QgsTopologyPreservingSimplifier Class Reference

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.
virtual	~QgsTopologyPreservingSimplifier ()
virtual QgsGeometry *	simplify (QgsGeometry *geometry) const
	Returns a simplified version the specified geometry.
virtual bool	simplifyGeometry (QgsGeometry *geometry) const
	Simplifies the specified geometry.
Public Member Functions inherited from QgsAbstractGeometrySimplifier
virtual	~QgsAbstractGeometrySimplifier ()

Protected Attributes
double	mTolerance
	Distance tolerance for the simplification.

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.
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.

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.

Constructor & Destructor Documentation

QgsTopologyPreservingSimplifier::QgsTopologyPreservingSimplifier

(

double

tolerance

)

Implementation of GeometrySimplifier using the Douglas-Peucker algorithm.

QgsTopologyPreservingSimplifier::~QgsTopologyPreservingSimplifier ( )

virtual

Member Function Documentation

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

virtual

Returns a simplified version the specified geometry.

Implements QgsAbstractGeometrySimplifier.

bool QgsTopologyPreservingSimplifier::simplifyGeometry ( QgsGeometry *  geometry ) const

virtual

Simplifies the specified geometry.

Implements QgsAbstractGeometrySimplifier.

Member Data Documentation

double QgsTopologyPreservingSimplifier::mTolerance

protected

Distance tolerance for the simplification.

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

• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsgeometrysimplifier.h
• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsgeometrysimplifier.cpp