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Merge pull request #511 from ut-issl/feature/add-moon-rotation
Add moon rotation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| /** | ||
| * @file moon_rotation.cpp | ||
| * @brief Class to calculate the moon rotation | ||
| */ | ||
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| #include "moon_rotation.hpp" | ||
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| #include <SpiceUsr.h> | ||
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| #include <library/math/constants.hpp> | ||
| #include <library/planet_rotation/moon_rotation_utilities.hpp> | ||
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| MoonRotation::MoonRotation(const CelestialInformation& celestial_information, MoonRotationMode mode) | ||
| : mode_(mode), celestial_information_(celestial_information) { | ||
| dcm_j2000_to_mcmf_ = libra::MakeIdentityMatrix<3>(); | ||
| } | ||
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| void MoonRotation::Update(const SimulationTime& simulation_time) { | ||
| if (mode_ == MoonRotationMode::kSimple) { | ||
| libra::Vector<3> moon_position_eci_m = celestial_information_.GetPositionFromSelectedBody_i_m("MOON", "EARTH"); | ||
| libra::Vector<3> moon_velocity_eci_m_s = celestial_information_.GetVelocityFromSelectedBody_i_m_s("MOON", "EARTH"); | ||
| dcm_j2000_to_mcmf_ = CalcDcmEciToPrincipalAxis(moon_position_eci_m, moon_velocity_eci_m_s); | ||
| } else if (mode_ == MoonRotationMode::kIauMoon) { | ||
| ConstSpiceChar from[] = "J2000"; | ||
| ConstSpiceChar to[] = "IAU_MOON"; | ||
| SpiceDouble et = simulation_time.GetCurrentEphemerisTime(); | ||
| SpiceDouble state_transition_matrix[6][6]; | ||
| sxform_c(from, to, et, state_transition_matrix); | ||
| for (size_t i = 0; i < 3; i++) { | ||
| for (size_t j = 0; j < 3; j++) { | ||
| dcm_j2000_to_mcmf_[i][j] = state_transition_matrix[i][j]; | ||
| } | ||
| } | ||
| } else { | ||
| dcm_j2000_to_mcmf_ = libra::MakeIdentityMatrix<3>(); | ||
| } | ||
| } | ||
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| MoonRotationMode ConvertMoonRotationMode(const std::string mode) { | ||
| MoonRotationMode rotation_mode; | ||
| if (mode == "IDLE") { | ||
| rotation_mode = MoonRotationMode::kIdle; | ||
| } else if (mode == "SIMPLE") { | ||
| rotation_mode = MoonRotationMode::kSimple; | ||
| } else if (mode == "IAU_MOON") { | ||
| rotation_mode = MoonRotationMode::kIauMoon; | ||
| } else // if rotation_mode is neither Idle, Simple, nor Full, set rotation_mode to Idle | ||
| { | ||
| rotation_mode = MoonRotationMode::kIdle; | ||
| } | ||
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| return rotation_mode; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| /** | ||
| * @file moon_rotation.hpp | ||
| * @brief Class to calculate the moon rotation | ||
| */ | ||
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| #ifndef S2E_ENVIRONMENT_GLOBAL_MOON_ROTATION_HPP_ | ||
| #define S2E_ENVIRONMENT_GLOBAL_MOON_ROTATION_HPP_ | ||
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| #include "celestial_information.hpp" | ||
| #include "library/math/matrix.hpp" | ||
| #include "library/math/vector.hpp" | ||
| #include "simulation_time.hpp" | ||
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| class CelestialInformation; | ||
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| /** | ||
| * @enum MoonRotationMode | ||
| * @brief Definition of calculation mode of moon rotation | ||
| */ | ||
| enum class MoonRotationMode { | ||
| kIdle, //!< No rotation | ||
| kSimple, //!< Mean Earth and Principal Axis calculation | ||
| kIauMoon, //!< IAU_MOON frame given by SPICE | ||
| }; | ||
| /** | ||
| * @fn ConvertMoonRotationMode | ||
| * @brief Convert string to MoonRotationMode | ||
| * @param[in] mode: mode name in string | ||
| */ | ||
| MoonRotationMode ConvertMoonRotationMode(const std::string mode); | ||
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| /** | ||
| * @class MoonRotation | ||
| * @brief Class to calculate the moon rotation | ||
| */ | ||
| class MoonRotation { | ||
| public: | ||
| /** | ||
| * @fn MoonRotation | ||
| * @brief Constructor | ||
| */ | ||
| MoonRotation(const CelestialInformation &celestial_information, MoonRotationMode mode = MoonRotationMode::kIdle); | ||
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| /** | ||
| * @fn Update | ||
| * @brief Update rotation | ||
| * @param [in] simulation_time: simulation_time | ||
| */ | ||
| void Update(const SimulationTime &simulation_time); | ||
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| /** | ||
| * @fn GetDcmJ2000ToMcmf | ||
| * @brief Return the DCM between J2000 inertial frame and the Moon Centered Moon Fixed frame | ||
| * @note Because this is just a DCM, users need to consider the origin of the vector, which you want to convert with this matrix. | ||
| */ | ||
| inline const libra::Matrix<3, 3> GetDcmJ2000ToMcmf() const { return dcm_j2000_to_mcmf_; }; | ||
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| private: | ||
| MoonRotationMode mode_; //!< Rotation mode | ||
| libra::Matrix<3, 3> dcm_j2000_to_mcmf_; //!< Direction Cosine Matrix J2000 to MCMF (Moon Centered Moon Fixed) | ||
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| const CelestialInformation &celestial_information_; //!< Celestial Information to get moon orbit | ||
| }; | ||
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| #endif // S2E_ENVIRONMENT_GLOBAL_MOON_ROTATION_HPP_ |
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