SFCGAL::algorithm::BoundaryVisitor Class Reference

Compute the boundary for a Geometry. More...

#include <BoundaryVisitor.h>

Inheritance diagram for SFCGAL::algorithm::BoundaryVisitor:

Public Member Functions
virtual void	visit (const Point &g)
virtual void	visit (const LineString &g)
virtual void	visit (const Polygon &g)
virtual void	visit (const Triangle &g)
virtual void	visit (const Solid &g)
virtual void	visit (const MultiPoint &g)
virtual void	visit (const MultiLineString &g)
virtual void	visit (const MultiPolygon &g)
virtual void	visit (const MultiSolid &g)
virtual void	visit (const GeometryCollection &g)
virtual void	visit (const PolyhedralSurface &g)
virtual void	visit (const TriangulatedSurface &g)
Geometry *	releaseBoundary ()
	get the boundary
Public Member Functions inherited from SFCGAL::ConstGeometryVisitor
virtual	~ConstGeometryVisitor ()
virtual void	visit (const Geometry &g)
	apply visitor

Protected Member Functions
void	getBoundaryFromLineStrings (const graph::GeometryGraph &g)
	get the boundary vertices for a set of LineString in a GeometryGraph
void	getBoundaryFromPolygons (const graph::GeometryGraph &g)
	get the boundary edges for a set of Polygons in a GeometryGraph

Detailed Description

Compute the boundary for a Geometry.

boundary( Point ) : GEOMETRYCOLLECTION EMPTY boundary( LineString ) : either GEOMETRYCOLLECTION EMPTY is the LineString is closed, or MULTIPOINT(2) boundary( Polygon ) : LINESTRING | MULTILINESTRING (polygon rings) boundary( Triangle ) : either GEOMETRYCOLLECTION EMPTY is the LineString is closed, or MULTIPOINT(2)

boundary( MultiPoint ) : GEOMETRYCOLLECTION EMPTY boundary( MultiLineString ) : either GEOMETRYCOLLECTION EMPTY or single occurance points

Warning

GeometryCollection are not supported in the general case

@ŧodo Solid

Todo

MultiPolygon, PolyhedralSurface, TriangulatedSurface (same graph algorithm, edges without parallel or opposite)

Todo

GeometryCollection : complex for heterogeneous collection (not supported in GEOS)

MultiSolid : faced elimination

Member Function Documentation

getBoundaryFromLineStrings()

void SFCGAL::algorithm::BoundaryVisitor::getBoundaryFromLineStrings ( const graph::GeometryGraph & g )

protected

get the boundary vertices for a set of LineString in a GeometryGraph

getBoundaryFromPolygons()

void SFCGAL::algorithm::BoundaryVisitor::getBoundaryFromPolygons ( const graph::GeometryGraph & g )

protected

get the boundary edges for a set of Polygons in a GeometryGraph

Warning

not optimal (edges could be counted using complex< vertex_descriptor >)

Todo

merge resulting edges

releaseBoundary()

auto SFCGAL::algorithm::BoundaryVisitor::releaseBoundary

(

)

get the boundary

visit() [1/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const GeometryCollection & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [2/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const LineString & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [3/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const MultiLineString & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [4/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const MultiPoint & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [5/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const MultiPolygon & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [6/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const MultiSolid & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [7/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const Point & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [8/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const Polygon & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [9/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const PolyhedralSurface & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [10/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const Solid & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [11/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const Triangle & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.

visit() [12/12]

void SFCGAL::algorithm::BoundaryVisitor::visit ( const TriangulatedSurface & g )

virtual

Implements SFCGAL::ConstGeometryVisitor.