/// <summary>
/// Gets the aligned scroll value which is the starting point of the entity
/// found at the given distance position.
/// </summary>
/// <param name="point">The point.</param>
/// <returns>The starting point of the entity.</returns>
public double GetAlignedScrollValue(double point)
{
double offset = trackDCC.GetPreviousScrollValue(start);
double d = trackDCC.GetAlignedScrollValue(point + offset);
if (double.IsNaN(d) || d < offset || d - offset > TotalDistance)
{
return(double.NaN);
}
return(d - offset);
}
/// <summary>
/// Gets the aligned scroll value which is the starting point of the entity
/// found at the given distance position.
/// </summary>
/// <param name="point">The point.</param>
/// <returns>The starting point of the entity.</returns>
public double GetAlignedScrollValue(double point)
{
int index = IndexOfCumulatedDistance(point);
double nestedStart = GetCumulatedDistanceAt(index);
double delta = point - nestedStart;
if (delta > 0)
{
IDistanceCounterCollection nestedDcc = GetNestedDistances(index);
if (nestedDcc != null)
{
double r = nestedDcc.GetAlignedScrollValue(delta);
if (!double.IsNaN(r) && r >= 0 && r < nestedDcc.TotalDistance)
{
return(nestedStart + r);
}
}
}
return(GetCumulatedDistanceAt(index));
}
