绘制五角星
全局变量
- 静态存储变量
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2Graphics g;
Pen pen = new Pen(Color.Red);
相关事件
窗体加载
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4private void Form1_Load(object sender, EventArgs e)
{
g = pictureBox1.CreateGraphics();
}pictureBox点击事件
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22private void pictureBox1_MouseDown_1(object sender, MouseEventArgs e)
{
double delta = 36*Math.PI/180;
double r1 = 20;
double r2 = 0.381966 * r1;
Point[] endPoints = new Point[10];
for (int i = 0; i < 10; ++i)
{
if (1 == i % 2)
{
endPoints[i].X = Convert.ToInt16(r1 * Math.Cos(i * delta) + e.X);
endPoints[i].Y = Convert.ToInt16(r1 * Math.Sin(i * delta) + e.Y);
}
else
{
endPoints[i].X = Convert.ToInt16(r2 * Math.Cos(i * delta) + e.X);
endPoints[i].Y = Convert.ToInt16(r2 * Math.Sin(i * delta) + e.Y);
}
}
g.DrawPolygon(pen, endPoints);
}
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