sphere_decomp.cpp

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/*
 * Sphere decomp tool.  Meshes a group of spheres and the interstices between with
 * hex elements, by triangulating the vertices corresponding to sphere centers
 * and subdividing those tets.  For a description of the subdivision template used,
 * see comments in the subdivide_tet function below.
 */

#include "moab/Core.hpp"
#include "SphereDecomp.hpp"
#include <iostream>

const char* SPHERE_RADII_TAG_NAME = "SPHERE_RADII";

#define RR \
    if( moab::MB_SUCCESS != result ) return result

int main( int argc, char* argv[] )
{
    if( argc < 3 )
    {
        std::cout << "Usage: " << argv[0] << " <input_mesh> <output_mesh>" << std::endl;
        return 0;
    }

    // create MOAB
    moab::Interface* mbImpl = new moab::Core();

    // read in mesh
    moab::ErrorCode result = mbImpl->load_mesh( argv[1] );
    if( moab::MB_SUCCESS != result )
    {
        std::cout << "Problems loading mesh." << std::endl;
        return 1;
    }

    moab::Tag sphere_radii_tag = 0;
    double dum_val             = 0.1;
    result = mbImpl->tag_get_handle( SPHERE_RADII_TAG_NAME, 1, moab::MB_TYPE_DOUBLE, sphere_radii_tag,
                                     moab::MB_TAG_DENSE | moab::MB_TAG_CREAT, &dum_val );
    if( moab::MB_SUCCESS != result )
    {
        std::cout << "Problem allocating SPHERE_RADII tag." << std::endl;
        return 1;
    }

    SphereDecomp sd( mbImpl );

    moab::EntityHandle this_set = 0;
    result                      = sd.build_sphere_mesh( SPHERE_RADII_TAG_NAME, &this_set );RR;

    // write mesh
    result = mbImpl->write_mesh( argv[2], &this_set, 1 );RR;

    return 0;
}