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/*************************************************************************
* Copyright (C) 2010 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Test Suite. *
* *
* The Dimension Test Suite 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 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Test Suite 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 this program. If not, see <http://www.gnu.org/licenses/>. *
*************************************************************************/
#include "dimension_impl.h"
#include <sandglass.h>
#include <stdlib.h>
bool
dmnsn_fake_intersection_fn(const dmnsn_object *object, dmnsn_line line,
dmnsn_intersection *intersection)
{
intersection->t = (object->bounding_box.min.z - line.x0.z)/line.n.z;
return true;
}
void
dmnsn_randomize_bounding_box(dmnsn_object *object)
{
dmnsn_vector a, b;
a.x = 2.0*((double)rand())/RAND_MAX - 1.0;
a.y = 2.0*((double)rand())/RAND_MAX - 1.0;
a.z = 2.0*((double)rand())/RAND_MAX - 1.0;
b.x = 2.0*((double)rand())/RAND_MAX - 1.0;
b.y = 2.0*((double)rand())/RAND_MAX - 1.0;
b.z = 2.0*((double)rand())/RAND_MAX - 1.0;
object->bounding_box.min = dmnsn_vector_min(a, b);
object->bounding_box.max = dmnsn_vector_max(a, b);
}
int
main()
{
dmnsn_prtree *tree;
dmnsn_intersection intersection;
dmnsn_line ray;
const size_t nobjects = 128;
dmnsn_array *objects;
sandglass_t sandglass;
if (sandglass_init_monotonic(&sandglass, SANDGLASS_CPUTIME) != 0) {
perror("sandglass_create()");
return EXIT_FAILURE;
}
objects = dmnsn_new_array(sizeof(dmnsn_object *));
for (size_t i = 0; i < nobjects; ++i) {
dmnsn_object *object = dmnsn_new_object();
/* Generate a bounding box in (-1, -1, -1), (1, 1, 1) */
dmnsn_randomize_bounding_box(object);
object->intersection_fn = &dmnsn_fake_intersection_fn;
dmnsn_array_push(objects, &object);
}
sandglass_bench_noprecache(&sandglass, {
tree = dmnsn_new_prtree(objects);
});
printf("dmnsn_new_prtree(): %ld\n", sandglass.grains);
/* dmnsn_prtree_intersection() */
ray.x0 = dmnsn_new_vector(0.0, 0.0, -2.0);
ray.n = dmnsn_new_vector(0.0, 0.0, 1.0);
sandglass_bench_fine(&sandglass, {
dmnsn_prtree_intersection(tree, ray, &intersection);
});
printf("dmnsn_prtree_intersection(): %ld\n", sandglass.grains);
/* Cleanup */
dmnsn_delete_prtree(tree);
for (size_t i = 0; i < nobjects; ++i) {
dmnsn_object *object;
dmnsn_array_get(objects, i, &object);
dmnsn_delete_object(object);
}
dmnsn_delete_array(objects);
return EXIT_SUCCESS;
}
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