QgsInternalGeometrySnapper Class Reference

QgsInternalGeometrySnapper allows a set of geometries to be snapped to each other. More...

#include <qgsgeometrysnapper.h>

Public Member Functions
	QgsInternalGeometrySnapper (double snapTolerance, QgsGeometrySnapper::SnapMode mode=QgsGeometrySnapper::PreferNodes)
	Constructor for QgsInternalGeometrySnapper. More...
QgsGeometry	snapFeature (const QgsFeature &feature)
	Snaps a single feature's geometry against all feature geometries already processed by calls to snapFeature() in this object, and returns the snapped geometry. More...
QgsGeometryMap	snappedGeometries () const
	Returns a QgsGeometryMap of all feature geometries snapped by this object. More...

Detailed Description

QgsInternalGeometrySnapper allows a set of geometries to be snapped to each other.

It can be used to close gaps in layers.

To use QgsInternalGeometrySnapper, first construct the snapper using the desired snap parameters. Then, features are fed to to the snapper one-by-one by calling snapFeature(). Each feature passed by calling snapFeature() will be snapped to any features which have already been processed by the snapper.

After processing all desired features, the results can be fetched by calling snappedGeometries(). The returned QgsGeometryMap can be passed to QgsVectorDataProvider::changeGeometryValues() to save the snapped geometries back to the source layer.

Since

QGIS 3.0

Definition at line 133 of file qgsgeometrysnapper.h.

Constructor & Destructor Documentation

QgsInternalGeometrySnapper::QgsInternalGeometrySnapper	(	double	snapTolerance,
		QgsGeometrySnapper::SnapMode	mode = QgsGeometrySnapper::PreferNodes
	)

Constructor for QgsInternalGeometrySnapper.

The snapTolerance and mode parameters dictate how geometries will be snapped by the snapper.

Definition at line 741 of file qgsgeometrysnapper.cpp.

Member Function Documentation

QgsGeometry QgsInternalGeometrySnapper::snapFeature

(

const QgsFeature &

feature

)

Snaps a single feature's geometry against all feature geometries already processed by calls to snapFeature() in this object, and returns the snapped geometry.

Definition at line 746 of file qgsgeometrysnapper.cpp.

QgsGeometryMap QgsInternalGeometrySnapper::snappedGeometries ( ) const

inline

Returns a QgsGeometryMap of all feature geometries snapped by this object.

Definition at line 153 of file qgsgeometrysnapper.h.

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

• /build/qgis-3.4.15+24xenial/src/analysis/vector/qgsgeometrysnapper.h
• /build/qgis-3.4.15+24xenial/src/analysis/vector/qgsgeometrysnapper.cpp