1 // positioned.hxx - base class for objects which are positioned
3 // Copyright (C) 2008 James Turner
5 // This program is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU General Public License as
7 // published by the Free Software Foundation; either version 2 of the
8 // License, or (at your option) any later version.
10 // This program is distributed in the hope that it will be useful, but
11 // WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 #ifndef FG_POSITIONED_HXX
22 #define FG_POSITIONED_HXX
27 #include <simgear/structure/SGSharedPtr.hxx>
28 #include <simgear/math/SGMath.hxx>
33 typedef SGSharedPtr<FGPositioned> FGPositionedRef;
37 class PositionedBinding;
40 class FGPositioned : public SGReferenced
77 typedef std::vector<FGPositionedRef> List;
79 virtual ~FGPositioned();
84 const std::string& ident() const
88 * Return the name of this positioned. By default this is the same as the
89 * ident, but for many derived classes it's more meaningful - the aiport or
90 * navaid name, for example.
92 virtual const std::string& name() const
95 const SGGeod& geod() const
99 * The cartesian position associated with this object
101 const SGVec3d& cart() const;
103 double latitude() const
104 { return mPosition.getLatitudeDeg(); }
106 double longitude() const
107 { return mPosition.getLongitudeDeg(); }
109 double elevation() const
110 { return mPosition.getElevationFt(); }
113 virtual flightgear::PositionedBinding* createBinding(SGPropertyNode* nd) const;
116 * Predicate class to support custom filtering of FGPositioned queries
117 * Default implementation of this passes any FGPositioned instance.
122 virtual ~Filter() { ; }
125 * Over-rideable filter method. Default implementation returns true.
127 virtual bool pass(FGPositioned* aPos) const
130 virtual Type minType() const
133 virtual Type maxType() const
137 * Test if this filter has a non-empty type range
139 bool hasTypeRange() const;
142 * Assuming hasTypeRange is true, test if a given type passes the range
144 bool passType(Type aTy) const;
146 bool operator()(FGPositioned* aPos) const
147 { return pass(aPos); }
150 class TypeFilter : public Filter
153 TypeFilter(Type aTy);
154 virtual bool pass(FGPositioned* aPos) const;
155 void addType(Type aTy);
157 std::vector<Type> types;
160 static List findWithinRange(const SGGeod& aPos, double aRangeNm, Filter* aFilter = NULL);
162 static FGPositionedRef findClosestWithIdent(const std::string& aIdent, const SGGeod& aPos, Filter* aFilter = NULL);
165 * Find the next item with the specified partial ID, after the 'current' item
166 * Note this function is not hyper-efficient, particular where the partial id
167 * spans a large number of candidates.
169 * @param aCur - Current item, or NULL to retrieve the first item with partial id
170 * @param aId - the (partial) id to lookup
172 static FGPositionedRef findNextWithPartialId(FGPositionedRef aCur, const std::string& aId, Filter* aFilter = NULL);
175 * Find all items with the specified ident
176 * @param aFilter - optional filter on items
178 static List findAllWithIdent(const std::string& aIdent, Filter* aFilter = NULL, bool aExact = true);
181 * As above, but searches names instead of idents
183 static List findAllWithName(const std::string& aName, Filter* aFilter = NULL, bool aExact = true);
186 * Sort an FGPositionedList by distance from a position
188 static void sortByRange(List&, const SGGeod& aPos);
191 * Find the closest item to a position, which pass the specified filter
192 * A cutoff range in NM must be specified, to constrain the search acceptably.
193 * Very large cutoff values will make this slow.
195 * @result The closest item passing the filter, or NULL
196 * @param aCutoffNm - maximum distance to search within, in nautical miles
198 static FGPositionedRef findClosest(const SGGeod& aPos, double aCutoffNm, Filter* aFilter = NULL);
201 * Find the closest N items to a position, which pass the specified filter
202 * A cutoff range in NM must be specified, to constrain the search acceptably.
203 * Very large cutoff values will make this slow.
205 * @result The matches (possibly less than N, depending on the filter and cutoff),
206 * sorted by distance from the search pos
207 * @param aN - number of matches to find
208 * @param aCutoffNm - maximum distance to search within, in nautical miles
210 static List findClosestN(const SGGeod& aPos, unsigned int aN, double aCutoffNm, Filter* aFilter = NULL);
213 * Map a candidate type string to a real type. Returns INVALID if the string
214 * does not correspond to a defined type.
216 static Type typeFromName(const std::string& aName);
219 * Map a type to a human-readable string
221 static const char* nameForType(Type aTy);
223 static FGPositioned* createUserWaypoint(const std::string& aIdent, const SGGeod& aPos);
226 FGPositioned(Type ty, const std::string& aIdent, const SGGeod& aPos);
228 void init(bool aIndexed);
230 // can't be const right now, navrecord at least needs to fix up the position
231 // after navaids are parsed
234 SGVec3d mCart; // once mPosition is const, this can be const too
236 const std::string mIdent;
239 #endif // of FG_POSITIONED_HXX