mirror of
https://github.com/tumic0/GPXSee.git
synced 2024-12-11 03:29:09 +01:00
76 lines
1.1 KiB
C++
76 lines
1.1 KiB
C++
#include "primemeridian.h"
|
|
|
|
static double shift(double lon, double offset)
|
|
{
|
|
double ret = lon + offset;
|
|
|
|
if (ret > 180.0)
|
|
ret -= 360.0;
|
|
if (ret < -180)
|
|
ret += 360.0;
|
|
|
|
return ret;
|
|
}
|
|
|
|
PrimeMeridian::PrimeMeridian(int code)
|
|
{
|
|
switch (code) {
|
|
case 8901:
|
|
_pm = 0.0;
|
|
break;
|
|
case 8902:
|
|
_pm = -9.1319061111;
|
|
break;
|
|
case 8903:
|
|
_pm = 2.3372291666;
|
|
break;
|
|
case 8904:
|
|
_pm = -74.0809166666;
|
|
break;
|
|
case 8905:
|
|
_pm = -3.6879388888;
|
|
break;
|
|
case 8906:
|
|
_pm = 12.4523333333;
|
|
break;
|
|
case 8907:
|
|
_pm = 7.4395833333;
|
|
break;
|
|
case 8908:
|
|
_pm = 106.8077194444;
|
|
break;
|
|
case 8909:
|
|
_pm = -17.6666666666;
|
|
break;
|
|
case 8910:
|
|
_pm = 4.3679750000;
|
|
break;
|
|
case 8911:
|
|
_pm = 18.0582777777;
|
|
break;
|
|
case 8913:
|
|
_pm = 10.7229166666;
|
|
break;
|
|
default:
|
|
_pm = NAN;
|
|
}
|
|
}
|
|
|
|
double PrimeMeridian::toGreenwich(double val) const
|
|
{
|
|
return shift(val, _pm);
|
|
}
|
|
|
|
double PrimeMeridian::fromGreenwich(double val) const
|
|
{
|
|
return shift(val, -_pm);
|
|
}
|
|
|
|
#ifndef QT_NO_DEBUG
|
|
QDebug operator<<(QDebug dbg, const PrimeMeridian &pm)
|
|
{
|
|
dbg.nospace() << "PrimeMeridian(" << pm._pm << ")";
|
|
return dbg.space();
|
|
}
|
|
#endif // QT_NO_DEBUG
|