9b900e9430
Cache the parsed navigation and airport data in a binary file to reduce startup times and memory consumption (since only referenced FGPositioned elements are held in memory). Data will be reimported when the mod-time of any input file is changed. If a global file is changed (nav.dat, awy.dat, apt.dat, etc), the cache will be completely rebuilt, which takes approximately 30 seconds on moderate hardware. (Future work may reduce this).
110 lines
3 KiB
C++
110 lines
3 KiB
C++
// runwaybase.hxx -- represent a runway or taxiway
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//
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// Written by James Turner, started December 2000.
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//
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// Copyright (C) 2000 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_RUNWAY_BASE_HXX
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#define _FG_RUNWAY_BASE_HXX
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#include <simgear/compiler.h>
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#include <simgear/math/sg_geodesy.hxx>
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#include <Navaids/positioned.hxx>
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#include <string>
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/**
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* @class The base class for runways and taxiways. At present, FGTaxiway is
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* a direct instantiation of this class.
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*/
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class FGRunwayBase : public FGPositioned
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{
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public:
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FGRunwayBase(PositionedID aGuid, Type aTy, const std::string& aIdent,
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const SGGeod& aGeod,
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const double heading, const double length,
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const double width,
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const int surface_code);
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/**
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* Retrieve a position on the extended centerline. Positive values
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* are in the direction of the runway heading, negative values are in the
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* opposited direction. 0.0 corresponds to the (non-displaced) threshold
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*/
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SGGeod pointOnCenterline(double aOffset) const;
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SGGeod pointOffCenterline(double aOffset, double lateralOffset) const;
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double lengthFt() const
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{ return _length; }
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double lengthM() const
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{ return _length * SG_FEET_TO_METER; }
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double widthFt() const
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{ return _width; }
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double widthM() const
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{ return _width * SG_FEET_TO_METER; }
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/**
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* Runway heading in degrees.
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*/
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double headingDeg() const
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{ return _heading; }
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/**
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* Predicate to test if this runway has a hard surface. For the moment, this
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* means concrete or asphalt
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*/
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bool isHardSurface() const;
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/**
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* Retrieve runway surface code, as define in Robin Peel's data
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*/
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int surface() const
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{ return _surface_code; }
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protected:
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double _heading;
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double _length;
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double _width;
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/** surface, as defined by:
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* http://www.x-plane.org/home/robinp/Apt810.htm#RwySfcCodes
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*/
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int _surface_code;
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};
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// for the moment, taxiways are simply a concrete RunwayBase
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class FGTaxiway : public FGRunwayBase
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{
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public:
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FGTaxiway(PositionedID aGuid,
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const std::string& aIdent,
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const SGGeod& aGeod,
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const double heading, const double length,
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const double width,
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const int surface_code);
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};
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#endif // _FG_RUNWAY_BASE_HXX
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