-// runways.hxx -- a simple class to manage airport runway info
+// runways.cxx -- a simple class to manage airport runway info
//
// Written by Curtis Olson, started August 2000.
//
# include <config.h>
#endif
-// #include <sys/types.h> // for gdbm open flags
-// #include <sys/stat.h> // for gdbm open flags
+#include <math.h> // fabs()
+#include <stdio.h> // sprintf()
#include <simgear/compiler.h>
SG_USING_NAMESPACE(std);
+#ifndef _MSC_VER
+#define NDEBUG // MSVC needs this
+#endif // !_MSC_VER
-FGRunway::FGRunway() {
-}
+#include <mk4.h>
+#include <mk4str.h>
+
+#ifndef _MSC_VER
+#undef NDEBUG
+#endif // !_MSC_VER
+
+#ifdef SG_HAVE_STD_INCLUDES
+# include <istream>
+#elif defined( __BORLANDC__ ) || defined (__APPLE__)
+# include <iostream>
+#else
+# include <istream.h>
+#endif
+
+SG_USING_STD(istream);
+inline istream&
+operator >> ( istream& in, FGRunway& a )
+{
+ int tmp;
-FGRunway::~FGRunway() {
+ return in >> a.rwy_no >> a.lat >> a.lon >> a.heading >> a.length >> a.width
+ >> a.surface_flags >> a.end1_flags >> tmp >> tmp >> a.end2_flags
+ >> tmp >> tmp;
}
vRunway = new c4_View;
*vRunway =
- storage->GetAs("runway[ID:S,Rwy:S,Longitude:F,Latitude:F,Heading:F,Length:F,Width:F,SurfaceFlags:S,End1Flags:F,End2Flags:F]");
+ storage->GetAs("runway[ID:S,Rwy:S,Longitude:F,Latitude:F,Heading:F,Length:F,Width:F,SurfaceFlags:S,End1Flags:S,End2Flags:S]");
next_index = 0;
}
+// Return reverse rwy number
+// eg 01 -> 19
+// 03L -> 21R
+static string GetReverseRunwayNo(string rwyno) {
+ // cout << "Original rwyno = " << rwyNo << '\n';
+
+ // standardize input number
+ string tmp = rwyno.substr(1, 1);
+ if (( tmp == "L" || tmp == "R" || tmp == "C" ) || (rwyno.size() == 1)) {
+ tmp = rwyno;
+ rwyno = "0" + tmp;
+ SG_LOG( SG_GENERAL, SG_INFO, "Standardising rwy number from " << tmp
+ << " to " << rwyno );
+ }
+
+ char buf[4];
+ int rn = atoi(rwyno.substr(0,2).c_str());
+ rn += 18;
+ while(rn > 36) {
+ rn -= 36;
+ }
+ sprintf(buf, "%02i", rn);
+ if(rwyno.size() == 3) {
+ if(rwyno.substr(2,1) == "L") {
+ buf[2] = 'R';
+ buf[3] = '\0';
+ } else if (rwyno.substr(2,1) == "R") {
+ buf[2] = 'L';
+ buf[3] = '\0';
+ } else if (rwyno.substr(2,1) == "C") {
+ buf[2] = 'C';
+ buf[3] = '\0';
+ } else {
+ SG_LOG(SG_GENERAL, SG_ALERT, "Unknown runway code "
+ << rwyno << " passed to GetReverseRunwayNo(...)");
+ }
+ }
+ return((string)buf);
+}
+
+
// search for the specified apt id
bool FGRunways::search( const string& aptid, FGRunway* r ) {
c4_StringProp pID ("ID");
c4_StringProp pEnd2 ("End2Flags");
int index = vRunway->Find(pID[aptid.c_str()]);
- cout << "index = " << index << endl;
+ // cout << "index = " << index << endl;
if ( index == -1 ) {
return false;
// search for the specified apt id and runway no
bool FGRunways::search( const string& aptid, const string& rwyno, FGRunway* r )
{
+ string runwayno = rwyno;
c4_StringProp pID ("ID");
c4_StringProp pRwy ("Rwy");
c4_FloatProp pLon ("Longitude");
c4_StringProp pEnd2 ("End2Flags");
int index = vRunway->Find(pID[aptid.c_str()]);
- cout << "index = " << index << endl;
+ // cout << "index = " << index << endl;
if ( index == -1 ) {
return false;
}
+
+ // standardize input number
+ string tmp = runwayno.substr(1, 1);
+ if (( tmp == "L" || tmp == "R" || tmp == "C" ) || (runwayno.size() == 1)) {
+ tmp = runwayno;
+ runwayno = "0" + tmp;
+ SG_LOG(SG_GENERAL, SG_INFO, "Standardising rwy number from " << tmp
+ << " to " << runwayno );
+ }
c4_RowRef row = vRunway->GetAt(index);
string rowid = (const char *) pID(row);
while ( rowid == aptid ) {
next_index = index + 1;
- if ( rowrwyno == rwyno ) {
+ if ( rowrwyno == runwayno ) {
r->id = (const char *) pID(row);
r->rwy_no = (const char *) pRwy(row);
r->lon = (double) pLon(row);
return true;
}
+
+ // Search again with the other-end runway number
+ // Remember we have to munge the heading and rwy_no results if this one matches
+ rowrwyno = GetReverseRunwayNo(rowrwyno);
+ // cout << "New rowrwyno = " << rowrwyno << '\n';
+ if ( rowrwyno == runwayno ) {
+ r->id = (const char *) pID(row);
+ r->rwy_no = rowrwyno;
+ r->lon = (double) pLon(row);
+ r->lat = (double) pLat(row);
+ r->heading = (double) pHdg(row) + 180.0;
+ r->length = (double) pLen(row);
+ r->width = (double) pWid(row);
+ r->surface_flags = (const char *) pSurf(row);
+ r->end1_flags = (const char *) pEnd2(row);
+ r->end2_flags = (const char *) pEnd1(row);
+ // I've swapped the end flags as well
+
+ return true;
+ }
index++;
- c4_RowRef row = vRunway->GetAt(index);
- string rowid = (const char *) pID(row);
- string rowrwyno = (const char *) pRwy(row);
+ row = vRunway->GetAt(index);
+ rowid = (const char *) pID(row);
+ rowrwyno = (const char *) pRwy(row);
}
return false;
}
+// Return the runway closest to a given heading
+bool FGRunways::search( const string& aptid, const int tgt_hdg,
+ FGRunway* runway )
+{
+ string rwyNo = search(aptid, tgt_hdg);
+ return(rwyNo == "NN" ? false : search(aptid, rwyNo, runway));
+}
+
+
+// Return the runway number of the runway closest to a given heading
+string FGRunways::search( const string& aptid, const int tgt_hdg ) {
+ FGRunway r;
+ FGRunway tmp_r;
+ string rn;
+ double found_dir = 0.0;
+
+ if ( !search( aptid, &tmp_r ) ) {
+ SG_LOG( SG_GENERAL, SG_ALERT,
+ "Failed to find " << aptid << " in database." );
+ return "NN";
+ }
+
+ double diff;
+ double min_diff = 360.0;
+
+ while ( tmp_r.id == aptid ) {
+ r = tmp_r;
+
+ // forward direction
+ diff = tgt_hdg - r.heading;
+ while ( diff < -180.0 ) { diff += 360.0; }
+ while ( diff > 180.0 ) { diff -= 360.0; }
+ diff = fabs(diff);
+ // SG_LOG( SG_GENERAL, SG_INFO,
+ // "Runway " << r.rwy_no << " heading = " << r.heading <<
+ // " diff = " << diff );
+ if ( diff < min_diff ) {
+ min_diff = diff;
+ rn = r.rwy_no;
+ found_dir = 0;
+ }
+
+ // reverse direction
+ diff = tgt_hdg - r.heading - 180.0;
+ while ( diff < -180.0 ) { diff += 360.0; }
+ while ( diff > 180.0 ) { diff -= 360.0; }
+ diff = fabs(diff);
+ // SG_LOG( SG_GENERAL, SG_INFO,
+ // "Runway -" << r.rwy_no << " heading = " <<
+ // r.heading + 180.0 <<
+ // " diff = " << diff );
+ if ( diff < min_diff ) {
+ min_diff = diff;
+ rn = r.rwy_no;
+ found_dir = 180.0;
+ }
+
+ next( &tmp_r );
+ }
+
+ // SG_LOG( SG_GENERAL, SG_INFO, "closest runway = " << r.rwy_no
+ // << " + " << found_dir );
+ rn = r.rwy_no;
+ // cout << "In search, rn = " << rn << endl;
+ if ( found_dir == 180 ) {
+ rn = GetReverseRunwayNo(rn);
+ //cout << "New rn = " << rn << '\n';
+ }
+
+ return rn;
+}
+
+
// Destructor
FGRunways::~FGRunways( void ) {
delete storage;
// save the data in gdbm format
bool FGRunwaysUtil::dump_mk4( const string& file ) {
-
// open database for writing
c4_Storage storage( file.c_str(), true );
// Start with an empty view of the proper structure.
c4_View vRunway =
- storage.GetAs("runway[ID:S,Rwy:S,Longitude:F,Latitude:F,Heading:F,Length:F,Width:F,SurfaceFlags:S,End1Flags:F,End2Flags:F]");
+ storage.GetAs("runway[ID:S,Rwy:S,Longitude:F,Latitude:F,Heading:F,Length:F,Width:F,SurfaceFlags:S,End1Flags:S,End2Flags:S]");
c4_Row row;
projects / flightgear.git / blobdiff