How to draw triangle wave using ZedGraph?

Question

How to draw triangle wave (symmetrical) using ZedGraph?

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

Preferably with option to adjust period and amplitude.

//Edit: the function has to be [related/based on]? x (x-axis).

Something like this:

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();