HelloMOAB.cpp File Reference

#include "moab/Core.hpp"
#include <iostream>
#include <memory>
#include <string>

Include dependency graph for HelloMOAB.cpp:

Go to the source code of this file.

Namespaces
	anonymous_namespace{HelloMOAB.cpp}

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

Variables
const char *const	anonymous_namespace{HelloMOAB.cpp}::DEFAULT_MESH_FILE = "3k-tri-sphere.vtk"

Function Documentation

main()

int main	(	int	argc,
		char **	argv
	)

Examples

HelloMOAB.cpp.

Definition at line 35 of file HelloMOAB.cpp.

{
    try
    {
        // Create MOAB instance with smart pointer for automatic cleanup
        auto moab = std::make_unique< Core >();
        if( !moab )
        {
            std::cerr << "Error: Failed to create MOAB instance\n";
            return 1;
        }
 
        // Parse input filename
        const std::string mesh_file =
            ( argc > 1 ) ? argv[1] : std::string( MESH_DIR ) + "/" + std::string( DEFAULT_MESH_FILE );
 
        // Load the mesh from file with error checking
        MB_CHK_SET_ERR( moab->load_mesh( mesh_file.c_str() ), "Error: Could not load mesh file: " << mesh_file );
 
        // Get entities by type/dimension
        Range vertices, edges, faces, elements;
        MB_CHK_ERR( moab->get_entities_by_type( 0, MBVERTEX, vertices ) );
        MB_CHK_ERR( moab->get_entities_by_type( 0, MBEDGE, edges ) );
        MB_CHK_ERR( moab->get_entities_by_dimension( 0, 2, faces ) );
        MB_CHK_ERR( moab->get_entities_by_dimension( 0, 3, elements ) );
 
        // Output the number of entities with formatted output
        const auto print_entity_count = []( const std::string& name, const auto& range ) {
            std::cout << "Number of " << name << ": " << range.size() << "\n";
        };
 
        print_entity_count( "vertices", vertices );
        print_entity_count( "edges   ", edges );
        print_entity_count( "faces   ", faces );
        print_entity_count( "elements", elements );
 
        return 0;
    }
    catch( const std::exception& e )
    {
        std::cerr << "Error: " << e.what() << "\n";
        return 1;
    }
    catch( ... )
    {
        std::cerr << "Error: Unknown exception occurred\n";
        return 1;
    }
}

References anonymous_namespace{HelloMOAB.cpp}::DEFAULT_MESH_FILE, MB_CHK_ERR, MB_CHK_SET_ERR, MBEDGE, MBVERTEX, and MESH_DIR.