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/*
This file is part of p4est.
p4est is a C library to manage a collection (a forest) of multiple
connected adaptive quadtrees or octrees in parallel.
Copyright (C) 2010 The University of Texas System
Additional copyright (C) 2011 individual authors
Written by Carsten Burstedde, Lucas C. Wilcox, and Tobin Isaac
p4est is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
p4est is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with p4est; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef P4_TO_P8
#include <p4est_algorithms.h>
#include <p4est_bits.h>
#include <p4est_extended.h>
#include <p4est_ghost.h>
#include <p4est_nodes.h>
#else
#include <p8est_algorithms.h>
#include <p8est_bits.h>
#include <p8est_extended.h>
#include <p8est_ghost.h>
#include <p8est_nodes.h>
#endif
#ifndef P4_TO_P8
static const int refine_level = 5;
#else
static const int refine_level = 3;
#endif
static void
init_fn (p4est_t * p4est, p4est_topidx_t which_tree,
p4est_quadrant_t * quadrant)
{
}
static int
refine_fn (p4est_t * p4est, p4est_topidx_t which_tree,
p4est_quadrant_t * quadrant)
{
int cid;
if (which_tree == 2 || which_tree == 3) {
return 0;
}
cid = p4est_quadrant_child_id (quadrant);
if (cid == P4EST_CHILDREN - 1 ||
(quadrant->x >= P4EST_LAST_OFFSET (P4EST_MAXLEVEL - 2) &&
quadrant->y >= P4EST_LAST_OFFSET (P4EST_MAXLEVEL - 2)
#ifdef P4_TO_P8
&& quadrant->z >= P4EST_LAST_OFFSET (P4EST_MAXLEVEL - 2)
#endif
)) {
return 1;
}
if ((int) quadrant->level >= (refine_level - (int) (which_tree % 3))) {
return 0;
}
if (quadrant->level == 1 && cid == 2) {
return 1;
}
if (quadrant->x == P4EST_QUADRANT_LEN (2) &&
quadrant->y == P4EST_LAST_OFFSET (2)) {
return 1;
}
if (quadrant->y >= P4EST_QUADRANT_LEN (2)) {
return 0;
}
return 1;
}
int
main (int argc, char **argv)
{
sc_MPI_Comm mpicomm;
int mpiret;
int mpisize, mpirank;
unsigned crc;
#ifndef P4_TO_P8
size_t kz;
int8_t l;
p4est_quadrant_t *q;
p4est_tree_t stree, *tree = &stree;
#endif
p4est_t *p4est;
p4est_connectivity_t *connectivity;
/* initialize MPI */
mpiret = sc_MPI_Init (&argc, &argv);
SC_CHECK_MPI (mpiret);
mpicomm = sc_MPI_COMM_WORLD;
mpiret = sc_MPI_Comm_size (mpicomm, &mpisize);
SC_CHECK_MPI (mpiret);
mpiret = sc_MPI_Comm_rank (mpicomm, &mpirank);
SC_CHECK_MPI (mpiret);
sc_init (mpicomm, 1, 1, NULL, SC_LP_DEFAULT);
p4est_init (NULL, SC_LP_DEFAULT);
#ifndef P4_TO_P8
connectivity = p4est_connectivity_new_star ();
#else
connectivity = p8est_connectivity_new_rotcubes ();
#endif
p4est = p4est_new_ext (mpicomm, connectivity, 0, 0, 0, 4, NULL, NULL);
#ifndef P4_TO_P8
/* build empty tree */
sc_array_init (&tree->quadrants, sizeof (p4est_quadrant_t));
for (l = 0; l <= P4EST_MAXLEVEL; ++l) {
tree->quadrants_per_level[l] = 0;
}
tree->maxlevel = 0;
/* insert two quadrants */
sc_array_resize (&tree->quadrants, 4);
q = p4est_quadrant_array_index (&tree->quadrants, 0);
p4est_quadrant_set_morton (q, 3, 13);
q = p4est_quadrant_array_index (&tree->quadrants, 1);
p4est_quadrant_set_morton (q, 1, 1);
q = p4est_quadrant_array_index (&tree->quadrants, 2);
p4est_quadrant_set_morton (q, 1, 2);
q = p4est_quadrant_array_index (&tree->quadrants, 3);
p4est_quadrant_set_morton (q, 1, 3);
for (kz = 0; kz < tree->quadrants.elem_count; ++kz) {
q = p4est_quadrant_array_index (&tree->quadrants, kz);
q->p.user_data = sc_mempool_alloc (p4est->user_data_pool);
++tree->quadrants_per_level[q->level];
tree->maxlevel = (int8_t) SC_MAX (tree->maxlevel, q->level);
}
/* balance the tree, print and destroy */
#if 0
p4est_balance_subtree (p4est, P4EST_CONNECT_FULL, 0, NULL);
p4est_tree_print (SC_LP_INFO, tree);
#endif
for (kz = 0; kz < tree->quadrants.elem_count; ++kz) {
q = p4est_quadrant_array_index (&tree->quadrants, kz);
sc_mempool_free (p4est->user_data_pool, q->p.user_data);
}
sc_array_reset (&tree->quadrants);
#endif /* !P4_TO_P8 */
/* check reset data function */
p4est_reset_data (p4est, 0, init_fn, NULL);
p4est_reset_data (p4est, 0, NULL, NULL);
/* refine and balance the forest */
SC_CHECK_ABORT (p4est_is_balanced (p4est, P4EST_CONNECT_FULL), "Balance 1");
p4est_refine (p4est, 1, refine_fn, NULL);
SC_CHECK_ABORT (!p4est_is_balanced (p4est, P4EST_CONNECT_FULL),
"Balance 2");
p4est_balance (p4est, P4EST_CONNECT_FULL, NULL);
SC_CHECK_ABORT (p4est_is_balanced (p4est, P4EST_CONNECT_FULL), "Balance 3");
/* check reset data function */
p4est_reset_data (p4est, 17, NULL, NULL);
p4est_reset_data (p4est, 8, init_fn, NULL);
/* checksum and partition */
crc = p4est_checksum (p4est);
p4est_partition (p4est, 0, NULL);
SC_CHECK_ABORT (p4est_checksum (p4est) == crc, "Partition");
SC_CHECK_ABORT (p4est_is_balanced (p4est, P4EST_CONNECT_FULL), "Balance 4");
/* check reset data function */
p4est_reset_data (p4est, 3, NULL, NULL);
p4est_reset_data (p4est, 3, NULL, NULL);
/* checksum and rebalance */
crc = p4est_checksum (p4est);
p4est_balance (p4est, P4EST_CONNECT_FULL, NULL);
SC_CHECK_ABORT (p4est_checksum (p4est) == crc, "Rebalance");
/* clean up and exit */
P4EST_ASSERT (p4est->user_data_pool->elem_count ==
(size_t) p4est->local_num_quadrants);
p4est_destroy (p4est);
p4est_connectivity_destroy (connectivity);
sc_finalize ();
mpiret = sc_MPI_Finalize ();
SC_CHECK_MPI (mpiret);
return 0;
}
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