From a5a6b94c038e01ebf1e2de0a0774a69b02fb8e1e Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@gmail.com>
Date: Sun, 15 May 2011 15:54:56 -0600
Subject: Group tests and benchmarks with the corresponding source code.

---
 libdimension/bench/prtree.c | 119 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 libdimension/bench/prtree.c

(limited to 'libdimension/bench/prtree.c')

diff --git a/libdimension/bench/prtree.c b/libdimension/bench/prtree.c
new file mode 100644
index 0000000..b6f778a
--- /dev/null
+++ b/libdimension/bench/prtree.c
@@ -0,0 +1,119 @@
+/*************************************************************************
+ * Copyright (C) 2009-2011 Tavian Barnes <tavianator@tavianator.com>     *
+ *                                                                       *
+ * This file is part of The Dimension Benchmark Suite.                   *
+ *                                                                       *
+ * The Dimension Benchmark 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 Benchmark 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>
+
+static 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;
+  intersection->normal = dmnsn_x;
+  return true;
+}
+
+static bool
+dmnsn_fake_inside_fn(const dmnsn_object *object, dmnsn_vector point)
+{
+  return true;
+}
+
+static 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);
+}
+
+static dmnsn_object *
+dmnsn_new_fake_object(void)
+{
+  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;
+  object->inside_fn       = dmnsn_fake_inside_fn;
+  return object;
+}
+
+int
+main(void)
+{
+  const size_t nobjects = 10000;
+
+  sandglass_t sandglass;
+  if (sandglass_init_monotonic(&sandglass, SANDGLASS_CPUTIME) != 0) {
+    perror("sandglass_create()");
+    return EXIT_FAILURE;
+  }
+
+  dmnsn_array *objects = dmnsn_new_array(sizeof(dmnsn_object *));
+  for (size_t i = 0; i < nobjects; ++i) {
+    dmnsn_object *object = dmnsn_new_fake_object();
+    dmnsn_initialize_object(object);
+    dmnsn_array_push(objects, &object);
+  }
+
+  dmnsn_prtree *tree;
+  sandglass_bench_noprecache(&sandglass, {
+    tree = dmnsn_new_prtree(objects);
+  });
+  printf("dmnsn_new_prtree(): %ld\n", sandglass.grains);
+
+  /* dmnsn_prtree_intersection() */
+  dmnsn_line ray = dmnsn_new_line(
+    dmnsn_new_vector( 1.0,  1.0, -2.0),
+    dmnsn_new_vector(-0.5, -0.5,  1.0)
+  );
+  dmnsn_intersection intersection;
+
+  sandglass_bench_fine(&sandglass, {
+    dmnsn_prtree_intersection(tree, ray, &intersection, true);
+  });
+  printf("dmnsn_prtree_intersection(): %ld\n", sandglass.grains);
+
+  /* dmnsn_prtree_inside() */
+  sandglass_bench_fine(&sandglass, {
+    dmnsn_prtree_inside(tree, dmnsn_zero);
+  });
+  printf("dmnsn_prtree_inside(): %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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