private MaxPoint Calculate(ClassesData classes)
{
double tempVar = 0;
double maxDistance = 0;
Point numPoint = new Point(1, 1);
foreach (PointData pd in classes.ObjectClass)
{
if (pd == classes.ObjectClass.First())
{
tempVar = Math.Sqrt(Math.Pow(pd.point.X - classes.center.point.X, 2) + Math.Pow(pd.point.Y - classes.center.point.Y, 2));
maxDistance = tempVar;
}
else
{
tempVar = Math.Sqrt(Math.Pow(pd.point.X - classes.center.point.X, 2) + Math.Pow(pd.point.Y - classes.center.point.Y, 2));
if (maxDistance < tempVar)
{
maxDistance = tempVar;
numPoint = pd.point;
}
}
}
MaxPoint mp = new MaxPoint(numPoint, maxDistance);
return(mp);
}
private void ResultButton_Click(object sender, EventArgs e)
{
PaintPanel.Refresh();
classes = new ClassesData[0];
Random r = new Random();
Point p = pointlist.pointcollection[r.Next(0, pointlist.pointcollection.Length)].point;
Array.Resize(ref classes, classes.Length + 1);
classes[classes.Length - 1] = (new ClassesData(p.X, p.Y, Color.Black));
p = pointlist.pointcollection[Calculate(pointlist, classes.First().center.point)].point;
Array.Resize(ref classes, classes.Length + 1);
classes[classes.Length - 1] = (new ClassesData(p.X, p.Y, Color.Black));
for (int i = 0; i < pointlist.pointcollection.Length; i++)
{
int numCluster = Calculate(classes, pointlist.pointcollection[i].point);
pointlist.pointcollection[i].color = colors[numCluster];
classes[numCluster].ObjectClass.Add(pointlist.pointcollection[i]);
}
MaxPoint mp = NewCenter(classes);
while (IsValidCenter(mp))
{
Array.Resize(ref classes, classes.Length + 1);
classes[classes.Length - 1] = (new ClassesData(mp.point.X, mp.point.Y, Color.Black));
for (int i = 0; i < pointlist.pointcollection.Length; i++)
{
int numCluster = Calculate(classes, pointlist.pointcollection[i].point);
pointlist.pointcollection[i].color = colors[numCluster];
classes[numCluster].ObjectClass.Add(pointlist.pointcollection[i]);
}
mp = NewCenter(classes);
}
foreach (PointData pd in pointlist.pointcollection)
{
graph.DrawRectangle(new Pen(pd.color),
pd.point.X, pd.point.Y, 1, 1);
}
for (int i = 0; i < classes.Length; i++)
{
Rectangle rect = new Rectangle(classes[i].center.point.X,
classes[i].center.point.Y, 10, 10);
graph.DrawRectangle(new Pen(classes[i].center.color),
rect);
graph.FillRectangle(Brushes.Black, rect);
}
}
private bool IsValidCenter(MaxPoint NewPoint)
{
double l = 0;
double[] ll = new double[classes.Length];
for (int i = 0; i < classes.Length; i++)
{
for (int j = 0; j < classes.Length - 1; j++)
{
ll[i] += Math.Sqrt(Math.Pow(classes[j].center.point.X - classes[j + 1].center.point.X, 2) +
Math.Pow(classes[j].center.point.Y - classes[j + 1].center.point.Y, 2));
}
l += ll[i];
}
if (NewPoint.length > l / (classes.Length * 2))
{
return(true);
}
return(false);
}
private MaxPoint NewCenter(ClassesData[] classes)
{
MaxPoint[] points = new MaxPoint[classes.Length];
MaxPoint p = new MaxPoint(new Point(0, 0), 0);
for (int i = 0; i < classes.Length; i++)
{
points[i] = Calculate(classes[i]);
}
for (int i = 0; i < points.Length - 1; i++)
{
if (points[i].length > points[i].length)
{
p = points[i];
}
else
{
p = points[i + 1];
}
}
return(p);
}
