v0.2.48..v0.2.49 changeset RandomWayGeneralizer.cpp

diff --git a/hoot-core/src/main/cpp/hoot/core/visitors/RandomWayGeneralizer.cpp b/hoot-core/src/main/cpp/hoot/core/visitors/RandomWayGeneralizer.cpp
new file mode 100644
index 0000000..f376a7c
--- /dev/null
+++ b/hoot-core/src/main/cpp/hoot/core/visitors/RandomWayGeneralizer.cpp
@@ -0,0 +1,115 @@
+/*
+ * This file is part of Hootenanny.
+ *
+ * Hootenanny 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.
+ *
+ * This program 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/>.
+ *
+ * --------------------------------------------------------------------
+ *
+ * The following copyright notices are generated automatically. If you
+ * have a new notice to add, please use the format:
+ * " * @copyright Copyright ..."
+ * This will properly maintain the copyright information. DigitalGlobe
+ * copyrights will be updated automatically.
+ *
+ * @copyright Copyright (C) 2015, 2017, 2018, 2019 DigitalGlobe (http://www.digitalglobe.com/)
+ */
+#include "RandomWayGeneralizer.h"
+
+// boost
+#include <boost/random/uniform_real.hpp>
+#include <boost/random/uniform_int.hpp>
+
+// hoot
+#include <hoot/core/util/Factory.h>
+#include <hoot/core/elements/OsmMap.h>
+#include <hoot/core/util/ConfigOptions.h>
+#include <hoot/core/util/RandomNumberUtils.h>
+#include <hoot/core/algorithms/RdpWayGeneralizer.h>
+#include <hoot/core/util/MapProjector.h>
+
+namespace hoot
+{
+
+HOOT_FACTORY_REGISTER(ElementVisitor, RandomWayGeneralizer)
+
+RandomWayGeneralizer::RandomWayGeneralizer() :
+_epsilon(1.0)
+{
+  _localRng.reset(new boost::minstd_rand());
+  _rng = _localRng.get();
+}
+
+void RandomWayGeneralizer::setConfiguration(const Settings& conf)
+{
+  ConfigOptions configOptions(conf);
+  setWayGeneralizeProbability(configOptions.getRandomWayGeneralizerProbability());
+  setEpsilon(configOptions.getWayGeneralizerEpsilon());
+  const int seed = configOptions.getRandomSeed();
+  LOG_VARD(seed);
+  if (seed == -1)
+  {
+    _rng->seed(RandomNumberUtils::generateSeed());
+  }
+  else
+  {
+    _rng->seed(seed);
+  }
+}
+
+void RandomWayGeneralizer::setOsmMap(OsmMap* map)
+{
+  _map = map;
+  MapProjector::projectToPlanar(_map->shared_from_this());
+
+  assert(_epsilon != -1.0);
+  _generalizer.reset(new RdpWayGeneralizer(_epsilon));
+  _generalizer->setOsmMap(_map);
+}
+
+void RandomWayGeneralizer::visit(const std::shared_ptr<Element>& element)
+{
+  if (element->getElementType() == ElementType::Way)
+  {
+    if (!_map)
+    {
+      throw IllegalArgumentException("No map passed to way generalizer.");
+    }
+    else if (_map->getProjection()->IsGeographic())
+    {
+      throw IllegalArgumentException("Input map must be projected to planar.");
+    }
+
+    //randomly select ways to generalize
+    boost::uniform_real<> randomGeneralizeDistribution(0.0, 1.0);
+    const double randomNum = randomGeneralizeDistribution(*_rng);
+    QString logMsg =
+      QString("element: %1 %2 be generalized based on a probability of: %3 and a randomly generated number: %4 \n")
+        .arg(element->getElementId().toString())
+        .arg("*will*")
+        .arg(QString::number(_wayGeneralizeProbability))
+        .arg(QString::number(randomNum));
+    if (randomNum <= _wayGeneralizeProbability)
+    {
+      LOG_TRACE(logMsg);
+      _generalizer->generalize(std::dynamic_pointer_cast<Way>(element));
+    }
+    else
+    {
+      logMsg = logMsg.replace("will", "will not");
+      LOG_TRACE(logMsg);
+    }
+  }
+}
+
+}