v0.2.48..v0.2.49 changeset GenerateAlphaShapeCmd.cpp

diff --git a/hoot-core/src/main/cpp/hoot/core/cmd/GenerateAlphaShapeCmd.cpp b/hoot-core/src/main/cpp/hoot/core/cmd/GenerateAlphaShapeCmd.cpp
new file mode 100644
index 0000000..fe8314d
--- /dev/null
+++ b/hoot-core/src/main/cpp/hoot/core/cmd/GenerateAlphaShapeCmd.cpp
@@ -0,0 +1,95 @@
+/*
+ * 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, 2016, 2017, 2018, 2019 DigitalGlobe (http://www.digitalglobe.com/)
+ */
+
+// GEOS
+#include <geos/geom/GeometryFactory.h>
+
+// Hoot
+#include <hoot/core/util/Factory.h>
+#include <hoot/core/util/MapProjector.h>
+#include <hoot/core/cmd/BaseCommand.h>
+#include <hoot/core/io/ShapefileWriter.h>
+#include <hoot/core/algorithms/alpha-shape/AlphaShapeGenerator.h>
+#include <hoot/core/util/Log.h>
+#include <hoot/core/util/IoUtils.h>
+
+namespace hoot
+{
+using namespace std;
+
+class GenerateAlphaShapeCmd : public BaseCommand
+{
+public:
+
+  static string className() { return "hoot::GenerateAlphaShapeCmd"; }
+
+  GenerateAlphaShapeCmd() {}
+
+  virtual QString getName() const override { return "generate-alpha-shape"; }
+
+  virtual QString getDescription() const override
+  { return "Generates a concave hull for a set of points; useful in cookie cutting"; }
+
+  virtual int runSimple(QStringList& args) override
+  {
+    if (args.size() != 4)
+    {
+      cout << getHelp() << endl << endl;
+      throw HootException(QString("%1 takes four parameters.").arg(getName()));
+    }
+    int i = 0;
+    QString pointsPath = args[i++];
+    double alpha = args[i++].toDouble();
+    double buffer = args[i++].toDouble();
+    QString outputPath = args[i++];
+
+    OsmMapPtr pointsMap(new OsmMap());
+    IoUtils::loadMap(pointsMap, pointsPath, false, Status::Unknown1);
+
+    OsmMapPtr result = AlphaShapeGenerator(alpha, buffer).generateMap(pointsMap);
+
+    // reproject back into lat/lng
+    MapProjector::projectToWgs84(result);
+
+    // save out the result.
+    if (outputPath.toLower().endsWith(".shp"))
+    {
+      ShapefileWriter writer;
+      writer.writePolygons(result, outputPath);
+    }
+    else
+    {
+      IoUtils::saveMap(result, outputPath);
+    }
+
+    return 0;
+  }
+};
+
+HOOT_FACTORY_REGISTER(Command, GenerateAlphaShapeCmd)
+
+}