public static double GetDistance(IVectorPoint a, IVectorPoint b, Distance.GetDistance measure = null)
{
if (a is DoubleVectorPoint && b is DoubleVectorPoint)
{
return(measure(((DoubleVectorPoint)a).Vector, ((DoubleVectorPoint)b).Vector));
}
else if (a is StringVectorPoint && b is StringVectorPoint)
{
return(Distance.Levenshtein(((StringVectorPoint)a).Vector, ((StringVectorPoint)b).Vector));
}
else
{
throw new ArrayTypeMismatchException(string.Format("Cannot calculate distance between type {0} and type {1}", a.GetType(), b.GetType()));
}
}
public static Bitmap Generate(int numberOfPoints, Size size, Distance.GetDistance distance)
{
Random rnd = new Random(19761016);
#region Generate Voronoi diagrams randomly
var points = CellUtilities.CreatePoints(rnd, numberOfPoints, size);
var colors = CellUtilities.CreateCellColorMap(rnd, numberOfPoints);
var bitmap = new Bitmap(size.Width, size.Height);
bitmap.Fill(Color.White);
CellUtilities.SetCellCenters(bitmap, points);
CellUtilities.CreateCell(bitmap, points, colors, distance);
CellUtilities.SetCellCenters(bitmap, points);
#endregion
return(bitmap);
}
public static double DistanceFrom(this IVectorPoint a, IVectorPoint b, Distance.GetDistance measrue = null)
{
return(GetDistance(a, b, measrue));
}
public static void CreateCell(Bitmap bitmap, List <Point> points, List <Color> colors, Distance.GetDistance distance)
{
for (int hh = 0; hh < bitmap.Height; hh++)
{
for (int ww = 0; ww < bitmap.Width; ww++)
{
int ind = -1;
double dist = int.MaxValue;
for (int it = 0; it < points.Count; it++)
{
var p = points[it];
var d = distance(p, new Point(ww, hh));
if (d < dist)
{
dist = d;
ind = it;
}
}
if (ind > 0)
{
bitmap.SetPixel(ww, hh, colors[ind]);
}
}
}
}
