public static ColorPair GetColorFromPairNumber(int pairNumber)
{
// The function supports only 1 based index. Pair numbers valid are from 1 to 25
int minorSize = colorMapMinor.Length;
int majorSize = colorMapMajor.Length;
if (pairNumber < 1 || pairNumber > minorSize * majorSize)
{
throw new ArgumentOutOfRangeException(
string.Format("Argument PairNumber:{0} is outside the allowed range", pairNumber));
}
// Find index of major and minor color from pair number
int zeroBasedPairNumber = pairNumber - 1;
int majorIndex = zeroBasedPairNumber / minorSize;
int minorIndex = zeroBasedPairNumber % minorSize;
// Construct the return val from the arrays
ColorPair pair = new ColorPair()
{
majorColor = colorMapMajor[majorIndex],
minorColor = colorMapMinor[minorIndex]
};
// return the value
return(pair);
}
public static int GetPairNumberFromColor(ColorPair pair)
{
// Find the major color in the array and get the index
int majorIndex = -1;
for (int i = 0; i < colorMapMajor.Length; i++)
{
if (colorMapMajor[i] == pair.majorColor)
{
majorIndex = i;
break;
}
}
// Find the minor color in the array and get the index
int minorIndex = -1;
for (int i = 0; i < colorMapMinor.Length; i++)
{
if (colorMapMinor[i] == pair.minorColor)
{
minorIndex = i;
break;
}
}
// If colors can not be found throw an exception
if (majorIndex == -1 || minorIndex == -1)
{
throw new ArgumentException(
string.Format("Unknown Colors: {0}", pair.ToString()));
}
// Compute pair number and Return(Note: +1 in compute is because pair number is 1 based, not zero)
return((majorIndex * colorMapMinor.Length) + (minorIndex + 1));
}