# geos::geom::CoordinateArraySequence Class Reference

The default implementation of CoordinateSequence. More...

`#include <CoordinateArraySequence.h>`

Inheritance diagram for geos::geom::CoordinateArraySequence:

List of all members.

## Public Member Functions

| CoordinateArraySequence (const CoordinateArraySequence &cl)
CoordinateSequence * | clone () const
| Returns a deep copy of this collection.
const Coordinate & | getAt (size_t pos) const
| Returns a read-only reference to Coordinate at position i.
virtual void | getAt (size_t i, Coordinate &c) const
| Copy Coordinate at position i to Coordinate c.
size_t | getSize () const
| Returns the number of Coordinates (actual or otherwise, as this implementation may not store its data in Coordinate objects).
const std::vector< Coordinate > * | toVector () const
| Returns a read-only vector with the Coordinates in this collection.
| CoordinateArraySequence ()
| Construct an empty sequence.
| CoordinateArraySequence (std::vector< Coordinate > *coords)
| Construct sequence taking ownership of given Coordinate vector.
| CoordinateArraySequence (size_t n)
| Construct sequence allocating space for n coordinates.
bool | isEmpty () const
| Returns `true` it list contains no coordinates.
void | add (const Coordinate &c)
| Add a Coordinate to the list.
virtual void | add (const Coordinate &c, bool allowRepeated)
| Add a coordinate.
void | setAt (const Coordinate &c, size_t pos)
| Get a reference to Coordinate at position pos.
void | deleteAt (size_t pos)
| Delete Coordinate at position pos (list will shrink).
std::string | toString () const
| Get a string rapresentation of CoordinateSequence.
void | setPoints (const std::vector< Coordinate > &v)
| Substitute Coordinate list with a copy of the given vector.
double | getOrdinate (size_t index, size_t ordinateIndex) const
void | setOrdinate (size_t index, size_t ordinateIndex, double value)
void | expandEnvelope (Envelope &env) const
size_t | getDimension () const
void | apply_rw (const CoordinateFilter *filter)
void | apply_ro (CoordinateFilter *filter) const
virtual CoordinateSequence & | removeRepeatedPoints ()
| Remove consecutive equal Coordinates from the sequence.

## Detailed Description

The default implementation of CoordinateSequence.

## Member Function Documentation

const Coordinate& geos::geom::CoordinateArraySequence::getAt | ( | size_t | i | ) | const`[virtual]`

Returns a read-only reference to Coordinate at position i.

Whether or not the Coordinate returned is the actual underlying Coordinate or merely a copy depends on the implementation.

Implements geos::geom::CoordinateSequence.

const std::vector<Coordinate>* geos::geom::CoordinateArraySequence::toVector | ( |  | ) | const`[virtual]`

Returns a read-only vector with the Coordinates in this collection.

Whether or not the Coordinates returned are the actual underlying Coordinates or merely copies depends on the implementation. Note that if this implementation does not store its data as an array of Coordinates, this method will incur a performance penalty because the array needs to be built from scratch.

This method is a port of the toCoordinateArray() method of JTS. It is not much used as memory management requires us to know wheter we should or not delete the returned object in a consistent way. Our options are: use shared_ptr<Coordinate> or always keep ownerhips of an eventual newly created vector. We opted for the second, so the returned object is a const, to also ensure that returning an internal pointer doesn't make the object mutable.

Implements geos::geom::CoordinateSequence.

virtual void geos::geom::CoordinateArraySequence::add | ( | const Coordinate & | c,
|  | bool | allowRepeated |
| ) |  |  | `[virtual]`

Add a coordinate.

Parameters:

  | c | The coordinate to add
  | allowRepeated | if set to false, repeated coordinates are collapsed

Returns:
  true (as by general collection contract)

Reimplemented from geos::geom::CoordinateSequence.

void geos::geom::CoordinateArraySequence::setAt | ( | const Coordinate & | c,
|  | size_t | pos |
| ) |  |  | `[virtual]`

Get a reference to Coordinate at position pos.

Copy Coordinate c to position pos

Implements geos::geom::CoordinateSequence.

double geos::geom::CoordinateArraySequence::getOrdinate | ( | size_t | index,
|  | size_t | ordinateIndex |
| ) |  |  | const`[virtual]`

Returns the ordinate of a coordinate in this sequence. Ordinate indices 0 and 1 are assumed to be X and Y. Ordinates indices greater than 1 have user-defined semantics (for instance, they may contain other dimensions or measure values).

Parameters:

  | index | the coordinate index in the sequence
  | ordinateIndex | the ordinate index in the coordinate (in range [0, dimension-1])

Implements geos::geom::CoordinateSequence.

void geos::geom::CoordinateArraySequence::setOrdinate | ( | size_t | index,
|  | size_t | ordinateIndex,
|  | double | value |
| ) |  |  | `[virtual]`

Sets the value for a given ordinate of a coordinate in this sequence.

Parameters:

  | index | the coordinate index in the sequence
  | ordinateIndex | the ordinate index in the coordinate (in range [0, dimension-1])
  | value | the new ordinate value

Implements geos::geom::CoordinateSequence.

void geos::geom::CoordinateArraySequence::expandEnvelope | ( | Envelope & | env | ) | const`[virtual]`

Expands the given Envelope to include the coordinates in the sequence. Allows implementing classes to optimize access to coordinate values.

Parameters:

  | env | the envelope to expand

Reimplemented from geos::geom::CoordinateSequence.

size_t geos::geom::CoordinateArraySequence::getDimension | ( |  | ) | const`[inline, virtual]`

Returns the dimension (number of ordinates in each coordinate) for this sequence.

Returns:
  the dimension of the sequence.

Implements geos::geom::CoordinateSequence.

virtual CoordinateSequence& geos::geom::CoordinateArraySequence::removeRepeatedPoints | ( |  | ) | `[virtual]`

Remove consecutive equal Coordinates from the sequence.

Equality test is 2D based. Returns a reference to self.

Implements geos::geom::CoordinateSequence.

The documentation for this class was generated from the following file:

- CoordinateArraySequence.h