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https://github.com/tumic0/GPXSee.git
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93 lines
1.8 KiB
C++
93 lines
1.8 KiB
C++
#include "common/util.h"
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#include "angularunits.h"
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static double sDMS2deg(double val)
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{
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double angle;
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const char *decimal;
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QString qstr(QString::number(qAbs(val), 'f', 7));
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QByteArray ba = qstr.toLatin1();
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const char *str = ba.constData();
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decimal = strrchr(str, '.');
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int deg = Util::str2int(str, decimal - str);
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int min = Util::str2int(decimal + 1, 2);
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int sec = Util::str2int(decimal + 3, 2);
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int f = Util::str2int(decimal + 5, 3);
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angle = deg + min/60.0 + sec/3600.0 + (f/1000.0)/3600.0;
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return (val < 0) ? -angle : angle;
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}
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static double deg2sDMS(double val)
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{
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double aval = qAbs(val);
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int deg = aval;
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double r1 = aval - deg;
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int min = r1 * 60.0;
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double r2 = r1 - (min / 60.0);
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int sec = r2 * 3600.0;
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double r3 = r2 - (sec / 3600.0);
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int f = (int)(r3 * 3600.0 * 1000.0);
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QString str(QString("%1.%2%3%4").arg(deg).arg(min, 2, 10, QChar('0'))
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.arg(sec, 2, 10, QChar('0')).arg(f, 3, 10, QChar('0')));
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return (val < 0) ? -str.toDouble() : str.toDouble();
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}
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AngularUnits::AngularUnits(int code) : _code(code)
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{
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switch (code) {
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case 9101:
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_f = 180.0 / M_PI;
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break;
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case 9102:
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case 9107:
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case 9108:
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case 9110:
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case 9122:
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_f = 1.0;
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break;
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case 9103:
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_f = 1 / 60.0;
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break;
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case 9104:
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_f = 1 / 3600.0;
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break;
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case 9105:
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_f = 180.0 / 200.0;
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break;
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case 9106:
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_f = 180.0 / 200.0;
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break;
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case 9109:
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_f = 180.0 / (M_PI * 1000000.0);
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break;
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default:
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_f = NAN;
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}
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}
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double AngularUnits::toDegrees(double val) const
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{
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return (_code == 9110) ? sDMS2deg(val) : val * _f;
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}
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double AngularUnits::fromDegrees(double val) const
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{
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return (_code == 9110) ? deg2sDMS(val) : val / _f;
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}
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#ifndef QT_NO_DEBUG
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QDebug operator<<(QDebug dbg, const AngularUnits &au)
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{
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dbg.nospace() << "AngularUnits(" << deg2rad(au._f) << ")";
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return dbg.space();
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}
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#endif // QT_NO_DEBUG
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