1 // runways.cxx -- a simple class to manage airport runway info
3 // Written by Curtis Olson, started August 2000.
5 // Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
28 #include <cstdio> // sprintf()
29 #include <cstdlib> // atoi()
32 #include <simgear/compiler.h>
34 #include <simgear/props/props.hxx>
38 #include "runways.hxx"
40 #include <Airports/simple.hxx>
41 #include <Navaids/procedure.hxx>
42 #include <Navaids/navrecord.hxx>
43 #include <Navaids/PositionedBinding.hxx>
47 static std::string cleanRunwayNo(const std::string& aRwyNo)
49 if (aRwyNo[0] == 'x') {
50 return std::string(); // no ident for taxiways
53 string result(aRwyNo);
54 // canonicalise runway ident
55 if ((aRwyNo.size() == 1) || !isdigit(aRwyNo[1])) {
56 result = "0" + aRwyNo;
59 // trim off trailing garbage
60 if (result.size() > 2) {
61 char suffix = toupper(result[2]);
63 result = result.substr(0, 2);
70 FGRunway::FGRunway(FGAirport* aAirport, const string& aIdent,
72 const double heading, const double length,
74 const double displ_thresh,
76 const int surface_code,
78 FGRunwayBase(RUNWAY, cleanRunwayNo(aIdent), aGeod, heading, length, width, surface_code, true),
80 _isReciprocal(reciprocal),
82 _displ_thresh(displ_thresh),
88 string FGRunway::reverseIdent(const string& aRunwayIdent)
90 // Helipads don't have a seperate number per end
91 if (aRunwayIdent.size() && (aRunwayIdent[0] == 'H' || aRunwayIdent[0] == 'h' || aRunwayIdent[0] == 'x')) {
95 std::string ident(aRunwayIdent);
98 int rn = atoi(ident.substr(0,2).c_str());
104 sprintf(buf, "%02i", rn);
105 if(ident.size() == 3) {
106 char suffix = toupper(ident[2]);
109 } else if (suffix == 'R') {
112 // something else, just copy
122 double FGRunway::score(double aLengthWt, double aWidthWt, double aSurfaceWt) const
125 if (_surface_code == 12 || _surface_code == 5) // dry lakebed & gravel
127 else if (_surface_code == 1 || _surface_code == 2) // asphalt & concrete
130 return _length * aLengthWt + _width * aWidthWt + surface * aSurfaceWt + 1e-20;
133 SGGeod FGRunway::begin() const
135 return pointOnCenterline(0.0);
138 SGGeod FGRunway::end() const
140 return pointOnCenterline(lengthM());
143 SGGeod FGRunway::threshold() const
145 return pointOnCenterline(_displ_thresh * SG_FEET_TO_METER);
148 void FGRunway::processThreshold(SGPropertyNode* aThreshold)
150 assert(ident() == aThreshold->getStringValue("rwy"));
152 double lon = aThreshold->getDoubleValue("lon"),
153 lat = aThreshold->getDoubleValue("lat");
154 SGGeod newThreshold(SGGeod::fromDegM(lon, lat, mPosition.getElevationM()));
156 _heading = aThreshold->getDoubleValue("hdg-deg");
157 _displ_thresh = aThreshold->getDoubleValue("displ-m") * SG_METER_TO_FEET;
158 _stopway = aThreshold->getDoubleValue("stopw-m") * SG_METER_TO_FEET;
160 // compute the new runway center, based on the threshold lat/lon and length,
161 double offsetFt = (0.5 * _length);
164 SGGeodesy::direct(newThreshold, _heading, offsetFt * SG_FEET_TO_METER, newCenter, dummy);
165 mPosition = newCenter;
168 void FGRunway::setReciprocalRunway(FGRunway* other)
170 assert(_reciprocal==NULL);
171 assert((other->_reciprocal == NULL) || (other->_reciprocal == this));
176 std::vector<flightgear::SID*> FGRunway::getSIDs()
178 std::vector<flightgear::SID*> result;
179 for (unsigned int i=0; i<_airport->numSIDs(); ++i) {
180 flightgear::SID* s = _airport->getSIDByIndex(i);
181 if (s->isForRunway(this)) {
184 } // of SIDs at the airport iteration
189 std::vector<flightgear::STAR*> FGRunway::getSTARs()
191 std::vector<flightgear::STAR*> result;
192 for (unsigned int i=0; i<_airport->numSTARs(); ++i) {
193 flightgear::STAR* s = _airport->getSTARByIndex(i);
194 if (s->isForRunway(this)) {
197 } // of STARs at the airport iteration
202 flightgear::PositionedBinding*
203 FGRunway::createBinding(SGPropertyNode* nd) const
205 return new flightgear::RunwayBinding(this, nd);