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https://github.com/tumic0/GPXSee.git
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99 lines
2.1 KiB
C++
99 lines
2.1 KiB
C++
#include <QFile>
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#include <QDebug>
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#include "common/wgs84.h"
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#include "common/csv.h"
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#include "ellipsoid.h"
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QMap<int, Ellipsoid> Ellipsoid::_ellipsoids = defaults();
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const Ellipsoid &Ellipsoid::WGS84()
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{
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static Ellipsoid e(WGS84_RADIUS, WGS84_FLATTENING);
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return e;
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}
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QMap<int, Ellipsoid> Ellipsoid::defaults()
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{
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QMap<int, Ellipsoid> map;
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map.insert(7030, WGS84());
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return map;
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}
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const Ellipsoid &Ellipsoid::ellipsoid(int id)
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{
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QMap<int, Ellipsoid>::const_iterator it(_ellipsoids.find(id));
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static const Ellipsoid null;
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if (it == _ellipsoids.constEnd())
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return null;
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else
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return it.value();
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}
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bool Ellipsoid::loadList(const QString &path)
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{
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QFile file(path);
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CSV csv(&file);
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QByteArrayList entry;
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bool res;
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if (!file.open(QFile::ReadOnly)) {
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qWarning("Error opening ellipsoids file: %s: %s", qPrintable(path),
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qPrintable(file.errorString()));
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return false;
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}
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while (!csv.atEnd()) {
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if (!csv.readEntry(entry)) {
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qWarning("%s:%d: Parse error", qPrintable(path), csv.line());
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return false;
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}
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if (entry.size() < 4) {
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qWarning("%s:%d: Invalid column count", qPrintable(path),
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csv.line() - 1);
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return false;
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}
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int id = entry.at(1).toInt(&res);
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if (!res) {
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qWarning("%s:%d: Invalid ellipsoid code", qPrintable(path),
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csv.line() - 1);
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continue;
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}
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double radius = entry.at(2).toDouble(&res);
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if (!res) {
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qWarning("%s:%d: Invalid radius", qPrintable(path),
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csv.line() - 1);
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continue;
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}
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double flattening = entry.at(3).toDouble(&res);
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if (!res) {
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qWarning("%s:%d: Invalid flattening", qPrintable(path),
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csv.line() - 1);
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continue;
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}
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Ellipsoid e(radius, 1.0/flattening);
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_ellipsoids.insert(id, e);
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}
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return true;
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}
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Ellipsoid::Ellipsoid(double radius, double flattening)
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: _radius(radius), _flattening(flattening)
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{
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_es = 2.0 * flattening - flattening * flattening;
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_e2s = (1.0 / (1.0 - _es)) - 1.0;
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_b = radius * (1.0 - flattening);
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}
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#ifndef QT_NO_DEBUG
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QDebug operator<<(QDebug dbg, const Ellipsoid &ellipsoid)
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{
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dbg.nospace() << "Ellipsoid(" << ellipsoid.radius() << ", "
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<< 1.0 / ellipsoid.flattening() << ")";
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return dbg.space();
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}
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#endif // QT_NO_DEBUG
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