using System;
using System.Drawing;
using System.Windows.Forms;
class PolyEllipse: Form
{
public static void Main()
{
Application.Run(new PolyEllipse());
}
public PolyEllipse()
{
Text = "Ellipse with DrawLines";
ResizeRedraw = true;
}
protected override void OnPaint(PaintEventArgs pea)
{
DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
}
protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
{
int iNum = 2 * (cx + cy);
PointF[] aptf = new PointF[iNum];
for (int i = 0; i < iNum; i++)
{
double dAng = i * 2 * Math.PI / (iNum - 1);
aptf[i].X = (cx - 1) / 2f * (1 + (float)Math.Cos(dAng));
aptf[i].Y = (cy - 1) / 2f * (1 + (float)Math.Sin(dAng));
}
grfx.DrawLines(new Pen(clr), aptf);
}
}
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