public Tuple <double, double> Angle_point()
{
double x1 = A.GetPoint().X - B.GetPoint().X, x2 = C.GetPoint().X - B.GetPoint().X;
double y1 = A.GetPoint().Y - B.GetPoint().Y, y2 = C.GetPoint().Y - B.GetPoint().Y;
var d1 = Math.Sqrt(x1 * x1 + y1 * y1);
var d2 = Math.Sqrt(x2 * x2 + y2 * y2);
var anl = Math.Acos((x1 * x2 + y1 * y2) / (d1 * d2)) * 180 / Math.PI;
return(Tuple.Create(anl, (x1 * x2 + y1 * y2) / (d1 * d2)));
}
private IEnumerable <int> FindTouchedList(PointListItem self)
{
var res = new List <int>();
if (self == null)
{
return(res);
}
var nbs = m_OrigItems.OrderBy(x => x.GetDistance(self.GetPoint())).Take(4).ToList();
foreach (var itm in nbs)
{
if (self.IsTouched(itm))
{
res.Add(itm.Id());
}
}
return(res);
}
public bool IsTouched(PointListItem a)
{
return(GetDistance(a.GetPoint()) - (m_Radius + a.GetRadius()) < 5);
}