static public Screw CreateScrew(double x, double y, int size, bool pixels)
{
int top, left;
if (pixels)
{
top = (int)Math.Round(y - 4);
left = (int)Math.Round(x - 4);
}
else
{
top = (int)(y * form.pxPrLine) + form.padding_top + 4;
left = (int)((x * form.pxPrChar) + form.padding_left) - 1;
}
Screw screw = new Screw();
screw.Location = new Point(left, top);
screw.Size = new Size(size + 8, size + 8);
screw.angle = Helper.random() * 180;
form.Controls.Add(screw);
return(screw);
}