private void B3_Click(object sender, EventArgs e)
{
Label l31 = FindControl(panel1, "l31") as Label;
Label l32 = FindControl(panel1, "l32") as Label;
Label l33 = FindControl(panel1, "l33") as Label;
Label l34 = FindControl(panel1, "l34") as Label;
Label l35 = FindControl(panel1, "l35") as Label;
int x1;
int y1;
int x2;
int y2;
int.TryParse(l31.Text.Split(' ')[1], out x1);
int.TryParse(l32.Text.Split(' ')[1], out y1);
int.TryParse(l33.Text.Split(' ')[1], out x2);
int.TryParse(l34.Text.Split(' ')[1], out y2);
Figure f2 = new Figure();
f2.Add(new CustomPoint(x1, y1));
f2.Add(new CustomPoint(x2, y2));
var res = Figure.Intersection(f, f2);
l35.Text = "Result: " + (res.x).ToString("F0") + "; " + (res.y).ToString("F0");
Graphics g = Graphics.FromImage(pictureBox1.Image);
Point[] points = new Point[2];
points[0] = new Point(ToPictureBoxX(x1), ToPictureBoxY(y1));
points[1] = new Point(ToPictureBoxX(x2), ToPictureBoxY(y2));
Pen pen = new Pen(Color.Blue);
g.DrawPolygon(pen, points);
pictureBox1.Invalidate();
}
