public int GetIndex(UInt32 input)
{
int i = 0;
int minDelta = int.MaxValue;
int index = 0;
foreach (UInt32 color in palette)
{
int deltaR = Math.Abs(Color32Util.GetR(color) - Color32Util.GetR(input));
int deltaG = Math.Abs(Color32Util.GetG(color) - Color32Util.GetG(input));
int deltaB = Math.Abs(Color32Util.GetB(color) - Color32Util.GetB(input));
int delta = deltaR + deltaG + deltaB;
if (delta < minDelta)
{
minDelta = delta;
index = i;
}
i++;
}
return(index);
}
public void RecalcCentroid()
{
centroid = Vector3.zero;
foreach (UInt32 color in colors)
{
centroid.x += Color32Util.GetR(color);
centroid.y += Color32Util.GetG(color);
centroid.z += Color32Util.GetB(color);
}
centroid.x = centroid.x / (float)colors.Count;
centroid.y = centroid.y / (float)colors.Count;
centroid.z = centroid.z / (float)colors.Count;
}
public static float ColorDistance(UInt32 a, UInt32 b)
{
Vector3 e1 = new Vector3(Color32Util.GetR(a), Color32Util.GetG(a), Color32Util.GetB(a));
Vector3 e2 = new Vector3(Color32Util.GetR(b), Color32Util.GetG(b), Color32Util.GetB(b));
Vector3 rel = e2 - e1;
Vector3 d1 = new Vector3(2, 3, 4) - e1;
Vector3 d2 = new Vector3(2, 3, 4) - e2;
d1.Normalize();
d2.Normalize();
double ang = 2.0 - Math.Abs(Vector3.Dot(d1, d2));
double length = rel.magnitude;
return((float)(length * ang));
}
public int MiddleDelta(UInt32 color)
{
int count = _colors.Count;
if (count == 0)
{
return(int.MaxValue);
}
UInt32 middleColor = _colors[count / 2];
int deltaR = Math.Abs(Color32Util.GetR(color) - Color32Util.GetR(middleColor));
int deltaG = Math.Abs(Color32Util.GetG(color) - Color32Util.GetG(middleColor));
int deltaB = Math.Abs(Color32Util.GetB(color) - Color32Util.GetB(middleColor));
return(deltaR + deltaG + deltaB);
}
public void SortColors(Color32 range)
{
byte channel = BiggestChannel(range);
if (range.r == channel)
{
_colors.Sort((a, b) => Color32Util.GetR(a).CompareTo(Color32Util.GetR(b)));
}
else if (range.g == channel)
{
_colors.Sort((a, b) => Color32Util.GetG(a).CompareTo(Color32Util.GetG(b)));
}
else
{
_colors.Sort((a, b) => Color32Util.GetB(a).CompareTo(Color32Util.GetB(b)));
}
}