protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
{
PointF[] aptf = new PointF[cx];
for( int i = 0; i < cx; i++ )
{
aptf[i].X = i;
aptf[i].Y = SupCarSignal(.3f, 1f, 1000f, 10000f, i);
//cy / 2 * ( 1 - (float)Math.Sin(i * 2 * Math.PI / ( cx - 1 )) );
}
grfx.DrawLines(new Pen(clr), aptf);
}