void QgsPointSample::addSamplePoints( QgsFeature& inputFeature, QgsVectorFileWriter& writer, int nPoints, double minDistance )
{
if ( !inputFeature.constGeometry() )
return;
const QgsGeometry* geom = inputFeature.constGeometry();
QgsRectangle geomRect = geom->boundingBox();
if ( geomRect.isEmpty() )
{
return;
}
QgsSpatialIndex sIndex; //to check minimum distance
QMap< QgsFeatureId, QgsPoint > pointMapForFeature;
int nIterations = 0;
int maxIterations = nPoints * 200;
int points = 0;
double randX = 0;
double randY = 0;
while ( nIterations < maxIterations && points < nPoints )
{
randX = (( double )mt_rand() / MD_RAND_MAX ) * geomRect.width() + geomRect.xMinimum();
randY = (( double )mt_rand() / MD_RAND_MAX ) * geomRect.height() + geomRect.yMinimum();
QgsPoint randPoint( randX, randY );
QgsGeometry* ptGeom = QgsGeometry::fromPoint( randPoint );
if ( ptGeom->within( geom ) && checkMinDistance( randPoint, sIndex, minDistance, pointMapForFeature ) )
{
//add feature to writer
QgsFeature f( mNCreatedPoints );
f.setAttribute( "id", mNCreatedPoints + 1 );
f.setAttribute( "station_id", points + 1 );
f.setAttribute( "stratum_id", inputFeature.id() );
f.setGeometry( ptGeom );
writer.addFeature( f );
sIndex.insertFeature( f );
pointMapForFeature.insert( mNCreatedPoints, randPoint );
++points;
++mNCreatedPoints;
}
else
{
delete ptGeom;
}
++nIterations;
}
}
ErrorList topolTest::checkPolygonContainsPoint( double tolerance, QgsVectorLayer *layer1, QgsVectorLayer *layer2, bool isExtent )
{
Q_UNUSED( tolerance );
Q_UNUSED( isExtent );
int i = 0;
ErrorList errorList;
if ( layer1->geometryType() != QgsWkbTypes::PolygonGeometry )
{
return errorList;
}
if ( layer2->geometryType() != QgsWkbTypes::PointGeometry )
{
return errorList;
}
QgsSpatialIndex *index = mLayerIndexes[layer2->id()];
QList<FeatureLayer>::Iterator it;
for ( it = mFeatureList1.begin(); it != mFeatureList1.end(); ++it )
{
if ( !( ++i % 100 ) )
emit progress( i );
if ( testCanceled() )
break;
QgsGeometry g1 = it->feature.geometry();
QgsRectangle bb = g1.boundingBox();
QList<QgsFeatureId> crossingIds;
crossingIds = index->intersects( bb );
QList<QgsFeatureId>::ConstIterator cit = crossingIds.begin();
QList<QgsFeatureId>::ConstIterator crossingIdsEnd = crossingIds.constEnd();
bool touched = false;
for ( ; cit != crossingIdsEnd; ++cit )
{
QgsFeature &f = mFeatureMap2[*cit].feature;
QgsGeometry g2 = f.geometry();
if ( g2.isNull() || !_canExportToGeos( g2 ) )
{
QgsMessageLog::logMessage( tr( "Second geometry missing or GEOS import failed." ), tr( "Topology plugin" ) );
continue;
}
if ( g1.contains( g2 ) )
{
touched = true;
break;
}
}
if ( !touched )
{
QList<FeatureLayer> fls;
fls << *it << *it;
//bb.scale(10);
TopolErrorPolygonContainsPoint *err = new TopolErrorPolygonContainsPoint( bb, g1, fls );
errorList << err;
}
}
return errorList;
}
bool QgsPointSample::checkMinDistance( QgsPoint& pt, QgsSpatialIndex& index, double minDistance, QMap< QgsFeatureId, QgsPoint >& pointMap )
{
if ( minDistance <= 0 )
{
return true;
}
QList<QgsFeatureId> neighborList = index.nearestNeighbor( pt, 1 );
if ( neighborList.isEmpty() )
{
return true;
}
QMap< QgsFeatureId, QgsPoint >::const_iterator it = pointMap.find( neighborList[0] );
if ( it == pointMap.constEnd() ) //should not happen
{
return true;
}
QgsPoint neighborPt = it.value();
if ( neighborPt.sqrDist( pt ) < ( minDistance * minDistance ) )
{
return false;
}
return true;
}
QgsSpatialIndex *topolTest::createIndex( QgsVectorLayer *layer, const QgsRectangle &extent )
{
QgsSpatialIndex *index = new QgsSpatialIndex();
QgsFeatureIterator fit;
if ( extent.isEmpty() )
{
fit = layer->getFeatures( QgsFeatureRequest().setSubsetOfAttributes( QgsAttributeList() ) );
}
else
{
fit = layer->getFeatures( QgsFeatureRequest()
.setFilterRect( extent )
.setFlags( QgsFeatureRequest::ExactIntersect )
.setSubsetOfAttributes( QgsAttributeList() ) );
}
int i = 0;
QgsFeature f;
while ( fit.nextFeature( f ) )
{
if ( !( ++i % 100 ) )
emit progress( i );
if ( testCanceled() )
{
delete index;
return nullptr;
}
if ( f.hasGeometry() )
{
index->addFeature( f );
mFeatureMap2[f.id()] = FeatureLayer( layer, f );
}
}
return index;
}
static void buildSnapIndex( QgsFeatureIterator &fi, QgsSpatialIndex &index, QVector<AnchorPoint> &pnts, QgsFeedback *feedback, int &count, int totalCount )
{
QgsFeature f;
int pntId = 0;
while ( fi.nextFeature( f ) )
{
if ( feedback->isCanceled() )
break;
QgsGeometry g = f.geometry();
for ( auto it = g.vertices_begin(); it != g.vertices_end(); ++it )
{
QgsPoint pt = *it;
QgsRectangle rect( pt.x(), pt.y(), pt.x(), pt.y() );
QList<QgsFeatureId> ids = index.intersects( rect );
if ( ids.isEmpty() )
{
// add to tree and to structure
index.insertFeature( pntId, pt.boundingBox() );
AnchorPoint xp;
xp.x = pt.x();
xp.y = pt.y();
xp.anchor = -1;
pnts.append( xp );
pntId++;
}
}
++count;
feedback->setProgress( 100. * count / totalCount );
}
}
static void assignAnchors( QgsSpatialIndex &index, QVector<AnchorPoint> &pnts, double thresh )
{
double thresh2 = thresh * thresh;
int nanchors = 0, ntosnap = 0;
for ( int point = 0; point < pnts.count(); ++point )
{
if ( pnts[point].anchor >= 0 )
continue;
pnts[point].anchor = -2; // make it anchor
nanchors++;
// Find points in threshold
double x = pnts[point].x, y = pnts[point].y;
QgsRectangle rect( x - thresh, y - thresh, x + thresh, y + thresh );
const QList<QgsFeatureId> ids = index.intersects( rect );
for ( QgsFeatureId pointb : ids )
{
if ( pointb == point )
continue;
double dx = pnts[pointb].x - pnts[point].x;
double dy = pnts[pointb].y - pnts[point].y;
double dist2 = dx * dx + dy * dy;
if ( dist2 > thresh2 )
continue; // outside threshold
if ( pnts[pointb].anchor == -1 )
{
// doesn't have an anchor yet
pnts[pointb].anchor = point;
ntosnap++;
}
else if ( pnts[pointb].anchor >= 0 )
{
// check distance to previously assigned anchor
double dx2 = pnts[pnts[pointb].anchor].x - pnts[pointb].x;
double dy2 = pnts[pnts[pointb].anchor].y - pnts[pointb].y;
double dist2_a = dx2 * dx2 + dy2 * dy2;
if ( dist2 < dist2_a )
pnts[pointb].anchor = point; // replace old anchor
}
}
}
}
static bool snapPoint( QgsPoint *pt, QgsSpatialIndex &index, QVector<AnchorPoint> &pnts )
{
// Find point ( should always find one point )
QList<QgsFeatureId> fids = index.intersects( QgsRectangle( pt->x(), pt->y(), pt->x(), pt->y() ) );
Q_ASSERT( fids.count() == 1 );
int spoint = fids[0];
int anchor = pnts[spoint].anchor;
if ( anchor >= 0 )
{
// to be snapped
pt->setX( pnts[anchor].x );
pt->setY( pnts[anchor].y );
return true;
}
return false;
}
bool QgsTransectSample::otherTransectWithinDistance( QgsGeometry* geom, double minDistLayerUnit, double minDistance, QgsSpatialIndex& sIndex,
const QMap< QgsFeatureId, QgsGeometry* >& lineFeatureMap, QgsDistanceArea& da )
{
if ( !geom )
{
return false;
}
QgsGeometry* buffer = geom->buffer( minDistLayerUnit, 8 );
if ( !buffer )
{
return false;
}
QgsRectangle rect = buffer->boundingBox();
QList<QgsFeatureId> lineIdList = sIndex.intersects( rect );
QList<QgsFeatureId>::const_iterator lineIdIt = lineIdList.constBegin();
for ( ; lineIdIt != lineIdList.constEnd(); ++lineIdIt )
{
const QMap< QgsFeatureId, QgsGeometry* >::const_iterator idMapIt = lineFeatureMap.find( *lineIdIt );
if ( idMapIt != lineFeatureMap.constEnd() )
{
double dist = 0;
QgsPoint pt1, pt2;
closestSegmentPoints( *geom, *( idMapIt.value() ), dist, pt1, pt2 );
dist = da.measureLine( pt1, pt2 ); //convert degrees to meters if necessary
if ( dist < minDistance )
{
delete buffer;
return true;
}
}
}
delete buffer;
return false;
}
QVariantMap QgsSplitWithLinesAlgorithm::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" ) ) );
std::unique_ptr< QgsFeatureSource > linesSource( parameterAsSource( parameters, QStringLiteral( "LINES" ), context ) );
if ( !linesSource )
throw QgsProcessingException( invalidSourceError( parameters, QStringLiteral( "LINES" ) ) );
bool sameLayer = parameters.value( QStringLiteral( "INPUT" ) ) == parameters.value( QStringLiteral( "LINES" ) );
QString dest;
std::unique_ptr< QgsFeatureSink > sink( parameterAsSink( parameters, QStringLiteral( "OUTPUT" ), context, dest, source->fields(),
QgsWkbTypes::multiType( source->wkbType() ), source->sourceCrs() ) );
if ( !sink )
throw QgsProcessingException( invalidSinkError( parameters, QStringLiteral( "OUTPUT" ) ) );
QgsSpatialIndex spatialIndex;
QMap< QgsFeatureId, QgsGeometry > splitGeoms;
QgsFeatureRequest request;
request.setSubsetOfAttributes( QgsAttributeList() );
request.setDestinationCrs( source->sourceCrs(), context.transformContext() );
QgsFeatureIterator splitLines = linesSource->getFeatures( request );
QgsFeature aSplitFeature;
while ( splitLines.nextFeature( aSplitFeature ) )
{
if ( feedback->isCanceled() )
{
break;
}
splitGeoms.insert( aSplitFeature.id(), aSplitFeature.geometry() );
spatialIndex.addFeature( aSplitFeature );
}
QgsFeature outFeat;
QgsFeatureIterator features = source->getFeatures();
double step = source->featureCount() > 0 ? 100.0 / source->featureCount() : 1;
int i = 0;
QgsFeature inFeatureA;
while ( features.nextFeature( inFeatureA ) )
{
i++;
if ( feedback->isCanceled() )
{
break;
}
if ( !inFeatureA.hasGeometry() )
{
sink->addFeature( inFeatureA, QgsFeatureSink::FastInsert );
continue;
}
QgsGeometry inGeom = inFeatureA.geometry();
outFeat.setAttributes( inFeatureA.attributes() );
QVector< QgsGeometry > inGeoms = inGeom.asGeometryCollection();
const QgsFeatureIds lines = spatialIndex.intersects( inGeom.boundingBox() ).toSet();
if ( !lines.empty() ) // has intersection of bounding boxes
{
QVector< QgsGeometry > splittingLines;
// use prepared geometries for faster intersection tests
std::unique_ptr< QgsGeometryEngine > engine;
for ( QgsFeatureId line : lines )
{
// check if trying to self-intersect
if ( sameLayer && inFeatureA.id() == line )
continue;
QgsGeometry splitGeom = splitGeoms.value( line );
if ( !engine )
{
engine.reset( QgsGeometry::createGeometryEngine( inGeom.constGet() ) );
engine->prepareGeometry();
}
if ( engine->intersects( splitGeom.constGet() ) )
{
QVector< QgsGeometry > splitGeomParts = splitGeom.asGeometryCollection();
splittingLines.append( splitGeomParts );
}
}
if ( !splittingLines.empty() )
{
for ( const QgsGeometry &splitGeom : qgis::as_const( splittingLines ) )
{
QVector<QgsPointXY> splitterPList;
QVector< QgsGeometry > outGeoms;
// use prepared geometries for faster intersection tests
std::unique_ptr< QgsGeometryEngine > splitGeomEngine( QgsGeometry::createGeometryEngine( splitGeom.constGet() ) );
splitGeomEngine->prepareGeometry();
while ( !inGeoms.empty() )
{
if ( feedback->isCanceled() )
{
break;
}
QgsGeometry inGeom = inGeoms.takeFirst();
if ( !inGeom )
continue;
if ( splitGeomEngine->intersects( inGeom.constGet() ) )
{
QgsGeometry before = inGeom;
if ( splitterPList.empty() )
{
const QgsCoordinateSequence sequence = splitGeom.constGet()->coordinateSequence();
for ( const QgsRingSequence &part : sequence )
{
for ( const QgsPointSequence &ring : part )
{
for ( const QgsPoint &pt : ring )
{
splitterPList << QgsPointXY( pt );
}
}
}
}
QVector< QgsGeometry > newGeometries;
QVector<QgsPointXY> topologyTestPoints;
QgsGeometry::OperationResult result = inGeom.splitGeometry( splitterPList, newGeometries, false, topologyTestPoints );
// splitGeometry: If there are several intersections
// between geometry and splitLine, only the first one is considered.
if ( result == QgsGeometry::Success ) // split occurred
{
if ( inGeom.isGeosEqual( before ) )
{
// bug in splitGeometry: sometimes it returns 0 but
// the geometry is unchanged
outGeoms.append( inGeom );
}
else
{
inGeoms.append( inGeom );
inGeoms.append( newGeometries );
}
}
else
{
outGeoms.append( inGeom );
}
}
else
{
outGeoms.append( inGeom );
}
}
inGeoms = outGeoms;
}
}
}
QVector< QgsGeometry > parts;
for ( const QgsGeometry &aGeom : qgis::as_const( inGeoms ) )
{
if ( feedback->isCanceled() )
{
break;
}
bool passed = true;
if ( QgsWkbTypes::geometryType( aGeom.wkbType() ) == QgsWkbTypes::LineGeometry )
{
int numPoints = aGeom.constGet()->nCoordinates();
if ( numPoints <= 2 )
{
if ( numPoints == 2 )
passed = !static_cast< const QgsCurve * >( aGeom.constGet() )->isClosed(); // tests if vertex 0 = vertex 1
else
passed = false; // sometimes splitting results in lines of zero length
}
}
if ( passed )
parts.append( aGeom );
}
for ( const QgsGeometry &g : parts )
{
outFeat.setGeometry( g );
sink->addFeature( outFeat, QgsFeatureSink::FastInsert );
}
feedback->setProgress( i * step );
}
QVariantMap outputs;
outputs.insert( QStringLiteral( "OUTPUT" ), dest );
return outputs;
}
void QgsOverlayUtils::resolveOverlaps( const QgsFeatureSource &source, QgsFeatureSink &sink, QgsProcessingFeedback *feedback )
{
int count = 0;
int totalCount = source.featureCount();
if ( totalCount == 0 )
return; // nothing to do here
QgsFeatureId newFid = -1;
QgsWkbTypes::GeometryType geometryType = QgsWkbTypes::geometryType( QgsWkbTypes::multiType( source.wkbType() ) );
QgsFeatureRequest requestOnlyGeoms;
requestOnlyGeoms.setSubsetOfAttributes( QgsAttributeList() );
QgsFeatureRequest requestOnlyAttrs;
requestOnlyAttrs.setFlags( QgsFeatureRequest::NoGeometry );
QgsFeatureRequest requestOnlyIds;
requestOnlyIds.setFlags( QgsFeatureRequest::NoGeometry );
requestOnlyIds.setSubsetOfAttributes( QgsAttributeList() );
// make a set of used feature IDs so that we do not try to reuse them for newly added features
QgsFeature f;
QSet<QgsFeatureId> fids;
QgsFeatureIterator it = source.getFeatures( requestOnlyIds );
while ( it.nextFeature( f ) )
{
if ( feedback->isCanceled() )
return;
fids.insert( f.id() );
}
QHash<QgsFeatureId, QgsGeometry> geometries;
QgsSpatialIndex index;
QHash<QgsFeatureId, QList<QgsFeatureId> > intersectingIds; // which features overlap a particular area
// resolve intersections
it = source.getFeatures( requestOnlyGeoms );
while ( it.nextFeature( f ) )
{
if ( feedback->isCanceled() )
return;
QgsFeatureId fid1 = f.id();
QgsGeometry g1 = f.geometry();
std::unique_ptr< QgsGeometryEngine > g1engine;
geometries.insert( fid1, g1 );
index.insertFeature( f );
QgsRectangle bbox( f.geometry().boundingBox() );
const QList<QgsFeatureId> ids = index.intersects( bbox );
for ( QgsFeatureId fid2 : ids )
{
if ( fid1 == fid2 )
continue;
if ( !g1engine )
{
// use prepared geometries for faster intersection tests
g1engine.reset( QgsGeometry::createGeometryEngine( g1.constGet() ) );
g1engine->prepareGeometry();
}
QgsGeometry g2 = geometries.value( fid2 );
if ( !g1engine->intersects( g2.constGet() ) )
continue;
QgsGeometry geomIntersection = g1.intersection( g2 );
if ( !sanitizeIntersectionResult( geomIntersection, geometryType ) )
continue;
//
// add intersection geometry
//
// figure out new fid
while ( fids.contains( newFid ) )
--newFid;
fids.insert( newFid );
geometries.insert( newFid, geomIntersection );
QgsFeature fx( newFid );
fx.setGeometry( geomIntersection );
index.insertFeature( fx );
// figure out which feature IDs belong to this intersection. Some of the IDs can be of the newly
// created geometries - in such case we need to retrieve original IDs
QList<QgsFeatureId> lst;
if ( intersectingIds.contains( fid1 ) )
lst << intersectingIds.value( fid1 );
else
lst << fid1;
if ( intersectingIds.contains( fid2 ) )
lst << intersectingIds.value( fid2 );
else
lst << fid2;
intersectingIds.insert( newFid, lst );
//
// update f1
//
QgsGeometry g12 = g1.difference( g2 );
index.deleteFeature( f );
geometries.remove( fid1 );
if ( sanitizeDifferenceResult( g12 ) )
{
geometries.insert( fid1, g12 );
QgsFeature f1x( fid1 );
f1x.setGeometry( g12 );
index.insertFeature( f1x );
}
//
// update f2
//
QgsGeometry g21 = g2.difference( g1 );
QgsFeature f2old( fid2 );
f2old.setGeometry( g2 );
index.deleteFeature( f2old );
geometries.remove( fid2 );
if ( sanitizeDifferenceResult( g21 ) )
{
geometries.insert( fid2, g21 );
QgsFeature f2x( fid2 );
f2x.setGeometry( g21 );
index.insertFeature( f2x );
}
// update our temporary copy of the geometry to what is left from it
g1 = g12;
g1engine.reset();
}
++count;
feedback->setProgress( count / ( double ) totalCount * 100. );
}
// release some memory of structures we don't need anymore
fids.clear();
index = QgsSpatialIndex();
// load attributes
QHash<QgsFeatureId, QgsAttributes> attributesHash;
it = source.getFeatures( requestOnlyAttrs );
while ( it.nextFeature( f ) )
{
if ( feedback->isCanceled() )
return;
attributesHash.insert( f.id(), f.attributes() );
}
// store stuff in the sink
for ( auto i = geometries.constBegin(); i != geometries.constEnd(); ++i )
{
if ( feedback->isCanceled() )
return;
QgsFeature outFeature( i.key() );
outFeature.setGeometry( i.value() );
if ( intersectingIds.contains( i.key() ) )
{
const QList<QgsFeatureId> ids = intersectingIds.value( i.key() );
for ( QgsFeatureId id : ids )
{
outFeature.setAttributes( attributesHash.value( id ) );
sink.addFeature( outFeature, QgsFeatureSink::FastInsert );
}
}
else
{
outFeature.setAttributes( attributesHash.value( i.key() ) );
sink.addFeature( outFeature, QgsFeatureSink::FastInsert );
}
}
}
int QgsTransectSample::createSample( QProgressDialog* pd )
{
Q_UNUSED( pd );
if ( !mStrataLayer || !mStrataLayer->isValid() )
{
return 1;
}
if ( !mBaselineLayer || !mBaselineLayer->isValid() )
{
return 2;
}
//stratum id is not necessarily an integer
QVariant::Type stratumIdType = QVariant::Int;
if ( !mStrataIdAttribute.isEmpty() )
{
stratumIdType = mStrataLayer->pendingFields().field( mStrataIdAttribute ).type();
}
//create vector file writers for output
QgsFields outputPointFields;
outputPointFields.append( QgsField( "id", stratumIdType ) );
outputPointFields.append( QgsField( "station_id", QVariant::Int ) );
outputPointFields.append( QgsField( "stratum_id", stratumIdType ) );
outputPointFields.append( QgsField( "station_code", QVariant::String ) );
outputPointFields.append( QgsField( "start_lat", QVariant::Double ) );
outputPointFields.append( QgsField( "start_long", QVariant::Double ) );
QgsVectorFileWriter outputPointWriter( mOutputPointLayer, "utf-8", outputPointFields, QGis::WKBPoint,
&( mStrataLayer->crs() ) );
if ( outputPointWriter.hasError() != QgsVectorFileWriter::NoError )
{
return 3;
}
outputPointFields.append( QgsField( "bearing", QVariant::Double ) ); //add bearing attribute for lines
QgsVectorFileWriter outputLineWriter( mOutputLineLayer, "utf-8", outputPointFields, QGis::WKBLineString,
&( mStrataLayer->crs() ) );
if ( outputLineWriter.hasError() != QgsVectorFileWriter::NoError )
{
return 4;
}
QgsFields usedBaselineFields;
usedBaselineFields.append( QgsField( "stratum_id", stratumIdType ) );
usedBaselineFields.append( QgsField( "ok", QVariant::String ) );
QgsVectorFileWriter usedBaselineWriter( mUsedBaselineLayer, "utf-8", usedBaselineFields, QGis::WKBLineString,
&( mStrataLayer->crs() ) );
if ( usedBaselineWriter.hasError() != QgsVectorFileWriter::NoError )
{
return 5;
}
//debug: write clipped buffer bounds with stratum id to same directory as out_point
QFileInfo outputPointInfo( mOutputPointLayer );
QString bufferClipLineOutput = outputPointInfo.absolutePath() + "/out_buffer_clip_line.shp";
QgsFields bufferClipLineFields;
bufferClipLineFields.append( QgsField( "id", stratumIdType ) );
QgsVectorFileWriter bufferClipLineWriter( bufferClipLineOutput, "utf-8", bufferClipLineFields, QGis::WKBLineString, &( mStrataLayer->crs() ) );
//configure distanceArea depending on minDistance units and output CRS
QgsDistanceArea distanceArea;
distanceArea.setSourceCrs( mStrataLayer->crs().srsid() );
if ( mMinDistanceUnits == Meters )
{
distanceArea.setEllipsoidalMode( true );
}
else
{
distanceArea.setEllipsoidalMode( false );
}
//possibility to transform output points to lat/long
QgsCoordinateTransform toLatLongTransform( mStrataLayer->crs(), QgsCoordinateReferenceSystem( 4326, QgsCoordinateReferenceSystem::EpsgCrsId ) );
//init random number generator
mt_srand( QTime::currentTime().msec() );
QgsFeatureRequest fr;
fr.setSubsetOfAttributes( QStringList() << mStrataIdAttribute << mMinDistanceAttribute << mNPointsAttribute, mStrataLayer->pendingFields() );
QgsFeatureIterator strataIt = mStrataLayer->getFeatures( fr );
QgsFeature fet;
int nTotalTransects = 0;
int nFeatures = 0;
if ( pd )
{
pd->setMaximum( mStrataLayer->featureCount() );
}
while ( strataIt.nextFeature( fet ) )
{
if ( pd )
{
pd->setValue( nFeatures );
}
if ( pd && pd->wasCanceled() )
{
break;
}
if ( !fet.constGeometry() )
{
continue;
}
const QgsGeometry* strataGeom = fet.constGeometry();
//find baseline for strata
QVariant strataId = fet.attribute( mStrataIdAttribute );
QgsGeometry* baselineGeom = findBaselineGeometry( strataId.isValid() ? strataId : -1 );
if ( !baselineGeom )
{
continue;
}
double minDistance = fet.attribute( mMinDistanceAttribute ).toDouble();
double minDistanceLayerUnits = minDistance;
//if minDistance is in meters and the data in degrees, we need to apply a rough conversion for the buffer distance
double bufferDist = bufferDistance( minDistance );
if ( mMinDistanceUnits == Meters && mStrataLayer->crs().mapUnits() == QGis::DecimalDegrees )
{
minDistanceLayerUnits = minDistance / 111319.9;
}
QgsGeometry* clippedBaseline = strataGeom->intersection( baselineGeom );
if ( !clippedBaseline || clippedBaseline->wkbType() == QGis::WKBUnknown )
{
delete clippedBaseline;
continue;
}
QgsGeometry* bufferLineClipped = clipBufferLine( strataGeom, clippedBaseline, bufferDist );
if ( !bufferLineClipped )
{
delete clippedBaseline;
continue;
}
//save clipped baseline to file
QgsFeature blFeature;
blFeature.setGeometry( *clippedBaseline );
blFeature.setAttribute( "stratum_id", strataId );
blFeature.setAttribute( "ok", "f" );
usedBaselineWriter.addFeature( blFeature );
//start loop to create random points along the baseline
int nTransects = fet.attribute( mNPointsAttribute ).toInt();
int nCreatedTransects = 0;
int nIterations = 0;
int nMaxIterations = nTransects * 50;
QgsSpatialIndex sIndex; //to check minimum distance
QMap< QgsFeatureId, QgsGeometry* > lineFeatureMap;
while ( nCreatedTransects < nTransects && nIterations < nMaxIterations )
{
double randomPosition = (( double )mt_rand() / MD_RAND_MAX ) * clippedBaseline->length();
QgsGeometry* samplePoint = clippedBaseline->interpolate( randomPosition );
++nIterations;
if ( !samplePoint )
{
continue;
}
QgsPoint sampleQgsPoint = samplePoint->asPoint();
QgsPoint latLongSamplePoint = toLatLongTransform.transform( sampleQgsPoint );
QgsFeature samplePointFeature;
samplePointFeature.setGeometry( samplePoint );
samplePointFeature.setAttribute( "id", nTotalTransects + 1 );
samplePointFeature.setAttribute( "station_id", nCreatedTransects + 1 );
samplePointFeature.setAttribute( "stratum_id", strataId );
samplePointFeature.setAttribute( "station_code", strataId.toString() + "_" + QString::number( nCreatedTransects + 1 ) );
samplePointFeature.setAttribute( "start_lat", latLongSamplePoint.y() );
samplePointFeature.setAttribute( "start_long", latLongSamplePoint.x() );
//find closest point on clipped buffer line
QgsPoint minDistPoint;
int afterVertex;
if ( bufferLineClipped->closestSegmentWithContext( sampleQgsPoint, minDistPoint, afterVertex ) < 0 )
{
continue;
}
//bearing between sample point and min dist point (transect direction)
double bearing = distanceArea.bearing( sampleQgsPoint, minDistPoint ) / M_PI * 180.0;
QgsPolyline sampleLinePolyline;
QgsPoint ptFarAway( sampleQgsPoint.x() + ( minDistPoint.x() - sampleQgsPoint.x() ) * 1000000,
sampleQgsPoint.y() + ( minDistPoint.y() - sampleQgsPoint.y() ) * 1000000 );
QgsPolyline lineFarAway;
lineFarAway << sampleQgsPoint << ptFarAway;
QgsGeometry* lineFarAwayGeom = QgsGeometry::fromPolyline( lineFarAway );
QgsGeometry* lineClipStratum = lineFarAwayGeom->intersection( strataGeom );
if ( !lineClipStratum )
{
delete lineFarAwayGeom; delete lineClipStratum;
continue;
}
//cancel if distance between sample point and line is too large (line does not start at point
if ( lineClipStratum->distance( *samplePoint ) > 0.000001 )
{
delete lineFarAwayGeom; delete lineClipStratum;
continue;
}
//if lineClipStratum is a multiline, take the part line closest to sampleQgsPoint
if ( lineClipStratum->wkbType() == QGis::WKBMultiLineString
|| lineClipStratum->wkbType() == QGis::WKBMultiLineString25D )
{
QgsGeometry* singleLine = closestMultilineElement( sampleQgsPoint, lineClipStratum );
if ( singleLine )
{
delete lineClipStratum;
lineClipStratum = singleLine;
}
}
//cancel if length of lineClipStratum is too small
double transectLength = distanceArea.measure( lineClipStratum );
if ( transectLength < mMinTransectLength )
{
delete lineFarAwayGeom; delete lineClipStratum;
continue;
}
//search closest existing profile. Cancel if dist < minDist
if ( otherTransectWithinDistance( lineClipStratum, minDistanceLayerUnits, minDistance, sIndex, lineFeatureMap, distanceArea ) )
{
delete lineFarAwayGeom; delete lineClipStratum;
continue;
}
QgsFeatureId fid( nCreatedTransects );
QgsFeature sampleLineFeature( fid );
sampleLineFeature.setGeometry( lineClipStratum );
sampleLineFeature.setAttribute( "id", nTotalTransects + 1 );
sampleLineFeature.setAttribute( "station_id", nCreatedTransects + 1 );
sampleLineFeature.setAttribute( "stratum_id", strataId );
sampleLineFeature.setAttribute( "station_code", strataId.toString() + "_" + QString::number( nCreatedTransects + 1 ) );
sampleLineFeature.setAttribute( "start_lat", latLongSamplePoint.y() );
sampleLineFeature.setAttribute( "start_long", latLongSamplePoint.x() );
sampleLineFeature.setAttribute( "bearing", bearing );
outputLineWriter.addFeature( sampleLineFeature );
//add point to file writer here.
//It can only be written if the corresponding transect has been as well
outputPointWriter.addFeature( samplePointFeature );
sIndex.insertFeature( sampleLineFeature );
Q_NOWARN_DEPRECATED_PUSH
lineFeatureMap.insert( fid, sampleLineFeature.geometryAndOwnership() );
Q_NOWARN_DEPRECATED_POP
delete lineFarAwayGeom;
++nTotalTransects;
++nCreatedTransects;
}
delete clippedBaseline;
QgsFeature bufferClipFeature;
bufferClipFeature.setGeometry( bufferLineClipped );
bufferClipFeature.setAttribute( "id", strataId );
bufferClipLineWriter.addFeature( bufferClipFeature );
//delete bufferLineClipped;
//delete all line geometries in spatial index
QMap< QgsFeatureId, QgsGeometry* >::iterator featureMapIt = lineFeatureMap.begin();
for ( ; featureMapIt != lineFeatureMap.end(); ++featureMapIt )
{
delete( featureMapIt.value() );
}
lineFeatureMap.clear();
delete baselineGeom;
++nFeatures;
}
if ( pd )
{
pd->setValue( mStrataLayer->featureCount() );
}
return 0;
}
ErrorList topolTest::checkPointCoveredByLineEnds( QgsVectorLayer *layer1, QgsVectorLayer *layer2, bool isExtent )
{
int i = 0;
ErrorList errorList;
if ( layer1->geometryType() != QgsWkbTypes::PointGeometry )
{
return errorList;
}
if ( layer2->geometryType() != QgsWkbTypes::LineGeometry )
{
return errorList;
}
QgsSpatialIndex *index = mLayerIndexes[layer2->id()];
QgsGeometry canvasExtentPoly = QgsGeometry::fromWkt( qgsInterface->mapCanvas()->extent().asWktPolygon() );
QList<FeatureLayer>::Iterator it;
for ( it = mFeatureList1.begin(); it != mFeatureList1.end(); ++it )
{
if ( !( ++i % 100 ) )
emit progress( i );
if ( testCanceled() )
break;
QgsGeometry g1 = it->feature.geometry();
QgsRectangle bb = g1.boundingBox();
QList<QgsFeatureId> crossingIds;
crossingIds = index->intersects( bb );
QList<QgsFeatureId>::ConstIterator cit = crossingIds.constBegin();
QList<QgsFeatureId>::ConstIterator crossingIdsEnd = crossingIds.constEnd();
bool touched = false;
for ( ; cit != crossingIdsEnd; ++cit )
{
QgsFeature &f = mFeatureMap2[*cit].feature;
QgsGeometry g2 = f.geometry();
if ( g2.isNull() || !_canExportToGeos( g2 ) )
{
QgsMessageLog::logMessage( tr( "Second geometry missing or GEOS import failed." ), tr( "Topology plugin" ) );
continue;
}
QgsPolylineXY g2Line = g2.asPolyline();
QgsGeometry startPoint = QgsGeometry::fromPointXY( g2Line.at( 0 ) );
QgsGeometry endPoint = QgsGeometry::fromPointXY( g2Line.last() );
touched = g1.intersects( startPoint ) || g1.intersects( endPoint );
if ( touched )
{
break;
}
}
if ( !touched )
{
QgsGeometry conflictGeom = g1;
if ( isExtent )
{
if ( canvasExtentPoly.disjoint( conflictGeom ) )
{
continue;
}
}
QList<FeatureLayer> fls;
fls << *it << *it;
//bb.scale(10);
TopolErrorPointNotCoveredByLineEnds *err = new TopolErrorPointNotCoveredByLineEnds( bb, conflictGeom, fls );
errorList << err;
}
}
return errorList;
}
ErrorList topolTest::checkOverlapWithLayer( QgsVectorLayer *layer1, QgsVectorLayer *layer2, bool isExtent )
{
int i = 0;
ErrorList errorList;
bool skipItself = layer1 == layer2;
QgsSpatialIndex *index = mLayerIndexes[layer2->id()];
QgsGeometry canvasExtentPoly = QgsGeometry::fromWkt( qgsInterface->mapCanvas()->extent().asWktPolygon() );
QList<FeatureLayer>::iterator it;
for ( it = mFeatureList1.begin(); it != mFeatureList1.end(); ++it )
{
if ( !( ++i % 100 ) )
emit progress( i );
if ( testCanceled() )
break;
QgsGeometry g1 = it->feature.geometry();
QgsRectangle bb = g1.boundingBox();
QList<QgsFeatureId> crossingIds;
crossingIds = index->intersects( bb );
QList<QgsFeatureId>::ConstIterator cit = crossingIds.begin();
QList<QgsFeatureId>::ConstIterator crossingIdsEnd = crossingIds.end();
for ( ; cit != crossingIdsEnd; ++cit )
{
QgsFeature &f = mFeatureMap2[*cit].feature;
QgsGeometry g2 = f.geometry();
// skip itself, when invoked with the same layer
if ( skipItself && f.id() == it->feature.id() )
continue;
if ( g2.isNull() )
{
QgsMessageLog::logMessage( tr( "Second geometry missing." ), tr( "Topology plugin" ) );
continue;
}
if ( g1.overlaps( g2 ) )
{
QgsRectangle r = bb;
QgsRectangle r2 = g2.boundingBox();
r.combineExtentWith( r2 );
QgsGeometry conflictGeom = g1.intersection( g2 );
// could this for some reason return NULL?
if ( conflictGeom.isNull() )
{
continue;
}
if ( isExtent )
{
if ( canvasExtentPoly.disjoint( conflictGeom ) )
{
continue;
}
if ( canvasExtentPoly.crosses( conflictGeom ) )
{
conflictGeom = conflictGeom.intersection( canvasExtentPoly );
}
}
//c = new QgsGeometry;
QList<FeatureLayer> fls;
FeatureLayer fl;
fl.feature = f;
fl.layer = layer2;
fls << *it << fl;
TopolErrorIntersection *err = new TopolErrorIntersection( r, conflictGeom, fls );
errorList << err;
}
}
}
return errorList;
}
ErrorList topolTest::checkPointCoveredBySegment( QgsVectorLayer *layer1, QgsVectorLayer *layer2, bool isExtent )
{
int i = 0;
ErrorList errorList;
if ( layer1->geometryType() != QgsWkbTypes::PointGeometry )
{
return errorList;
}
if ( layer2->geometryType() == QgsWkbTypes::PointGeometry )
{
return errorList;
}
QgsSpatialIndex *index = mLayerIndexes[layer2->id()];
QgsGeometry canvasExtentPoly = QgsGeometry::fromWkt( qgsInterface->mapCanvas()->extent().asWktPolygon() );
QList<FeatureLayer>::Iterator it;
for ( it = mFeatureList1.begin(); it != mFeatureList1.end(); ++it )
{
if ( !( ++i % 100 ) )
emit progress( i );
if ( testCanceled() )
break;
QgsGeometry g1 = it->feature.geometry();
QgsRectangle bb = g1.boundingBox();
QList<QgsFeatureId> crossingIds;
crossingIds = index->intersects( bb );
QList<QgsFeatureId>::ConstIterator cit = crossingIds.begin();
QList<QgsFeatureId>::ConstIterator crossingIdsEnd = crossingIds.end();
bool touched = false;
for ( ; cit != crossingIdsEnd; ++cit )
{
QgsFeature &f = mFeatureMap2[*cit].feature;
QgsGeometry g2 = f.geometry();
if ( g2.isNull() )
{
QgsMessageLog::logMessage( tr( "Invalid geometry in covering test." ), tr( "Topology plugin" ) );
continue;
}
// test if point touches other geometry
if ( g1.touches( g2 ) )
{
touched = true;
break;
}
}
if ( !touched )
{
QgsGeometry conflictGeom = QgsGeometry( g1 );
if ( isExtent )
{
if ( canvasExtentPoly.disjoint( conflictGeom ) )
{
continue;
}
}
QList<FeatureLayer> fls;
fls << *it << *it;
//bb.scale(10);
TopolErrorCovered *err = new TopolErrorCovered( bb, conflictGeom, fls );
errorList << err;
}
}
return errorList;
}
ErrorList topolTest::checkOverlaps( QgsVectorLayer *layer1, QgsVectorLayer *layer2, bool isExtent )
{
Q_UNUSED( layer2 );
int i = 0;
ErrorList errorList;
// could be enabled for lines and points too
// so duplicate rule may be removed?
if ( layer1->geometryType() != QgsWkbTypes::PolygonGeometry )
{
return errorList;
}
QList<QgsFeatureId> *duplicateIds = new QList<QgsFeatureId>();
QgsSpatialIndex *index = mLayerIndexes[layer1->id()];
if ( !index )
{
qDebug() << "no index present";
delete duplicateIds;
return errorList;
}
QMap<QgsFeatureId, FeatureLayer>::const_iterator it;
for ( it = mFeatureMap2.constBegin(); it != mFeatureMap2.constEnd(); ++it )
{
if ( !( ++i % 100 ) )
emit progress( i );
QgsFeatureId currentId = it->feature.id();
if ( duplicateIds->contains( currentId ) )
{
//is already a duplicate geometry..skip..
continue;
}
if ( testCanceled() )
break;
QgsGeometry g1 = it->feature.geometry();
if ( !g1.isGeosValid() )
{
qDebug() << "invalid geometry(g1) found..skipping.." << it->feature.id();
continue;
}
QgsRectangle bb = g1.boundingBox();
QList<QgsFeatureId> crossingIds;
crossingIds = index->intersects( bb );
QList<QgsFeatureId>::ConstIterator cit = crossingIds.begin();
QList<QgsFeatureId>::ConstIterator crossingIdsEnd = crossingIds.end();
bool duplicate = false;
QgsGeometry canvasExtentPoly = QgsGeometry::fromWkt( qgsInterface->mapCanvas()->extent().asWktPolygon() );
for ( ; cit != crossingIdsEnd; ++cit )
{
duplicate = false;
// skip itself
if ( mFeatureMap2[*cit].feature.id() == it->feature.id() )
continue;
QgsGeometry g2 = mFeatureMap2[*cit].feature.geometry();
if ( g2.isNull() )
{
QgsMessageLog::logMessage( tr( "Invalid second geometry in overlaps test." ), tr( "Topology plugin" ) );
continue;
}
if ( !_canExportToGeos( g2 ) )
{
QgsMessageLog::logMessage( tr( "Failed to import second geometry into GEOS in overlaps test." ), tr( "Topology plugin" ) );
continue;
}
if ( !g2.isGeosValid() )
{
QgsMessageLog::logMessage( tr( "Skipping invalid second geometry of feature %1 in overlaps test." ).arg( it->feature.id() ), tr( "Topology plugin" ) );
continue;
}
qDebug() << "checking overlap for" << it->feature.id();
if ( g1.overlaps( g2 ) )
{
duplicate = true;
duplicateIds->append( mFeatureMap2[*cit].feature.id() );
}
if ( duplicate )
{
QList<FeatureLayer> fls;
fls << *it << *it;
QgsGeometry conflictGeom = g1.intersection( g2 );
if ( isExtent )
{
if ( canvasExtentPoly.disjoint( conflictGeom ) )
{
continue;
}
if ( canvasExtentPoly.crosses( conflictGeom ) )
{
conflictGeom = conflictGeom.intersection( canvasExtentPoly );
}
}
TopolErrorOverlaps *err = new TopolErrorOverlaps( bb, conflictGeom, fls );
errorList << err;
}
}
}
delete duplicateIds;
return errorList;
}
bool QgsOverlayAnalyzer::intersection( QgsVectorLayer* layerA, QgsVectorLayer* layerB,
const QString& shapefileName, bool onlySelectedFeatures,
QProgressDialog* p )
{
if ( !layerA && !layerB )
{
return false;
}
QgsVectorDataProvider* dpA = layerA->dataProvider();
QgsVectorDataProvider* dpB = layerB->dataProvider();
if ( !dpA && !dpB )
{
return false;
}
QGis::WkbType outputType = dpA->geometryType();
const QgsCoordinateReferenceSystem crs = layerA->srs();
QgsFieldMap fieldsA = dpA->fields();
QgsFieldMap fieldsB = dpB->fields();
combineFieldLists( fieldsA, fieldsB );
QgsVectorFileWriter vWriter( shapefileName, dpA->encoding(), fieldsA, outputType, &crs );
QgsFeature currentFeature;
QgsSpatialIndex index;
//take only selection
if ( onlySelectedFeatures )
{
const QgsFeatureIds selectionB = layerB->selectedFeaturesIds();
QgsFeatureIds::const_iterator it = selectionB.constBegin();
for ( ; it != selectionB.constEnd(); ++it )
{
if ( !layerB->featureAtId( *it, currentFeature, true, true ) )
{
continue;
}
index.insertFeature( currentFeature );
}
//use QgsVectorLayer::featureAtId
const QgsFeatureIds selectionA = layerA->selectedFeaturesIds();
if ( p )
{
p->setMaximum( selectionA.size() );
}
QgsFeature currentFeature;
int processedFeatures = 0;
it = selectionA.constBegin();
for ( ; it != selectionA.constEnd(); ++it )
{
if ( p )
{
p->setValue( processedFeatures );
}
if ( p && p->wasCanceled() )
{
break;
}
if ( !layerA->featureAtId( *it, currentFeature, true, true ) )
{
continue;
}
intersectFeature( currentFeature, &vWriter, layerB, &index );
++processedFeatures;
}
if ( p )
{
p->setValue( selectionA.size() );
}
}
//take all features
else
{
layerB->select( layerB->pendingAllAttributesList(), QgsRectangle(), true, false );
while ( layerB->nextFeature( currentFeature ) )
{
index.insertFeature( currentFeature );
}
QgsFeature currentFeature;
layerA->select( layerA->pendingAllAttributesList(), QgsRectangle(), true, false );
int featureCount = layerA->featureCount();
if ( p )
{
p->setMaximum( featureCount );
}
int processedFeatures = 0;
while ( layerA->nextFeature( currentFeature ) )
{
if ( p )
{
p->setValue( processedFeatures );
}
if ( p && p->wasCanceled() )
{
break;
}
intersectFeature( currentFeature, &vWriter, layerB, &index );
++processedFeatures;
}
if ( p )
{
p->setValue( featureCount );
}
}
return true;
}
static bool snapLineString( QgsLineString *linestring, QgsSpatialIndex &index, QVector<AnchorPoint> &pnts, double thresh )
{
QVector<QgsPoint> newPoints;
QVector<int> anchors; // indexes of anchors for vertices
double thresh2 = thresh * thresh;
double minDistX, minDistY; // coordinates of the closest point on the segment line
bool changed = false;
// snap vertices
for ( int v = 0; v < linestring->numPoints(); v++ )
{
double x = linestring->xAt( v );
double y = linestring->yAt( v );
QgsRectangle rect( x, y, x, y );
// Find point ( should always find one point )
QList<QgsFeatureId> fids = index.intersects( rect );
Q_ASSERT( fids.count() == 1 );
int spoint = fids.first();
int anchor = pnts[spoint].anchor;
if ( anchor >= 0 )
{
// to be snapped
linestring->setXAt( v, pnts[anchor].x );
linestring->setYAt( v, pnts[anchor].y );
anchors.append( anchor ); // point on new location
changed = true;
}
else
{
anchors.append( spoint ); // old point
}
}
// Snap all segments to anchors in threshold
for ( int v = 0; v < linestring->numPoints() - 1; v++ )
{
double x1 = linestring->xAt( v );
double x2 = linestring->xAt( v + 1 );
double y1 = linestring->yAt( v );
double y2 = linestring->yAt( v + 1 );
newPoints << linestring->pointN( v );
// Box
double xmin = x1, xmax = x2, ymin = y1, ymax = y2;
if ( xmin > xmax )
std::swap( xmin, xmax );
if ( ymin > ymax )
std::swap( ymin, ymax );
QgsRectangle rect( xmin - thresh, ymin - thresh, xmax + thresh, ymax + thresh );
// Find points
const QList<QgsFeatureId> fids = index.intersects( rect );
QVector<AnchorAlongSegment> newVerticesAlongSegment;
// Snap to anchor in threshold different from end points
for ( QgsFeatureId fid : fids )
{
int spoint = fid;
if ( spoint == anchors[v] || spoint == anchors[v + 1] )
continue; // end point
if ( pnts[spoint].anchor >= 0 )
continue; // point is not anchor
// Check the distance
double dist2 = QgsGeometryUtils::sqrDistToLine( pnts[spoint].x, pnts[spoint].y, x1, y1, x2, y2, minDistX, minDistY, 0 );
// skip points that are behind segment's endpoints or extremely close to them
double dx1 = minDistX - x1, dx2 = minDistX - x2;
double dy1 = minDistY - y1, dy2 = minDistY - y2;
bool isOnSegment = !qgsDoubleNear( dx1 * dx1 + dy1 * dy1, 0 ) && !qgsDoubleNear( dx2 * dx2 + dy2 * dy2, 0 );
if ( isOnSegment && dist2 <= thresh2 )
{
// an anchor is in the threshold
AnchorAlongSegment item;
item.anchor = spoint;
item.along = QgsPointXY( x1, y1 ).distance( minDistX, minDistY );
newVerticesAlongSegment << item;
}
}
if ( !newVerticesAlongSegment.isEmpty() )
{
// sort by distance along the segment
std::sort( newVerticesAlongSegment.begin(), newVerticesAlongSegment.end(), []( const AnchorAlongSegment & p1, const AnchorAlongSegment & p2 )
{
return ( p1.along < p2.along ? -1 : ( p1.along > p2.along ) );
} );
// insert new vertices
for ( int i = 0; i < newVerticesAlongSegment.count(); i++ )
{
int anchor = newVerticesAlongSegment[i].anchor;
newPoints << QgsPoint( pnts[anchor].x, pnts[anchor].y, 0 );
}
changed = true;
}
}
// append end point
newPoints << linestring->pointN( linestring->numPoints() - 1 );
// replace linestring's points
if ( changed )
linestring->setPoints( newPoints );
return changed;
}
void QgsPointDisplacementRenderer::createDisplacementGroups( QgsVectorLayer* vlayer, const QgsRectangle& viewExtent )
{
if ( !vlayer || ( vlayer->wkbType() != QGis::WKBPoint && vlayer->wkbType() != QGis::WKBPoint25D ) )
{
return;
}
mDisplacementGroups.clear();
mDisplacementIds.clear();
//use a spatial index to check if there is already a point at a position
QgsSpatialIndex spatialIndex;
//attributes
QgsAttributeList attList;
QList<QString> attributeStrings = usedAttributes();
QList<QString>::const_iterator attStringIt = attributeStrings.constBegin();
for ( ; attStringIt != attributeStrings.constEnd(); ++attStringIt )
{
attList.push_back( vlayer->fieldNameIndex( *attStringIt ) );
}
QgsFeature f;
QList<int> intersectList;
vlayer->select( attList, viewExtent, true, false );
while ( vlayer->nextFeature( f ) )
{
intersectList.clear();
//check, if there is already a point at that position
if ( f.geometry() )
{
intersectList = spatialIndex.intersects( searchRect( f.geometry()->asPoint() ) );
if ( intersectList.empty() )
{
spatialIndex.insertFeature( f );
}
else
{
//go through all the displacement group maps and search an entry where the id equals the result of the spatial search
int existingEntry = intersectList.at( 0 );
bool found = false;
QList<QMap<int, QgsFeature> >::iterator it = mDisplacementGroups.begin();
for ( ; it != mDisplacementGroups.end(); ++it )
{
if ( it->size() > 0 && it->contains( existingEntry ) )
{
found = true;
QgsFeature feature;
it->insert( f.id(), f );
mDisplacementIds.insert( f.id() );
break;
}
}
if ( !found )//insert the already existing feature and the new one into a map
{
QMap<int, QgsFeature> newMap;
QgsFeature existingFeature;
vlayer->featureAtId( existingEntry, existingFeature );
newMap.insert( existingEntry, existingFeature );
mDisplacementIds.insert( existingEntry );
newMap.insert( f.id(), f );
mDisplacementIds.insert( f.id() );
mDisplacementGroups.push_back( newMap );
}
}
}
}
//refresh the selection because the vector layer is going to step through all features now
vlayer->select( attList, viewExtent, true, false );
}
ErrorList topolTest::checkDuplicates( double tolerance, QgsVectorLayer *layer1, QgsVectorLayer *layer2, bool isExtent )
{
Q_UNUSED( tolerance );
Q_UNUSED( layer2 );
//TODO: multilines - check all separate pieces
int i = 0;
ErrorList errorList;
QList<QgsFeatureId> duplicateIds;
QgsSpatialIndex* index = mLayerIndexes[layer1->id()];
QgsGeometry* canvasExtentPoly = QgsGeometry::fromWkt( theQgsInterface->mapCanvas()->extent().asWktPolygon() );
QMap<QgsFeatureId, FeatureLayer>::Iterator it;
QMap<QgsFeatureId, FeatureLayer>::ConstIterator FeatureListEnd = mFeatureMap2.end();
for ( it = mFeatureMap2.begin(); it != FeatureListEnd; ++it )
{
if ( !( ++i % 100 ) )
emit progress( i );
QgsFeatureId currentId = it->feature.id();
if ( duplicateIds.contains( currentId ) )
{
//is already a duplicate geometry..skip..
continue;
}
if ( testCancelled() )
break;
QgsGeometry* g1 = it->feature.geometry();
QgsRectangle bb = g1->boundingBox();
QList<QgsFeatureId> crossingIds;
crossingIds = index->intersects( bb );
QList<QgsFeatureId>::Iterator cit = crossingIds.begin();
QList<QgsFeatureId>::ConstIterator crossingIdsEnd = crossingIds.end();
bool duplicate = false;
for ( ; cit != crossingIdsEnd; ++cit )
{
duplicate = false;
// skip itself
if ( mFeatureMap2[*cit].feature.id() == it->feature.id() )
continue;
const QgsGeometry* g2 = mFeatureMap2[*cit].feature.constGeometry();
if ( !g2 )
{
QgsMessageLog::logMessage( tr( "Invalid second geometry in duplicate geometry test." ), tr( "Topology plugin" ) );
continue;
}
if ( !g2->asGeos() )
{
QgsMessageLog::logMessage( tr( "Failed to import second geometry into GEOS in duplicate geometry test." ), tr( "Topology plugin" ) );
continue;
}
if ( g1->equals( g2 ) )
{
duplicate = true;
duplicateIds.append( mFeatureMap2[*cit].feature.id() );
}
if ( duplicate )
{
QList<FeatureLayer> fls;
fls << *it << *it;
QScopedPointer<QgsGeometry> conflict( new QgsGeometry( *g1 ) );
if ( isExtent )
{
if ( canvasExtentPoly->disjoint( conflict.data() ) )
{
continue;
}
if ( canvasExtentPoly->crosses( conflict.data() ) )
{
conflict.reset( conflict->intersection( canvasExtentPoly ) );
}
}
TopolErrorDuplicates* err = new TopolErrorDuplicates( bb, conflict.take(), fls );
errorList << err;
}
}
}
delete canvasExtentPoly;
return errorList;
}
ErrorList topolTest::checkCloseFeature( double tolerance, QgsVectorLayer* layer1, QgsVectorLayer* layer2, bool isExtent )
{
Q_UNUSED( isExtent );
ErrorList errorList;
QgsSpatialIndex* index = 0;
bool badG1 = false, badG2 = false;
bool skipItself = layer1 == layer2;
int i = 0;
QList<FeatureLayer>::Iterator it;
QList<FeatureLayer>::ConstIterator FeatureListEnd = mFeatureList1.end();
for ( it = mFeatureList1.begin(); it != FeatureListEnd; ++it )
{
if ( !( ++i % 100 ) )
emit progress( i );
if ( testCancelled() )
break;
QgsGeometry* g1 = it->feature.geometry();
if ( !g1 || !g1->asGeos() )
{
badG1 = true;
continue;
}
QgsRectangle bb = g1->boundingBox();
// increase bounding box by tolerance
QgsRectangle frame( bb.xMinimum() - tolerance, bb.yMinimum() - tolerance, bb.xMaximum() + tolerance, bb.yMaximum() + tolerance );
QList<QgsFeatureId> crossingIds;
crossingIds = index->intersects( frame );
QList<QgsFeatureId>::Iterator cit = crossingIds.begin();
QList<QgsFeatureId>::ConstIterator crossingIdsEnd = crossingIds.end();
for ( ; cit != crossingIdsEnd; ++cit )
{
QgsFeature& f = mFeatureMap2[*cit].feature;
QgsGeometry* g2 = f.geometry();
// skip itself, when invoked with the same layer
if ( skipItself && f.id() == it->feature.id() )
continue;
if ( !g2 || !g2->asGeos() )
{
badG2 = true;
continue;
}
if ( g1->distance( *g2 ) < tolerance )
{
QgsRectangle r = g2->boundingBox();
r.combineExtentWith( &bb );
QList<FeatureLayer> fls;
FeatureLayer fl;
fl.feature = f;
fl.layer = layer2;
fls << *it << fl;
QgsGeometry* conflict = new QgsGeometry( *g2 );
TopolErrorClose* err = new TopolErrorClose( r, conflict, fls );
//TopolErrorClose* err = new TopolErrorClose(r, g2, fls);
errorList << err;
}
}
}
if ( badG2 )
QgsMessageLog::logMessage( tr( "Invalid second geometry." ), tr( "Topology plugin" ) );
if ( badG1 )
QgsMessageLog::logMessage( tr( "Invalid first geometry." ), tr( "Topology plugin" ) );
return errorList;
}
ErrorList topolTest::checkPointInPolygon( double tolerance, QgsVectorLayer *layer1, QgsVectorLayer *layer2, bool isExtent )
{
Q_UNUSED( tolerance );
int i = 0;
ErrorList errorList;
if ( layer1->geometryType() != QGis::Point )
{
return errorList;
}
if ( layer2->geometryType() != QGis::Polygon )
{
return errorList;
}
QgsSpatialIndex* index = mLayerIndexes[layer2->id()];
QgsGeometry* canvasExtentPoly = QgsGeometry::fromWkt( theQgsInterface->mapCanvas()->extent().asWktPolygon() );
QList<FeatureLayer>::Iterator it;
for ( it = mFeatureList1.begin(); it != mFeatureList1.end(); ++it )
{
if ( !( ++i % 100 ) )
emit progress( i );
if ( testCancelled() )
break;
QgsGeometry* g1 = it->feature.geometry();
QgsRectangle bb = g1->boundingBox();
QList<QgsFeatureId> crossingIds;
crossingIds = index->intersects( bb );
QList<QgsFeatureId>::Iterator cit = crossingIds.begin();
QList<QgsFeatureId>::ConstIterator crossingIdsEnd = crossingIds.end();
bool touched = false;
for ( ; cit != crossingIdsEnd; ++cit )
{
QgsFeature& f = mFeatureMap2[*cit].feature;
const QgsGeometry* g2 = f.constGeometry();
if ( !g2 || !g2->asGeos() )
{
QgsMessageLog::logMessage( tr( "Second geometry missing or GEOS import failed." ), tr( "Topology plugin" ) );
continue;
}
if ( g2->contains( g1 ) )
{
touched = true;
break;
}
}
if ( !touched )
{
QgsGeometry* conflictGeom = new QgsGeometry( *g1 );
if ( isExtent )
{
if ( canvasExtentPoly->disjoint( conflictGeom ) )
{
delete conflictGeom;
continue;
}
}
QList<FeatureLayer> fls;
fls << *it << *it;
//bb.scale(10);
TopolErrorPointNotInPolygon* err = new TopolErrorPointNotInPolygon( bb, conflictGeom, fls );
errorList << err;
}
}
delete canvasExtentPoly;
return errorList;
}
void QgsPointDisplacementRenderer::createDisplacementGroups( QgsVectorLayer* vlayer, const QgsRectangle& viewExtent )
{
if ( !vlayer || ( vlayer->wkbType() != QGis::WKBPoint && vlayer->wkbType() != QGis::WKBPoint25D ) )
{
return;
}
mDisplacementGroups.clear();
mDisplacementIds.clear();
//use a spatial index to check if there is already a point at a position
QgsSpatialIndex spatialIndex;
//attributes
QgsAttributeList attList;
QList<QString> attributeStrings = usedAttributes();
QList<QString>::const_iterator attStringIt = attributeStrings.constBegin();
for ( ; attStringIt != attributeStrings.constEnd(); ++attStringIt )
{
attList.push_back( vlayer->fieldNameIndex( *attStringIt ) );
}
QgsFeature f;
QList<QgsFeatureId> intersectList;
//Because the new vector api does not allow querying features by id within a nextFeature loop, default constructed QgsFeature() is
//inserted first and the real features are created in a second loop
QgsFeatureIterator fit = vlayer->getFeatures( QgsFeatureRequest().setFilterRect( viewExtent ).setSubsetOfAttributes( attList ) );
while ( fit.nextFeature( f ) )
{
intersectList.clear();
//check, if there is already a point at that position
if ( f.geometry() )
{
intersectList = spatialIndex.intersects( searchRect( f.geometry()->asPoint() ) );
if ( intersectList.empty() )
{
spatialIndex.insertFeature( f );
}
else
{
//go through all the displacement group maps and search an entry where the id equals the result of the spatial search
QgsFeatureId existingEntry = intersectList.at( 0 );
bool found = false;
QList< QMap<QgsFeatureId, QgsFeature> >::iterator it = mDisplacementGroups.begin();
for ( ; it != mDisplacementGroups.end(); ++it )
{
if ( it->size() > 0 && it->contains( existingEntry ) )
{
found = true;
QgsFeature feature;
it->insert( f.id(), QgsFeature() );
mDisplacementIds.insert( f.id() );
break;
}
}
if ( !found )//insert the already existing feature and the new one into a map
{
QMap<QgsFeatureId, QgsFeature> newMap;
newMap.insert( existingEntry, QgsFeature() );
mDisplacementIds.insert( existingEntry );
newMap.insert( f.id(), QgsFeature() );
mDisplacementIds.insert( f.id() );
mDisplacementGroups.push_back( newMap );
}
}
}
}
//insert the real features into mDisplacementGroups
QList< QMap<QgsFeatureId, QgsFeature> >::iterator it = mDisplacementGroups.begin();
for ( ; it != mDisplacementGroups.end(); ++it )
{
QMap<QgsFeatureId, QgsFeature>::iterator mapIt = it->begin();
for ( ; mapIt != it->end(); ++mapIt )
{
QgsFeature fet;
vlayer->getFeatures( QgsFeatureRequest().setFilterFid( mapIt.key() ) ).nextFeature( fet );
mapIt.value() = fet;
}
}
}
ErrorList topolTest::checkDuplicates( QgsVectorLayer *layer1, QgsVectorLayer *layer2, bool isExtent )
{
Q_UNUSED( layer2 );
//TODO: multilines - check all separate pieces
int i = 0;
ErrorList errorList;
QList<QgsFeatureId> duplicateIds;
QgsSpatialIndex *index = mLayerIndexes[layer1->id()];
QgsGeometry canvasExtentPoly = QgsGeometry::fromWkt( qgsInterface->mapCanvas()->extent().asWktPolygon() );
QMap<QgsFeatureId, FeatureLayer>::const_iterator it;
for ( it = mFeatureMap2.constBegin(); it != mFeatureMap2.constEnd(); ++it )
{
if ( !( ++i % 100 ) )
emit progress( i );
QgsFeatureId currentId = it->feature.id();
if ( duplicateIds.contains( currentId ) )
{
//is already a duplicate geometry..skip..
continue;
}
if ( testCanceled() )
break;
QgsGeometry g1 = it->feature.geometry();
QgsRectangle bb = g1.boundingBox();
QList<QgsFeatureId> crossingIds;
crossingIds = index->intersects( bb );
QList<QgsFeatureId>::ConstIterator cit = crossingIds.constBegin();
QList<QgsFeatureId>::ConstIterator crossingIdsEnd = crossingIds.constEnd();
bool duplicate = false;
for ( ; cit != crossingIdsEnd; ++cit )
{
duplicate = false;
// skip itself
if ( mFeatureMap2[*cit].feature.id() == it->feature.id() )
continue;
QgsGeometry g2 = mFeatureMap2[*cit].feature.geometry();
if ( g2.isNull() )
{
QgsMessageLog::logMessage( tr( "Invalid second geometry in duplicate geometry test." ), tr( "Topology plugin" ) );
continue;
}
if ( !_canExportToGeos( g2 ) )
{
QgsMessageLog::logMessage( tr( "Failed to import second geometry into GEOS in duplicate geometry test." ), tr( "Topology plugin" ) );
continue;
}
if ( g1.isGeosEqual( g2 ) )
{
duplicate = true;
duplicateIds.append( mFeatureMap2[*cit].feature.id() );
}
if ( duplicate )
{
QList<FeatureLayer> fls;
fls << *it << *it;
QgsGeometry conflict( g1 );
if ( isExtent )
{
if ( canvasExtentPoly.disjoint( conflict ) )
{
continue;
}
if ( canvasExtentPoly.crosses( conflict ) )
{
conflict = conflict.intersection( canvasExtentPoly );
}
}
TopolErrorDuplicates *err = new TopolErrorDuplicates( bb, conflict, fls );
errorList << err;
}
}
}
return errorList;
}
