/// <summary>
/// Evaluates the <see cref="Interval"/> of the <paramref name="ordinate"/>-values in
/// <paramref name="sequence"/> and writes it using the provided <paramref name="writer"/>
/// </summary>
/// <param name="sequence">The sequence</param>
/// <param name="ordinate">The ordinate</param>
/// <param name="writer">The writer</param>
protected void WriteInterval(CoordinateSequence sequence, Ordinate ordinate, BinaryWriter writer)
{
Interval interval;
if (!sequence.TryGetOrdinateIndex(ordinate, out int ordinateIndex))
{
interval = ordinate == Ordinate.M
? Interval.Create(ShapeFileConstants.NoDataValue)
: Interval.Create(double.NaN);
}
else if (ordinate == Ordinate.M)
{
double val = sequence.GetOrdinate(0, ordinateIndex);
if (double.IsNaN(val))
{
val = ShapeFileConstants.NoDataValue;
}
interval = Interval.Create(val);
for (int i = 1, cnt = sequence.Count; i < cnt; i++)
{
val = sequence.GetOrdinate(i, ordinateIndex);
if (double.IsNaN(val))
{
val = ShapeFileConstants.NoDataValue;
}
interval = interval.ExpandedByValue(val);
}
}
else
{
double val = sequence.GetOrdinate(0, ordinateIndex);
interval = Interval.Create(val);
for (int i = 1, cnt = sequence.Count; i < cnt; i++)
{
interval = interval.ExpandedByValue(sequence.GetOrdinate(i, ordinateIndex));
}
}
writer.Write(interval.Min);
writer.Write(interval.Max);
}