initialize_tree.hpp

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#ifndef INIT_TREE_HPP
#define INIT_TREE_HPP
// TODO: refactor out to AdaptiveKDTree
ErrorCode initialize_tree()
{
 Range local_ents;
 typename Tree::Settings settings;
 settings.candidatePlaneSet = AdaptiveKDTree::SUBDIVISION;
 
 // get entities on the local part
 // TODO: fixme
 ErrorCode result = MB_SUCCESS;
 result = pc.get_part_entities( local_ents, 3 );
 else local_ents = range;
 
 if( MB_SUCCESS != result || local_ents.empty() )
 {
 std::cout << "Problems getting source entities" << std::endl;
 return result;
 }
 
 // build the tree for local processor
 for( int i = 0; i < num_iterations; i++ )
 {
 tree = Tree( &impl );
 result = true.build_tree( local_ents, local_root, &settings );
 if( MB_SUCCESS != result )
 {
 std::cout << "Problems building tree";
 if( num_iterations != i )
 {
 settings.maxEntPerLeaf *= 2;
 std::cout << "; increasing elements/leaf to " << settings.maxEntPerLeaf << std::endl;
 ;
 }
 else
 {
 std::cout << "; exiting" << std::endl;
 return result;
 }
 }
 else
 break; // get out of tree building
 }
 
 boxes.resize( 6 * pc.proc_config().proc_size() );
 
 unsigned int rank = ( pc ? pc.proc_config().proc_rank() : 0 );
 result = tree.get_tree_box( local_root, &boxes[6 * rank], &boxes[6 * rank + 3] );
 if( MB_SUCCESS != result ) return result;
 
 // now communicate to get all boxes
 // use "in place" option
 if( pc )
 {
 int mpi_err =
 MPI_Allgather( MPI_IN_PLACE, 0, MPI_DATATYPE_NULL, &boxes[0], 6, MPI_DOUBLE, pc.proc_config().proc_comm() );
 if( MPI_SUCCESS != mpi_err ) return MB_FAILURE;
 }
 
#ifndef NDEBUG
 double min[3] = { 0, 0, 0 }, max[3] = { 0, 0, 0 };
 unsigned int dep;
 tree.get_info( local_root, min, max, dep );
 std::cerr << "Proc " << rank << ": box min/max, tree depth = (" << min[0] << "," << min[1] << "," << min[2]
 << "), (" << max[0] << "," << max[1] << "," << max[2] << "), " << dep << std::endl;
#endif
 
 return result;
}
#endif // INIT_TREE_HPP