private void BTNStartEnter_Click(object sender, RoutedEventArgs e)
{
Shell.Instance.Clear();
pol = new ShellExt.Polygon();
BTNStroke.IsEnabled = false;
BTNFillEO.IsEnabled = false;
BTNFillNZW.IsEnabled = false;
isEntering = true;
TBPointsCount.Text = "PointsCount - 0";
TBType.Text = "";
}
/// <summary>
/// нарисовать линию
/// </summary>
/// <param name="w">толщина</param>
/// <param name="color">цвет</param>
/// <param name="type">тип законцовки</param>
public static void DrawLine(this Shell shell, int x1, int y1, int x2, int y2, int w, Color color,
LineCap type = LineCap.FLAP)
{
int x1old = x1, x2old = x2, y1old = y1, y2old = y2;
if (w < 3)
{
shell.DrawLine(x1, y1, x2, y2, color);
return;
}
double alpha = Math.Atan(((double)(x2 - x1)) / ((double)(y2 - y1)));
if (y1 <= y2)
{
Utils.Swap(ref x1, ref x2);
Utils.Swap(ref y1, ref y2);
}
if (type == LineCap.SQUARE)
{
x1 += (int)(w * Math.Sin(alpha) / 2);
y1 += (int)(w * Math.Cos(alpha) / 2);
x2 -= (int)(w * Math.Sin(alpha) / 2);
y2 -= (int)(w * Math.Cos(alpha) / 2);
}
Polygon pol = new Polygon();
double dx = w * Math.Cos(alpha) / 2;
double dy = w * Math.Sin(alpha) / 2;
// pol.AddPoint(x1 - (int)dx, y1 + (int)dy);
if (type == LineCap.ROUND)
{
int n = w / 2;
if (n < 5)
{
n = 5;
}
double al = alpha;
for (int i = 0; i < n; i++)
{
al += Math.PI / n;
pol.AddPoint(x1 - (int)(w * Math.Cos(al) / 2), y1 + (int)(w * Math.Sin(al) / 2));
}
for (int i = 0; i < n; i++)
{
pol.AddPoint(x2 - (int)(w * Math.Cos(al) / 2), y2 + (int)(w * Math.Sin(al) / 2));
al += Math.PI / n;
}
}
else
{
pol.AddPoint(x1 - (int)dx, y1 + (int)dy);
pol.AddPoint(x1 + (int)dx, y1 - (int)dy);
pol.AddPoint(x2 + (int)dx, y2 - (int)dy);
pol.AddPoint(x2 - (int)dx, y2 + (int)dy);
}
shell.FillPolygon(pol, color);
//shell.DrawLine(x1old, y1old, x2old, y2old, Colors.Red);
}