public FlagColor[] SelectColors(Culture Culture, FlagColorMap Colors, Random Random, int Iterations = 30)
{
FlagColor[] Chosen = Colors.Closest(Culture, _Parts.Length);
Pair <double, int> P = ColoringScore(Culture, Chosen);
for (int j = 0; j < Iterations; ++j)
{
P = ColoringScore(Culture, Chosen);
int C = Random.NextDouble() > .5 ? P.Second : Random.Next(0, _Parts.Length);
double Score = P.First;
FlagColor Original = Chosen[C];
// Find best new assignment
FlagColor Best = Chosen[C];
for (int i = 0; i < Colors.Colors.Length; ++i)
{
Chosen[C] = Colors.Colors[i];
double thisScore = ColoringScore(Culture, Chosen).First;
if (thisScore > Score)
{
Score = thisScore;
Best = Colors.Colors[i];
}
}
Chosen[C] = Best;
}
return(Chosen);
}
private Pair <double, int> ColoringScore(Culture Culture, FlagColor[] Colors)
{
double Score = 0;
double WorstPartScore = double.MaxValue;
int WorstPart = -1;
for (int i = 0; i < _Parts.Length; ++i)
{
GraphNode <Vector2f[]> part = _Parts[i];
FlagColor Color = Colors[i];
double Distance = 1 - Color.DistanceTo(Culture) / 2.2360679775;
Distance *= Distance * Distance;
double PartScore = Distance;
foreach (var edge in part.Edges)
{
double M = 1 - Color.DistanceTo(Colors[Array.IndexOf(_Parts, edge.Second)]) / 1.73205080757;
M = M * M * M * M;
PartScore -= Distance * M * edge.First;
}
Score += PartScore;
if (PartScore < WorstPartScore)
{
WorstPart = i;
WorstPartScore = PartScore;
}
}
return(new Pair <double, int>(Score, WorstPart));
}
public float DistanceTo(FlagColor Color)
{
float R = (float)(_Color.R - Color.Color.R) / 255;
float G = (float)(_Color.G - Color.Color.G) / 255;
float B = (float)(_Color.B - Color.Color.B) / 255;
return((float)Math.Sqrt(R * R + G * G + B * B));
}
public FlagColor[] Closest(Culture Culture, int Number)
{
float[] Keys = new float[_Colors.Length];
for (int i = 0; i < _Colors.Length; ++i)
{
Keys[i] = _Colors[i].DistanceTo(Culture);
}
Array.Sort(Keys, _Colors);
FlagColor[] R = new FlagColor[Number];
Array.Copy(_Colors, R, Number);
return(R);
}