public Bitmap GetTrail(int width, int height)
{
if (width > 0 && height > 0)
{
Bitmap bmp = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bmp);
PointF center = new PointF(width / 2f, height / 2f);
var curr = Trail.GetEnumerator();
if (curr.MoveNext())
{
var prev = curr;
while (curr.MoveNext())
{
g.DrawLine(new Pen(colorTrail, 1), curr.Current.X + center.X, curr.Current.Y + center.Y,
prev.Current.X + center.X, prev.Current.Y + center.Y);
prev = curr;
}
}
return(bmp);
}
return(null);
}