Method GetData3DSizes

plugins/e57/libE57Format/src/ReaderImpl.cpp:1383–1497

This function returns the size of the point data

   // This function returns the size of the point data
   bool ReaderImpl::GetData3DSizes( int64_t dataIndex, int64_t &row, int64_t &column,
                                    int64_t &pointsSize, int64_t &groupsSize, int64_t &countSize,
                                    bool &bColumnIndex ) const
   {
      int64_t elementSize = 0;

      row = 0;
      column = 0;
      pointsSize = 0;
      groupsSize = 0;
      countSize = 0;
      bColumnIndex = false;

      if ( !IsOpen() || ( dataIndex < 0 ) || ( dataIndex >= data3D_.childCount() ) )
      {
         return false;
      }

      const StructureNode scan( data3D_.get( dataIndex ) );
      const CompressedVectorNode points( scan.get( "points" ) );

      pointsSize = points.childCount();

      if ( scan.isDefined( "indexBounds" ) )
      {
         const StructureNode indexBounds( scan.get( "indexBounds" ) );

         if ( indexBounds.isDefined( "columnMaximum" ) )
         {
            column = IntegerNode( indexBounds.get( "columnMaximum" ) ).value() -
                     IntegerNode( indexBounds.get( "columnMinimum" ) ).value() + 1;
         }

         if ( indexBounds.isDefined( "rowMaximum" ) )
         {
            row = IntegerNode( indexBounds.get( "rowMaximum" ) ).value() -
                  IntegerNode( indexBounds.get( "rowMinimum" ) ).value() + 1;
         }
      }

      if ( scan.isDefined( "pointGroupingSchemes" ) )
      {
         const StructureNode pointGroupingSchemes( scan.get( "pointGroupingSchemes" ) );

         if ( pointGroupingSchemes.isDefined( "groupingByLine" ) )
         {
            const StructureNode groupingByLine( pointGroupingSchemes.get( "groupingByLine" ) );
            const StringNode idElementName( groupingByLine.get( "idElementName" ) );

            if ( idElementName.value() == "columnIndex" )
            {
               bColumnIndex = true;
            }

            const CompressedVectorNode groups( groupingByLine.get( "groups" ) );
            const StructureNode lineGroupRecord( groups.prototype() );

            groupsSize = groups.childCount();