/// <summary>Draw an arrow on the specified graphics context</summary> /// <param name="context">The graphics context to draw on</param> /// <param name="start">The start point of the arrow</param> /// <param name="end">The end point of the arrow</param> private static void DrawArrow(IDrawContext context, Point start, Point end) { double angle = Math.Atan2(end.Y - start.Y, end.X - start.X) + Math.PI; double arrowLenght = 10; double arrowDegrees = 10; double x1 = start.X + arrowLenght * Math.Cos(angle - arrowDegrees); double y1 = start.Y + arrowLenght * Math.Sin(angle - arrowDegrees); double x2 = start.X + arrowLenght * Math.Cos(angle + arrowDegrees); double y2 = start.Y + arrowLenght * Math.Sin(angle + arrowDegrees); context.NewPath(); context.MoveTo(x1, y1); context.LineTo(x2, y2); context.LineTo(end.X, end.Y); context.LineTo(x1, y1); context.StrokePreserve(); context.Fill(); }