/// <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 override Geometry Reverse()
{
var seq = _points.Copy();
CoordinateSequences.Reverse(seq);
return(Factory.CreateLineString(seq));
}
/// <summary>
/// Shifts the positions of the coordinates until the coordinate at <code>firstCoordinateIndex</code>
/// is first.
/// </summary>
/// <param name="seq">The coordinate sequence to rearrange</param>
/// <param name="indexOfFirstCoordinate">The index of the coordinate to make first</param>
/// <param name="ensureRing">Makes sure that <paramref name="seq"/> will be a closed ring upon exit</param>
public static void Scroll(CoordinateSequence seq, int indexOfFirstCoordinate, bool ensureRing)
{
int i = indexOfFirstCoordinate;
if (i <= 0)
{
return;
}
// make a copy of the sequence
var copy = seq.Copy();
// test if ring, determine last index
int last = ensureRing ? seq.Count - 1 : seq.Count;
// fill in values
for (int j = 0; j < last; j++)
{
for (int k = 0; k < seq.Dimension; k++)
{
seq.SetOrdinate(j, k, copy.GetOrdinate((indexOfFirstCoordinate + j) % last, k));
}
}
// Fix the ring (first == last)
if (ensureRing)
{
for (int k = 0; k < seq.Dimension; k++)
{
seq.SetOrdinate(last, k, seq.GetOrdinate(0, k));
}
}
}
public override Geometry Reverse()
{
var sequence = CoordinateSequence.Copy();
CoordinateSequences.Reverse(sequence);
return(Factory.CreateLinearRing(sequence));
}
private LinearRing CreateLinearRing(CoordinateSequence coordinates, bool ccw)
{
if (coordinates != null && Orientation.IsCCW(coordinates) != ccw)
{
coordinates = coordinates.Copy();
CoordinateSequences.Reverse(coordinates);
}
return(CreateLinearRing(coordinates));
}
/// <inheritdoc cref="Geometry.CopyInternal"/>>
protected override Geometry CopyInternal()
{
var coordinates = _coordinates.Copy();
return(new Point(coordinates, Factory));
}
public override CoordinateSequence Copy() => new ReversedCoordinateSequence(_inner.Copy());
/// <inheritdoc cref="Geometry.CopyInternal"/>>
protected override Geometry CopyInternal()
{
return(new LinearRing(CoordinateSequence.Copy(), Factory));
}
