / 2;
r = e1.R - e2.R;
g = e1.G - e2.G;
b = e1.B - e2.B;
return (((512 + rmean) * r * r) >> 8) + 4 * g * g + (((767 - rmean) * b * b) >> 8);
}
/// <summary>
/// This method calculates visual apparent "distance" of colors
/// </summary>
/// <param name="e1">first color to compare</param>
/// <param name="e2">second color to compare</param>
/// <returns>Return number representing distance .. values under 30 000 or so seems similar</returns>
public static int Distance(MyCol e1, MyCol e2)
{
int r, g, b;
int rmean;
rmean = (e1.R + e2.R) / 2;
r = e1.R - e2.R;
g = e1.G - e2.G;
b = e1.B - e2.B;
return((((512 + rmean) * r * r) >> 8) + 4 * g * g + (((767 - rmean) * b * b) >> 8));
}
/// <summary>
/// Tries to change one color to not be so similar to others
/// </summary>
/// <param name="input">array of colors to process</param>
/// <param name="index">index of current color to check against others</param>
/// <param name="bestCol">output color (most far from others)</param>
/// <returns>minimum distance of best colors to others</returns>
public static int GetBestRelocation(MyCol[] input, int index, out MyCol bestCol)
{
int bestVal;
bestCol = new MyCol(0, 0, 0);
bestVal = int.MinValue;
var temp = new MyCol();
for (short r = 20; r <= 255; r += 3)
{
for (short g = 20; g <= 255; g += 3)
{
for (short b = 50; b <= 255; b += 3)
{
temp.R = (byte)r;
temp.G = (byte)g;
temp.B = (byte)b;
var minDist = int.MaxValue;
for (var i = 0; i < input.Length; ++i)
{
if (i == index)
{
continue;
}
var cDistance = temp % input[i];
if (cDistance <= bestVal)
{
minDist = int.MinValue;
break;
}
if (cDistance < minDist)
{
minDist = cDistance;
}
}
if (minDist > bestVal)
{
bestVal = minDist;
bestCol = temp;
}
}
}
}
return(bestVal);
}
/// <summary>
/// Tries to change one color to not be so similar to others
/// </summary>
/// <param name="input">array of colors to process</param>
/// <param name="index">index of current color to check against others</param>
/// <param name="bestCol">output color (most far from others)</param>
/// <returns>minimum distance of best colors to others</returns>
public static int GetBestRelocation(MyCol[] input, int index, out MyCol bestCol)
{
int bestVal;
bestCol = new MyCol(0, 0, 0);
bestVal = int.MinValue;
var temp = new MyCol();
for (short r = 20; r <= 255; r += 3)
{
for (short g = 20; g <= 255; g += 3)
{
for (short b = 50; b <= 255; b += 3)
{
temp.R = (byte)r;
temp.G = (byte)g;
temp.B = (byte)b;
var minDist = int.MaxValue;
for (var i = 0; i < input.Length; ++i)
{
if (i == index) continue;
var cDistance = temp % input[i];
if (cDistance <= bestVal)
{
minDist = int.MinValue;
break;
}
if (cDistance < minDist) minDist = cDistance;
}
if (minDist > bestVal)
{
bestVal = minDist;
bestCol = temp;
}
}
}
}
return bestVal;
}
/// <summary>
/// Processes input array of colors and if some colors are too similar, it changes them to be more different
/// </summary>
/// <param name="input">Array of colors to process</param>
/// <param name="balanceDistance">Treshold distance, if two colors are more similar than this, it changes one of them</param>
public static void FixColors(MyCol[] input, int balanceDistance)
{
for (var i = 0; i < input.Length - 1; ++i) for (var j = i + 1; j < input.Length; ++j) if (input[i] % input[j] < balanceDistance) GetBestRelocation(input, i, out input[i]);
}
public int Distance(MyCol e2)
{
return Distance(this, e2);
}
public int Distance(MyCol e2)
{
return(Distance(this, e2));
}
