Add native densify by interval algorithm

qgis · Jan 21, 2019 · 9452667 · 9452667
1 parent 8db14d8
commit 9452667
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Showing 7 changed files with 248 additions and 83 deletions.
diff --git a/python/plugins/processing/algs/qgis/DensifyGeometriesInterval.py b/python/plugins/processing/algs/qgis/DensifyGeometriesInterval.py
diff --git a/python/plugins/processing/algs/qgis/QgisAlgorithmProvider.py b/python/plugins/processing/algs/qgis/QgisAlgorithmProvider.py
@@ -61,7 +61,6 @@
 from .DeleteColumn import DeleteColumn
 from .DeleteDuplicateGeometries import DeleteDuplicateGeometries
 from .DensifyGeometries import DensifyGeometries
-from .DensifyGeometriesInterval import DensifyGeometriesInterval
 from .EliminateSelection import EliminateSelection
 from .ExecuteSQL import ExecuteSQL
 from .ExportGeometryInfo import ExportGeometryInfo
@@ -172,7 +171,6 @@ def getAlgs(self):
                 DeleteColumn(),
                 DeleteDuplicateGeometries(),
                 DensifyGeometries(),
-                DensifyGeometriesInterval(),
                 EliminateSelection(),
                 ExecuteSQL(),
                 ExportGeometryInfo(),

diff --git a/src/analysis/CMakeLists.txt b/src/analysis/CMakeLists.txt
@@ -32,6 +32,7 @@ SET(QGIS_ANALYSIS_SRCS
   processing/qgsalgorithmclip.cpp
   processing/qgsalgorithmconvexhull.cpp
   processing/qgsalgorithmdbscanclustering.cpp
+  processing/qgsalgorithmdensifygeometries.cpp
   processing/qgsalgorithmdifference.cpp
   processing/qgsalgorithmdissolve.cpp
   processing/qgsalgorithmdrape.cpp

diff --git a/src/analysis/processing/qgsalgorithmdensifygeometries.cpp b/src/analysis/processing/qgsalgorithmdensifygeometries.cpp
@@ -0,0 +1,98 @@
+/***************************************************************************
+                         qgsalgorithmdensifygeometries.cpp
+                         ---------------------
+    begin                : January 2019
+    copyright            : (C) 2019 by Matthias Kuhn
+    email                : matthias@opengis.ch
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+
+#include "qgsalgorithmdensifygeometries.h"
+
+QString QgsDensifyGeometriesAlgorithm::name() const
+{
+  return QStringLiteral( "densifygeometriesgivenaninterval" );
+}
+
+QString QgsDensifyGeometriesAlgorithm::displayName() const
+{
+  return QObject::tr( "Densify by interval" );
+}
+
+QStringList QgsDensifyGeometriesAlgorithm::tags() const
+{
+  return QObject::tr( "add,vertex,vertices,points,nodes" ).split( ',' );
+}
+
+QString QgsDensifyGeometriesAlgorithm::group() const
+{
+  return QObject::tr( "Vector geometry" );
+}
+
+QString QgsDensifyGeometriesAlgorithm::groupId() const
+{
+  return QStringLiteral( "vectorgeometry" );
+}
+
+QString QgsDensifyGeometriesAlgorithm::shortHelpString() const
+{
+  return QObject::tr( "Geometries are densified by adding additional vertices on "
+                      "edges that have a maximum distance of the interval parameter "
+                      "in map units." );
+}
+
+QString QgsDensifyGeometriesAlgorithm::shortDescription() const
+{
+  return QObject::tr( "Creates a densified version of geometries." );
+}
+
+QgsDensifyGeometriesAlgorithm *QgsDensifyGeometriesAlgorithm::createInstance() const
+{
+  return new QgsDensifyGeometriesAlgorithm;
+
+}
+
+QList<int> QgsDensifyGeometriesAlgorithm::inputLayerTypes() const
+{
+  return QList<int>() << QgsProcessing::TypeVectorLine << QgsProcessing::TypeVectorPolygon;
+}
+
+void QgsDensifyGeometriesAlgorithm::initParameters( const QVariantMap &configuration )
+{
+  Q_UNUSED( configuration )
+  addParameter( new QgsProcessingParameterDistance( QStringLiteral( "INTERVAL" ),
+                QObject::tr( "Interval between vertices to add" ),
+                1, QStringLiteral( "INPUT" ), false, 0, 10000000 ) );
+}
+
+QString QgsDensifyGeometriesAlgorithm::outputName() const
+{
+  return QObject::tr( "Densified" );
+}
+
+QgsFeatureList QgsDensifyGeometriesAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
+{
+  Q_UNUSED( context );
+  Q_UNUSED( feedback );
+  QgsFeature modifiedFeature = feature;
+  if ( feature.hasGeometry() )
+    modifiedFeature.setGeometry( feature.geometry().densifyByDistance( mInterval ) );
+
+  return QgsFeatureList() << modifiedFeature;
+}
+
+bool QgsDensifyGeometriesAlgorithm::prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
+{
+  Q_UNUSED( feedback );
+  mInterval = parameterAsDouble( parameters, QStringLiteral( "INTERVAL" ), context );
+  return true;
+}
diff --git a/src/analysis/processing/qgsalgorithmdensifygeometries.h b/src/analysis/processing/qgsalgorithmdensifygeometries.h
@@ -0,0 +1,55 @@
+/***************************************************************************
+                         qgsalgorithmdensifygeometries.h
+                         ---------------------
+    begin                : January 2019
+    copyright            : (C) 2019 by Matthias Kuhn
+    email                : matthias@opengis.ch
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef QGSALGORITHMDENSIFYGEOMETRIES_H
+#define QGSALGORITHMDENSIFYGEOMETRIES_H
+
+#define SIP_NO_FILE
+
+#include "qgis.h"
+#include "qgsprocessingalgorithm.h"
+
+///@cond PRIVATE
+
+
+class QgsDensifyGeometriesAlgorithm : public QgsProcessingFeatureBasedAlgorithm
+{
+  public:
+
+    QgsDensifyGeometriesAlgorithm() = default;
+    QString name() const override;
+    QString displayName() const override;
+    QStringList tags() const override;
+    QString group() const override;
+    QString groupId() const override;
+    QString shortHelpString() const override;
+    QString shortDescription() const override;
+    QgsDensifyGeometriesAlgorithm *createInstance() const override SIP_FACTORY;
+    QList<int> inputLayerTypes() const override;
+
+  protected:
+    void initParameters( const QVariantMap &configuration = QVariantMap() ) override;
+    QString outputName() const override;
+    QgsFeatureList processFeature( const QgsFeature &feature,  QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
+    bool prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) override;
+
+  private:
+    double mInterval = 0.0;
+};
+
+///@endcond PRIVATE
+#endif // QGSALGORITHMDENSIFYGEOMETRIES_H
diff --git a/src/analysis/processing/qgsnativealgorithms.cpp b/src/analysis/processing/qgsnativealgorithms.cpp
@@ -27,6 +27,7 @@
 #include "qgsalgorithmclip.h"
 #include "qgsalgorithmconvexhull.h"
 #include "qgsalgorithmdbscanclustering.h"
+#include "qgsalgorithmdensifygeometries.h"
 #include "qgsalgorithmdifference.h"
 #include "qgsalgorithmdissolve.h"
 #include "qgsalgorithmdrape.h"
@@ -246,6 +247,7 @@ void QgsNativeAlgorithms::loadAlgorithms()
   addAlgorithm( new QgsWedgeBuffersAlgorithm() );
   addAlgorithm( new QgsZonalHistogramAlgorithm() );
   addAlgorithm( new QgsPolygonsToLinesAlgorithm() );
+  addAlgorithm( new QgsDensifyGeometriesAlgorithm() );
 }