Triangle class. More...

#include <ogr_geometry.h>

Inheritance diagram for OGRTriangle:

Public Member Functions
	OGRTriangle ()
	Constructor.

	OGRTriangle (const OGRPoint &p, const OGRPoint &q, const OGRPoint &r)
	Construct a triangle from points. More...

	OGRTriangle (const OGRTriangle &other)
	Copy constructor.

	OGRTriangle (const OGRPolygon &other, OGRErr &eErr)
	Constructs an OGRTriangle from a valid OGRPolygon. More...

OGRTriangle &	operator= (const OGRTriangle &other)
	Assignment operator. More...

	~OGRTriangle () override
	Destructor. More...

virtual const char *	getGeometryName () const override
	Fetch WKT name for geometry type. More...

virtual OGRwkbGeometryType	getGeometryType () const override
	Fetch geometry type. More...

virtual OGRErr	importFromWkb (const unsigned char *, int, OGRwkbVariant, int &nBytesConsumedOut) override
	Assign geometry from well known binary data. More...

virtual OGRErr	addRingDirectly (OGRCurve *poNewRing) override
	Add a ring to a polygon. More...

OGRPolygon *	toUpperClass ()
	Return pointer of this in upper class.

const OGRPolygon *	toUpperClass () const
	Return pointer of this in upper class.

virtual void	accept (IOGRGeometryVisitor *visitor) override
	Accept a visitor. More...

virtual void	accept (IOGRConstGeometryVisitor *visitor) const override
	Accept a visitor. More...

Public Member Functions inherited from OGRPolygon
	OGRPolygon ()
	Create an empty polygon.

	OGRPolygon (const OGRPolygon &other)
	Copy constructor. More...

OGRPolygon &	operator= (const OGRPolygon &other)
	Assignment operator. More...

ChildType **	begin ()
	Return begin of iterator. More...

ChildType **	end ()
	Return end of iterator.

const ChildType const	begin () const
	Return begin of iterator. More...

const ChildType const	end () const
	Return end of iterator.

virtual OGRBoolean	hasCurveGeometry (int bLookForNonLinear=FALSE) const override
	Returns if this geometry is or has curve geometry. More...

virtual OGRGeometry *	getCurveGeometry (const char const papszOptions=nullptr) const override
	Return curve version of this geometry. More...

virtual OGRGeometry *	getLinearGeometry (double dfMaxAngleStepSizeDegrees=0, const char const papszOptions=nullptr) const override
	Return, possibly approximate, non-curve version of this geometry. More...

virtual int	WkbSize () const override
	Returns size of related binary representation. More...

virtual OGRErr	exportToWkb (OGRwkbByteOrder, unsigned char *, OGRwkbVariant=wkbVariantOldOgc) const override
	Convert a geometry into well known binary format. More...

OGRErr	importFromWkt (const char **) override
	deprecated

virtual OGRErr	exportToWkt (char **ppszDstText, OGRwkbVariant=wkbVariantOldOgc) const override
	Convert a geometry into well known text format. More...

virtual OGRPolygon *	CurvePolyToPoly (double dfMaxAngleStepSizeDegrees=0, const char const papszOptions=nullptr) const override
	Return a polygon from a curve polygon. More...

OGRLinearRing *	getExteriorRing ()
	Fetch reference to external polygon ring. More...

const OGRLinearRing *	getExteriorRing () const
	Fetch reference to external polygon ring. More...

virtual OGRLinearRing *	getInteriorRing (int)
	Fetch reference to indicated internal ring. More...

virtual const OGRLinearRing *	getInteriorRing (int) const
	Fetch reference to indicated internal ring. More...

OGRLinearRing *	stealExteriorRing ()
	"Steal" reference to external polygon ring. More...

virtual OGRLinearRing *	stealInteriorRing (int)
	"Steal" reference to indicated interior ring. More...

OGRBoolean	IsPointOnSurface (const OGRPoint *) const
	Return whether the point is on the surface. More...

OGRCurvePolygon *	toUpperClass ()
	Return pointer of this in upper class.

const OGRCurvePolygon *	toUpperClass () const
	Return pointer of this in upper class.

virtual void	closeRings () override
	Force rings to be closed. More...

Public Member Functions inherited from OGRCurvePolygon
	OGRCurvePolygon ()
	Create an empty curve polygon.

	OGRCurvePolygon (const OGRCurvePolygon &)
	Copy constructor. More...

OGRCurvePolygon &	operator= (const OGRCurvePolygon &other)
	Assignment operator. More...

ChildType **	begin ()
	Return begin of curve iterator. More...

ChildType **	end ()
	Return end of curve iterator. More...

const ChildType const	begin () const
	Return begin of curve iterator. More...

const ChildType const	end () const
	Return end of curve iterator. More...

virtual OGRGeometry *	clone () const override
	Make a copy of this object. More...

virtual void	empty () override
	Clear geometry information. More...

virtual OGRErr	transform (OGRCoordinateTransformation *poCT) override
	Apply arbitrary coordinate transformation to geometry. More...

virtual void	flattenTo2D () override
	Convert geometry to strictly 2D. More...

virtual OGRBoolean	IsEmpty () const override
	Returns TRUE (non-zero) if the object has no points. More...

virtual void	segmentize (double dfMaxLength) override
	Modify the geometry such it has no segment longer then the given distance. More...

virtual double	get_Area () const override
	Get the area of the surface object. More...

virtual int	getDimension () const override
	Get the dimension of this object. More...

virtual void	getEnvelope (OGREnvelope *psEnvelope) const override
	Computes and returns the bounding envelope for this geometry in the passed psEnvelope structure. More...

virtual void	getEnvelope (OGREnvelope3D *psEnvelope) const override
	Computes and returns the bounding envelope (3D) for this geometry in the passed psEnvelope structure. More...

virtual OGRBoolean	Equals (const OGRGeometry *) const override
	Returns TRUE if two geometries are equivalent. More...

virtual OGRBoolean	Intersects (const OGRGeometry *) const override
	Do these features intersect? More...

virtual OGRBoolean	Contains (const OGRGeometry *) const override
	Test for containment. More...

virtual void	setCoordinateDimension (int nDimension) override
	Set the coordinate dimension. More...

virtual void	set3D (OGRBoolean bIs3D) override
	Add or remove the Z coordinate dimension. More...

virtual void	setMeasured (OGRBoolean bIsMeasured) override
	Add or remove the M coordinate dimension. More...

virtual void	assignSpatialReference (OGRSpatialReference *poSR) override
	Assign spatial reference to this object. More...

virtual OGRErr	addRing (OGRCurve *)
	Add a ring to a polygon. More...

OGRCurve *	getExteriorRingCurve ()
	Fetch reference to external polygon ring. More...

const OGRCurve *	getExteriorRingCurve () const
	Fetch reference to external polygon ring. More...

int	getNumInteriorRings () const
	Fetch the number of internal rings. More...

OGRCurve *	getInteriorRingCurve (int)
	Fetch reference to indicated internal ring. More...

const OGRCurve *	getInteriorRingCurve (int) const
	Fetch reference to indicated internal ring. More...

OGRCurve *	stealExteriorRingCurve ()
	"Steal" reference to external ring. More...

OGRErr	removeRing (int iIndex, bool bDelete=true)
	Remove a geometry from the container. More...

virtual void	swapXY () override
	Swap x and y coordinates. More...

Public Member Functions inherited from OGRSurface
virtual OGRErr	PointOnSurface (OGRPoint *poPoint) const
	This method relates to the SFCOM ISurface::get_PointOnSurface() method. More...

Public Member Functions inherited from OGRGeometry
	OGRGeometry (const OGRGeometry &other)
	Copy constructor. More...

OGRGeometry &	operator= (const OGRGeometry &other)
	Assignment operator. More...

bool	operator== (const OGRGeometry &other) const
	Returns if two geometries are equal. More...

bool	operator!= (const OGRGeometry &other) const
	Returns if two geometries are different. 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...

OGRErr	importFromWkb (const GByte *, int=-1, OGRwkbVariant=wkbVariantOldOgc)
	Assign geometry from well known binary data. More...

OGRErr	importFromWkt (char ppszInput) CPL_WARN_DEPRECATED("Use importFromWkt( const char) instead")
	Deprecated. More...

OGRwkbGeometryType	getIsoGeometryType () const
	Get the geometry type that conforms with ISO SQL/MM Part3. More...

virtual void	dumpReadable (FILE , const char =nullptr, char **papszOptions=nullptr) const
	Dump geometry in well known text format to indicated output file. More...

virtual char *	exportToGML (const char const papszOptions=nullptr) 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...

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	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	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...

OGRPoint *	toPoint ()
	Down-cast to OGRPoint*. More...

const OGRPoint *	toPoint () const
	Down-cast to OGRPoint*. More...

OGRCurve *	toCurve ()
	Down-cast to OGRCurve*. More...

const OGRCurve *	toCurve () const
	Down-cast to OGRCurve*. More...

OGRSimpleCurve *	toSimpleCurve ()
	Down-cast to OGRSimpleCurve*. More...

const OGRSimpleCurve *	toSimpleCurve () const
	Down-cast to OGRSimpleCurve*. More...

OGRLineString *	toLineString ()
	Down-cast to OGRLineString*. More...

const OGRLineString *	toLineString () const
	Down-cast to OGRLineString*. More...

OGRLinearRing *	toLinearRing ()
	Down-cast to OGRLinearRing*. More...

const OGRLinearRing *	toLinearRing () const
	Down-cast to OGRLinearRing*. More...

OGRCircularString *	toCircularString ()
	Down-cast to OGRCircularString*. More...

const OGRCircularString *	toCircularString () const
	Down-cast to OGRCircularString*. More...

OGRCompoundCurve *	toCompoundCurve ()
	Down-cast to OGRCompoundCurve*. More...

const OGRCompoundCurve *	toCompoundCurve () const
	Down-cast to OGRCompoundCurve*. More...

OGRSurface *	toSurface ()
	Down-cast to OGRSurface*. More...

const OGRSurface *	toSurface () const
	Down-cast to OGRSurface*. More...

OGRPolygon *	toPolygon ()
	Down-cast to OGRPolygon*. More...

const OGRPolygon *	toPolygon () const
	Down-cast to OGRPolygon*. More...

OGRTriangle *	toTriangle ()
	Down-cast to OGRTriangle*. More...

const OGRTriangle *	toTriangle () const
	Down-cast to OGRTriangle*. More...

OGRCurvePolygon *	toCurvePolygon ()
	Down-cast to OGRCurvePolygon*. More...

const OGRCurvePolygon *	toCurvePolygon () const
	Down-cast to OGRCurvePolygon*. More...

OGRGeometryCollection *	toGeometryCollection ()
	Down-cast to OGRGeometryCollection*. More...

const OGRGeometryCollection *	toGeometryCollection () const
	Down-cast to OGRGeometryCollection*. More...

OGRMultiPoint *	toMultiPoint ()
	Down-cast to OGRMultiPoint*. More...

const OGRMultiPoint *	toMultiPoint () const
	Down-cast to OGRMultiPoint*. More...

OGRMultiLineString *	toMultiLineString ()
	Down-cast to OGRMultiLineString*. More...

const OGRMultiLineString *	toMultiLineString () const
	Down-cast to OGRMultiLineString*. More...

OGRMultiPolygon *	toMultiPolygon ()
	Down-cast to OGRMultiPolygon*. More...

const OGRMultiPolygon *	toMultiPolygon () const
	Down-cast to OGRMultiPolygon*. More...

OGRMultiCurve *	toMultiCurve ()
	Down-cast to OGRMultiCurve*. More...

const OGRMultiCurve *	toMultiCurve () const
	Down-cast to OGRMultiCurve*. More...

OGRMultiSurface *	toMultiSurface ()
	Down-cast to OGRMultiSurface*. More...

const OGRMultiSurface *	toMultiSurface () const
	Down-cast to OGRMultiSurface*. More...

OGRPolyhedralSurface *	toPolyhedralSurface ()
	Down-cast to OGRPolyhedralSurface*. More...

const OGRPolyhedralSurface *	toPolyhedralSurface () const
	Down-cast to OGRPolyhedralSurface*. More...

OGRTriangulatedSurface *	toTriangulatedSurface ()
	Down-cast to OGRTriangulatedSurface*. More...

const OGRTriangulatedSurface *	toTriangulatedSurface () const
	Down-cast to OGRTriangulatedSurface*. More...

Additional Inherited Members
Public Types inherited from OGRPolygon
typedef OGRLinearRing	ChildType
	Type of child elements. More...

Public Types inherited from OGRCurvePolygon
typedef OGRCurve	ChildType
	Type of child elements. 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...

static OGRGeometryH	ToHandle (OGRGeometry *poGeom)
	Convert a OGRGeometry* to a OGRGeometryH. More...

static OGRGeometry *	FromHandle (OGRGeometryH hGeom)
	Convert a OGRGeometryH to a OGRGeometry*. More...

Static Protected Member Functions inherited from OGRCurvePolygon
static OGRPolygon *	CastToPolygon (OGRCurvePolygon *poCP)
	Convert to polygon. More...

Detailed Description

Triangle class.

Since: GDAL 2.2

Constructor & Destructor Documentation

◆ OGRTriangle() [1/2]

OGRTriangle::OGRTriangle	(	const OGRPoint &	p,
		const OGRPoint &	q,
		const OGRPoint &	r
	)

Construct a triangle from points.

Parameters

p	Point 1
q	Point 2
r	Point 3

◆ OGRTriangle() [2/2]

OGRTriangle::OGRTriangle	(	const OGRPolygon &	other,
		OGRErr &	eErr
	)

Constructs an OGRTriangle from a valid OGRPolygon.

In case of error, NULL is returned.

Parameters

other	the Polygon we wish to construct a triangle from
eErr	encapsulates an error code; contains OGRERR_NONE if the triangle is constructed successfully

◆ ~OGRTriangle()

OGRTriangle::~OGRTriangle ( )

overridedefault

Destructor.

Member Function Documentation

◆ accept() [1/2]

virtual void OGRTriangle::accept ( IOGRGeometryVisitor * visitor )

inlineoverridevirtual

Accept a visitor.

Reimplemented from OGRPolygon.

◆ accept() [2/2]

virtual void OGRTriangle::accept ( IOGRConstGeometryVisitor * visitor ) const

inlineoverridevirtual

Accept a visitor.

Reimplemented from OGRPolygon.

◆ addRingDirectly()

OGRErr OGRTriangle::addRingDirectly ( OGRCurve * poNewRing )

overridevirtual

Add a ring to a polygon.

If the polygon has no external ring (it is empty) this will be used as the external ring, otherwise it is used as an internal ring. Ownership of the passed ring is assumed by the OGRCurvePolygon, but otherwise this method operates the same as OGRCurvePolygon::AddRing().

This method has no SFCOM analog.

Parameters

poNewRing ring to be added to the polygon.

Returns: OGRERR_NONE in case of success

Reimplemented from OGRCurvePolygon.

◆ getGeometryName()

const char * OGRTriangle::getGeometryName ( ) const

overridevirtual

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 OGRPolygon.

◆ getGeometryType()

OGRwkbGeometryType OGRTriangle::getGeometryType ( ) const

overridevirtual

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 OGRPolygon.

◆ importFromWkb()

OGRErr OGRTriangle::importFromWkb	(	const unsigned char *	pabyData,
		int	nSize,
		OGRwkbVariant	eWkbVariant,
		int &	nBytesConsumedOut
	)

overridevirtual

Assign geometry from well known binary data.

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

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

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

Parameters

pabyData	the binary input data.
nSize	the size of pabyData in bytes, or -1 if not known.
eWkbVariant	if wkbVariantPostGIS1, special interpretation is done for curve geometries code
nBytesConsumedOut	output parameter. Number of bytes consumed.

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.

Since: GDAL 2.3

Reimplemented from OGRPolygon.

◆ operator=()

OGRTriangle & OGRTriangle::operator= ( const OGRTriangle & other )

Assignment operator.

Parameters

other A triangle passed as a parameter

Returns: OGRTriangle A copy of other

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

ogr_geometry.h
ogrtriangle.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ OGRTriangle() [1/2]

◆ OGRTriangle() [2/2]

◆ ~OGRTriangle()

Member Function Documentation

◆ accept() [1/2]

◆ accept() [2/2]

◆ addRingDirectly()

◆ getGeometryName()

◆ getGeometryType()

◆ importFromWkb()

◆ operator=()