QgsAbstractGeometrySimplifier Class Reference

Abstract base class for simplify geometries using a specific algorithm. More...

#include <qgsgeometrysimplifier.h>

Inheritance diagram for QgsAbstractGeometrySimplifier:

Public Member Functions
virtual	~QgsAbstractGeometrySimplifier ()
virtual QgsGeometry *	simplify (QgsGeometry *geometry) const =0
	Returns a simplified version the specified geometry.
virtual bool	simplifyGeometry (QgsGeometry *geometry) const =0
	Simplifies the specified geometry.

Static Public Member Functions
static bool	canbeGeneralizedByDeviceBoundingBox (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	canbeGeneralizedByDeviceBoundingBox (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

Abstract base class for simplify geometries using a specific algorithm.

Definition at line 25 of file qgsgeometrysimplifier.h.

Constructor & Destructor Documentation

QgsAbstractGeometrySimplifier::~QgsAbstractGeometrySimplifier ( )

virtual

Definition at line 20 of file qgsgeometrysimplifier.cpp.

Member Function Documentation

bool QgsAbstractGeometrySimplifier::canbeGeneralizedByDeviceBoundingBox ( const QgsRectangle &  envelope, float  mapToPixelTol = 1.0f  )

static

Returns whether the device-envelope can be replaced by its BBOX when is applied the specified tolerance.

Definition at line 25 of file qgsgeometrysimplifier.cpp.

References QgsRectangle::xMaximum(), QgsRectangle::xMinimum(), QgsRectangle::yMaximum(), and QgsRectangle::yMinimum().

Referenced by QgsFillSymbolLayerV2::_renderPolygon(), canbeGeneralizedByDeviceBoundingBox(), and QgsSimpleLineSymbolLayerV2::renderPolyline().

bool QgsAbstractGeometrySimplifier::canbeGeneralizedByDeviceBoundingBox ( const QVector< QPointF > &  points, float  mapToPixelTol = 1.0f  )

static

Returns whether the device-geometry can be replaced by its BBOX when is applied the specified tolerance.

Definition at line 31 of file qgsgeometrysimplifier.cpp.

References canbeGeneralizedByDeviceBoundingBox(), and MathUtils::max().

virtual QgsGeometry* QgsAbstractGeometrySimplifier::simplify ( QgsGeometry *  geometry ) const

pure virtual

Returns a simplified version the specified geometry.

Implemented in QgsMapToPixelSimplifier, and QgsTopologyPreservingSimplifier.

virtual bool QgsAbstractGeometrySimplifier::simplifyGeometry ( QgsGeometry *  geometry ) const

pure virtual

Simplifies the specified geometry.

Implemented in QgsMapToPixelSimplifier, and QgsTopologyPreservingSimplifier.

Referenced by QgsAbstractFeatureIterator::simplify(), QgsVectorLayerFeatureIterator::useAddedFeature(), and QgsVectorLayerFeatureIterator::useChangedAttributeFeature().

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

• /tmp/buildd/qgis-2.2.0+wheezy1/src/core/qgsgeometrysimplifier.h
• /tmp/buildd/qgis-2.2.0+wheezy1/src/core/qgsgeometrysimplifier.cpp