...

cxx/CMakeLists.txt

@@ -134,7 +134,10 @@ target_include_directories(${MCC_LIBRARY} INTERFACE ${FITPACK_INCLUDE_DIR})
 
 set(ASIBFM700_LIB_SRC asibfm700_hardware.h asibfm700_hardware.cpp)
 set(ASIBFM700_LIB asibfm700)
-add_library(${ASIBFM700_LIB} STATIC ${ASIBFM700_LIB_SRC})
+add_library(${ASIBFM700_LIB} STATIC ${ASIBFM700_LIB_SRC}
+    asibfm700_slew_model.h asibfm700_slew_model.cpp
+    asibfm700_common.h)
+target_include_directories(${ASIBFM700_LIB} PRIVATE ${FITPACK_INCLUDE_DIR})
 
 # set(MOUNT_SERVER_APP_SRC mount.h mount_state.h mount_server.cpp comm_server.h comm_server_endpoint.h comm_server_configfile.h mount_astrom.h
 #     mount_astrom_default.h mcc_coord.h mount_pz.h mcc_fsm.h mcc_fsm_utils.h mcc_finite_state_machine.h mcc_mount_events_states.h)

cxx/asibfm700_common.h

@@ -0,0 +1,45 @@
+#pragma once
+
+/*                          AstroSIB-FM700 FORK MOUNT CONTROL LIBRARY                           */
+
+/*                          COMMON DEFINITIONS                         */
+
+
+#include "mcc_mount_astro_erfa.h"
+#include "mcc_mount_pec.h"
+#include "mcc_mount_telemetry.h"
+
+#include "asibfm700_hardware.h"
+
+namespace asibfm700
+{
+
+typedef mcc::astrom::erfa::MccMountAstromEngineERFA<mcc::MccAngle> AsibFM700AstromEngine;
+
+typedef mcc::MccMountDefaultPEC<mcc::MccMountType::FORK_TYPE> AsibFM700PointingErrorCorrection;
+
+struct AsibFM700TelemetryData : mcc::MccMountTelemetryData<AsibFM700AstromEngine, AsibFM700PointingErrorCorrection> {
+    // apparent target (user-input) current coordinates
+    coord_t tagRA, tagDEC;
+    coord_t tagHA;
+    coord_t tagAZ, tagALT;
+    coord_t tagPA;
+};
+
+typedef mcc::MccMountTelemetry<AsibFM700AstromEngine,
+                               AsibFM700PointingErrorCorrection,
+                               AsibFM700Hardware,
+                               AsibFM700TelemetryData>
+    AsibFM700Telemetry;
+
+
+// global mount configuration
+
+struct AsibFM700Config {
+    std::chrono::milliseconds hardwareAskingPeriod{100};  // main cycle period
+
+    // mount hardware config
+    AsibFM700Hardware::hardware_config_t hardwareConfig;
+};
+
+}  // namespace asibfm700

cxx/asibfm700_hardware.cpp

@@ -93,7 +93,8 @@ std::string_view AsibFM700Hardware::id() const
 
 AsibFM700Hardware::error_t AsibFM700Hardware::setPos(AsibFM700Hardware::axes_pos_t pos)
 {
-    double X = pos.x, Y = pos.y;
+    // according to hardware configuration (encoders pins (Eddy said)) X is DEC-axis and Y is HA-axis
+    double X = pos.y, Y = pos.x;
     auto err = static_cast<AsibFM700HardwareErrorCode>(Mount.moveTo(&X, &Y));
 
     return err;
@@ -115,8 +116,9 @@ AsibFM700Hardware::error_t AsibFM700Hardware::getPos(AsibFM700Hardware::axes_pos
 
         pos.time_point = time_point_t{std::chrono::duration_cast<time_point_t::duration>(secs)};
 
-        pos.x = data.encposition.X;
-        pos.y = data.encposition.Y;
+        // according to hardware configuration (encoders pins (Eddy said)) X is DEC-axis and Y is HA-axis
+        pos.x = data.encposition.Y;
+        pos.y = data.encposition.X;
     }
 
     return err;

cxx/asibfm700_hardware.h

@@ -71,20 +71,6 @@ public:
         coord_t x, y;
     };
 
-    // c++ish wrapper to 'conf_t' struct
-
-    struct device_config_t {
-        std::string MountDevPath;    // path to mount device
-        int MountDevSpeed;           // serial speed
-        std::string EncoderDevPath;  // path to encoder device
-        int EncoderDevSpeed;         // serial speed
-        int SepEncoder;  // ==1 if encoder works as separate serial device, ==2 if there's new version with two devices
-        std::string EncoderXDevPath;  // paths to new controller devices
-        std::string EncoderYDevPath;
-        double MountReqInterval;    // interval between subsequent mount requests (seconds)
-        double EncoderReqInterval;  // interval between subsequent encoder requests (seconds)
-    };
-
 
     struct hardware_config_t {
         // the 'char*' fields from conf_t:
@@ -113,6 +99,7 @@ public:
 
     error_t setPos(axes_pos_t);
     error_t getPos(axes_pos_t&);
+
     error_t stop();
     error_t init();
 

cxx/asibfm700_slew_model.cpp

@@ -0,0 +1,110 @@
+#include "asibfm700_slew_model.h"
+
+
+namespace asibfm700
+{
+
+/*                          error category implementation  */
+
+const char* AsibFM700SlewModelErrorCategory::name() const noexcept
+{
+    return "ASTROSIB FM700 MOUNT SLEW MODEL ERROR CATEGORY";
+}
+
+std::string AsibFM700SlewModelErrorCategory::message(int ec) const
+{
+    AsibFM700SlewModelErrorCode code = static_cast<AsibFM700SlewModelErrorCode>(ec);
+
+    std::string msg;
+
+    switch (code) {
+        case AsibFM700SlewModelErrorCode::ERROR_OK:
+            msg = "OK";
+        default:
+            msg = "UNKNOWN ERROR";
+    }
+
+    return msg;
+}
+
+const AsibFM700SlewModelErrorCategory& AsibFM700SlewModelErrorCategory::get()
+{
+    static const AsibFM700SlewModelErrorCategory constInst;
+    return constInst;
+}
+
+
+AsibFM700SlewModel::AsibFM700SlewModel(AsibFM700Hardware& hw_control, AsibFM700AstromEngine& astrom_engine)
+    : _hwControl(hw_control), _astromEngine(astrom_engine)
+{
+}
+
+
+AsibFM700SlewModel::error_t AsibFM700SlewModel::slew(const slew_params_t& slew_pars, AsibFM700Telemetry& telemetry)
+{
+    using astrom_t = std::remove_reference_t<decltype(_astromEngine)>;
+    using coord_t = typename astrom_t::coord_t;
+    using jd_t = typename astrom_t::juldate_t;
+
+    AsibFM700SlewModel::error_t res_err = AsibFM700SlewModelErrorCode::ERROR_OK;
+
+    AsibFM700Hardware::axes_pos_t ax_pos;
+
+    if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_XY) {
+        // trivial case (the pair is interpretated as raw encoder coordinates)
+        ax_pos.x = slew_pars.x;
+        ax_pos.y = slew_pars.y;
+    } else if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_RADEC_ICRS) {  // catalog coordinates
+        jd_t jd;
+        coord_t ra_app, dec_app, ha, az, alt;
+        typename astrom_t::eo_t eo;
+
+        auto err = _astromEngine.greg2jul(std::chrono::system_clock::now(), jd);
+
+        if (!err) {
+            err = _astromEngine.icrs2obs(slew_pars.x, slew_pars.y, jd, ra_app, dec_app, ha, az, alt, eo);
+
+            if (!err) {
+                res_err = slew({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP,
+                                .x = ha,
+                                .y = dec_app,
+                                .stop = slew_pars.stop},
+                               telemetry);
+            }
+        }
+
+    } else if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_RADEC_APP) {  // apparent
+        jd_t jd;
+        typename astrom_t::eo_t eo;
+
+        auto err = _astromEngine.greg2jul(std::chrono::system_clock::now(), jd);
+        if (!err) {
+            typename astrom_t::sideral_time_t lst;
+            err = _astromEngine.apparentSiderTime(jd, lst, true);
+
+            if (!err) {
+                err = _astromEngine.eqOrigins(jd, eo);
+                if (!err) {
+                    res_err = slew({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP,
+                                    .x = lst - slew_pars.x + eo,  // HA = LST - RA_APP + EO
+                                    .y = slew_pars.y,
+                                    .stop = slew_pars.stop},
+                                   telemetry);
+                }
+            }
+        }
+    } else if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP) {  // apparent
+        // compute encoders coordinates
+    } else if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_AZALT) {
+    } else if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_AZZD) {
+    }
+
+    auto err = _hwControl.setPos(std::move(ax_pos));
+
+    while (true) {
+    }
+
+    return res_err;
+}
+
+}  // namespace asibfm700

cxx/asibfm700_slew_model.h

@@ -0,0 +1,75 @@
+#pragma once
+
+/*                          AstroSIB-FM700 FORK MOUNT CONTROL LIBRARY                           */
+
+/*                          SLEW MODEL IMPLEMENTATION                         */
+
+
+#include "asibfm700_common.h"
+
+namespace asibfm700
+{
+
+enum class AsibFM700SlewModelErrorCode : int { ERROR_OK };
+
+// error category
+struct AsibFM700SlewModelErrorCategory : public std::error_category {
+    const char* name() const noexcept;
+    std::string message(int ec) const;
+
+    static const AsibFM700SlewModelErrorCategory& get();
+};
+
+
+inline std::error_code make_error_code(AsibFM700SlewModelErrorCode ec)
+{
+    return std::error_code(static_cast<int>(ec), AsibFM700SlewModelErrorCategory::get());
+}
+
+}  // namespace asibfm700
+
+
+
+namespace std
+{
+
+template <>
+class is_error_code_enum<asibfm700::AsibFM700SlewModelErrorCode> : public true_type
+{
+};
+
+}  // namespace std
+
+
+
+namespace asibfm700
+{
+
+class AsibFM700SlewModel final
+{
+public:
+    typedef std::error_code error_t;
+
+    struct slew_params_t {
+        typedef mcc::MccAngle coord_t;
+
+        mcc::MccCoordPairKind coordPairKind{mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP};
+
+        coord_t x{0.0};
+        coord_t y{0.0};
+
+        bool stop{false};
+    };
+
+    AsibFM700SlewModel(AsibFM700Hardware& hw_control, AsibFM700AstromEngine& astrom_engine);
+
+    ~AsibFM700SlewModel();
+
+    error_t slew(const slew_params_t&, AsibFM700Telemetry&);
+
+private:
+    AsibFM700Hardware& _hwControl;
+    AsibFM700AstromEngine& _astromEngine;
+};
+
+}  // namespace asibfm700

cxx/mcc_mount_concepts.h

@@ -186,6 +186,7 @@ concept mcc_mount_hardware_c = !std::copyable<T> && std::movable<T> && requires(
 
     { t.setPos(std::declval<typename T::axes_pos_t>()) } -> std::same_as<typename T::error_t>;
     { t.getPos(std::declval<typename T::axes_pos_t&>()) } -> std::same_as<typename T::error_t>;
+
     { t.stop() } -> std::same_as<typename T::error_t>;
     { t.init() } -> std::same_as<typename T::error_t>;
 };
@@ -215,7 +216,7 @@ concept mcc_mount_pec_c = requires(T t, const T t_const) {
 
     {
         t.compute(std::declval<const typename T::coord_t&>(), std::declval<const typename T::coord_t&>(),
-                  std::declval<typename T::pec_result_t>())
+                  std::declval<typename T::pec_result_t&>())
     } -> std::same_as<typename T::error_t>;
 };
 
@@ -226,6 +227,7 @@ concept mcc_mount_pec_c = requires(T t, const T t_const) {
 template <typename T>
 concept mcc_mount_telemetry_data_c = requires(T telemetry) {
     typename T::coord_t;
+    typename T::time_point_t;
 
     // // target current coordinates
     // requires std::same_as<decltype(telemetry.tagRA), typename T::coord_t>;   // apparent RA
@@ -297,7 +299,7 @@ concept mcc_slew_params_c = std::movable<T> && requires(T t) {
 
 template <typename T, typename TelemetryT>
 concept mcc_slew_model_c = mcc_mount_telemetry_c<TelemetryT> && requires(T t) {
-    typename T::error_t;
+    requires mcc_error_c<typename T::error_t>;
     requires mcc_slew_params_c<typename T::slew_params_t>;
 
     {

cxx/mcc_mount_coord.h

@@ -397,7 +397,9 @@ static auto operator*(const T1& v1, const T2& v2)
     } else if constexpr (std::is_arithmetic_v<T2>) {
         return v1 *= v2;
     } else {
-        static_assert(false, "INCOMPATIBLE TYPES!");
+        using res_t = std::conditional_t<std::convertible_to<T1, T2> && std::derived_from<T1, MccAngle>, T1, T2>;
+        return res_t{(double)v1 * (double)v2};
+        // static_assert(false, "INCOMPATIBLE TYPES!");
     }
 }
 

cxx/mcc_mount_pec.h

@@ -28,6 +28,7 @@ class MccMountDefaultPEC final
 public:
     static constexpr MccMountType mountType = MOUNT_TYPE;
 
+    typedef std::error_code error_t;
     typedef MccAngle coord_t;
 
     struct pec_result_t {
@@ -117,11 +118,12 @@ public:
         return _pecData.type;
     }
 
-    // X and Y axis encoder coordinates
-    pec_result_t compute(const coord_t& x, const coord_t& y)
+    // The computed PEC quantities must be interpretated as:
+    //     apparent_X = encoder_X + pec_result_t.dx
+    //     apparent_Y = encoder_Y + pec_result_t.dy
+    // so, input x and y are assumed to be mount axis encoder coordinates
+    error_t compute(const coord_t& x, const coord_t& y, pec_result_t& res)
     {
-        pec_result_t res{0.0, 0.0};
-
         std::lock_guard lock(_pecDataMutex);
 
         if constexpr (mcc_is_equatorial_mount<MOUNT_TYPE>) {  // equatorial
@@ -163,7 +165,7 @@ public:
                 if (ret) {
                     res.dx = std::numeric_limits<double>::quiet_NaN();
                     res.dy = std::numeric_limits<double>::quiet_NaN();
-                    return res;
+                    return std::error_code();  // !!!!!!!!!!!!!!
                 }
 
 
@@ -173,7 +175,7 @@ public:
                 if (ret) {
                     res.dx = std::numeric_limits<double>::quiet_NaN();
                     res.dy = std::numeric_limits<double>::quiet_NaN();
-                    return res;
+                    return std::error_code();  // !!!!!!!!!!!!!!
                 }
 
 
@@ -185,9 +187,48 @@ public:
             static_assert(false, "UNSUPPORTED");
         }
 
-        return res;
+        return std::error_code();
     }
 
+    // from celestial to encoder (use of iterative scheme)
+    error_t reverseCompute(const coord_t& x, const coord_t& y, pec_result_t& res, coord_t eps, size_t max_iter = 5)
+    {
+        coord_t e2 = eps * eps;
+
+        coord_t xi = x, yi = y;
+        coord_t xp, yp;
+        size_t iter = 1;
+
+        // the first iteration
+        auto err = compute(x, y, res);
+
+        if (!err) {
+            xp = x - res.dx;
+            yp = y - res.dy;
+
+            bool ok = ((xp - x) * (xp - x) + (yp - y) * (yp - y)) <= e2;
+            if (ok) {
+                return std::error_code();
+            }
+
+            while (iter < max_iter) {
+                xi = xp;
+                yi = xp;
+                err = compute(xi, yi, res);
+                xp -= res.dx;
+                yp -= res.dy;
+
+                ok = ((xp - xi) * (xp - xi) + (yp - yi) * (yp - yi)) <= e2;
+                if (ok) {
+                    return std::error_code();
+                }
+            }
+
+            // err = "exceed max iterations";!!!
+        }
+
+        return err;
+    }
 
 
 private:
@@ -203,4 +244,7 @@ private:
 typedef MccMountDefaultPEC<MccMountType::ALTAZ_TYPE> MccMountDefaultAltAzPec;
 typedef MccMountDefaultPEC<MccMountType::FORK_TYPE> MccMountDefaultForkPec;
 
+static_assert(traits::mcc_mount_pec_c<MccMountDefaultForkPec>, "");
+
+
 }  // namespace mcc

cxx/mcc_mount_telemetry.h

@@ -13,9 +13,95 @@ namespace mcc
 {
 
 
+namespace traits
+{
+
+/*                     enhanced telemetry data concept                                  */
+/*  in general it correspond to definitions used in astrometry engine (see its concept) */
+
+template <typename T, typename ASTROM_ENGINE_T, typename PEC_T>
+concept mcc_mount_telemetry_enh_data_c = mcc_mount_telemetry_data_c<T> && requires(T t) {
+    requires traits::mcc_astrom_engine_c<ASTROM_ENGINE_T>;
+    requires traits::mcc_mount_pec_c<PEC_T>;
+
+    // check for types definitions and its consistency
+    requires std::same_as<typename T::coord_t, typename ASTROM_ENGINE_T::coord_t>;
+
+    requires std::same_as<typename T::time_point_t, typename ASTROM_ENGINE_T::time_point_t>;
+
+    requires std::same_as<typename T::juldate_t,
+                          typename ASTROM_ENGINE_T::juldate_t>;  // a type to represent Julian date
+
+    requires std::same_as<typename T::sideral_time_t,
+                          typename ASTROM_ENGINE_T::sideral_time_t>;  // a type to represent sideral time
+
+    requires std::same_as<typename T::pa_t,
+                          typename ASTROM_ENGINE_T::pa_t>;  // a type to represent parallactic angle
+    // typename T::eo_t;            // a type to represent equation of origins
+
+    requires std::same_as<decltype(t.jd), typename T::juldate_t>;              // Julian date
+    requires std::same_as<decltype(t.siderTime), typename T::sideral_time_t>;  // sideral time
+    requires std::same_as<decltype(t.mntRA), typename T::pa_t>;                // parallactic angle
+
+    // encoder-measured (non-corrected for PCS) current mount position and moving speed (in radians, radians/s)
+    // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ALT for horizontal-type one
+    requires std::same_as<decltype(t.mntPosX), typename T::coord_t>;
+    requires std::same_as<decltype(t.mntPosY), typename T::coord_t>;
+
+    // current refraction coefficients
+    requires std::same_as<decltype(t.currRefrCoeffs), typename PEC_T::pec_result_t>;
+    // current refraction correction (for mntALT)
+    requires std::same_as<decltype(t.currRefr), typename T::coord_t>;
+
+    // PEC (pointing error correction):
+    // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ALT for horizontal-type one
+    requires std::same_as<decltype(t.pecX), typename T::coord_t>;
+    requires std::same_as<decltype(t.pecY), typename T::coord_t>;
+};
+
+}  // namespace traits
+
+
+// default generic telemetry data definition
+template <traits::mcc_astrom_engine_c ASTROM_ENGINE_T, traits::mcc_mount_pec_c PEC_T>
+struct MccMountTelemetryData {
+    typedef typename ASTROM_ENGINE_T::coord_t coord_t;
+    typedef typename ASTROM_ENGINE_T::time_point_t time_point_t;
+    typedef typename ASTROM_ENGINE_T::juldate_t juldate_t;
+    typedef typename ASTROM_ENGINE_T::sideral_time_t sideral_time_t;
+    typedef typename ASTROM_ENGINE_T::pa_t pa_t;
+
+    // time-related
+    time_point_t utc;          // time point of measurements, UTC
+    juldate_t jd;              // Julian date
+    sideral_time_t siderTime;  // local apperant sideral time
+
+    // encoder-measured current mount coordinates
+    coord_t mntRA, mntDEC;
+    coord_t mntHA;
+    coord_t mntAZ, mntALT;
+    pa_t mntPA;
+
+    // encoder-measured (non-corrected for PCS) current mount position
+    // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ALT for horizontal-type one
+    coord_t mntPosX, mntPosY;
+
+    // current refraction coefficients
+    typename PEC_T::pec_result_t currRefrCoeffs;
+
+    // current refraction correction (for mntALT)
+    coord_t currRefr;
+
+    // PEC (pointing error correction):
+    // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ALT for horizontal-type one
+    coord_t pecX, pecY;
+};
+
 template <traits::mcc_astrom_engine_c ASTROM_ENGINE_T,
           traits::mcc_mount_pec_c PEC_T,
-          traits::mcc_mount_hardware_c HARDWARE_T>
+          traits::mcc_mount_hardware_c HARDWARE_T,
+          traits::mcc_mount_telemetry_enh_data_c<ASTROM_ENGINE_T, PEC_T> DATA_T =
+              MccMountTelemetryData<ASTROM_ENGINE_T, PEC_T>>
 class MccMountTelemetry
 {
 public:
@@ -51,42 +137,44 @@ public:
     static_assert(std::convertible_to<typename hardware_t::time_point_t, typename astrom_engine_t::time_point_t>,
                   "HARDWARE TIME-POINT TYPE MUST BE CONVERTIBLE TO ASTROMETRY ENGINE ONE!");
 
+    typedef DATA_T mount_telemetry_data_t;
+
     // mount current telemetry data: time, position and related quantities
-    struct mount_telemetry_data_t {
-        typedef typename astrom_engine_t::coord_t coord_t;
+    // struct mount_telemetry_data_t {
+    //     typedef typename astrom_engine_t::coord_t coord_t;
 
-        // time-related
-        typename astrom_engine_t::time_point_t utc;          // time point of measurements, UTC
-        typename astrom_engine_t::juldate_t jd;              // Julian date
-        typename astrom_engine_t::sideral_time_t siderTime;  // local apperant sideral time
-        // typename astrom_engine_t::time_point_t ut1;          // Universal time
-        // typename astrom_engine_t::time_point_t tt;           // Terrestial time
+    //     // time-related
+    //     typename astrom_engine_t::time_point_t utc;          // time point of measurements, UTC
+    //     typename astrom_engine_t::juldate_t jd;              // Julian date
+    //     typename astrom_engine_t::sideral_time_t siderTime;  // local apperant sideral time
+    //     // typename astrom_engine_t::time_point_t ut1;          // Universal time
+    //     // typename astrom_engine_t::time_point_t tt;           // Terrestial time
 
-        // apparent target (user-input) current coordinates (in radians)
-        coord_t tagRA, tagDEC;
-        coord_t tagHA;
-        coord_t tagAZ, tagALT;
-        coord_t tagPA;  // paralactic angle
+    //     // apparent target (user-input) current coordinates (in radians)
+    //     coord_t tagRA, tagDEC;
+    //     coord_t tagHA;
+    //     coord_t tagAZ, tagALT;
+    //     coord_t tagPA;  // paralactic angle
 
-        // encoder-measured current mount coordinates (in radians)
-        coord_t mntRA, mntDEC;
-        coord_t mntHA;
-        coord_t mntAZ, mntALT;
-        typename astrom_engine_t::pa_t mntPA;
+    //     // encoder-measured current mount coordinates (in radians)
+    //     coord_t mntRA, mntDEC;
+    //     coord_t mntHA;
+    //     coord_t mntAZ, mntALT;
+    //     typename astrom_engine_t::pa_t mntPA;
 
-        // encoder-measured (non-corrected for PCS) current mount position and moving speed (in radians, radians/s)
-        // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ALT for horizontal-type one
-        coord_t mntPosX, mntPosY;
+    //     // encoder-measured (non-corrected for PCS) current mount position and moving speed (in radians, radians/s)
+    //     // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ALT for horizontal-type one
+    //     coord_t mntPosX, mntPosY;
 
-        // current refraction coefficients
-        typename pec_t::pec_result_t currRefrCoeffs;
-        // current refraction correction (for mntALT)
-        coord_t currRefr;
+    //     // current refraction coefficients
+    //     typename pec_t::pec_result_t currRefrCoeffs;
+    //     // current refraction correction (for mntALT)
+    //     coord_t currRefr;
 
-        // PEC (pointing error correction):
-        // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ALT for horizontal-type one
-        coord_t pecX, pecY;
-    };
+    //     // PEC (pointing error correction):
+    //     // X - HA, Y - DEC for equatorial-type mount; X - AZ, Y - ALT for horizontal-type one
+    //     coord_t pecX, pecY;
+    // };
 
     MccMountTelemetry(astrom_engine_t& astrom_engine, pec_t& pec, hardware_t& hardware)
         : _astromEngine(astrom_engine), _pec(pec), _hardware(hardware)

cxx/mcc_slew_model.h

@@ -0,0 +1,212 @@
+#pragma once
+
+
+/*                          MOUNT CONTROL COMPONENTS LIBRARY                            */
+
+
+/*                          A VERY SIMPLE SLEW MODEL GENERIC IMPLEMENTATION             */
+
+
+#include "mcc_mount_concepts.h"
+
+namespace mcc
+{
+
+
+/*
+ *   WARNING: it is assumed that coordinates are in radians!
+ *            but this fact is only used if slew coordinate pair are given as
+ *            [azimuth, zenithal distance] (see sources code below)
+ */
+
+template <traits::mcc_mount_telemetry_c TELEMETRY_T>
+class MccSimpleSlewModel
+{
+public:
+    typedef std::error_code error_t;
+
+    struct slew_params_t {
+        typedef mcc::MccAngle coord_t;
+
+        mcc::MccCoordPairKind coordPairKind{mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP};
+
+        coord_t x{0.0};
+        coord_t y{0.0};
+
+        bool stop{false};
+    };
+
+
+    template <traits::mcc_mount_hardware_c HARDWARE_T,
+              traits::mcc_astrom_engine_c ASTROM_T,
+              traits::mcc_mount_pec_c PEC_T>
+    MccSimpleSlewModel(HARDWARE_T& hardware, ASTROM_T& astrom_engine, PEC_T& pec)
+    {
+        const auto p_hardware = &hardware;
+        const auto p_astrom_engine = &astrom_engine;
+        const auto p_pec = &pec;
+
+
+
+        _slewFunc = [p_hardware, p_astrom_engine, p_pec](this auto&& self, const slew_params_t& slew_pars,
+                                                         TELEMETRY_T& telemetry) {
+            using coord_t = typename ASTROM_T::coord_t;
+            using jd_t = typename ASTROM_T::juldate_t;
+
+            typename HARDWARE_T::axes_pos_t ax_pos;
+
+            error_t res_err;
+            typename ASTROM_T::error_t ast_err;
+
+            if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_XY) {
+                // trivial case (the pair is interpretated as raw encoder coordinates)
+                ax_pos.x = slew_pars.x;
+                ax_pos.y = slew_pars.y;
+            } else if (slew_pars.coordPairKind ==
+                       mcc::MccCoordPairKind::COORDS_KIND_RADEC_ICRS) {  // catalog coordinates
+                jd_t jd;
+                coord_t ra_app, dec_app, ha, az, alt;
+                typename ASTROM_T::eo_t eo;
+
+                ast_err = p_astrom_engine->greg2jul(std::chrono::system_clock::now(), jd);
+
+                if (!ast_err) {
+                    ast_err = p_astrom_engine->icrs2obs(slew_pars.x, slew_pars.y, jd, ra_app, dec_app, ha, az, alt, eo);
+
+                    if (!ast_err) {
+                        if constexpr (mccIsEquatorialMount(PEC_T::mountType)) {
+                            res_err = self({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP,
+                                            .x = ha,
+                                            .y = dec_app,
+                                            .stop = slew_pars.stop},
+                                           telemetry);
+                        } else if constexpr (mccIsAltAzMount(PEC_T::mountType)) {
+                            res_err = self({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_AZALT,
+                                            .x = az,
+                                            .y = alt,
+                                            .stop = slew_pars.stop},
+                                           telemetry);
+                        } else {
+                            static_assert(false, "UNKNOWN MOUNT TYPE!");
+                        }
+                    }
+                }
+
+            } else if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_RADEC_APP) {  // apparent
+                jd_t jd;
+                typename ASTROM_T::eo_t eo;
+
+                ast_err = p_astrom_engine->greg2jul(std::chrono::system_clock::now(), jd);
+                if (!ast_err) {
+                    typename ASTROM_T::sideral_time_t lst;
+                    ast_err = p_astrom_engine->apparentSiderTime(jd, lst, true);
+
+                    if (!ast_err) {
+                        ast_err = p_astrom_engine->eqOrigins(jd, eo);
+                        if (!ast_err) {
+                            res_err = self({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP,
+                                            .x = lst - slew_pars.x + eo,  // HA = LST - RA_APP + EO
+                                            .y = slew_pars.y,
+                                            .stop = slew_pars.stop},
+                                           telemetry);
+                        }
+                    }
+                }
+            } else if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP) {  // apparent
+                if constexpr (mccIsEquatorialMount(PEC_T::mountType)) {  // compute encoder coordinates
+                    coord_t eps = 1.0 / 3600.0 * std::numbers::pi / 180.0;
+
+                    typename PEC_T::pec_result_t pec_res;
+
+                    auto err = p_pec->reverseCompute(slew_pars.x, slew_pars.y, pec_res, eps, 10);
+                    if (!err) {
+                        res_err = self({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_XY,
+                                        .x = slew_pars.x - pec_res.dx,
+                                        .y = slew_pars.y - pec_res.dy,
+                                        .stop = slew_pars.stop},
+                                       telemetry);
+                    }
+                } else if constexpr (mccIsAltAzMount(PEC_T::mountType)) {
+                    coord_t az, alt;
+
+                    ast_err = p_astrom_engine->hadec2azalt(slew_pars.x, slew_pars.y, az, alt);
+
+                    if (!ast_err) {
+                        res_err = self({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_AZALT,
+                                        .x = az,
+                                        .y = alt,
+                                        .stop = slew_pars.stop},
+                                       telemetry);
+                    }
+                } else {
+                    static_assert(false, "UNKNOWN MOUNT TYPE!");
+                }
+            } else if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_AZALT) {
+                if constexpr (mccIsEquatorialMount(PEC_T::mountType)) {
+                    coord_t ha, dec;
+
+                    ast_err = p_astrom_engine->azalt2hadec(slew_pars.x, slew_pars.y, ha, dec);
+
+                    if (!ast_err) {
+                        res_err = self({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_HADEC_APP,
+                                        .x = ha,
+                                        .y = dec,
+                                        .stop = slew_pars.stop},
+                                       telemetry);
+                    }
+                } else if constexpr (mccIsAltAzMount(PEC_T::mountType)) {  // compute encoder coordinates
+                    coord_t eps = 1.0 / 3600.0 * std::numbers::pi / 180.0;
+
+                    typename PEC_T::pec_result_t pec_res;
+
+                    auto err = p_pec->reverseCompute(slew_pars.x, slew_pars.y, pec_res, eps, 10);
+                    if (!err) {
+                        res_err = self({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_XY,
+                                        .x = slew_pars.x - pec_res.dx,
+                                        .y = slew_pars.y - pec_res.dy,
+                                        .stop = slew_pars.stop},
+                                       telemetry);
+                    }
+
+                } else {
+                    static_assert(false, "UNKNOWN MOUNT TYPE!");
+                }
+            } else if (slew_pars.coordPairKind == mcc::MccCoordPairKind::COORDS_KIND_AZZD) {
+                //
+                // WARNING: it is assumed that coordinates are in radians!
+                //
+                res_err = self({.coordPairKind = mcc::MccCoordPairKind::COORDS_KIND_AZALT,
+                                .x = slew_pars.x,
+                                .y = std::numbers::pi / 2.0 - slew_pars.y,
+                                .stop = slew_pars.stop},
+                               telemetry);
+            }
+
+            if (res_err) {
+                return res_err;
+            }
+
+            if (!ast_err) {
+                auto err = p_hardware->setPos(std::move(ax_pos));
+
+                while (true) {
+                }
+            }
+        };
+    }
+
+    error_t slew(const slew_params_t& pars, TELEMETRY_T& telemetry)
+    {
+        error_t res_err = _slewFunc(pars, telemetry);
+
+        return res_err;
+    }
+
+protected:
+    std::function<error_t(const slew_params_t&, TELEMETRY_T&)> _slewFunc{};
+};
+
+
+// static_assert(traits::mcc_slew_model_c<>);
+
+}  // namespace mcc