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OGRMultiCurve Class Reference

A collection of OGRCurve. More...

`#include <ogr_geometry.h>`

Inheritance diagram for OGRMultiCurve:

## Public Member Functions
| OGRMultiCurve ()
| Create an empty multi curve collection.
| OGRMultiCurve (const OGRMultiCurve &other)
| Copy constructor. More...
OGRMultiCurve & | operator= (const OGRMultiCurve &other)
| Assignment operator. More...
virtual const char * | getGeometryName () const CPL_OVERRIDE
| Fetch WKT name for geometry type. More...
virtual OGRwkbGeometryType | getGeometryType () const CPL_OVERRIDE
| Fetch geometry type. More...
virtual OGRErr | importFromWkt (char **) CPL_OVERRIDE
| Assign geometry from well known text data. More...
virtual OGRErr | exportToWkt (char **, OGRwkbVariant=wkbVariantOldOgc) const CPL_OVERRIDE
| Convert a geometry into well known text format. More...
virtual int | getDimension () const CPL_OVERRIDE
| Get the dimension of this object. More...
virtual OGRBoolean | hasCurveGeometry (int bLookForNonLinear=FALSE) const CPL_OVERRIDE
| Returns if this geometry is or has curve geometry. More...
Public Member Functions inherited from OGRGeometryCollection
| OGRGeometryCollection ()
| Create an empty geometry collection.
| OGRGeometryCollection (const OGRGeometryCollection &other)
| Copy constructor. More...
OGRGeometryCollection & | operator= (const OGRGeometryCollection &other)
| Assignment operator. More...
virtual OGRGeometry * | clone () const CPL_OVERRIDE
| Make a copy of this object. More...
virtual void | empty () CPL_OVERRIDE
| Clear geometry information. More...
virtual OGRErr | transform (OGRCoordinateTransformation *poCT) CPL_OVERRIDE
| Apply arbitrary coordinate transformation to geometry. More...
virtual void | flattenTo2D () CPL_OVERRIDE
| Convert geometry to strictly 2D. More...
virtual OGRBoolean | IsEmpty () const CPL_OVERRIDE
| Returns TRUE (non-zero) if the object has no points. More...
virtual void | segmentize (double dfMaxLength) CPL_OVERRIDE
| Modify the geometry such it has no segment longer then the given distance. More...
virtual OGRGeometry * | getCurveGeometry (const char *const *papszOptions=NULL) const CPL_OVERRIDE
| Return curve version of this geometry. More...
virtual OGRGeometry * | getLinearGeometry (double dfMaxAngleStepSizeDegrees=0, const char *const *papszOptions=NULL) const CPL_OVERRIDE
| Return, possibly approximate, non-curve version of this geometry. More...
virtual int | WkbSize () const CPL_OVERRIDE
| Returns size of related binary representation. More...
virtual OGRErr | importFromWkb (unsigned char *, int=-1, OGRwkbVariant=wkbVariantOldOgc) CPL_OVERRIDE
| Assign geometry from well known binary data. More...
virtual OGRErr | exportToWkb (OGRwkbByteOrder, unsigned char *, OGRwkbVariant=wkbVariantOldOgc) const CPL_OVERRIDE
| Convert a geometry into well known binary format. More...
virtual double | get_Length () const
| Compute the length of a multicurve. More...
virtual double | get_Area () const
| Compute area of geometry collection. More...
virtual void | getEnvelope (OGREnvelope *psEnvelope) const CPL_OVERRIDE
| Computes and returns the bounding envelope for this geometry in the passed psEnvelope structure. More...
virtual void | getEnvelope (OGREnvelope3D *psEnvelope) const CPL_OVERRIDE
| Computes and returns the bounding envelope (3D) for this geometry in the passed psEnvelope structure. More...
int | getNumGeometries () const
| Fetch number of geometries in container. More...
OGRGeometry * | getGeometryRef (int)
| Fetch geometry from container. More...
const OGRGeometry * | getGeometryRef (int) const
| Fetch geometry from container. More...
virtual OGRBoolean | Equals (OGRGeometry *) const CPL_OVERRIDE
| Returns TRUE if two geometries are equivalent. More...
virtual void | setCoordinateDimension (int nDimension) CPL_OVERRIDE
| Set the coordinate dimension. More...
virtual void | set3D (OGRBoolean bIs3D) CPL_OVERRIDE
| Add or remove the Z coordinate dimension. More...
virtual void | setMeasured (OGRBoolean bIsMeasured) CPL_OVERRIDE
| Add or remove the M coordinate dimension. More...
virtual OGRErr | addGeometry (const OGRGeometry *)
| Add a geometry to the container. More...
virtual OGRErr | addGeometryDirectly (OGRGeometry *)
| Add a geometry directly to the container. More...
virtual OGRErr | removeGeometry (int iIndex, int bDelete=TRUE)
| Remove a geometry from the container. More...
void | closeRings () CPL_OVERRIDE
| Force rings to be closed. More...
virtual void | swapXY () CPL_OVERRIDE
| Swap x and y coordinates. More...
Public Member Functions inherited from OGRGeometry
| OGRGeometry (const OGRGeometry &other)
| Copy constructor. More...
OGRGeometry & | operator= (const OGRGeometry &other)
| Assignment operator. More...
virtual int | getCoordinateDimension () const
| Get the dimension of the coordinates in this object. More...
int | CoordinateDimension () const
| Get the dimension of the coordinates in this object. More...
virtual OGRBoolean | IsValid () const
| Test if the geometry is valid. More...
virtual OGRBoolean | IsSimple () const
| Test if the geometry is simple. More...
OGRBoolean | Is3D () const
OGRBoolean | IsMeasured () const
virtual OGRBoolean | IsRing () const
| Test if the geometry is a ring. More...
OGRwkbGeometryType | getIsoGeometryType () const
| Get the geometry type that conforms with ISO SQL/MM Part3. More...
virtual void | dumpReadable (FILE *, const char *=NULL, char **papszOptions=NULL) const
| Dump geometry in well known text format to indicated output file. More...
virtual char * | exportToGML (const char *const *papszOptions=NULL) const
| Convert a geometry into GML format. More...
virtual char * | exportToKML () const
| Convert a geometry into KML format. More...
virtual char * | exportToJson () const
| Convert a geometry into GeoJSON format. More...
virtual GEOSGeom | exportToGEOS (GEOSContextHandle_t hGEOSCtxt) const CPL_WARN_UNUSED_RESULT
| Returns a GEOSGeom object corresponding to the geometry. More...
void | assignSpatialReference (OGRSpatialReference *poSR)
| Assign spatial reference to this object. More...
OGRSpatialReference * | getSpatialReference (void) const
| Returns spatial reference system for object. More...
OGRErr | transformTo (OGRSpatialReference *poSR)
| Transform geometry to new spatial reference system. More...
virtual OGRBoolean | Intersects (const OGRGeometry *) const
| Do these features intersect? More...
virtual OGRBoolean | Disjoint (const OGRGeometry *) const
| Test for disjointness. More...
virtual OGRBoolean | Touches (const OGRGeometry *) const
| Test for touching. More...
virtual OGRBoolean | Crosses (const OGRGeometry *) const
| Test for crossing. More...
virtual OGRBoolean | Within (const OGRGeometry *) const
| Test for containment. More...
virtual OGRBoolean | Contains (const OGRGeometry *) const
| Test for containment. More...
virtual OGRBoolean | Overlaps (const OGRGeometry *) const
| Test for overlap. More...
virtual OGRGeometry * | Boundary () const CPL_WARN_UNUSED_RESULT
| Compute boundary. More...
virtual double | Distance (const OGRGeometry *) const
| Compute distance between two geometries. More...
virtual OGRGeometry * | ConvexHull () const CPL_WARN_UNUSED_RESULT
| Compute convex hull. More...
virtual OGRGeometry * | Buffer (double dfDist, int nQuadSegs=30) const CPL_WARN_UNUSED_RESULT
| Compute buffer of geometry. More...
virtual OGRGeometry * | Intersection (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT
| Compute intersection. More...
virtual OGRGeometry * | Union (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT
| Compute union. More...
virtual OGRGeometry * | UnionCascaded () const CPL_WARN_UNUSED_RESULT
| Compute union using cascading. More...
virtual OGRGeometry * | Difference (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT
| Compute difference. More...
virtual OGRGeometry * | SymDifference (const OGRGeometry *) const CPL_WARN_UNUSED_RESULT
| Compute symmetric difference. More...
virtual OGRErr | Centroid (OGRPoint *poPoint) const
| Compute the geometry centroid. More...
virtual OGRGeometry * | Simplify (double dTolerance) const CPL_WARN_UNUSED_RESULT
| Simplify the geometry. More...
OGRGeometry * | SimplifyPreserveTopology (double dTolerance) const CPL_WARN_UNUSED_RESULT
| Simplify the geometry while preserving topology. More...
virtual OGRGeometry * | DelaunayTriangulation (double dfTolerance, int bOnlyEdges) const CPL_WARN_UNUSED_RESULT
| Return a Delaunay triangulation of the vertices of the geometry. More...
virtual OGRGeometry * | Polygonize () const CPL_WARN_UNUSED_RESULT
| Polygonizes a set of sparse edges. More...
virtual double | Distance3D (const OGRGeometry *poOtherGeom) const
| Returns the 3D distance between two geometries. More...

## Static Public Member Functions
static OGRMultiLineString * | CastToMultiLineString (OGRMultiCurve *poMC)
| Cast to multi line string. More...
Static Public Member Functions inherited from OGRGeometryCollection
static OGRGeometryCollection * | CastToGeometryCollection (OGRGeometryCollection *poSrc)
| Cast to geometry collection. More...
Static Public Member Functions inherited from OGRGeometry
static GEOSContextHandle_t | createGEOSContext ()
| Create a new GEOS context. More...
static void | freeGEOSContext (GEOSContextHandle_t hGEOSCtxt)
| Destroy a GEOS context. More...

## Protected Member Functions
virtual OGRBoolean | isCompatibleSubType (OGRwkbGeometryType) const CPL_OVERRIDE
| Returns whether a geometry of the specified geometry type can be a member of this collection. More...

## Detailed Description

A collection of OGRCurve.

Since
  GDAL 2.0

## Constructor & Destructor Documentation

OGRMultiCurve::OGRMultiCurve | ( | const OGRMultiCurve & | other | ) |

Copy constructor.

Note: before GDAL 2.1, only the default implementation of the constructor existed, which could be unsafe to use.

Since
  GDAL 2.1

## Member Function Documentation

OGRMultiLineString * OGRMultiCurve::CastToMultiLineString | ( | OGRMultiCurve * | poMC | ) |
| static

Cast to multi line string.

This method should only be called if the multicurve actually only contains instances of OGRLineString. This can be verified if hasCurveGeometry(TRUE) returns FALSE. It is not intended to approximate circular curves. For that use getLinearGeometry().

The passed in geometry is consumed and a new one returned (or NULL in case of failure).

Parameters

  poMC | the input geometry - ownership is passed to the method.

Returns
  new geometry.

OGRErr OGRMultiCurve::exportToWkt | ( | char ** | ppszDstText,
|  | OGRwkbVariant | eWkbVariant = `wkbVariantOldOgc`
| ) |  | const
| virtual

Convert a geometry into well known text format.

This method relates to the SFCOM IWks::ExportToWKT() method.

This method is the same as the C function OGR_G_ExportToWkt().

Parameters

  ppszDstText | a text buffer is allocated by the program, and assigned to the passed pointer. After use, *ppszDstText should be freed with CPLFree().
  eWkbVariant | the specification that must be conformed too : wbkVariantOgc for old-style 99-402 extended dimension (Z) WKB types wbkVariantIso for SFSQL 1.2 and ISO SQL/MM Part 3

Returns
  Currently OGRERR_NONE is always returned.

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

int OGRMultiCurve::getDimension | ( |  | ) | const
| virtual

Get the dimension of this object.

This method corresponds to the SFCOM IGeometry::GetDimension() method. It indicates the dimension of the object, but does not indicate the dimension of the underlying space (as indicated by OGRGeometry::getCoordinateDimension()).

This method is the same as the C function OGR_G_GetDimension().

Returns
  0 for points, 1 for lines and 2 for surfaces.

Reimplemented from OGRGeometryCollection.

const char * OGRMultiCurve::getGeometryName | ( |  | ) | const
| virtual

Fetch WKT name for geometry type.

There is no SFCOM analog to this method.

This method is the same as the C function OGR_G_GetGeometryName().

Returns
  name used for this geometry type in well known text format. The returned pointer is to a static internal string and should not be modified or freed.

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

OGRwkbGeometryType OGRMultiCurve::getGeometryType | ( |  | ) | const
| virtual

Fetch geometry type.

Note that the geometry type may include the 2.5D flag. To get a 2D flattened version of the geometry type apply the wkbFlatten() macro to the return result.

This method is the same as the C function OGR_G_GetGeometryType().

Returns
  the geometry type code.

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

OGRBoolean OGRMultiCurve::hasCurveGeometry | ( | int | bLookForNonLinear = `FALSE` | ) | const
| virtual

Returns if this geometry is or has curve geometry.

Returns if a geometry is, contains or may contain a CIRCULARSTRING, COMPOUNDCURVE, CURVEPOLYGON, MULTICURVE or MULTISURFACE.

If bLookForNonLinear is set to TRUE, it will be actually looked if the geometry or its subgeometries are or contain a non-linear geometry in them. In which case, if the method returns TRUE, it means that getLinearGeometry() would return an approximate version of the geometry. Otherwise, getLinearGeometry() would do a conversion, but with just converting container type, like COMPOUNDCURVE -> LINESTRING, MULTICURVE -> MULTILINESTRING or MULTISURFACE -> MULTIPOLYGON, resulting in a "loss-less" conversion.

This method is the same as the C function OGR_G_HasCurveGeometry().

Parameters

  bLookForNonLinear | set it to TRUE to check if the geometry is or contains a CIRCULARSTRING.

Returns
  TRUE if this geometry is or has curve geometry.

Since
  GDAL 2.0

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

OGRErr OGRMultiCurve::importFromWkt | ( | char ** | ppszInput | ) |
| virtual

Assign geometry from well known text data.

The object must have already been instantiated as the correct derived type of geometry object to match the text type. This method is used by the OGRGeometryFactory class, but not normally called by application code.

This method relates to the SFCOM IWks::ImportFromWKT() method.

This method is the same as the C function OGR_G_ImportFromWkt().

Parameters

  ppszInput | pointer to a pointer to the source text. The pointer is updated to pointer after the consumed text.

Returns
  OGRERR_NONE if all goes well, otherwise any of OGRERR_NOT_ENOUGH_DATA, OGRERR_UNSUPPORTED_GEOMETRY_TYPE, or OGRERR_CORRUPT_DATA may be returned.

Reimplemented from OGRGeometryCollection.

OGRBoolean OGRMultiCurve::isCompatibleSubType | ( | OGRwkbGeometryType | eSubType | ) | const
| protected virtual

Returns whether a geometry of the specified geometry type can be a member of this collection.

Parameters

  eSubType | type of the potential member

Returns
  TRUE or FALSE

Reimplemented from OGRGeometryCollection.

Reimplemented in OGRMultiLineString.

OGRMultiCurve & OGRMultiCurve::operator= | ( | const OGRMultiCurve & | other | ) |

Assignment operator.

Note: before GDAL 2.1, only the default implementation of the operator existed, which could be unsafe to use.

Since
  GDAL 2.1

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

- ogr_geometry.h
- ogrmulticurve.cpp

Generated for GDAL by 1.8.8.