GEOS
3.4.2
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Models an OGC SFS LinearRing
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More...
#include <LinearRing.h>
Public Member Functions | |
LinearRing (const LinearRing &lr) | |
LinearRing (CoordinateSequence *points, const GeometryFactory *newFactory) | |
Constructs a LinearRing with the given points. More... | |
LinearRing (CoordinateSequence::AutoPtr points, const GeometryFactory *newFactory) | |
Hopefully cleaner version of the above. | |
virtual Geometry * | clone () const |
int | getBoundaryDimension () const |
Returns Dimension.FALSE , since by definition LinearRings do not have a boundary. More... | |
bool | isSimple () const |
Returns true , since by definition LinearRings are always simple. More... | |
bool | isClosed () const |
std::string | getGeometryType () const |
Return a string representation of this Geometry type. | |
virtual GeometryTypeId | getGeometryTypeId () const |
Return an integer representation of this Geometry type. | |
void | setPoints (CoordinateSequence *cl) |
Geometry * | reverse () const |
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virtual CoordinateSequence * | getCoordinates () const |
Returns this Geometry vertices. Caller takes ownership of the returned object. | |
const CoordinateSequence * | getCoordinatesRO () const |
Returns a read-only pointer to internal CoordinateSequence. | |
virtual const Coordinate & | getCoordinateN (int n) const |
virtual Dimension::DimensionType | getDimension () const |
Returns line dimension (1) | |
virtual int | getCoordinateDimension () const |
Returns coordinate dimension. | |
virtual Geometry * | getBoundary () const |
Returns a MultiPoint. Empty for closed LineString, a Point for each vertex otherwise. | |
virtual bool | isEmpty () const |
Returns whether or not the set of points in this Geometry is empty. | |
virtual std::size_t | getNumPoints () const |
Returns the count of this Geometrys vertices. | |
virtual Point * | getPointN (std::size_t n) const |
virtual Point * | getStartPoint () const |
Return the start point of the LineString or NULL if this is an EMPTY LineString. | |
virtual Point * | getEndPoint () const |
Return the end point of the LineString or NULL if this is an EMPTY LineString. | |
virtual bool | isRing () const |
virtual bool | isCoordinate (Coordinate &pt) const |
virtual bool | equalsExact (const Geometry *other, double tolerance=0) const |
Returns true if the two Geometrys are exactly equal, up to a specified tolerance. | |
virtual void | apply_rw (const CoordinateFilter *filter) |
virtual void | apply_ro (CoordinateFilter *filter) const |
virtual void | apply_rw (GeometryFilter *filter) |
virtual void | apply_ro (GeometryFilter *filter) const |
virtual void | apply_rw (GeometryComponentFilter *filter) |
virtual void | apply_ro (GeometryComponentFilter *filter) const |
void | apply_rw (CoordinateSequenceFilter &filter) |
void | apply_ro (CoordinateSequenceFilter &filter) const |
virtual void | normalize () |
Normalizes a LineString. More... | |
virtual int | compareToSameClass (const Geometry *ls) const |
virtual const Coordinate * | getCoordinate () const |
Returns a vertex of this Geometry, or NULL if this is the empty geometry. | |
virtual double | getLength () const |
Returns the length of this Geometry. | |
Geometry * | reverse () const |
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virtual | ~Geometry () |
Destroy Geometry and all components. | |
const GeometryFactory * | getFactory () const |
Gets the factory which contains the context in which this geometry was created. More... | |
void | setUserData (void *newUserData) |
A simple scheme for applications to add their own custom data to a Geometry. An example use might be to add an object representing a Coordinate Reference System. More... | |
void * | getUserData () |
Gets the user data object for this geometry, if any. More... | |
virtual int | getSRID () const |
virtual void | setSRID (int newSRID) |
const PrecisionModel * | getPrecisionModel () const |
Get the PrecisionModel used to create this Geometry. | |
virtual std::size_t | getNumGeometries () const |
virtual const Geometry * | getGeometryN (std::size_t) const |
virtual bool | isValid () const |
Tests the validity of this Geometry . More... | |
virtual bool | isRectangle () const |
Polygon overrides to check for actual rectangle. | |
virtual Geometry * | getEnvelope () const |
Returns this Geometrys bounding box. | |
virtual const Envelope * | getEnvelopeInternal () const |
Returns the minimum and maximum x and y values in this Geometry, or a null Envelope if this Geometry is empty. | |
virtual bool | disjoint (const Geometry *other) const |
virtual bool | touches (const Geometry *other) const |
Returns true if the DE-9IM intersection matrix for the two Geometrys is FT*******, F**T***** or F***T****. | |
virtual bool | intersects (const Geometry *g) const |
Returns true if disjoint returns false. | |
virtual bool | crosses (const Geometry *g) const |
virtual bool | within (const Geometry *g) const |
Returns true if the DE-9IM intersection matrix for the two Geometrys is T*F**F***. | |
virtual bool | contains (const Geometry *g) const |
Returns true if other.within(this) returns true. | |
virtual bool | overlaps (const Geometry *g) const |
Returns true if the DE-9IM intersection matrix for the two Geometrys is T*T***T** (for two points or two surfaces) 1*T***T** (for two curves). | |
virtual bool | relate (const Geometry *g, const std::string &intersectionPattern) const |
Returns true if the elements in the DE-9IM intersection matrix for the two Geometrys match the elements in intersectionPattern. More... | |
bool | relate (const Geometry &g, const std::string &intersectionPattern) const |
virtual IntersectionMatrix * | relate (const Geometry *g) const |
Returns the DE-9IM intersection matrix for the two Geometrys. | |
IntersectionMatrix * | relate (const Geometry &g) const |
virtual bool | equals (const Geometry *g) const |
Returns true if the DE-9IM intersection matrix for the two Geometrys is T*F**FFF*. | |
bool | covers (const Geometry *g) const |
Returns true if this geometry covers the specified geometry. More... | |
bool | coveredBy (const Geometry *g) const |
Tests whether this geometry is covered by the specified geometry. More... | |
virtual std::string | toString () const |
Returns the Well-known Text representation of this Geometry. | |
virtual std::string | toText () const |
virtual Geometry * | buffer (double distance) const |
Returns a buffer region around this Geometry having the given width. More... | |
virtual Geometry * | buffer (double distance, int quadrantSegments) const |
Returns a buffer region around this Geometry having the given width and with a specified number of segments used to approximate curves. More... | |
virtual Geometry * | buffer (double distance, int quadrantSegments, int endCapStyle) const |
Computes a buffer area around this geometry having the given width and with a specified accuracy of approximation for circular arcs, and using a specified end cap style. More... | |
virtual Geometry * | convexHull () const |
Returns the smallest convex Polygon that contains all the points in the Geometry. | |
virtual Geometry * | intersection (const Geometry *other) const |
Returns a Geometry representing the points shared by this Geometry and other. More... | |
Geometry * | Union (const Geometry *other) const |
Returns a Geometry representing all the points in this Geometry and other. More... | |
AutoPtr | Union () const |
virtual Geometry * | difference (const Geometry *other) const |
Returns a Geometry representing the points making up this Geometry that do not make up other. More... | |
virtual Geometry * | symDifference (const Geometry *other) const |
Returns a set combining the points in this Geometry not in other, and the points in other not in this Geometry. More... | |
template<class T > | |
void | applyComponentFilter (T &f) const |
Apply a fiter to each component of this geometry. The filter is expected to provide a .filter(const Geometry*) method. More... | |
virtual int | compareTo (const Geometry *geom) const |
virtual double | distance (const Geometry *g) const |
Returns the minimum distance between this Geometry and the Geometry g. | |
virtual double | getArea () const |
Returns the area of this Geometry. | |
virtual bool | isWithinDistance (const Geometry *geom, double cDistance) const |
Tests whether the distance from this Geometry to another is less than or equal to a specified value. More... | |
virtual Point * | getCentroid () const |
Computes the centroid of this Geometry . More... | |
virtual bool | getCentroid (Coordinate &ret) const |
Computes the centroid of this Geometry as a Coordinate. More... | |
virtual Point * | getInteriorPoint () const |
Computes an interior point of this Geometry . More... | |
virtual void | geometryChanged () |
void | geometryChangedAction () |
Notifies this Geometry that its Coordinates have been changed by an external party. | |
Static Public Attributes | |
static const unsigned int | MINIMUM_VALID_SIZE = 4 |
Additional Inherited Members | |
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typedef std::vector< const LineString * > | ConstVect |
A vector of const LineString pointers. | |
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typedef std::vector< const Geometry * > | ConstVect |
A vector of const Geometry pointers. | |
typedef std::vector< Geometry * > | NonConstVect |
A vector of non-const Geometry pointers. | |
typedef std::auto_ptr< Geometry > | AutoPtr |
An auto_ptr of Geometry. | |
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LineString (const LineString &ls) | |
LineString (CoordinateSequence *pts, const GeometryFactory *newFactory) | |
Constructs a LineString taking ownership the given CoordinateSequence. | |
LineString (CoordinateSequence::AutoPtr pts, const GeometryFactory *newFactory) | |
Hopefully cleaner version of the above. | |
Envelope::AutoPtr | computeEnvelopeInternal () const |
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virtual bool | isEquivalentClass (const Geometry *other) const |
Returns whether the two Geometrys are equal, from the point of view of the equalsExact method. | |
int | compare (std::vector< Coordinate > a, std::vector< Coordinate > b) const |
int | compare (std::vector< Geometry * > a, std::vector< Geometry * > b) const |
bool | equal (const Coordinate &a, const Coordinate &b, double tolerance) const |
Geometry (const Geometry &geom) | |
Polygon overrides to check for actual rectangle. More... | |
Geometry (const GeometryFactory *factory) | |
Construct a geometry with the given GeometryFactory. More... | |
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static bool | hasNonEmptyElements (const std::vector< Geometry * > *geometries) |
Returns true if the array contains any non-empty Geometrys. | |
static bool | hasNullElements (const CoordinateSequence *list) |
Returns true if the CoordinateSequence contains any null elements. | |
static bool | hasNullElements (const std::vector< Geometry * > *lrs) |
Returns true if the vector contains any null elements. | |
static void | checkNotGeometryCollection (const Geometry *g) |
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CoordinateSequence::AutoPtr | points |
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std::auto_ptr< Envelope > | envelope |
The bounding box of this Geometry. | |
int | SRID |
Models an OGC SFS LinearRing
.
A LinearRing is a LineString which is both closed and simple. In other words, the first and last coordinate in the ring must be equal, and the interior of the ring must not self-intersect. Either orientation of the ring is allowed.
A ring must have either 0 or 4 or more points. The first and last points must be equal (in 2D). If these conditions are not met, the constructors throw an IllegalArgumentException
geos::geom::LinearRing::LinearRing | ( | CoordinateSequence * | points, |
const GeometryFactory * | newFactory | ||
) |
Constructs a LinearRing
with the given points.
points | points forming a closed and simple linestring, or null or an empty array to create the empty geometry. This array must not contain null elements. If not null LinearRing will take ownership of points. |
newFactory | the GeometryFactory used to create this geometry |
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inlinevirtual |
Creates and returns a full copy of this LineString object. (including all coordinates contained by it).
Reimplemented from geos::geom::LineString.
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virtual |
Returns Dimension.FALSE
, since by definition LinearRings do not have a boundary.
Reimplemented from geos::geom::LineString.
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virtual |
Returns true
, since by definition LinearRings are always simple.
true
Reimplemented from geos::geom::Geometry.
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static |
The minimum number of vertices allowed in a valid non-empty ring (= 4). Empty rings with 0 vertices are also valid.