GPSProtocolMath.h File Reference

#include <cmath>
#include <cstdint>
#include <ctime>
#include <limits>
#include <numbers>
#include <optional>
#include <QtCore/QByteArray>
#include "GPSReceiverConfig.h"

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Classes
struct	GPSProtocolMath::Ecef

Namespaces
namespace	GPSProtocolMath
	Unit conversions and geodesy shared by receiver families and their callers.

Functions
constexpr double	GPSProtocolMath::degreesFromE7 (int32_t value)
	Degrees of a coordinate in 1e-7 degree units, as u-blox and MAVLink send them.
constexpr double	GPSProtocolMath::metersFromMillimeters (int32_t value)
double	GPSProtocolMath::roundedToMillimeters (double meters)
	meters rounded to whole millimetres.
std::optional< uint32_t >	GPSProtocolMath::tenthMillimeters (double meters)
	meters in 0.1 mm, truncated toward zero. Empty when not finite, negative or beyond a 32-bit unsigned field.
Ecef	GPSProtocolMath::toEcef (const GPSEllipsoidPosition &position)
GPSEllipsoidPosition	GPSProtocolMath::fromEcef (const Ecef &position)
double	GPSProtocolMath::distance (const Ecef &left, const Ecef &right)
	Straight-line distance between left and right, in metres.
bool	GPSProtocolMath::nearEarthSurface (const Ecef &position)
uint64_t	GPSProtocolMath::utcMicroseconds (int year, int month, int day, int hour, int minute, int second, int32_t nsec)
QByteArray	gpsFixedDecimal (double value, int decimals)

Variables
constexpr double	GPSProtocolMath::DEG_TO_RAD = std::numbers::pi / 180.0
constexpr double	GPSProtocolMath::RAD_TO_DEG = 180.0 / std::numbers::pi
constexpr time_t	GPSProtocolMath::UTC_PLAUSIBILITY_FLOOR_SECS = static_cast<time_t>(1234567890ULL)
	Receiver dates before this instant (2009-02-13) are implausible and reported as unknown.

Function Documentation

gpsFixedDecimal()

QByteArray gpsFixedDecimal	(	double	value,
		int	decimals
	)

Formats value as printf's "%.<decimals>f" does in the C locale: exact binary ties round to even and a negative zero keeps its sign. QByteArray::number() does neither, and would change the command bytes for such values.

Definition at line 65 of file GPSProtocolMath.cc.

Referenced by SBF::Plan::base(), Femto::Plan::fixedBase(), Unicore::Plan::fixedBase(), Ashtech::Plan::fixedPosition(), and Quectel::Plan::writeBase().