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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the QtPositioning module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-#ifndef QLOCATIONUTILS_P_H
-#define QLOCATIONUTILS_P_H
-
-//
-// W A R N I N G
-// -------------
-//
-// This file is not part of the Qt API. It exists purely as an
-// implementation detail. This header file may change from version to
-// version without notice, or even be removed.
-//
-// We mean it.
-//
-
-#include <QtCore/QtGlobal>
-#include <math.h> // needed for non-std:: versions of functions
-#include <qmath.h>
-#include <QtPositioning/QGeoCoordinate>
-#include <QtPositioning/QNmeaSatelliteInfoSource>
-#include <QtPositioning/private/qpositioningglobal_p.h>
-
-static const double offsetEpsilon = 1e-12; // = 0.000000000001
-static const double leftOffset = -180.0 + offsetEpsilon;
-static const double rightOffset = 180.0 - offsetEpsilon;
-
-QT_BEGIN_NAMESPACE
-class QTime;
-class QByteArray;
-
-class QGeoPositionInfo;
-class QGeoSatelliteInfo;
-class Q_POSITIONING_PRIVATE_EXPORT QLocationUtils
-{
-public:
- enum CardinalDirection {
- CardinalN,
- CardinalE,
- CardinalS,
- CardinalW,
- CardinalNE,
- CardinalSE,
- CardinalSW,
- CardinalNW,
- CardinalNNE,
- CardinalENE,
- CardinalESE,
- CardinalSSE,
- CardinalSSW,
- CardinalWSW,
- CardinalWNW,
- CardinalNNW
- };
-
- enum NmeaSentence {
- NmeaSentenceInvalid,
- NmeaSentenceGGA, // Fix information
- NmeaSentenceGSA, // Overall Satellite data, such as HDOP and VDOP
- NmeaSentenceGLL, // Lat/Lon data
- NmeaSentenceRMC, // Recommended minimum data for gps
- NmeaSentenceVTG, // Vector track an Speed over the Ground
- NmeaSentenceZDA, // Date and Time
- NmeaSentenceGSV // Per-Satellite Info
- };
-
- inline static bool isValidLat(double lat) {
- return lat >= -90.0 && lat <= 90.0;
- }
- inline static bool isValidLong(double lng) {
- return lng >= -180.0 && lng <= 180.0;
- }
-
- inline static double clipLat(double lat, double clipValue = 90.0) {
- if (lat > clipValue)
- lat = clipValue;
- else if (lat < -clipValue)
- lat = -clipValue;
- return lat;
- }
-
- inline static double wrapLong(double lng) {
- if (lng > 180.0)
- lng -= 360.0;
- else if (lng < -180.0)
- lng += 360.0;
- return lng;
- }
-
- inline static CardinalDirection azimuthToCardinalDirection4(double azimuth)
- {
- azimuth = fmod(azimuth, 360.0);
- if (azimuth < 45.0 || azimuth > 315.0 )
- return CardinalN;
- else if (azimuth < 135.0)
- return CardinalE;
- else if (azimuth < 225.0)
- return CardinalS;
- else
- return CardinalW;
- }
-
- inline static CardinalDirection azimuthToCardinalDirection8(double azimuth)
- {
- azimuth = fmod(azimuth, 360.0);
- if (azimuth < 22.5 || azimuth > 337.5 )
- return CardinalN;
- else if (azimuth < 67.5)
- return CardinalNE;
- else if (azimuth < 112.5)
- return CardinalE;
- else if (azimuth < 157.5)
- return CardinalSE;
- else if (azimuth < 202.5)
- return CardinalS;
-
- else if (azimuth < 247.5)
- return CardinalSW;
- else if (azimuth < 292.5)
- return CardinalW;
- else
- return CardinalNW;
- }
-
- inline static CardinalDirection azimuthToCardinalDirection16(double azimuth)
- {
- azimuth = fmod(azimuth, 360.0);
- if (azimuth < 11.5 || azimuth > 348.75 )
- return CardinalN;
- else if (azimuth < 33.75)
- return CardinalNNE;
- else if (azimuth < 56.25)
- return CardinalNE;
- else if (azimuth < 78.75)
- return CardinalENE;
- else if (azimuth < 101.25)
- return CardinalE;
- else if (azimuth < 123.75)
- return CardinalESE;
- else if (azimuth < 146.25)
- return CardinalSE;
- else if (azimuth < 168.75)
- return CardinalSSE;
- else if (azimuth < 191.25)
- return CardinalS;
-
- else if (azimuth < 213.75)
- return CardinalSSW;
- else if (azimuth < 236.25)
- return CardinalSW;
- else if (azimuth < 258.75)
- return CardinalWSW;
- else if (azimuth < 281.25)
- return CardinalW;
- else if (azimuth < 303.75)
- return CardinalWNW;
- else if (azimuth < 326.25)
- return CardinalNW;
- else
- return CardinalNNW;
- }
-
- // For values exceeding +- 720.0
- inline static double wrapLongExt(double lng) {
- double remainder = fmod(lng + 180.0, 360.0);
- return fmod(remainder + 360.0, 360.0) - 180.0;
- }
-
- // Mirrors the azimuth against the X axis. Azimuth assumed to be in [0,360[
- inline static double mirrorAzimuthX(double azimuth) {
- if (azimuth <= 90.0)
- return 180.0 - azimuth;
- else
- return 180.0 + (360.0 - azimuth);
- }
-
- // Mirrors the azimuth against the Y axis. Azimuth assumed to be in [0,360[
- inline static double mirrorAzimuthY(double azimuth) {
- if (azimuth == 0.0)
- return 0.0;
- return 360.0 - azimuth;
- }
-
- inline static double radians(double degrees)
- {
- return qDegreesToRadians(degrees);
- }
-
- inline static double degrees(double radians)
- {
- return qRadiansToDegrees(radians);
- }
-
- inline static double earthMeanRadius()
- {
- return 6371007.2;
- }
-
- inline static double earthMeanCircumference()
- {
- return earthMeanRadius() * 2.0 * M_PI;
- }
-
- inline static double mercatorMaxLatitude()
- {
- return 85.05113;
- }
-
- inline static QGeoCoordinate antipodalPoint(const QGeoCoordinate &p)
- {
- return QGeoCoordinate(-p.latitude(), wrapLong(p.longitude() + 180.0));
- }
-
- // Leftmost longitude before wrapping kicks in
- inline static double mapLeftLongitude(double centerLongitude)
- {
- return wrapLong(centerLongitude + leftOffset);
- }
-
- // Rightmost longitude before wrapping kicks in
- inline static double mapRightLongitude(double centerLongitude)
- {
- return wrapLong(centerLongitude - leftOffset);
- }
-
- inline static void split_double(double input, float *hipart, float *lopart)
- {
- *hipart = (float) input;
- double delta = input - ((double) *hipart);
- *lopart = (float) delta;
- }
-
- static qreal metersPerPixel(qreal zoomLevel, const QGeoCoordinate &coordinate)
- {
- const qreal metersPerTile = earthMeanCircumference() * std::cos(radians(coordinate.latitude())) / std::pow(2, zoomLevel);
- return metersPerTile / 256.0;
- }
-
- /*
- returns the NMEA sentence type.
- */
- static NmeaSentence getNmeaSentenceType(const char *data, int size);
-
- /*
- Returns the satellite system type based on the message type.
- See https://gpsd.gitlab.io/gpsd/NMEA.html#_talker_ids for reference
- */
- static QGeoSatelliteInfo::SatelliteSystem getSatelliteSystem(const char *data, int size);
-
- /*
- Returns the satellite system type based on the satellite id.
- See https://gpsd.gitlab.io/gpsd/NMEA.html#_satellite_ids for reference
- */
- static QGeoSatelliteInfo::SatelliteSystem getSatelliteSystemBySatelliteId(int satId);
-
- /*
- Creates a QGeoPositionInfo from a GGA, GLL, RMC, VTG or ZDA sentence.
-
- Note:
- - GGA and GLL sentences have time but not date so the update's
- QDateTime object will have an invalid date.
- - RMC reports date with a two-digit year so in this case the year
- is assumed to be after the year 2000.
- */
- static bool getPosInfoFromNmea(const char *data,
- int size,
- QGeoPositionInfo *info, double uere,
- bool *hasFix = nullptr);
-
- /*
- Retruns a list of QGeoSatelliteInfo in the view.
-
- Note: this function has to be called repeatedly until it returns
- QNmeaSatelliteInfoSource::FullyParsed.
- Reason being that GSV sentences can be split into multiple samples, so
- getting the full data requires parsing multiple sentences.
- */
- static QNmeaSatelliteInfoSource::SatelliteInfoParseStatus
- getSatInfoFromNmea(const char *data, int size, QList<QGeoSatelliteInfo> &infos, QGeoSatelliteInfo::SatelliteSystem &system);
-
- /*
- Parses GSA for satellites in use.
-
- Returns satellite system type or QGeoSatelliteInfo::Undefined if parsing
- failed
- */
- static QGeoSatelliteInfo::SatelliteSystem getSatInUseFromNmea(const char *data, int size,
- QList<int> &pnrsInUse);
-
- /*
- Returns true if the given NMEA sentence has a valid checksum.
- */
- static bool hasValidNmeaChecksum(const char *data, int size);
-
- /*
- Returns time from a string in hhmmss or hhmmss.z+ format.
- */
- static bool getNmeaTime(const QByteArray &bytes, QTime *time);
-
- /*
- Accepts for example ("2734.7964", 'S', "15306.0124", 'E') and returns the
- lat-long values. Fails if lat or long fail isValidLat() or isValidLong().
- */
- static bool getNmeaLatLong(const QByteArray &latString,
- char latDirection,
- const QByteArray &lngString,
- char lngDirection,
- double *lat,
- double *lon);
-};
-
-QT_END_NAMESPACE
-
-#endif
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