Method WriteData3DGroupsData

plugins/e57/libE57Format/src/WriterImpl.cpp:1311–1353

This function writes out the group data

   // This function writes out the group data
   bool WriterImpl::WriteData3DGroupsData( int64_t dataIndex, size_t groupCount,
                                           int64_t *idElementValue, int64_t *startPointIndex,
                                           int64_t *pointCount )
   {
      if ( ( dataIndex < 0 ) || ( dataIndex >= data3D_.childCount() ) )
      {
         return false;
      }

      const StructureNode scan( data3D_.get( dataIndex ) );

      if ( !scan.isDefined( "pointGroupingSchemes" ) )
      {
         return false;
      }

      const StructureNode pointGroupingSchemes( scan.get( "pointGroupingSchemes" ) );

      if ( !pointGroupingSchemes.isDefined( "groupingByLine" ) )
      {
         return false;
      }

      const StructureNode groupingByLine( pointGroupingSchemes.get( "groupingByLine" ) );

      if ( !groupingByLine.isDefined( "groups" ) )
      {
         return false;
      }

      CompressedVectorNode groups( groupingByLine.get( "groups" ) );

      std::vector<SourceDestBuffer> groupSDBuffers;
      groupSDBuffers.emplace_back( imf_, "idElementValue", idElementValue, groupCount, true );
      groupSDBuffers.emplace_back( imf_, "startPointIndex", startPointIndex, groupCount, true );
      groupSDBuffers.emplace_back( imf_, "pointCount", pointCount, groupCount, true );

      CompressedVectorWriter writer = groups.writer( groupSDBuffers );
      writer.write( groupCount );
      writer.close();

      return true;
   }

   StructureNode WriterImpl::GetRawE57Root()
   {