void EmptyPlot()
{
// using LockBitmap for faster SetPixel and faster GetPixel
// allows working with class Parallel, making it super fast
var bmp = new LockBitmap(Plot);
bmp.LockBits();
Parallel.For(0, Width, x =>
{
Parallel.For(0, Height, y =>
{
bmp.SetPixel(x, y, Background);
});
});
bmp.UnlockBits();
}
void DrawPoints(IEnumerable<double> xs, IEnumerable<double> ys, Color c)
{
var xValues = xs.ToArray();
var yValues = ys.ToArray();
var bmp = new LockBitmap(Plot);
bmp.LockBits();
// for each point within the plot-box, draw the point
Parallel.For(0, xValues.Length, i => {
var x = xValues[i];
var y = yValues[i];
if (y > 0 && y < Height)
bmp.SetPixel((int)x, (int)y, c);
});
bmp.UnlockBits();
}