void QgsGeometryDuplicateNodesCheck::collectErrors( QList<QgsGeometryCheckError*>& errors, QStringList &/*messages*/, QAtomicInt* progressCounter , const QgsFeatureIds &ids ) const
{
  const QgsFeatureIds& featureIds = ids.isEmpty() ? mFeaturePool->getFeatureIds() : ids;
  Q_FOREACH ( QgsFeatureId featureid, featureIds )
  {
    if ( progressCounter ) progressCounter->fetchAndAddRelaxed( 1 );
    QgsFeature feature;
    if ( !mFeaturePool->get( featureid, feature ) )
    {
      continue;
    }

    QgsAbstractGeometryV2* geom = feature.geometry()->geometry();
    for ( int iPart = 0, nParts = geom->partCount(); iPart < nParts; ++iPart )
    {
      for ( int iRing = 0, nRings = geom->ringCount( iPart ); iRing < nRings; ++iRing )
      {
        int nVerts = QgsGeomUtils::polyLineSize( geom, iPart, iRing );
        if ( nVerts < 2 )
          continue;
        for ( int iVert = nVerts - 1, jVert = 0; jVert < nVerts; iVert = jVert++ )
        {
          QgsPointV2 pi = geom->vertexAt( QgsVertexId( iPart, iRing, iVert ) );
          QgsPointV2 pj = geom->vertexAt( QgsVertexId( iPart, iRing, jVert ) );
          if ( QgsGeometryUtils::sqrDistance2D( pi, pj ) < QgsGeometryCheckPrecision::tolerance() * QgsGeometryCheckPrecision::tolerance() )
          {
            errors.append( new QgsGeometryCheckError( this, featureid, pj, QgsVertexId( iPart, iRing, jVert ) ) );
          }
        }
      }
    }
  }
}
void QgsGeometrySelfIntersectionCheck::collectErrors( QList<QgsGeometryCheckError*>& errors, QStringList &/*messages*/, QAtomicInt* progressCounter , const QgsFeatureIds &ids ) const
{
  const QgsFeatureIds& featureIds = ids.isEmpty() ? mFeaturePool->getFeatureIds() : ids;
  Q_FOREACH ( QgsFeatureId featureid, featureIds )
  {
    if ( progressCounter ) progressCounter->fetchAndAddRelaxed( 1 );
    QgsFeature feature;
    if ( !mFeaturePool->get( featureid, feature ) )
    {
      continue;
    }
    QgsAbstractGeometryV2* geom = feature.geometry()->geometry();

    for ( int iPart = 0, nParts = geom->partCount(); iPart < nParts; ++iPart )
    {
      for ( int iRing = 0, nRings = geom->ringCount( iPart ); iRing < nRings; ++iRing )
      {
        Q_FOREACH ( const QgsGeometryUtils::SelfIntersection& inter, QgsGeometryUtils::getSelfIntersections( geom, iPart, iRing, QgsGeometryCheckPrecision::tolerance() ) )
        {
          errors.append( new QgsGeometrySelfIntersectionCheckError( this, featureid, inter.point, QgsVertexId( iPart, iRing ), inter ) );
        }
      }
    }
  }
void QgsGeometrySegmentLengthCheck::collectErrors( QList<QgsGeometryCheckError*>& errors, QStringList &/*messages*/, QAtomicInt* progressCounter , const QgsFeatureIds &ids ) const
{
  const QgsFeatureIds& featureIds = ids.isEmpty() ? mFeaturePool->getFeatureIds() : ids;
  Q_FOREACH ( QgsFeatureId featureid, featureIds )
  {
    if ( progressCounter ) progressCounter->fetchAndAddRelaxed( 1 );
    QgsFeature feature;
    if ( !mFeaturePool->get( featureid, feature ) )
    {
      continue;
    }
    QgsAbstractGeometryV2* geom = feature.geometry()->geometry();

    for ( int iPart = 0, nParts = geom->partCount(); iPart < nParts; ++iPart )
    {
      for ( int iRing = 0, nRings = geom->ringCount( iPart ); iRing < nRings; ++iRing )
      {
        int nVerts = QgsGeomUtils::polyLineSize( geom, iPart, iRing );
        if ( nVerts < 2 )
        {
          continue;
        }
        for ( int iVert = 0, jVert = nVerts - 1; iVert < nVerts; jVert = iVert++ )
        {
          QgsPointV2 pi = geom->vertexAt( QgsVertexId( iPart, iRing, iVert ) );
          QgsPointV2 pj = geom->vertexAt( QgsVertexId( iPart, iRing, jVert ) );
          double dist = qSqrt( QgsGeometryUtils::sqrDistance2D( pi, pj ) );
          if ( dist < mMinLength )
          {
            errors.append( new QgsGeometryCheckError( this, featureid, QgsPointV2( 0.5 * ( pi.x() + pj.x() ), 0.5 * ( pi.y() + pj.y() ) ), QgsVertexId( iPart, iRing, iVert ), dist, QgsGeometryCheckError::ValueLength ) );
          }
        }
      }
    }
  }
}