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cxx/mcc_mount_astrom.h

@@ -0,0 +1,65 @@
+#pragma once
+
+/*  MOUNT CONTROL COMPONENTS LIBRARY  */
+
+
+/*  ASTROMETRY ENGINE CONCEPT  */
+
+
+#include <concepts>
+
+#include "mcc_traits.h"
+
+namespace mcc::traits
+{
+
+template <typename T>
+concept mcc_astrom_engine_c = requires(T t) {
+    typename T::engine_err_t;
+    typename T::engine_state_t;
+
+    typename T::meteo_t;
+
+    { t.updateState() };
+
+    /*    coordinates conversional methods    */
+
+    // ICRS RA and DEC to observed place: icrs2obs(ra, dec, time_point, ra_app, dec_app, ha, az, alt, eo)
+    { t.icrs2obs() } -> std::same_as<typename T::engine_err_t>;
+
+    // compute hour angle and declination from azimuth and altitude: hadec2azalt(ha, dec, az, alt)
+    {
+        t.hadec2azalt(std::declval<double>(), std::declval<double>(), std::declval<double&>(), std::declval<double&>())
+    } -> std::same_as<typename T::engine_err_t>;
+
+    // compute azimuth and altitude from hour angle and declination: azalt2hadec(az, alt, ha, dec)
+    {
+        t.azalt2hadec(std::declval<double>(), std::declval<double>(), std::declval<double&>(), std::declval<double&>())
+    } -> std::same_as<typename T::engine_err_t>;
+
+    // compute paralactic angle: hadec2pa(ha, dec, pa)
+    {
+        t.hadec2pa(std::declval<double>(), std::declval<double>(), std::declval<double&>())
+    } -> std::same_as<typename T::engine_err_t>;
+
+
+    /*   time-related methods    */
+
+    // Gregorian Calendar time point to Julian Date: greg2jul(time_point, mjd)
+    // { t.greg2jul() } -> std::same_as<typename T::engine_err_t>;
+    requires mcc_systime_c<mcc_func_arg1_t<decltype(&T::greg2jul)>>;
+    requires std::constructible_from<mcc_func_argN_t<decltype(&T::greg2jul), 2>, double>;
+
+    // apparent sideral time at given longitude (positive to the East): apparentSiderTime(utc, gst)
+    { t.apparentSiderTime(std::declval<const double&>()) } -> std::same_as<typename T::engine_err_t>;
+
+
+    /*   atmospheric refraction-related methods   */
+
+    typename T::refract_result_t;
+    {
+        t.refraction(std::declval<const typename T::meteo_t&>(), std::declval<typename T::refract_result_t&>())
+    } -> std::same_as<typename T::engine_err_t>;
+};
+
+}  // namespace mcc::traits