// Procedure Reverse; Overload; Override;
// procedure Reverse(const StartIdx, EndIdx : Integer); Overload; Override;
// LocateEntityAtStation takes a station value and locates the element
// within which the station value lies.
public void LocateEntityAtStation(double Stn, out NFFStationedLineworkEntity Element)
{
Element = null;
for (int I = 0; I < Entities.Count; I++)
{
double Eps1;
if (I == 0)
{
Eps1 = 1E-4;
}
else if (Entities[I - 1].EndStation < Entities[I].StartStation)
{
Eps1 = 1E-4;
}
else
{
Eps1 = 0;
}
double Eps2;
if (I == Entities.Count - 1)
{
Eps2 = 1E-4;
}
else if (Entities[I + 1].StartStation > Entities[I].EndStation)
{
Eps2 = 1E-4;
}
else
{
Eps2 = 0;
}
if (Range.InRange(Stn, Entities[I].StartStation - Eps1, Entities[I].EndStation + Eps2))
{
Element = Entities[I];
}
}
}
public void ComputeStnOfs(double X, double Y, out double Stn, out double Ofs, ref NFFStationedLineworkEntity Element)
{
double TestStn, TestOfs;
Stn = Consts.NullDouble;
Ofs = Consts.NullDouble;
// Check the given element to see if it matches. If so then return the answer
if (Element != null)
{
Element.ComputeStnOfs(X, Y, out TestStn, out TestOfs);
if (TestStn != Consts.NullDouble && TestOfs != Consts.NullDouble)
{
Ofs = TestOfs;
Stn = TestStn;
return;
}
}
Element = null;
for (int I = 0; I < Entities.Count; I++)
{
Entities[I].ComputeStnOfs(X, Y, out TestStn, out TestOfs);
if (TestStn != Consts.NullDouble && TestOfs != Consts.NullDouble &&
(Ofs == Consts.NullDouble || Math.Abs(TestOfs) < Math.Abs(Ofs)))
{
Ofs = TestOfs;
Stn = TestStn;
Element = Entities[I];
}
}
}
// ComputeStnOfs takes a plan position and finds the closest element in the
// alignment for which the plan position converts to a valid station and offset
// coordinate. The station and offset value for that station with respect to
// that element is then returned to the caller.
public override void ComputeStnOfs(double X, double Y, out double Stn, out double Ofs)
{
NFFStationedLineworkEntity element = null;
ComputeStnOfs(X, Y, out Stn, out Ofs, ref element);
}
