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636e9c5ea3
Allows snapping of end points only, or end point to end point only Also update processing algorithm to match
67 lines
2.2 KiB
Plaintext
67 lines
2.2 KiB
Plaintext
/**
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* \class QgsGeometrySnapper
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* \ingroup analysis
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* QgsGeometrySnapper allows a geometry to be snapped to the geometries within a
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* different reference layer. Vertices in the geometries will be modified to
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* match the reference layer features within a specified snap tolerance.
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* \note added in QGIS 3.0
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*/
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class QgsGeometrySnapper : QObject
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{
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%TypeHeaderCode
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#include <qgsgeometrysnapper.h>
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%End
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public:
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//! Snapping modes
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enum SnapMode
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{
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PreferNodes,
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PreferClosest,
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EndPointPreferNodes,
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EndPointPreferClosest,
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EndPointToEndPoint,
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};
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/**
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* Constructor for QgsGeometrySnapper. A reference layer which contains geometries to snap to must be
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* set. It is assumed that all geometries snapped using this object will have the
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* same CRS as the reference layer (ie, no reprojection is performed).
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*/
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QgsGeometrySnapper( QgsVectorLayer* referenceLayer );
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/**
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* Snaps a geometry to the reference layer and returns the result. The geometry must be in the same
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* CRS as the reference layer, and must have the same type as the reference layer geometry. The snap tolerance
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* is specified in the layer units for the reference layer.
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*/
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QgsGeometry snapGeometry( const QgsGeometry& geometry, double snapTolerance, SnapMode mode = PreferNodes ) const;
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/**
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* Snaps a set of features to the reference layer and returns the result. This operation is
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* multithreaded for performance. The featureSnapped() signal will be emitted each time a feature
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* is processed. The snap tolerance is specified in the layer units for the reference layer.
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*/
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QgsFeatureList snapFeatures( const QgsFeatureList& features, double snapTolerance, SnapMode mode = PreferNodes );
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signals:
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//! Emitted each time a feature has been processed when calling snapFeatures()
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void featureSnapped();
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};
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class QgsInternalGeometrySnapper
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{
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%TypeHeaderCode
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#include <qgsgeometrysnapper.h>
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%End
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public:
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QgsInternalGeometrySnapper( double snapTolerance, QgsGeometrySnapper::SnapMode mode = QgsGeometrySnapper::PreferNodes );
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QgsGeometry snapFeature( const QgsFeature &feature );
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QgsGeometryMap snappedGeometries() const;
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};
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