224 lines
7.2 KiB
C++
224 lines
7.2 KiB
C++
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// navradio.hxx -- class to manage a nav radio instance
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//
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// Written by Curtis Olson, started April 2000.
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//
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// Copyright (C) 2000 - 2002 Curtis L. Olson - http://www.flightgear.org/~curt
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#ifndef _FG_NAVRADIO_HXX
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#define _FG_NAVRADIO_HXX
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#include <Main/fg_props.hxx>
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#include <simgear/compiler.h>
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#include <simgear/structure/subsystem_mgr.hxx>
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#include <simgear/math/interpolater.hxx>
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#include <simgear/timing/timestamp.hxx>
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#include <Navaids/navlist.hxx>
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#include <Sound/morse.hxx>
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class FGNavRadio : public SGSubsystem
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{
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FGMorse morse;
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SGInterpTable *term_tbl;
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SGInterpTable *low_tbl;
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SGInterpTable *high_tbl;
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SGPropertyNode *lon_node;
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SGPropertyNode *lat_node;
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SGPropertyNode *alt_node;
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SGPropertyNode *bus_power;
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SGPropertyNode *nav_serviceable;
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SGPropertyNode *cdi_serviceable, *gs_serviceable, *tofrom_serviceable;
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string last_nav_id;
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bool last_nav_vor;
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int nav_play_count;
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time_t nav_last_time;
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int index; // used for property binding
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char nav_fx_name[256];
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char dme_fx_name[256];
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bool need_update;
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bool power_btn;
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bool audio_btn;
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string nav_id;
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string nav_trans_ident;
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bool nav_valid;
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bool nav_inrange;
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bool nav_has_dme;
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bool nav_has_gs;
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bool nav_loc;
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double nav_freq;
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double nav_alt_freq;
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double nav_heading; // true heading to nav station
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double nav_radial; // current radial we are on (taking
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// into consideration the vor station
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// alignment which likely doesn't
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// match the magnetic alignment
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// exactly.)
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double nav_sel_radial;
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double nav_target_radial;
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double nav_target_radial_true;
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double nav_target_auto_hdg;
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double nav_loclon;
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double nav_loclat;
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double nav_x;
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double nav_y;
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double nav_z;
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double nav_loc_dist;
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double nav_gslon;
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double nav_gslat;
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double nav_elev; // use gs elev if available
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double nav_gs_x;
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double nav_gs_y;
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double nav_gs_z;
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sgdVec3 gs_base_vec;
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double nav_gs_dist;
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double nav_gs_dist_signed;
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double nav_gs_rate_of_climb;
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SGTimeStamp prev_time;
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SGTimeStamp curr_time;
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double nav_range;
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double nav_effective_range;
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double nav_target_gs;
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double nav_twist;
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double nav_vol_btn;
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bool nav_ident_btn;
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double horiz_vel;
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double last_x;
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string name;
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int num;
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// internal periodic station search timer
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double _time_before_search_sec;
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// model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
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double adjustNavRange( double stationElev, double aircraftElev,
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double nominalRange );
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// model standard ILS service volumes as per AIM 1-1-9
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double adjustILSRange( double stationElev, double aircraftElev,
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double offsetDegrees, double distance );
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public:
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FGNavRadio(SGPropertyNode *node);
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~FGNavRadio();
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void init ();
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void bind ();
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void unbind ();
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void update (double dt);
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// Update nav/adf radios based on current postition
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void search ();
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inline void set_bind_index( int i ) {
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index = i;
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sprintf( nav_fx_name, "nav%d-vor-ident", index );
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sprintf( dme_fx_name, "dme%d-vor-ident", index );
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}
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// NavCom Setters
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inline void set_power_btn( bool val ) { power_btn = val; }
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inline void set_audio_btn( bool val ) { audio_btn = val; }
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// NAV Setters
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inline void set_nav_freq( double freq ) {
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nav_freq = freq; need_update = true;
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}
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inline void set_nav_alt_freq( double freq ) { nav_alt_freq = freq; }
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inline void set_nav_sel_radial( double radial ) {
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nav_sel_radial = radial; need_update = true;
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}
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inline void set_nav_vol_btn( double val ) {
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if ( val < 0.0 ) val = 0.0;
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if ( val > 1.0 ) val = 1.0;
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nav_vol_btn = val;
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}
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inline void set_nav_ident_btn( bool val ) { nav_ident_btn = val; }
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// NavCom Accessors
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inline bool has_power() const {
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return power_btn && (bus_power->getDoubleValue() > 1.0);
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}
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inline bool get_power_btn() const { return power_btn; }
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inline bool get_audio_btn() const { return audio_btn; }
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// NAV Accessors
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inline double get_nav_freq () const { return nav_freq; }
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inline double get_nav_alt_freq () const { return nav_alt_freq; }
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inline double get_nav_sel_radial() const { return nav_sel_radial; }
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inline double get_nav_target_radial() const { return nav_target_radial; }
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inline double get_nav_target_radial_true() const {
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return nav_target_radial_true;
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}
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inline double get_nav_target_auto_hdg() const {
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return nav_target_auto_hdg;
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}
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// Calculated values.
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inline bool get_nav_inrange() const { return nav_inrange; }
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bool get_nav_to_flag () const;
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bool get_nav_from_flag () const;
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inline bool get_nav_has_dme() const { return nav_has_dme; }
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inline bool get_nav_dme_inrange () const {
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return nav_inrange && nav_has_dme;
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}
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inline bool get_nav_has_gs() const { return nav_has_gs; }
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inline bool get_nav_loc() const { return nav_loc; }
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inline double get_nav_loclon() const { return nav_loclon; }
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inline double get_nav_loclat() const { return nav_loclat; }
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inline double get_nav_loc_dist() const { return nav_loc_dist; }
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inline double get_nav_gslon() const { return nav_gslon; }
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inline double get_nav_gslat() const { return nav_gslat; }
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inline double get_nav_gs_dist() const { return nav_gs_dist; }
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inline double get_nav_gs_dist_signed() const { return nav_gs_dist_signed; }
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inline double get_nav_gs_rate_of_climb() const {
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return nav_gs_rate_of_climb;
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}
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inline double get_nav_elev() const { return nav_elev; }
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double get_nav_heading() const;
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double get_nav_radial() const;
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double get_nav_reciprocal_radial() const;
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inline double get_nav_target_gs() const { return nav_target_gs; }
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inline double get_nav_twist() const { return nav_twist; }
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double get_nav_cdi_deflection() const;
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double get_nav_cdi_xtrack_error() const;
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double get_nav_gs_deflection() const;
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inline double get_nav_vol_btn() const { return nav_vol_btn; }
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inline bool get_nav_ident_btn() const { return nav_ident_btn; }
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inline const char * get_nav_id() const { return nav_id.c_str(); }
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inline int get_nav_id_c1() const { return nav_id.c_str()[0]; }
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inline int get_nav_id_c2() const { return nav_id.c_str()[1]; }
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inline int get_nav_id_c3() const { return nav_id.c_str()[2]; }
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inline int get_nav_id_c4() const { return nav_id.c_str()[3]; }
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};
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#endif // _FG_NAVRADIO_HXX
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