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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 "../../libdimension/dimension_impl.h"
#include <sandglass.h>
#include <stdlib.h>
dmnsn_intersection *
dmnsn_fake_intersection_fn(const dmnsn_object *object, dmnsn_line line)
{
dmnsn_intersection *intersection = dmnsn_new_intersection();
intersection->t = (object->bounding_box.min.z - line.x0.z)/line.n.z;
intersection->texture = object->texture;
return intersection;
}
void
dmnsn_randomize_bounding_box(dmnsn_object *object)
{
double rand1, rand2;
rand1 = 2.0*((double)rand())/RAND_MAX - 1.0;
rand2 = 2.0*((double)rand())/RAND_MAX - 1.0;
if (rand1 < rand2) {
object->bounding_box.min.x = rand1;
object->bounding_box.max.x = rand2;
} else {
object->bounding_box.max.x = rand1;
object->bounding_box.min.x = rand2;
}
rand1 = 2.0*((double)rand())/RAND_MAX - 1.0;
rand2 = 2.0*((double)rand())/RAND_MAX - 1.0;
if (rand1 < rand2) {
object->bounding_box.min.y = rand1;
object->bounding_box.max.y = rand2;
} else {
object->bounding_box.max.y = rand1;
object->bounding_box.min.y = rand2;
}
rand1 = 2.0*((double)rand())/RAND_MAX - 1.0;
rand2 = 2.0*((double)rand())/RAND_MAX - 1.0;
if (rand1 < rand2) {
object->bounding_box.min.z = rand1;
object->bounding_box.max.z = rand2;
} else {
object->bounding_box.max.z = rand1;
object->bounding_box.min.z = rand2;
}
}
dmnsn_bvst_node *
dmnsn_bvst_deepest_recursive(dmnsn_bvst_node *node,
unsigned int depth, unsigned int *deepest)
{
dmnsn_bvst_node *left = NULL, *right = NULL;
if (node->contains) {
left = dmnsn_bvst_deepest_recursive(node->contains, depth + 1, deepest);
}
if (node->container) {
right = dmnsn_bvst_deepest_recursive(node->container,
depth + 1, deepest);
}
if (right) {
return right;
} else if (left) {
return left;
} else if (depth >= *deepest) {
*deepest = depth;
return node;
} else {
return NULL;
}
}
dmnsn_bvst_node *
dmnsn_bvst_deepest(dmnsn_bvst *tree)
{
unsigned int deepest = 0;
return dmnsn_bvst_deepest_recursive(tree->root, 0, &deepest);
}
int
main()
{
dmnsn_bvst *tree;
dmnsn_bvst_node *node;
dmnsn_intersection *intersection;
dmnsn_line ray;
const unsigned int nobjects = 128;
dmnsn_object *objects[nobjects];
unsigned int i;
long grains;
sandglass_t sandglass;
if (sandglass_init_monotonic(&sandglass, SANDGLASS_CPUTIME) != 0) {
perror("sandglass_create()");
return EXIT_FAILURE;
}
tree = dmnsn_new_bvst();
for (i = 0; i < nobjects; ++i) {
objects[i] = dmnsn_new_object();
/* Generate a bounding box in (-1, -1, -1), (1, 1, 1) */
dmnsn_randomize_bounding_box(objects[i]);
objects[i]->intersection_fn = &dmnsn_fake_intersection_fn;
}
/* dmnsn_bvst_insert() */
grains = 0;
for (i = 0; i < nobjects; ++i) {
sandglass_bench_noprecache(&sandglass,
dmnsn_bvst_insert(tree, objects[i]));
sandglass.grains += grains;
grains = sandglass.grains;
}
printf("dmnsn_bvst_insert(): %ld\n", sandglass.grains/nobjects);
/* dmnsn_bvst_search() */
ray.x0 = dmnsn_new_vector(0.0, 0.0, -2.0);
ray.n = dmnsn_new_vector(0.0, 0.0, 1.0);
dmnsn_delete_intersection((*objects[0]->intersection_fn)(objects[0], ray));
sandglass_bench_noprecache(&sandglass, {
intersection = dmnsn_bvst_search(tree, ray);
});
dmnsn_delete_intersection(intersection);
printf("dmnsn_bvst_search(): %ld\n", sandglass.grains);
/* dmnsn_bvst_splay() */
grains = 0;
for (i = 0; i < nobjects; ++i) {
node = dmnsn_bvst_deepest(tree);
sandglass_bench_noprecache(&sandglass, dmnsn_bvst_splay(tree, node));
sandglass.grains += grains;
grains = sandglass.grains;
}
printf("dmnsn_bvst_splay(): %ld\n", sandglass.grains/nobjects);
/* Cleanup */
dmnsn_delete_bvst(tree);
for (i = 0; i < nobjects; ++i) {
dmnsn_delete_object(objects[i]);
}
return EXIT_SUCCESS;
}
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