public Circle(MyPoint p1, MyPoint p2, MyPoint p3)
{
try
{
double x = (p3.getX() * p3.getX() * (p1.getY() - p2.getY()) + (p1.getX() * p1.getX() + (p1.getY() - p2.getY()) * (p1.getY() - p3.getY()))
* (p2.getY() - p3.getY()) + p2.getX() * p2.getX() * (-p1.getY() + p3.getY()))
/ (2 * (p3.getX() * (p1.getY() - p2.getY()) + p1.getX() * (p2.getY() - p3.getY()) + p2.getX() * (-p1.getY() + p3.getY())));
double y = (p2.getY() + p3.getY()) / 2 - (p3.getX() - p2.getX()) / (p3.getY() - p2.getY()) * (x - (p2.getX() + p3.getX()) / 2);
Center = new MyPoint(x, y);
radius = Center.distance(p1);
}
catch (Exception e)
{
MessageBox.Show("Nu se poate crea cercul cu cele trei puncte: " + e.ToString());
}
}
private void MainDrawingArea_MouseClick(object sender, MouseEventArgs e)
{
g.DrawArc(new Pen(Color.Red), (float)e.X, (float)e.Y, (float)4.0, (float)4.0, (float)0.0, (float)360.0);
p[n++] = new MyPoint(e.X, e.Y);
sec = findSec(n, p, 0, b);
using (System.IO.StreamWriter file = new System.IO.StreamWriter(@"Log.txt", true))
{
file.WriteLine("Num MyMyPoints: {0}", n);
for (int i = 0; i < n; i++)
{
string formatString = String.Format("Center {0} {1} MyPoint {2} {3} Radius: {4} Distance: {5}",
sec.getCenter().getX(), sec.getCenter().getY(), p[i].getX(), p[i].getY(), sec.getRadius(), sec.getCenter().distance(p[i]));
file.WriteLine(formatString);
}
file.WriteLine("");
}
if (n > 1)
{
try
{
MyPoint center = sec.getCenter();
int r = (int)sec.getRadius();
if (prev_height > 0)
{
g.DrawArc(new Pen(Color.White), (float)prev_x, (float)prev_y, (float)prev_width, (float)prev_height, 0, 360);
}
double x = center.getX() - r; prev_x = x;
double y = center.getY() - r; prev_y = y;
double width = 2 * r; prev_width = width;
int height = 2 * r; prev_height = height;
g.DrawArc(new Pen(Color.Blue), (float)x, (float)y, (float)width, (float)height, 0, 360);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
}
public Circle(MyPoint first, MyPoint second)
{
Center = new MyPoint((first.getX() + second.getX()) / 2, (first.getY() + second.getY()) / 2);
radius = Center.distance(first);
}