SFCGAL::algorithm::BoundaryVisitor Class Reference

Compute the boundary for a Geometry. More...

#include <BoundaryVisitor.h>

Inheritance diagram for SFCGAL::algorithm::BoundaryVisitor:

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

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

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)

MultiSolid : faced elimination

Todo:

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

Member Function Documentation

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

protected

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

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

auto SFCGAL::algorithm::BoundaryVisitor::releaseBoundary

(

)

get the boundary

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.

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

overridevirtual

Implements SFCGAL::ConstGeometryVisitor.