OGR
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#include <ogr_geometry.h>
Public Member Functions | |
OGRMultiCurve () | |
Create an empty multi curve collection. | |
virtual const char * | getGeometryName () const |
Fetch WKT name for geometry type. More... | |
virtual OGRwkbGeometryType | getGeometryType () const |
Fetch geometry type. More... | |
virtual OGRErr | importFromWkt (char **) |
Assign geometry from well known text data. More... | |
virtual OGRErr | exportToWkt (char **, OGRwkbVariant=wkbVariantOldOgc) const |
Convert a geometry into well known text format. More... | |
virtual int | getDimension () const |
Get the dimension of this object. More... | |
virtual OGRBoolean | hasCurveGeometry (int bLookForNonLinear=FALSE) const |
Returns if this geometry is or has curve geometry. More... | |
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OGRGeometryCollection () | |
Create an empty geometry collection. | |
virtual OGRGeometry * | clone () const |
Make a copy of this object. More... | |
virtual void | empty () |
Clear geometry information. This restores the geometry to it's initial state after construction, and before assignment of actual geometry. More... | |
virtual OGRErr | transform (OGRCoordinateTransformation *poCT) |
Apply arbitrary coordinate transformation to geometry. More... | |
virtual void | flattenTo2D () |
Convert geometry to strictly 2D. In a sense this converts all Z coordinates to 0.0. More... | |
virtual OGRBoolean | IsEmpty () const |
Returns TRUE (non-zero) if the object has no points. More... | |
virtual void | segmentize (double dfMaxLength) |
Modify the geometry such it has no segment longer then the given distance. More... | |
virtual OGRGeometry * | getCurveGeometry (const char *const *papszOptions=NULL) const |
Return curve version of this geometry. More... | |
virtual OGRGeometry * | getLinearGeometry (double dfMaxAngleStepSizeDegrees=0, const char *const *papszOptions=NULL) const |
Return, possibly approximate, non-curve version of this geometry. More... | |
virtual int | WkbSize () const |
Returns size of related binary representation. More... | |
virtual OGRErr | importFromWkb (unsigned char *, int=-1, OGRwkbVariant=wkbVariantOldOgc) |
Assign geometry from well known binary data. More... | |
virtual OGRErr | exportToWkb (OGRwkbByteOrder, unsigned char *, OGRwkbVariant=wkbVariantOldOgc) const |
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 |
Computes and returns the bounding envelope for this geometry in the passed psEnvelope structure. More... | |
virtual void | getEnvelope (OGREnvelope3D *psEnvelope) const |
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... | |
virtual OGRBoolean | Equals (OGRGeometry *) const |
Returns TRUE if two geometries are equivalent. More... | |
virtual void | setCoordinateDimension (int nDimension) |
Set the 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 () |
Force rings to be closed. More... | |
virtual void | swapXY () |
Swap x and y coordinates. More... | |
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virtual int | getCoordinateDimension () 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... | |
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... | |
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 |
Compute boundary. More... | |
virtual double | Distance (const OGRGeometry *) const |
Compute distance between two geometries. More... | |
virtual OGRGeometry * | ConvexHull () const |
Compute convex hull. More... | |
virtual OGRGeometry * | Buffer (double dfDist, int nQuadSegs=30) const |
Compute buffer of geometry. More... | |
virtual OGRGeometry * | Intersection (const OGRGeometry *) const |
Compute intersection. More... | |
virtual OGRGeometry * | Union (const OGRGeometry *) const |
Compute union. More... | |
virtual OGRGeometry * | UnionCascaded () const |
Compute union using cascading. More... | |
virtual OGRGeometry * | Difference (const OGRGeometry *) const |
Compute difference. More... | |
virtual OGRGeometry * | SymDifference (const OGRGeometry *) const |
Compute symmetric difference. More... | |
virtual OGRErr | Centroid (OGRPoint *poPoint) const |
Compute the geometry centroid. More... | |
virtual OGRGeometry * | Simplify (double dTolerance) const |
Simplify the geometry. More... | |
OGRGeometry * | SimplifyPreserveTopology (double dTolerance) const |
Simplify the geometry while preserving topology. More... | |
virtual OGRGeometry * | Polygonize () const |
Polygonizes a set of sparse edges. More... | |
virtual OGRGeometry * | SymmetricDifference (const OGRGeometry *) const CPL_WARN_DEPRECATED("Non standard method. Use SymDifference() instead") |
Compute symmetric difference (deprecated) More... | |
virtual OGRGeometry * | getBoundary () const CPL_WARN_DEPRECATED("Non standard method. Use Boundary() instead") |
Compute boundary (deprecated) More... | |
Static Public Member Functions | |
static OGRMultiLineString * | CastToMultiLineString (OGRMultiCurve *poMC) |
Cast to multi line string. More... | |
A collection of OGRCurve.
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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).
poMS | the input geometry - ownership is passed to the method. |
References OGRCurve::CastToLineString().
Referenced by OGRGeometryFactory::forceToMultiLineString().
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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().
ppszDstText | a text buffer is allocated by the program, and assigned to the passed pointer. After use, *ppszDstText should be freed with OGRFree(). |
eWkbVariant | the specification that must be conformed too :
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Reimplemented from OGRGeometryCollection.
Reimplemented in OGRMultiLineString.
References wkbVariantIso.
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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().
Reimplemented from OGRGeometryCollection.
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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().
Reimplemented from OGRGeometryCollection.
Reimplemented in OGRMultiLineString.
References OGR_GT_IsCurve().
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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().
Reimplemented from OGRGeometryCollection.
Reimplemented in OGRMultiLineString.
References OGRGeometry::getCoordinateDimension(), wkbMultiCurve, and wkbMultiCurveZ.
Referenced by importFromWkt().
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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().
bLookForNonLinear | set it to TRUE to check if the geometry is or contains a CIRCULARSTRING. |
Reimplemented from OGRGeometryCollection.
Reimplemented in OGRMultiLineString.
References OGRGeometryCollection::hasCurveGeometry().
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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().
ppszInput | pointer to a pointer to the source text. The pointer is updated to pointer after the consumed text. |
Reimplemented from OGRGeometryCollection.
References getGeometryType(), wkbFlatten, and wkbMultiCurve.