140 lines
3.6 KiB
C++
140 lines
3.6 KiB
C++
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// positioned.hxx - base class for objects which are positioned
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//
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// Copyright (C) 2008 James Turner
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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_POSITIONED_HXX
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#define FG_POSITIONED_HXX
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#include <vector>
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#include <simgear/structure/SGSharedPtr.hxx>
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#include <simgear/bucket/newbucket.hxx>
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class FGPositioned;
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typedef SGSharedPtr<FGPositioned> FGPositionedRef;
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class FGPositioned : public SGReferenced
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{
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public:
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typedef enum {
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INVALID = 0,
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AIRPORT,
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HELIPORT,
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SEAPORT,
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RUNWAY,
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TAXIWAY,
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PARK_STAND,
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FIX,
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VOR,
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NDB,
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ILS,
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LOC,
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GS,
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OM,
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MM,
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IM,
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DME,
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TACAN,
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OBSTACLE,
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WAYPOINT, // user-defined waypoint
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FREQ_GND,
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FREQ_TWR,
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FREQ_ATIS,
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LAST_TYPE
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} Type;
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typedef std::vector<FGPositionedRef> List;
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virtual ~FGPositioned();
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Type type() const
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{ return mType; }
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const std::string& ident() const
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{ return mIdent; }
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const SGGeod& geod() const
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{ return mPosition; }
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SGBucket bucket() const;
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double latitude() const
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{ return mPosition.getLatitudeDeg(); }
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double longitude() const
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{ return mPosition.getLongitudeDeg(); }
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double elevation() const
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{ return mPosition.getElevationFt(); }
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/**
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* Predicate class to support custom filtering of FGPositioned queries
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*/
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class Filter
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{
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public:
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virtual ~Filter() { ; }
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virtual bool pass(FGPositioned* aPos) const = 0;
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bool operator()(FGPositioned* aPos) const
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{ return pass(aPos); }
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};
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static List findWithinRange(const SGGeod& aPos, double aRangeNm, const Filter& aFilter);
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static List findWithinRangeByType(const SGGeod& aPos, double aRangeNm, Type aTy);
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static FGPositionedRef findClosestWithIdent(const std::string& aIdent, double aLat, double aLon);
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static FGPositionedRef findClosestWithIdent(const std::string& aIdent, const SGGeod& aPos);
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static List findAllWithIdent(const std::string& aIdent);
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/**
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* Find the closest N items to a position, which pass the specified filter
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* A cutoff range in NM must be specified, to constrain the search acceptably.
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* Very large cutoff values will make this slow.
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*
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* @result The matches (possibly less than N, depending on the filter and cutoff),
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* sorted by distance from the search pos
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* @param aN - number of matches to find
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* @param aCutoffNm - maximum distance to search within, in nautical miles
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*/
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static List findClosestN(const SGGeod& aPos, unsigned int aN, double aCutoffNm, const Filter& aFilter);
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/**
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* Debug helper, map a type to a human-readable string
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*/
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static const char* nameForType(Type aTy);
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protected:
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FGPositioned(Type ty, const std::string& aIdent, double aLat, double aLon, double aElev);
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FGPositioned(Type ty, const std::string& aIdent, const SGGeod& aPos);
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SGGeod mPosition; // can't be const right now
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Type mType;
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std::string mIdent;
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};
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#endif // of FG_POSITIONED_HXX
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