///
/// The smaller the number returned by this, the closer the colors are
///
///
///
public float CompareTo(ColorFormulas oComparisionColor)
{
// Based upon the Delta-E (1976) formula at easyrgb.com (http://www.easyrgb.com/index.php?X=DELT&H=03#text3)
double DeltaE = Math.Sqrt(Math.Pow((CieL - oComparisionColor.CieL), 2) + Math.Pow((CieA - oComparisionColor.CieA), 2) + Math.Pow((CieB - oComparisionColor.CieB), 2));
return(Mathf.Round((float)DeltaE));
}
public static float DoFullCompare(Color a, Color b)
{
ColorFormulas oColor1 = new ColorFormulas(a.r, a.g, a.b);
ColorFormulas oColor2 = new ColorFormulas(b.r, b.g, b.b);
return(oColor1.CompareTo(oColor2));
}
Tile findClosestTile(List <Tile> tilesList, Color c)
{
var smallestDifference = Double.MaxValue;
Tile closestTile = null;
// express the colour as a Delta-E colour to be used in the colour distance calculations
ColorFormulas deltaEPixelcolor = new ColorFormulas(c.R, c.G, c.B);
foreach (Tile tile in tilesList)
{
// ignore all tiles that have been disabled
if (tile.enabled == false)
{
continue;
}
// calculate the colour difference using the Delta-E formulas
var deltaEDifference = tile.colorFormulas.CompareTo(deltaEPixelcolor);
if ((deltaEDifference < smallestDifference))
{
smallestDifference = deltaEDifference;
closestTile = tile;
}
}
return(closestTile);
}
