public partial class Form2 : Form
{
private const int MaxLevel = 3;
public Form2()
{
InitializeComponent();
SetStyle(ControlStyles.ResizeRedraw, true);
//DrawTriangle(this.pictureBox1.CreateGraphics());
}
private void DrawTriangle(Graphics g)
{
Point pt1 = new Point(this.ClientRectangle.Width / 2, 10);
int h = this.ClientRectangle.Height - 20;
Point pt2 = pt1;
Point pt3 = pt1;
pt2.Offset((int)(-h * Math.Cos(Math.PI / 6.0) / 2), h);
pt3.Offset((int)(h * Math.Cos(Math.PI / 6.0) / 2), h);
g.FillPolygon(Brushes.Black , new Point[] { pt1, pt2, pt3});
Triangle(g, pt1, pt2, pt3, 1);
}
private void Triangle(Graphics g, Point p1, Point p2, Point p3, int level)
{
Point c1 = new Point(Math.Abs(p3.X + p2.X) / 2, Math.Abs(p3.Y + p2.Y) / 2);
Point c2 = new Point(Math.Abs(p3.X + p1.X) / 2, Math.Abs(p3.Y + p1.Y) / 2);
Point c3 = new Point(Math.Abs(p2.X + p1.X) / 2, Math.Abs(p2.Y + p1.Y) / 2);
g.FillPolygon(Brushes.White, new Point[] { c1, c2, c3 });
if (level < MaxLevel)
{
Triangle(g, p1, c3, c2, level + 1);
Triangle(g, c3, p2, c1, level + 1);
Triangle(g, c2, c1, p3, level + 1);
}
}
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
DrawTriangle(e.Graphics);
} |
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