VisTags.cpp File Reference

#include <iostream>
#include <vector>
#include <sstream>
#include <string>
#include "moab/Core.hpp"
#include "MBTagConventions.hpp"
#include "moab/FileOptions.hpp"

Include dependency graph for VisTags.cpp:

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Functions
int	main (int argc, char **argv)

Function Documentation

main()

int main	(	int	argc,
		char **	argv
	)

Examples

VisTags.cpp.

Definition at line 42 of file VisTags.cpp.

{
#ifdef MOAB_HAVE_NETCDF
 
#ifdef MOAB_HAVE_MPI
 MPI_Init( &argc, &argv );
#endif
 
 ErrorCode rval;
 string file_input, file_output;
 string read_opts, tags; // Tags to write, separated by commas; it is the name of the tag
 if( argc < 2 )
 {
 file_input = string( MESH_DIR ) + string( "/io/gcrm_r3.nc" );
 file_output = "VisTagsOut.vtk";
 }
 else
 {
 file_input = argv[1];
 file_output = argv[2];
 }
 read_opts = "";
 tags = "";
 
 // Instantiate
 Interface* mb = new( std::nothrow ) Core;
 if( NULL == mb ) return 1;
 
 int dimension = 2;
 // In MOAB, it may have index after reading (T0, T1, etc)
 char* levels = NULL; // Levels, separated by commas, no spaces (like 0, 1, 19)
 if( argc > 3 )
 {
 int index = 3;
 while( index < argc )
 {
 if( !strcmp( argv[index], "-O" ) ) // This is for reading options, optional
 read_opts = argv[++index];
 if( !strcmp( argv[index], "-t" ) ) tags = argv[++index];
 if( !strcmp( argv[index], "-l" ) ) levels = argv[++index];
 if( !strcmp( argv[index], "-d" ) ) dimension = atoi( argv[++index] );
 index++;
 }
 }
 
 ostringstream opts;
 opts << ";;TAGS=" << tags << ";LEVELS=" << levels << "\0";
 FileOptions fo( opts.str().c_str() );
 
 vector< string > tagsNames;
 vector< int > levelsArray;
 fo.get_strs_option( "TAGS", tagsNames );
 fo.get_ints_option( "LEVELS", levelsArray );
 
 // Load the input file with the specified options
 rval = mb->load_file( file_input.c_str(), 0, read_opts.c_str() );MB_CHK_SET_ERR( rval, "not loading file" );
 
 Range ents;
 rval = mb->get_entities_by_dimension( 0, dimension, ents );MB_CHK_SET_ERR( rval, "not getting ents" );
 
 // Now create double tags for entities of dimension
 for( size_t i = 0; i < tagsNames.size(); i++ )
 {
 string tagName = tagsNames[i];
 Tag tagh;
 rval = mb->tag_get_handle( tagName.c_str(), tagh );
 if( MB_SUCCESS != rval )
 {
 cout << "not getting tag " << tagName.c_str() << "\n";
 continue;
 }
 
 int len = 0;
 rval = mb->tag_get_length( tagh, len );
 if( MB_SUCCESS != rval )
 {
 cout << "not getting tag len " << tagName.c_str() << "\n";
 continue;
 }
 
 DataType type;
 rval = mb->tag_get_data_type( tagh, type );
 if( MB_SUCCESS != rval )
 {
 cout << "not getting tag type " << tagName.c_str() << "\n";
 continue;
 }
 
 int count;
 void* dataptr; // Assume double tags, for simplicity
 rval = mb->tag_iterate( tagh, ents.begin(), ents.end(), count, dataptr );
 if( MB_SUCCESS != rval || count != (int)ents.size() )
 {
 cout << "not getting tag iterate right " << tagName.c_str() << "\n";
 continue;
 }
 
 // Now create a new tag, with a new name, concatenated, and copy data there , for each level
 for( size_t j = 0; j < levelsArray.size(); j++ )
 {
 int level = levelsArray[j];
 if( level >= len )
 {
 cout << "level too big at " << level << "\n";
 continue;
 }
 
 ostringstream newTagName;
 newTagName << tagName << "_" << level;
 Tag newTagh;
 rval = mb->tag_get_handle( newTagName.str().c_str(), 1, type, newTagh, MB_TAG_DENSE | MB_TAG_CREAT );
 if( MB_SUCCESS != rval )
 {
 cout << "not getting new tag " << newTagName.str() << "\n";
 continue;
 }
 
 void* newDataPtr;
 rval = mb->tag_iterate( newTagh, ents.begin(), ents.end(), count, newDataPtr );
 if( MB_SUCCESS != rval || count != (int)ents.size() )
 {
 cout << "not getting new tag iterate " << newTagName.str() << "\n";
 continue;
 }
 
 if( MB_TYPE_DOUBLE == type )
 {
 double* ptrD = (double*)newDataPtr;
 double* oldData = (double*)dataptr;
 for( int k = 0; k < count; k++, ptrD++ )
 *ptrD = oldData[level + count * k];
 }
 } // for (size_t j = 0; j < levelsArray.size(); j++)
 
 mb->tag_delete( tagh ); // No need for the tag anymore, write it to the new file
 } // for (size_t i = 0; i < tagsNames.size(); i++)
 
 rval = mb->write_file( file_output.c_str() );MB_CHK_SET_ERR( rval, "Can't write file " << file_output );
 cout << "Successfully wrote file " << file_output << "\n";
 
 delete mb;
 
#ifdef MOAB_HAVE_MPI
 MPI_Finalize();
#endif
#else
 std::cout << " configure with netcdf for this example to work\n";
#endif
 return 0;
}

References moab::Range::begin(), moab::Range::end(), ErrorCode, moab::Core::get_entities_by_dimension(), moab::FileOptions::get_ints_option(), moab::FileOptions::get_strs_option(), moab::Core::load_file(), mb, MB_CHK_SET_ERR, MB_SUCCESS, MB_TAG_CREAT, MB_TAG_DENSE, MB_TYPE_DOUBLE, MESH_DIR, moab::Range::size(), moab::Core::tag_delete(), moab::Core::tag_get_data_type(), moab::Core::tag_get_handle(), moab::Core::tag_get_length(), moab::Core::tag_iterate(), and moab::Core::write_file().