Implementation of GeometrySimplifier using the Douglas-Peucker algorithm. More...

#include <qgsgeometrysimplifier.h>

Inheritance diagram for QgsTopologyPreservingSimplifier:

Public Member Functions
	QgsTopologyPreservingSimplifier (double tolerance)
	Implementation of GeometrySimplifier using the Douglas-Peucker algorithm. More...

virtual	~QgsTopologyPreservingSimplifier ()

virtual QgsGeometry *	simplify (QgsGeometry *geometry) const override
	Returns a simplified version the specified geometry. More...

virtual bool	simplifyGeometry (QgsGeometry *geometry) const override
	Simplifies the specified geometry. More...

Public Member Functions inherited from QgsAbstractGeometrySimplifier
virtual	~QgsAbstractGeometrySimplifier ()

Protected Attributes
double	mTolerance
	Distance tolerance for the simplification. More...

Additional Inherited Members
Static Public Member Functions inherited from QgsAbstractGeometrySimplifier
static bool	isGeneralizableByDeviceBoundingBox (const QgsRectangle &envelope, float mapToPixelTol=1.0f)
	Returns whether the device-envelope can be replaced by its BBOX when is applied the specified tolerance. More...

static bool	isGeneralizableByDeviceBoundingBox (const QVector< QPointF > &points, float mapToPixelTol=1.0f)
	Returns whether the device-geometry can be replaced by its BBOX when is applied the specified tolerance. More...

Detailed Description

Implementation of GeometrySimplifier using the Douglas-Peucker algorithm.

Simplifies a geometry, ensuring that the result is a valid geometry having the same dimension and number of components as the input. The simplification uses a maximum distance difference algorithm similar to the one used in the Douglas-Peucker algorithm.

Definition at line 50 of file qgsgeometrysimplifier.h.

Constructor & Destructor Documentation

◆ QgsTopologyPreservingSimplifier()

QgsTopologyPreservingSimplifier::QgsTopologyPreservingSimplifier ( double tolerance )

Implementation of GeometrySimplifier using the Douglas-Peucker algorithm.

Definition at line 47 of file qgsgeometrysimplifier.cpp.

◆ ~QgsTopologyPreservingSimplifier()

QgsTopologyPreservingSimplifier::~QgsTopologyPreservingSimplifier ( )

virtual

Definition at line 50 of file qgsgeometrysimplifier.cpp.

Member Function Documentation

◆ simplify()

QgsGeometry * QgsTopologyPreservingSimplifier::simplify ( QgsGeometry * geometry ) const

overridevirtual

Returns a simplified version the specified geometry.

Implements QgsAbstractGeometrySimplifier.

Definition at line 55 of file qgsgeometrysimplifier.cpp.

◆ simplifyGeometry()

bool QgsTopologyPreservingSimplifier::simplifyGeometry ( QgsGeometry * geometry ) const

overridevirtual

Simplifies the specified geometry.

Implements QgsAbstractGeometrySimplifier.

Definition at line 61 of file qgsgeometrysimplifier.cpp.

Member Data Documentation

◆ mTolerance

double QgsTopologyPreservingSimplifier::mTolerance

protected

Distance tolerance for the simplification.

Definition at line 63 of file qgsgeometrysimplifier.h.

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

/tmp/buildd/qgis-2.18.21+99unstable/src/core/qgsgeometrysimplifier.h
/tmp/buildd/qgis-2.18.21+99unstable/src/core/qgsgeometrysimplifier.cpp

Public Member Functions

Protected Attributes

Additional Inherited Members