Had to withdraw 3Vector3D, since they store values internally as float (idiotic design). Hence qreal will be dropped. Started with Unit tests.

samples/blackmiscvectorgeo/samplesgeodetictoecef.cpp

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+/*  Copyright (C) 2013 VATSIM Community / contributors
+ *  This Source Code Form is subject to the terms of the Mozilla Public
+ *  License, v. 2.0. If a copy of the MPL was not distributed with this
+ *  file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "samplesgeodetictoecef.h"
+#include <QElapsedTimer>
+
+using namespace BlackMisc::Geo;
+
+namespace BlackMiscTest
+{
+
+/*
+ * Samples
+ */
+int CSamplesGeodeticToEcef::samples()
+{
+
+    QElapsedTimer timer;
+    qint64 duration;
+
+    double lat = 27.999999, lon = 86.999999, h = 8820.999999; // Mt Everest
+    CCoordinateGeodetic startVec(lat, lon, h);
+    std::cout << startVec << std::endl;
+
+    timer.start();
+    CCoordinateEcef mediumvec = CCoordinateTransformation::toEcef(startVec);
+    duration = timer.nsecsElapsed();
+    std::cout << mediumvec << " ";
+    std::cout << "Needed " << duration << " nanoseconds for the calculation!" << std::endl;
+
+    timer.restart();
+    CCoordinateGeodetic endVec = CCoordinateTransformation::toGeodetic(mediumvec);
+    duration = timer.nsecsElapsed();
+
+    std::cout << endVec << " ";
+    std::cout << "Needed " << duration << " nanoseconds for the calculation!" << std::endl;
+
+    std::cout << "-----------------------------------------------" << std::endl;
+    return 0;
+}
+
+} // namespace