c7c9fd67aa
- Calculate line of sight distance instead of distance over ground - Do a nav cache update if carrier_nav.dat.gz timestamp has changed - Allow comments in carrier_nav.dat.gz - "Fix" range calculations (still does not take terrain/weather and other influences into account)
151 lines
4.6 KiB
C++
151 lines
4.6 KiB
C++
// navrecord.hxx -- generic vor/dme/ndb class
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//
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// Written by Curtis Olson, started May 2004.
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//
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// Copyright (C) 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// $Id$
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#ifndef _FG_NAVRECORD_HXX
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#define _FG_NAVRECORD_HXX
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#include <iosfwd>
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#include "navaids_fwd.hxx"
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#include "positioned.hxx"
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#include <Airports/airports_fwd.hxx>
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#include <simgear/props/propsfwd.hxx>
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#include <simgear/timing/timestamp.hxx>
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const double FG_NAV_DEFAULT_RANGE = 50; // nm
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const double FG_LOC_DEFAULT_RANGE = 18; // nm
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const double FG_DME_DEFAULT_RANGE = 50; // nm
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const double FG_TACAN_DEFAULT_RANGE = 250; // nm
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const double FG_NAV_MAX_RANGE = 300; // nm
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class FGNavRecord : public FGPositioned
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{
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int freq;
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int range;
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double multiuse; // can be slaved variation of VOR
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// (degrees) or localizer heading
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// (degrees) or dme bias (nm)
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std::string mName; // verbose name in nav database
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PositionedID mRunway; // associated runway, if there is one
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PositionedID mColocated; // Colocated DME at a navaid (ILS, VOR, TACAN, NDB)
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protected:
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mutable bool serviceable; // for failure modeling
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public:
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FGNavRecord( PositionedID aGuid,
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Type type,
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const std::string& ident,
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const std::string& name,
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const SGGeod& aPos,
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int freq,
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int range,
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double multiuse,
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PositionedID aRunway );
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inline double get_lon() const { return longitude(); } // degrees
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inline double get_lat() const { return latitude(); } // degrees
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inline double get_elev_ft() const { return elevation(); }
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inline int get_freq() const { return freq; }
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inline int get_range() const { return range; }
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inline double get_multiuse() const { return multiuse; }
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inline void set_multiuse( double m ) { multiuse = m; }
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inline const char *get_ident() const { return ident().c_str(); }
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inline bool get_serviceable() const { return serviceable; }
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inline const char *get_trans_ident() const { return get_ident(); }
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virtual const std::string& name() const
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{ return mName; }
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/**
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* Retrieve the runway this navaid is associated with (for ILS/LOC/GS)
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*/
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FGRunwayRef runway() const;
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/**
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* return the localizer width, in degrees
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* computation is based up ICAO stdandard width at the runway threshold
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* see implementation for further details.
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*/
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double localizerWidth() const;
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void bindToNode(SGPropertyNode* nd) const;
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void unbindFromNode(SGPropertyNode* nd) const;
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void setColocatedDME(PositionedID other);
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bool hasDME();
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void updateFromXML(const SGGeod& geod, double heading);
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};
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/**
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* A mobile navaid, aka. a navaid which can change its position (eg. a mobile
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* TACAN)
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*/
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class FGMobileNavRecord:
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public FGNavRecord
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{
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public:
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FGMobileNavRecord( PositionedID aGuid,
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Type type,
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const std::string& ident,
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const std::string& name,
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const SGGeod& aPos,
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int freq,
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int range,
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double multiuse,
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PositionedID aRunway );
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virtual const SGGeod& geod() const;
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virtual const SGVec3d& cart() const;
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void updateVehicle();
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void updatePos();
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protected:
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SGTimeStamp _last_vehicle_update;
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SGPropertyNode_ptr _vehicle_node;
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double _initial_elevation_ft; // Elevation as given in the config file
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};
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class FGTACANRecord : public SGReferenced {
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std::string channel;
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int freq;
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public:
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FGTACANRecord(void);
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inline ~FGTACANRecord(void) {}
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inline const std::string& get_channel() const { return channel; }
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inline int get_freq() const { return freq; }
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friend std::istream& operator>> ( std::istream&, FGTACANRecord& );
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};
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#endif // _FG_NAVRECORD_HXX
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