void QgsNetworkAnalysisAlgorithmBase::loadCommonParams( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
Q_UNUSED( feedback );
mNetwork.reset( parameterAsSource( parameters, QStringLiteral( "INPUT" ), context ) );
if ( !mNetwork )
throw QgsProcessingException( invalidSourceError( parameters, QStringLiteral( "INPUT" ) ) );
int strategy = parameterAsInt( parameters, QStringLiteral( "STRATEGY" ), context );
QString directionFieldName = parameterAsString( parameters, QStringLiteral( "DIRECTION_FIELD" ), context );
QString forwardValue = parameterAsString( parameters, QStringLiteral( "VALUE_FORWARD" ), context );
QString backwardValue = parameterAsString( parameters, QStringLiteral( "VALUE_BACKWARD" ), context );
QString bothValue = parameterAsString( parameters, QStringLiteral( "VALUE_BOTH" ), context );
QgsVectorLayerDirector::Direction defaultDirection = static_cast< QgsVectorLayerDirector::Direction>( parameterAsInt( parameters, QStringLiteral( "DEFAULT_DIRECTION" ), context ) );
QString speedFieldName = parameterAsString( parameters, QStringLiteral( "SPEED_FIELD" ), context );
double defaultSpeed = parameterAsDouble( parameters, QStringLiteral( "DEFAULT_SPEED" ), context );
double tolerance = parameterAsDouble( parameters, QStringLiteral( "TOLERANCE" ), context );
int directionField = -1;
if ( !directionFieldName.isEmpty() )
{
directionField = mNetwork->fields().lookupField( directionFieldName );
}
int speedField = -1;
if ( !speedFieldName.isEmpty() )
{
speedField = mNetwork->fields().lookupField( speedFieldName );
}
mDirector = new QgsVectorLayerDirector( mNetwork.get(), directionField, forwardValue, backwardValue, bothValue, defaultDirection );
QgsUnitTypes::DistanceUnit distanceUnits = context.project()->crs().mapUnits();
mMultiplier = QgsUnitTypes::fromUnitToUnitFactor( distanceUnits, QgsUnitTypes::DistanceMeters );
if ( strategy )
{
mDirector->addStrategy( new QgsNetworkSpeedStrategy( speedField, defaultSpeed, mMultiplier * 1000.0 / 3600.0 ) );
mMultiplier = 3600;
}
else
{
mDirector->addStrategy( new QgsNetworkDistanceStrategy() );
}
mBuilder = qgis::make_unique< QgsGraphBuilder >( mNetwork->sourceCrs(), true, tolerance );
}
bool QgsReclassifyAlgorithmBase::prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
mDataType = QgsRasterAnalysisUtils::rasterTypeChoiceToDataType( parameterAsEnum( parameters, QStringLiteral( "DATA_TYPE" ), context ) );
QgsRasterLayer *layer = parameterAsRasterLayer( parameters, QStringLiteral( "INPUT_RASTER" ), context );
if ( !layer )
throw QgsProcessingException( invalidRasterError( parameters, QStringLiteral( "INPUT_RASTER" ) ) );
mBand = parameterAsInt( parameters, QStringLiteral( "RASTER_BAND" ), context );
if ( mBand < 1 || mBand > layer->bandCount() )
throw QgsProcessingException( QObject::tr( "Invalid band number for RASTER_BAND (%1): Valid values for input raster are 1 to %2" ).arg( mBand )
.arg( layer->bandCount() ) );
mInterface.reset( layer->dataProvider()->clone() );
mExtent = layer->extent();
mCrs = layer->crs();
mRasterUnitsPerPixelX = std::abs( layer->rasterUnitsPerPixelX() );
mRasterUnitsPerPixelY = std::abs( layer->rasterUnitsPerPixelY() );
mNbCellsXProvider = mInterface->xSize();
mNbCellsYProvider = mInterface->ySize();
mNoDataValue = parameterAsDouble( parameters, QStringLiteral( "NO_DATA" ), context );
mUseNoDataForMissingValues = parameterAsBool( parameters, QStringLiteral( "NODATA_FOR_MISSING" ), context );
int boundsType = parameterAsEnum( parameters, QStringLiteral( "RANGE_BOUNDARIES" ), context );
switch ( boundsType )
{
case 0:
mBoundsType = QgsReclassifyUtils::RasterClass::IncludeMax;
break;
case 1:
mBoundsType = QgsReclassifyUtils::RasterClass::IncludeMin;
break;
case 2:
mBoundsType = QgsReclassifyUtils::RasterClass::IncludeMinAndMax;
break;
case 3:
mBoundsType = QgsReclassifyUtils::RasterClass::Exclusive;
break;
}
return _prepareAlgorithm( parameters, context, feedback );
}
bool QgsZonalHistogramAlgorithm::prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback * )
{
QgsRasterLayer *layer = parameterAsRasterLayer( parameters, QStringLiteral( "INPUT_RASTER" ), context );
if ( !layer )
throw QgsProcessingException( invalidRasterError( parameters, QStringLiteral( "INPUT_RASTER" ) ) );
mRasterBand = parameterAsInt( parameters, QStringLiteral( "RASTER_BAND" ), context );
mHasNoDataValue = layer->dataProvider()->sourceHasNoDataValue( mRasterBand );
mNodataValue = layer->dataProvider()->sourceNoDataValue( mRasterBand );
mRasterInterface.reset( layer->dataProvider()->clone() );
mRasterExtent = layer->extent();
mCrs = layer->crs();
mCellSizeX = std::abs( layer->rasterUnitsPerPixelX() );
mCellSizeY = std::abs( layer->rasterUnitsPerPixelX() );
mNbCellsXProvider = mRasterInterface->xSize();
mNbCellsYProvider = mRasterInterface->ySize();
return true;
}
QVariantMap QgsBufferAlgorithm::processAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback ) const
{
std::unique_ptr< QgsFeatureSource > source( parameterAsSource( parameters, QStringLiteral( "INPUT" ), context ) );
if ( !source )
return QVariantMap();
QString dest;
std::unique_ptr< QgsFeatureSink > sink( parameterAsSink( parameters, QStringLiteral( "OUTPUT_LAYER" ), context, source->fields(), QgsWkbTypes::Polygon, source->sourceCrs(), dest ) );
if ( !sink )
return QVariantMap();
// fixed parameters
bool dissolve = parameterAsBool( parameters, QStringLiteral( "DISSOLVE" ), context );
int segments = parameterAsInt( parameters, QStringLiteral( "SEGMENTS" ), context );
QgsGeometry::EndCapStyle endCapStyle = static_cast< QgsGeometry::EndCapStyle >( 1 + parameterAsInt( parameters, QStringLiteral( "END_CAP_STYLE" ), context ) );
QgsGeometry::JoinStyle joinStyle = static_cast< QgsGeometry::JoinStyle>( 1 + parameterAsInt( parameters, QStringLiteral( "JOIN_STYLE" ), context ) );
double miterLimit = parameterAsDouble( parameters, QStringLiteral( "MITRE_LIMIT" ), context );
double bufferDistance = parameterAsDouble( parameters, QStringLiteral( "DISTANCE" ), context );
bool dynamicBuffer = QgsProcessingParameters::isDynamic( parameters, QStringLiteral( "DISTANCE" ) );
const QgsProcessingParameterDefinition *distanceParamDef = parameterDefinition( QStringLiteral( "DISTANCE" ) );
long count = source->featureCount();
if ( count <= 0 )
return QVariantMap();
QgsFeature f;
QgsFeatureIterator it = source->getFeatures();
double step = 100.0 / count;
int current = 0;
QList< QgsGeometry > bufferedGeometriesForDissolve;
QgsAttributes dissolveAttrs;
while ( it.nextFeature( f ) )
{
if ( feedback->isCanceled() )
{
break;
}
if ( dissolveAttrs.isEmpty() )
dissolveAttrs = f.attributes();
QgsFeature out = f;
if ( out.hasGeometry() )
{
if ( dynamicBuffer )
{
context.expressionContext().setFeature( f );
bufferDistance = QgsProcessingParameters::parameterAsDouble( distanceParamDef, parameters, context );
}
QgsGeometry outputGeometry = f.geometry().buffer( bufferDistance, segments, endCapStyle, joinStyle, miterLimit );
if ( !outputGeometry )
{
QgsMessageLog::logMessage( QObject::tr( "Error calculating buffer for feature %1" ).arg( f.id() ), QObject::tr( "Processing" ), QgsMessageLog::WARNING );
}
if ( dissolve )
bufferedGeometriesForDissolve << outputGeometry;
else
out.setGeometry( outputGeometry );
}
if ( !dissolve )
sink->addFeature( out );
feedback->setProgress( current * step );
current++;
}
if ( dissolve )
{
QgsGeometry finalGeometry = QgsGeometry::unaryUnion( bufferedGeometriesForDissolve );
QgsFeature f;
f.setGeometry( finalGeometry );
f.setAttributes( dissolveAttrs );
sink->addFeature( f );
}
QVariantMap outputs;
outputs.insert( QStringLiteral( "OUTPUT_LAYER" ), dest );
return outputs;
}
QVariantMap QgsTransectAlgorithm::processAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
Side orientation = static_cast< QgsTransectAlgorithm::Side >( parameterAsInt( parameters, QStringLiteral( "SIDE" ), context ) );
double angle = fabs( parameterAsDouble( parameters, QStringLiteral( "ANGLE" ), context ) );
bool dynamicAngle = QgsProcessingParameters::isDynamic( parameters, QStringLiteral( "ANGLE" ) );
QgsProperty angleProperty;
if ( dynamicAngle )
angleProperty = parameters.value( QStringLiteral( "ANGLE" ) ).value< QgsProperty >();
double length = parameterAsDouble( parameters, QStringLiteral( "LENGTH" ), context );
bool dynamicLength = QgsProcessingParameters::isDynamic( parameters, QStringLiteral( "LENGTH" ) );
QgsProperty lengthProperty;
if ( dynamicLength )
lengthProperty = parameters.value( QStringLiteral( "LENGTH" ) ).value< QgsProperty >();
if ( orientation == QgsTransectAlgorithm::Both )
length /= 2.0;
std::unique_ptr< QgsFeatureSource > source( parameterAsSource( parameters, QStringLiteral( "INPUT" ), context ) );
if ( !source )
throw QgsProcessingException( invalidSourceError( parameters, QStringLiteral( "INPUT" ) ) );
QgsExpressionContext expressionContext = createExpressionContext( parameters, context, dynamic_cast< QgsProcessingFeatureSource * >( source.get() ) );
QgsFields fields = source->fields();
fields.append( QgsField( QStringLiteral( "TR_FID" ), QVariant::Int, QString(), 20 ) );
fields.append( QgsField( QStringLiteral( "TR_ID" ), QVariant::Int, QString(), 20 ) );
fields.append( QgsField( QStringLiteral( "TR_SEGMENT" ), QVariant::Int, QString(), 20 ) );
fields.append( QgsField( QStringLiteral( "TR_ANGLE" ), QVariant::Double, QString(), 5, 2 ) );
fields.append( QgsField( QStringLiteral( "TR_LENGTH" ), QVariant::Double, QString(), 20, 6 ) );
fields.append( QgsField( QStringLiteral( "TR_ORIENT" ), QVariant::Int, QString(), 1 ) );
QgsWkbTypes::Type outputWkb = QgsWkbTypes::LineString;
if ( QgsWkbTypes::hasZ( source->wkbType() ) )
outputWkb = QgsWkbTypes::addZ( outputWkb );
if ( QgsWkbTypes::hasM( source->wkbType() ) )
outputWkb = QgsWkbTypes::addM( outputWkb );
QString dest;
std::unique_ptr< QgsFeatureSink > sink( parameterAsSink( parameters, QStringLiteral( "OUTPUT" ), context, dest, fields,
outputWkb, source->sourceCrs(), QgsFeatureSink::RegeneratePrimaryKey ) );
if ( !sink )
throw QgsProcessingException( invalidSinkError( parameters, QStringLiteral( "OUTPUT" ) ) );
QgsFeatureIterator features = source->getFeatures( );
int current = -1;
int number = 0;
double step = source->featureCount() > 0 ? 100.0 / source->featureCount() : 1;
QgsFeature feat;
while ( features.nextFeature( feat ) )
{
current++;
if ( feedback->isCanceled() )
{
break;
}
feedback->setProgress( current * step );
if ( !feat.hasGeometry() )
continue;
QgsGeometry inputGeometry = feat.geometry();
if ( dynamicLength || dynamicAngle )
{
expressionContext.setFeature( feat );
}
double evaluatedLength = length;
if ( dynamicLength )
evaluatedLength = lengthProperty.valueAsDouble( context.expressionContext(), length );
double evaluatedAngle = angle;
if ( dynamicAngle )
evaluatedAngle = angleProperty.valueAsDouble( context.expressionContext(), angle );
inputGeometry.convertToMultiType();
const QgsMultiLineString *multiLine = static_cast< const QgsMultiLineString * >( inputGeometry.constGet() );
for ( int id = 0; id < multiLine->numGeometries(); ++id )
{
const QgsLineString *line = static_cast< const QgsLineString * >( multiLine->geometryN( id ) );
QgsAbstractGeometry::vertex_iterator it = line->vertices_begin();
while ( it != line->vertices_end() )
{
QgsVertexId vertexId = it.vertexId();
int i = vertexId.vertex;
QgsFeature outFeat;
QgsAttributes attrs = feat.attributes();
attrs << current << number << i + 1 << evaluatedAngle <<
( ( orientation == QgsTransectAlgorithm::Both ) ? evaluatedLength * 2 : evaluatedLength ) <<
orientation;
outFeat.setAttributes( attrs );
double angleAtVertex = line->vertexAngle( vertexId );
outFeat.setGeometry( calcTransect( *it, angleAtVertex, evaluatedLength, orientation, evaluatedAngle ) );
sink->addFeature( outFeat, QgsFeatureSink::FastInsert );
number++;
it++;
}
}
}
QVariantMap outputs;
outputs.insert( QStringLiteral( "OUTPUT" ), dest );
return outputs;
}
bool QgsMinimumEnclosingCircleAlgorithm::prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback * )
{
mSegments = parameterAsInt( parameters, QStringLiteral( "SEGMENTS" ), context );
return true;
}
QVariantMap QgsBufferAlgorithm::processAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
std::unique_ptr< QgsFeatureSource > source( parameterAsSource( parameters, QStringLiteral( "INPUT" ), context ) );
if ( !source )
throw QgsProcessingException( invalidSourceError( parameters, QStringLiteral( "INPUT" ) ) );
QString dest;
std::unique_ptr< QgsFeatureSink > sink( parameterAsSink( parameters, QStringLiteral( "OUTPUT" ), context, dest, source->fields(), QgsWkbTypes::Polygon, source->sourceCrs() ) );
if ( !sink )
throw QgsProcessingException( invalidSinkError( parameters, QStringLiteral( "OUTPUT" ) ) );
// fixed parameters
bool dissolve = parameterAsBool( parameters, QStringLiteral( "DISSOLVE" ), context );
int segments = parameterAsInt( parameters, QStringLiteral( "SEGMENTS" ), context );
QgsGeometry::EndCapStyle endCapStyle = static_cast< QgsGeometry::EndCapStyle >( 1 + parameterAsInt( parameters, QStringLiteral( "END_CAP_STYLE" ), context ) );
QgsGeometry::JoinStyle joinStyle = static_cast< QgsGeometry::JoinStyle>( 1 + parameterAsInt( parameters, QStringLiteral( "JOIN_STYLE" ), context ) );
double miterLimit = parameterAsDouble( parameters, QStringLiteral( "MITER_LIMIT" ), context );
double bufferDistance = parameterAsDouble( parameters, QStringLiteral( "DISTANCE" ), context );
bool dynamicBuffer = QgsProcessingParameters::isDynamic( parameters, QStringLiteral( "DISTANCE" ) );
QgsExpressionContext expressionContext = createExpressionContext( parameters, context, dynamic_cast< QgsProcessingFeatureSource * >( source.get() ) );
QgsProperty bufferProperty;
if ( dynamicBuffer )
{
bufferProperty = parameters.value( QStringLiteral( "DISTANCE" ) ).value< QgsProperty >();
}
long count = source->featureCount();
QgsFeature f;
QgsFeatureIterator it = source->getFeatures();
double step = count > 0 ? 100.0 / count : 1;
int current = 0;
QVector< QgsGeometry > bufferedGeometriesForDissolve;
QgsAttributes dissolveAttrs;
while ( it.nextFeature( f ) )
{
if ( feedback->isCanceled() )
{
break;
}
if ( dissolveAttrs.isEmpty() )
dissolveAttrs = f.attributes();
QgsFeature out = f;
if ( out.hasGeometry() )
{
double distance = bufferDistance;
if ( dynamicBuffer )
{
expressionContext.setFeature( f );
distance = bufferProperty.valueAsDouble( expressionContext, bufferDistance );
}
QgsGeometry outputGeometry = f.geometry().buffer( distance, segments, endCapStyle, joinStyle, miterLimit );
if ( !outputGeometry )
{
QgsMessageLog::logMessage( QObject::tr( "Error calculating buffer for feature %1" ).arg( f.id() ), QObject::tr( "Processing" ), Qgis::Warning );
}
if ( dissolve )
bufferedGeometriesForDissolve << outputGeometry;
else
out.setGeometry( outputGeometry );
}
if ( !dissolve )
sink->addFeature( out, QgsFeatureSink::FastInsert );
feedback->setProgress( current * step );
current++;
}
if ( dissolve )
{
QgsGeometry finalGeometry = QgsGeometry::unaryUnion( bufferedGeometriesForDissolve );
QgsFeature f;
f.setGeometry( finalGeometry );
f.setAttributes( dissolveAttrs );
sink->addFeature( f, QgsFeatureSink::FastInsert );
}
QVariantMap outputs;
outputs.insert( QStringLiteral( "OUTPUT" ), dest );
return outputs;
}
bool QgsSubdivideAlgorithm::prepareAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback * )
{
mMaxNodes = parameterAsInt( parameters, QStringLiteral( "MAX_NODES" ), context );
return true;
}
QVariantMap QgsDbscanClusteringAlgorithm::processAlgorithm( const QVariantMap ¶meters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
std::unique_ptr< QgsProcessingFeatureSource > source( parameterAsSource( parameters, QStringLiteral( "INPUT" ), context ) );
if ( !source )
throw QgsProcessingException( invalidSourceError( parameters, QStringLiteral( "INPUT" ) ) );
const std::size_t minSize = static_cast< std::size_t>( parameterAsInt( parameters, QStringLiteral( "MIN_SIZE" ), context ) );
const double eps = parameterAsDouble( parameters, QStringLiteral( "EPS" ), context );
const bool borderPointsAreNoise = parameterAsBoolean( parameters, QStringLiteral( "DBSCAN*" ), context );
QgsFields outputFields = source->fields();
const QString clusterFieldName = parameterAsString( parameters, QStringLiteral( "FIELD_NAME" ), context );
QgsFields newFields;
newFields.append( QgsField( clusterFieldName, QVariant::Int ) );
outputFields = QgsProcessingUtils::combineFields( outputFields, newFields );
QString dest;
std::unique_ptr< QgsFeatureSink > sink( parameterAsSink( parameters, QStringLiteral( "OUTPUT" ), context, dest, outputFields, source->wkbType(), source->sourceCrs() ) );
if ( !sink )
throw QgsProcessingException( invalidSinkError( parameters, QStringLiteral( "OUTPUT" ) ) );
// build spatial index
feedback->pushInfo( QObject::tr( "Building spatial index" ) );
QgsSpatialIndexKDBush index( *source, feedback );
if ( feedback->isCanceled() )
return QVariantMap();
// dbscan!
feedback->pushInfo( QObject::tr( "Analysing clusters" ) );
std::unordered_map< QgsFeatureId, int> idToCluster;
idToCluster.reserve( index.size() );
QgsFeatureIterator features = source->getFeatures( QgsFeatureRequest().setNoAttributes() );
const long featureCount = source->featureCount();
int clusterCount = 0;
dbscan( minSize, eps, borderPointsAreNoise, featureCount, features, index, idToCluster, clusterCount, feedback );
// write clusters
const double writeStep = featureCount > 0 ? 10.0 / featureCount : 1;
features = source->getFeatures();
int i = 0;
QgsFeature feat;
while ( features.nextFeature( feat ) )
{
i++;
if ( feedback->isCanceled() )
{
break;
}
feedback->setProgress( 90 + i * writeStep );
QgsAttributes attr = feat.attributes();
auto cluster = idToCluster.find( feat.id() );
if ( cluster != idToCluster.end() )
{
attr << cluster->second;
}
else
{
attr << QVariant();
}
feat.setAttributes( attr );
sink->addFeature( feat, QgsFeatureSink::FastInsert );
}
QVariantMap outputs;
outputs.insert( QStringLiteral( "OUTPUT" ), dest );
outputs.insert( QStringLiteral( "NUM_CLUSTERS" ), clusterCount );
return outputs;
}
