tst_qwebmercator.cpp

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// Copyright (C) 2023 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#include <QtPositioning/QGeoCoordinate>

#include <QtPositioning/private/qdoublevector2d_p.h>

#include <QtPositioning/private/qwebmercator_p.h>

#include <qtest.h>

QT_USE_NAMESPACE

class tst_qwebmercator : public QObject

    Q_OBJECT

private:

    void transformForwardAndBackward(double lat, double lon)

        QGeoCoordinate c(lat, lon);

        QDoubleVector2D cmap = QWebMercator().coordToMercator(c);

        QGeoCoordinate c1 = QWebMercator().mercatorToCoord(cmap);

        QCOMPARE(c1.latitude(), c.latitude());

        QCOMPARE(c1.longitude(), c.longitude());

private slots:

    void transformForwardAndBackward()

        transformForwardAndBackward(0, 0);

        // transformForwardAndBackward(42,180); //Will fail.

        for (double lon=-180; lon<181; lon += 22/3.) {

            for (double lat=-90; lat<91; lat += 22/3.)

                transformForwardAndBackward(lat, lon);

        for (double eps = 1.0; eps > 1e-12; eps /= 10.0) {

            transformForwardAndBackward(-90 + eps, 0.0);

            transformForwardAndBackward(90 - eps, 0.0);

};

QTEST_GUILESS_MAIN(tst_qwebmercator)

#include "tst_qwebmercator.moc"