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Physical constants support redesigned

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This commit is contained in:
Mateusz Pusz
2020-03-17 17:13:18 +01:00
parent d2e49b25f7
commit 45888ac44e
4 changed files with 37 additions and 16 deletions
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2
example/box_example.cpp
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@@ -20,7 +20,7 @@ using N = si::newton;
using m3 = si::cubic_metre;
using kgpm3 = si::kilogram_per_metre_cub;
inline constexpr auto g = si::standard_gravity;
inline constexpr auto g = si::si2019::standard_gravity<>;
} // namespace

8
example/total_energy.cpp
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@@ -42,12 +42,12 @@ void si_example()
using namespace si;
using GeV = gigaelectronvolt;
constexpr Velocity AUTO c = speed_of_light;
constexpr Velocity AUTO c = si2019::speed_of_light<>;
std::cout << "\n*** SI units (c = " << c << ") ***\n";
const Momentum AUTO p = 4.q_GeV / speed_of_light;
const Mass AUTO m = 3.q_GeV / pow<2>(speed_of_light);
const Momentum AUTO p = 4.q_GeV / c;
const Mass AUTO m = 3.q_GeV / pow<2>(c);
const Energy AUTO E = total_energy(p, m, c);
std::cout << "[in GeV]\n"
@@ -73,7 +73,7 @@ void natural_example()
using namespace natural;
using GeV = gigaelectronvolt;
constexpr Velocity AUTO c = speed_of_light;
constexpr Velocity AUTO c = speed_of_light<>;
const momentum<GeV> p(4);
const mass<GeV> m(3);
const Energy AUTO E = total_energy(p, m, c);

3
src/include/units/physical/natural/constants.h
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@@ -26,6 +26,7 @@
namespace units::natural {
inline constexpr auto speed_of_light = velocity<unitless>(1);
template<Scalar Rep = double>
inline constexpr auto speed_of_light = velocity<unitless, Rep>(1);
} // namespace units::natural

40
src/include/units/physical/si/constants.h
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@@ -23,24 +23,44 @@
#pragma once
#include <units/physical/si/electric_charge.h>
#include <units/physical/si/frequency.h>
#include <units/physical/si/energy.h>
#include <units/physical/si/frequency.h>
#include <units/physical/si/power.h>
#include <units/physical/si/substance.h>
#include <units/physical/si/velocity.h>
#include <units/physical/si/temperature.h>
#include <units/physical/si/velocity.h>
namespace units::si {
inline constexpr auto planck_constant = 6.62607015e-34q_J * 1q_s;
inline constexpr auto reduced_planck_constant = 6.582119569e-10q_GeV * 1q_s;
inline constexpr auto elementary_charge = 1.602176634e-19q_C;
inline constexpr auto boltzmann_constant = 1.380649e-23q_J / 1q_K;
inline constexpr auto avogadro_constant = 6.02214076e23 / 1q_mol;
inline constexpr auto speed_of_light = 299792458q_m_per_s;
inline constexpr auto hyperfine_structure_transition_frequency = 9192631770q_Hz;
namespace si2019 {
template<Scalar Rep = double>
inline constexpr auto planck_constant = energy<joule, Rep>(6.62607015e-34) * time<second, Rep>(1);
template<Scalar Rep = double>
inline constexpr auto reduced_planck_constant = energy<gigaelectronvolt, Rep>(6.582119569e-10) * time<second, Rep>(1);
template<Scalar Rep = double>
inline constexpr auto elementary_charge = electric_charge<coulomb, Rep>(1.602176634e-19);
template<Scalar Rep = double>
inline constexpr auto boltzmann_constant = energy<joule, Rep>(1.380649e-23) / temperature<kelvin, Rep>(1);
template<Scalar Rep = double>
inline constexpr auto avogadro_constant = Rep(6.02214076e23) / substance<mole, Rep>(1);
template<Scalar Rep = double>
inline constexpr auto speed_of_light = velocity<metre_per_second, Rep>(299792458);
template<Scalar Rep = double>
inline constexpr auto hyperfine_structure_transition_frequency = frequency<hertz, Rep>(9192631770);
// template<Scalar Rep = double>
// inline constexpr auto luminous_efficacy = 683q_lm / 1q_W;
inline constexpr auto standard_gravity = 9.80665q_m_per_s2;
template<Scalar Rep = double>
inline constexpr auto standard_gravity = acceleration<metre_per_second_sq, Rep>(9.80665);
} // namespace si2019
} // namespace units::si