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()
31 #include <simgear/compiler.h>
35 #include "runways.hxx"
39 static std::string cleanRunwayNo(const std::string& aRwyNo)
41 if (aRwyNo[0] == 'x') {
42 return std::string(); // no ident for taxiways
45 string result(aRwyNo);
46 // canonicalise runway ident
47 if ((aRwyNo.size() == 1) || !isdigit(aRwyNo[1])) {
48 result = "0" + aRwyNo;
51 // trim off trailing garbage
52 if (result.size() > 2) {
53 char suffix = toupper(result[2]);
55 result = result.substr(0, 2);
62 FGRunway::FGRunway(FGAirport* aAirport, const string& aIdent,
64 const double heading, const double length,
66 const double displ_thresh,
68 const int surface_code,
70 FGRunwayBase(RUNWAY, cleanRunwayNo(aIdent), aGeod, heading, length, width, surface_code, true),
72 _reciprocal(reciprocal),
73 _displ_thresh(displ_thresh),
78 string FGRunway::reverseIdent(const string& aRunwayIdent)
80 // Helipads don't have a seperate number per end
81 if (aRunwayIdent.size() && (aRunwayIdent[0] == 'H' || aRunwayIdent[0] == 'h' || aRunwayIdent[0] == 'x')) {
85 std::string ident(aRunwayIdent);
88 int rn = atoi(ident.substr(0,2).c_str());
94 sprintf(buf, "%02i", rn);
95 if(ident.size() == 3) {
96 char suffix = toupper(ident[2]);
99 } else if (suffix == 'R') {
102 // something else, just copy
112 double FGRunway::score(double aLengthWt, double aWidthWt, double aSurfaceWt) const
115 if (_surface_code == 12 || _surface_code == 5) // dry lakebed & gravel
117 else if (_surface_code == 1 || _surface_code == 2) // asphalt & concrete
120 return _length * aLengthWt + _width * aWidthWt + surface * aSurfaceWt + 1e-20;
123 SGGeod FGRunway::begin() const
125 return pointOnCenterline(0.0);
128 SGGeod FGRunway::end() const
130 return pointOnCenterline(lengthM());
133 SGGeod FGRunway::threshold() const
135 return pointOnCenterline(_displ_thresh * SG_FEET_TO_METER);