如何使用ZedGraph繪製三角波？

Question

如何使用ZedGraph繪製三角波（對稱）？

alt text http://img101.imageshack.us/img101/8482/okr20troj.jpg

優選地與選項調整週期和幅度。

//編輯：函數必須是[相關/基於]？ x（x軸）。

事情是這樣的：

for (x = 0; x <= 10; x += .005) 
{ 
    if (Math.Sin(x * (2 * Math.PI/period)) >= 0) 
     y = amplitude; 
    else 
     y = -amplitude; 
    originalList.Add(x, y); 
} 

Answer 1

double amplitude = 1.7; 
       double period = 2; 
       PointPairList ppl = new PointPairList(); 
       double y=0; 
       for (double x = 0; x <= 10; x += .005) 
       { 
        double p = (x % (period))/period ; 
        if (p >= 0 && p <= 0.25) 
         y = 4 * p * amplitude; 
        if (p > 0.25 && p < 0.5) 
         y = amplitude - (p - 0.25) * 4 * amplitude; 
        if(p>0.5 && p<=0.75) 
         y = - 4 * (p-0.5) * amplitude; 
        if(p>0.75 && p<=1) 
         y = - (amplitude - (p - 0.75) * 4 * amplitude); 
        ppl.Add(x,y); 
       } 

       var line = zg1.MasterPane[0].AddCurve("", ppl, Color.Blue); 
       line.Symbol.IsVisible = false; 
       zg1.AxisChange(); 
       zg1.Refresh();