C++ (Cpp) QVector::takeAt Examples

Example #1

File: qgsinternalgeometryengine.cpp Project: dbaston/QGIS

QgsGeometry QgsInternalGeometryEngine::densifyByDistance( double distance ) const
{
  if ( !mGeometry )
  {
    return QgsGeometry();
  }

  if ( QgsWkbTypes::geometryType( mGeometry->wkbType() ) == QgsWkbTypes::PointGeometry )
  {
    return QgsGeometry( mGeometry->clone() ); // point geometry, nothing to do
  }

  if ( const QgsGeometryCollection *gc = qgsgeometry_cast< const QgsGeometryCollection *>( mGeometry ) )
  {
    int numGeom = gc->numGeometries();
    QVector< QgsAbstractGeometry * > geometryList;
    geometryList.reserve( numGeom );
    for ( int i = 0; i < numGeom; ++i )
    {
      geometryList << densifyGeometry( gc->geometryN( i ), -1, distance );
    }

    QgsGeometry first = QgsGeometry( geometryList.takeAt( 0 ) );
    for ( QgsAbstractGeometry *g : qgis::as_const( geometryList ) )
    {
      first.addPart( g );
    }
    return first;
  }
  else
  {
    return QgsGeometry( densifyGeometry( mGeometry, -1, distance ) );
  }
}

Example #2

File: qgsinternalgeometryengine.cpp Project: dbaston/QGIS

QgsGeometry QgsInternalGeometryEngine::orthogonalize( double tolerance, int maxIterations, double angleThreshold ) const
{
  if ( !mGeometry || ( QgsWkbTypes::geometryType( mGeometry->wkbType() ) != QgsWkbTypes::LineGeometry
                       && QgsWkbTypes::geometryType( mGeometry->wkbType() ) != QgsWkbTypes::PolygonGeometry ) )
  {
    return QgsGeometry();
  }

  double lowerThreshold = std::cos( ( 90 - angleThreshold ) * M_PI / 180.00 );
  double upperThreshold = std::cos( angleThreshold * M_PI / 180.0 );

  if ( const QgsGeometryCollection *gc = qgsgeometry_cast< const QgsGeometryCollection *>( mGeometry ) )
  {
    int numGeom = gc->numGeometries();
    QVector< QgsAbstractGeometry * > geometryList;
    geometryList.reserve( numGeom );
    for ( int i = 0; i < numGeom; ++i )
    {
      geometryList << orthogonalizeGeom( gc->geometryN( i ), maxIterations, tolerance, lowerThreshold, upperThreshold );
    }

    QgsGeometry first = QgsGeometry( geometryList.takeAt( 0 ) );
    for ( QgsAbstractGeometry *g : qgis::as_const( geometryList ) )
    {
      first.addPart( g );
    }
    return first;
  }
  else
  {
    return QgsGeometry( orthogonalizeGeom( mGeometry, maxIterations, tolerance, lowerThreshold, upperThreshold ) );
  }
}