c#绘制正弦曲线__简单实现

完善中...
//double distance=200.0;
//double f = 1.0*Math.PI/distance;//1.0和distance参数 设置多长的距离绘制半个波形

//***************************************************************************

private void button1_Click(object sender, EventArgs e)
{
Graphics g = Graphics.FromHwnd(this.Handle);
g.Clear(this.BackColor);
Pen pn = new Pen(Color.Green, 2);
int maxY = this.Height;//获取窗体的高
int maxX = this.Width;//获取窗体的宽

double f = 2.0 * Math.PI / 200.0;
int lmin = 0;
int rmax = 200;//把具体的宽度分成200等份
int count = rmax - lmin;
PointF[] mypoint = new PointF[count + 1];
int x= 0;
for (int i = lmin; i <= rmax; i++)
{
　　　　　　//0.5为半个波形占容器高度的50%
　　　　　　//根据具体的容器高度设置PointF点的Y坐标，（具体情况而定）

double temp = 0.5 * (maxY -maxY * Math.Sin(f * i));
mypoint[x] = new PointF((float)i, (float)temp);
x++;
}
g.DrawCurve(pn, mypoint);
pn.Dispose();
g.Dispose();
}