protected void Draw4Arrows(Graphics g, NPoint p, float length)
{
/* ^
* <-|->
* v
*/
DrawArrow(g, p, p.Clone().Add(0, -length), Brushes.YellowGreen, Pens.Red, length);
DrawArrow(g, p, p.Clone().Add(0, length), Brushes.YellowGreen, Pens.Red, length);
DrawArrow(g, p, p.Clone().Add(-length, 0), Brushes.YellowGreen, Pens.Red, length);
DrawArrow(g, p, p.Clone().Add(length, 0), Brushes.YellowGreen, Pens.Red, length);
}
protected void DrawVertex(Graphics graphics, NPoint point)
{
if (point != null)
{
NPoint s = point.Clone().Add(-NConfig.BLOCK_SIZE, -NConfig.BLOCK_SIZE);
graphics.FillRectangle(Brushes.CornflowerBlue, s.X, s.Y, NConfig.BLOCK_SIZE_2, NConfig.BLOCK_SIZE_2);
graphics.DrawRectangle(Pens.Red, s.X, s.Y, NConfig.BLOCK_SIZE_2, NConfig.BLOCK_SIZE_2);
}
}
internal static double Distance(NPoint startPoint, NPoint endPoint)
{
NPoint p = endPoint.Clone().Subtract(startPoint);
return(Math.Sqrt(p.Y * p.Y + p.X * p.X));
}
