private void Normalize(LinearRing ring, bool clockwise)
{
if (ring.IsEmpty)
{
return;
}
CoordinateCollection uniqueCoordinates = new CoordinateCollection();
for (int i = 0; i < ring.NumPoints - 1; i++)
{
uniqueCoordinates.Add(ring.GetCoordinate(i)); // copy all but last one into uniquecoordinates
}
Coordinate minCoordinate = CoordinateCollection.MinimumCoordinate(ring.Coordinates);
uniqueCoordinates.Scroll(minCoordinate);
ICoordinateList ringCoordinates = ring.Coordinates;
ringCoordinates.Clear();
ringCoordinates.AddRange(uniqueCoordinates);
ringCoordinates.Add(uniqueCoordinates[0].Clone()); // add back in the closing point.
if (CGAlgorithms.IsCCW(ringCoordinates) == clockwise)
{
ringCoordinates.Reverse();
}
}
/// <summary>
/// Creates a <see cref="LineString"/> whose coordinates are in the
/// reverse order of this objects.
/// </summary>
/// <returns>
/// A <see cref="LineString"/> with coordinates in the reverse order.
/// </returns>
public virtual LineString ReverseAll()
{
ICoordinateList seq = points.Clone();
seq.Reverse();
LineString revLine = this.Factory.CreateLineString(seq);
return(revLine);
}
