15139a42b6
the next airport or airport with METAR station, but about any type of airport - as a side effect this change makes it also 30 to 50% faster :-) In the long run this linear search shall be replaced with a spatial algorithm (like octree), which will be a much bigger performance gain.
315 lines
8.3 KiB
C++
315 lines
8.3 KiB
C++
//
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// simple.cxx -- a really simplistic class to manage airport ID,
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// lat, lon of the center of one of it's runways, and
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// elevation in feet.
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//
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// Written by Curtis Olson, started April 1998.
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// Updated by Durk Talsma, started December, 2004.
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//
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// Copyright (C) 1998 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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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <math.h>
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#include <algorithm>
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#include <simgear/compiler.h>
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#include <plib/sg.h>
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#include <plib/ul.h>
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#include <Environment/environment_mgr.hxx>
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#include <Environment/environment.hxx>
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#include <simgear/misc/sg_path.hxx>
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#include <simgear/props/props.hxx>
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#include <simgear/structure/subsystem_mgr.hxx>
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//#include <simgear/route/waypoint.hxx>
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#include <simgear/debug/logstream.hxx>
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#include <Main/globals.hxx>
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#include <Main/fg_props.hxx>
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#include <Airports/runways.hxx>
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#include STL_STRING
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#include "simple.hxx"
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#include "xmlloader.hxx"
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SG_USING_STD(sort);
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SG_USING_STD(random_shuffle);
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/***************************************************************************
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* FGAirport
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***************************************************************************/
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FGAirport::FGAirport() : _dynamics(0)
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{
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}
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FGAirport::FGAirport(const string &id, const SGGeod& location, const SGGeod& tower_location,
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const string &name, bool has_metar, bool is_airport, bool is_seaport,
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bool is_heliport) :
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_id(id),
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_location(location),
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_tower_location(tower_location),
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_name(name),
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_has_metar(has_metar),
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_is_airport(is_airport),
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_is_seaport(is_seaport),
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_is_heliport(is_heliport),
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_dynamics(0)
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{
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}
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FGAirport::~FGAirport()
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{
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delete _dynamics;
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}
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FGAirportDynamics * FGAirport::getDynamics()
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{
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if (_dynamics != 0) {
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return _dynamics;
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} else {
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//cerr << "Trying to load dynamics for " << _id << endl;
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_dynamics = new FGAirportDynamics(this);
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XMLLoader::load(_dynamics);
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FGRunwayPreference rwyPrefs(this);
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XMLLoader::load(&rwyPrefs);
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_dynamics->setRwyUse(rwyPrefs);
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}
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return _dynamics;
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}
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/******************************************************************************
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* FGAirportList
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*****************************************************************************/
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// Populates a list of subdirectories of $FG_ROOT/Airports/AI so that
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// the add() method doesn't have to try opening 2 XML files in each of
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// thousands of non-existent directories. FIXME: should probably add
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// code to free this list after parsing of apt.dat is finished;
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// non-issue at the moment, however, as there are no AI subdirectories
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// in the base package.
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//
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// Note: 2005/12/23: This is probably not necessary anymore, because I'm
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// Switching to runtime airport dynamics loading (DT).
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FGAirportList::FGAirportList()
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{
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// ulDir* d;
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// ulDirEnt* dent;
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// SGPath aid( globals->get_fg_root() );
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// aid.append( "/Airports/AI" );
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// if((d = ulOpenDir(aid.c_str())) == NULL)
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// return;
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// while((dent = ulReadDir(d)) != NULL) {
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// SG_LOG( SG_GENERAL, SG_DEBUG, "Dent: " << dent->d_name );
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// ai_dirs.insert(dent->d_name);
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// }
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// ulCloseDir(d);
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}
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FGAirportList::~FGAirportList( void )
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{
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for (unsigned int i = 0; i < airports_array.size(); ++i) {
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delete airports_array[i];
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}
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}
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// add an entry to the list
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void FGAirportList::add( const string &id, const SGGeod& location, const SGGeod& tower_location,
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const string &name, bool has_metar, bool is_airport, bool is_seaport,
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bool is_heliport)
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{
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FGAirport* a = new FGAirport(id, location, tower_location, name, has_metar,
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is_airport, is_seaport, is_heliport);
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airports_by_id[a->getId()] = a;
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// try and read in an auxilary file
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airports_array.push_back( a );
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SG_LOG( SG_GENERAL, SG_BULK, "Adding " << id << " pos = " << location.getLongitudeDeg()
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<< ", " << location.getLatitudeDeg() << " elev = " << location.getElevationFt() );
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}
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// search for the specified id
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FGAirport* FGAirportList::search( const string& id)
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{
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airport_map_iterator itr = airports_by_id.find(id);
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return (itr == airports_by_id.end() ? NULL : itr->second);
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}
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// search for first subsequent alphabetically to supplied id
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const FGAirport* FGAirportList::findFirstById( const string& id, bool exact )
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{
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airport_map_iterator itr;
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if (exact) {
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itr = airports_by_id.find(id);
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} else {
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itr = airports_by_id.lower_bound(id);
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}
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if (itr == airports_by_id.end()) {
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return (NULL);
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} else {
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return (itr->second);
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}
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}
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// search for the airport nearest the specified position
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FGAirport* FGAirportList::search(double lon_deg, double lat_deg)
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{
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static FGAirportSearchFilter accept_any;
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return search(lon_deg, lat_deg, accept_any);
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}
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// search for the airport nearest the specified position and
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// passing the filter
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FGAirport* FGAirportList::search(double lon_deg, double lat_deg,
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FGAirportSearchFilter& search)
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{
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double min_dist = 360.0;
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airport_list_iterator it = airports_array.begin();
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airport_list_iterator end = airports_array.end();
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airport_list_iterator closest = end;
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for (; it != end; ++it) {
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if (!search.acceptable(*it))
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continue;
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// crude manhatten distance based on lat/lon difference
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double d = fabs(lon_deg - (*it)->getLongitude())
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+ fabs(lat_deg - (*it)->getLatitude());
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if (d < min_dist) {
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closest = it;
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min_dist = d;
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}
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}
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return closest != end ? *closest : 0;
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}
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int
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FGAirportList::size () const
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{
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return airports_array.size();
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}
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const FGAirport *FGAirportList::getAirport( unsigned int index ) const
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{
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if (index < airports_array.size()) {
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return(airports_array[index]);
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} else {
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return(NULL);
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}
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}
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/**
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* Mark the specified airport record as not having metar
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*/
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void FGAirportList::no_metar( const string &id )
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{
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if(airports_by_id.find(id) != airports_by_id.end()) {
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airports_by_id[id]->setMetar(false);
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}
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}
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/**
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* Mark the specified airport record as (yes) having metar
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*/
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void FGAirportList::has_metar( const string &id )
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{
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if(airports_by_id.find(id) != airports_by_id.end()) {
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airports_by_id[id]->setMetar(true);
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}
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}
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// find basic airport location info from airport database
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const FGAirport *fgFindAirportID( const string& id)
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{
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const FGAirport* result = NULL;
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if ( id.length() ) {
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SG_LOG( SG_GENERAL, SG_BULK, "Searching for airport code = " << id );
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result = globals->get_airports()->search( id );
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if ( result == NULL ) {
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SG_LOG( SG_GENERAL, SG_ALERT,
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"Failed to find " << id << " in apt.dat.gz" );
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return NULL;
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}
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} else {
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return NULL;
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}
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SG_LOG( SG_GENERAL, SG_BULK,
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"Position for " << id << " is ("
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<< result->getLongitude() << ", "
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<< result->getLatitude() << ")" );
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return result;
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}
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// get airport elevation
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double fgGetAirportElev( const string& id )
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{
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SG_LOG( SG_GENERAL, SG_BULK,
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"Finding elevation for airport: " << id );
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const FGAirport *a=fgFindAirportID( id);
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if (a) {
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return a->getElevation();
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} else {
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return -9999.0;
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}
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}
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// get airport position
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Point3D fgGetAirportPos( const string& id )
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{
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SG_LOG( SG_ATC, SG_BULK,
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"Finding position for airport: " << id );
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const FGAirport *a = fgFindAirportID( id);
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if (a) {
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return Point3D(a->getLongitude(), a->getLatitude(), a->getElevation());
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} else {
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return Point3D(0.0, 0.0, -9999.0);
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}
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}
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